/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0f2b4b;
  --primary-light: #1a4a7a;
  --primary-lighter: #2d6da8;
  --accent: #e89b2a;
  --accent-light: #f5b943;
  --accent-glow: rgba(232, 155, 42, 0.25);
  --bg-body: #f4f6fa;
  --bg-white: #ffffff;
  --bg-dark: #0a1a2e;
  --bg-card: #ffffff;
  --text-dark: #111827;
  --text-body: #1f2937;
  --text-muted: #6b7280;
  --text-light: #f9fafb;
  --border-color: #e5e7eb;
  --border-light: rgba(255,255,255,0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 30px rgba(232,155,42,0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --container-max: 1200px;
  --header-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-body);
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-dark); font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 0.5rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.15rem; }
p { margin-bottom: 0.75rem; color: var(--text-body); }
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { position: relative; display: inline-block; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin: 12px auto 0; }
.section-title p { max-width: 640px; margin: 12px auto 0; color: var(--text-muted); font-size: 1.05rem; }
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer; transition: var(--transition);
  border: 2px solid transparent;
  text-align: center; justify-content: center;
}
.btn-primary {
  background: var(--accent); color: #111; border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,155,42,0.35); }
.btn-outline {
  background: transparent; color: var(--text-light); border-color: var(--text-light);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.btn-outline-accent {
  background: transparent; color: var(--accent); border-color: var(--accent);
}
.btn-outline-accent:hover { background: var(--accent); color: #111; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,155,42,0.3); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius-md); }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* ===== Header / Nav ===== */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-height);
  background: rgba(15, 43, 75, 0.55);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
header.scrolled {
  background: rgba(10, 26, 46, 0.92);
  backdrop-filter: blur(18px) saturate(200%);
  border-bottom-color: rgba(255,255,255,0.08);
  box-shadow: 0 4px 30px rgba(0,0,0,0.25);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px;
}
.logo {
  font-size: 1.35rem; font-weight: 800; color: #fff;
  letter-spacing: 0.5px; white-space: nowrap;
  display: flex; align-items: center; gap: 8px;
}
.logo i { color: var(--accent); font-size: 1.5rem; }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-list a {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 8px 18px; border-radius: var(--radius-sm);
  font-size: 0.92rem; font-weight: 500; color: rgba(255,255,255,0.8);
  transition: var(--transition); position: relative;
}
.nav-list a:hover, .nav-list a:focus-visible { color: #fff; background: rgba(255,255,255,0.08); }
.nav-list a.active { color: #fff; background: rgba(232,155,42,0.18); }
.nav-list a.active::after { content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
.nav-cta {
  padding: 8px 20px !important; background: var(--accent) !important; color: #111 !important; font-weight: 700 !important; border-radius: var(--radius-sm) !important;
}
.nav-cta:hover { background: var(--accent-light) !important; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232,155,42,0.3); }
.menu-toggle { display: none; background: none; color: #fff; font-size: 1.6rem; cursor: pointer; padding: 4px; border-radius: 6px; }
.menu-toggle:hover { background: rgba(255,255,255,0.08); }

/* ===== Mobile Nav ===== */
@media (max-width: 820px) {
  .menu-toggle { display: block; }
  .nav-list {
    position: fixed; top: var(--header-height); left: 0; right: 0;
    background: rgba(10,26,46,0.97); backdrop-filter: blur(20px);
    flex-direction: column; padding: 20px 24px; gap: 4px;
    transform: translateY(-120%); opacity: 0; pointer-events: none;
    transition: var(--transition); border-bottom: 1px solid var(--border-light);
    max-height: 70vh; overflow-y: auto;
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-list a.active::after { display: none; }
  .nav-list a.active { background: rgba(232,155,42,0.15); border-left: 3px solid var(--accent); }
  .nav-cta { margin-top: 8px; text-align: center; }
}

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  background-attachment: fixed;
  padding: 120px 24px 80px;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,26,46,0.78) 0%, rgba(15,43,75,0.60) 50%, rgba(10,26,46,0.40) 100%);
  z-index: 1;
}
.hero-glow {
  position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
  width: 500px; height: 500px; background: radial-gradient(circle, rgba(232,155,42,0.12) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none; z-index: 1;
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 820px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(232,155,42,0.15); border: 1px solid rgba(232,155,42,0.3);
  color: var(--accent); padding: 6px 18px; border-radius: 50px;
  font-size: 0.85rem; font-weight: 600; margin-bottom: 24px;
  backdrop-filter: blur(6px);
}
.hero h1 { color: #fff; font-weight: 800; line-height: 1.15; text-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem); color: rgba(255,255,255,0.8);
  max-width: 620px; margin: 20px auto 32px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2;
  color: rgba(255,255,255,0.5); font-size: 1.6rem;
  animation: float-down 2.4s ease-in-out infinite; cursor: pointer;
}
@keyframes float-down { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

/* ===== Stats / Core Strengths ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  background: var(--bg-card); border-radius: var(--radius-md);
  padding: 32px 20px; text-align: center;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.stat-icon { font-size: 2rem; color: var(--primary-lighter); margin-bottom: 12px; }
.stat-number { font-size: 2.4rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.stat-label { color: var(--text-muted); font-size: 0.92rem; margin-top: 6px; }
.stat-card.accent .stat-icon { color: var(--accent); }
.stat-card.accent .stat-number { color: var(--accent); }
@media (max-width: 820px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

/* ===== Category Cards ===== */
.cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.cat-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--bg-card); box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition); display: flex; flex-direction: column;
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.cat-card-img { position: relative; height: 200px; overflow: hidden; }
.cat-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.cat-card:hover .cat-card-img img { transform: scale(1.05); }
.cat-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,26,46,0.5) 0%, transparent 60%);
}
.cat-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.cat-card-tag {
  display: inline-block; background: var(--accent); color: #111;
  font-size: 0.75rem; font-weight: 700; padding: 4px 12px; border-radius: 50px;
  margin-bottom: 10px; align-self: flex-start;
}
.cat-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.cat-card p { color: var(--text-muted); font-size: 0.92rem; flex: 1; }
.cat-card .btn { align-self: flex-start; margin-top: 16px; }
@media (max-width: 768px) { .cat-grid { grid-template-columns: 1fr; } }

/* ===== CMS Posts ===== */
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card {
  background: var(--bg-card); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition); display: flex; flex-direction: column;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-lighter); }
.post-card-img { height: 180px; overflow: hidden; position: relative; }
.post-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.post-card:hover .post-card-img img { transform: scale(1.04); }
.post-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.post-card-cat {
  display: inline-block; font-size: 0.72rem; font-weight: 600;
  color: var(--primary-lighter); background: rgba(45,109,168,0.08);
  padding: 3px 12px; border-radius: 50px; margin-bottom: 8px; align-self: flex-start;
}
.post-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.post-card h3 a { color: var(--text-dark); }
.post-card h3 a:hover { color: var(--primary-lighter); }
.post-card p { color: var(--text-muted); font-size: 0.88rem; flex: 1; }
.post-card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 0.8rem; color: var(--text-muted); border-top: 1px solid var(--border-color); padding-top: 12px; }
.post-card-meta i { margin-right: 4px; }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 40px 20px; color: var(--text-muted); font-size: 1.05rem; background: var(--bg-card); border-radius: var(--radius-md); border: 1px dashed var(--border-color); }
@media (max-width: 900px) { .posts-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .posts-grid { grid-template-columns: 1fr; } }

/* ===== Process / Steps ===== */
.process-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.process-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08; pointer-events: none;
}
.process-section .section-title h2 { color: #fff; }
.process-section .section-title p { color: rgba(255,255,255,0.6); }
.process-section .section-title h2::after { background: var(--accent); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; z-index: 1; }
.step-card { text-align: center; padding: 32px 20px; background: rgba(255,255,255,0.04); border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.06); transition: var(--transition); }
.step-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); border-color: rgba(232,155,42,0.2); }
.step-number {
  width: 54px; height: 54px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 1.3rem; font-weight: 800;
  background: var(--accent); color: #111;
}
.step-card h4 { color: #fff; font-size: 1.1rem; margin-bottom: 8px; }
.step-card p { color: rgba(255,255,255,0.6); font-size: 0.88rem; }
@media (max-width: 820px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

/* ===== Feature Content (图文区块) ===== */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.feature-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.feature-img img { width: 100%; border-radius: var(--radius-lg); }
.feature-text h3 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin-bottom: 16px; }
.feature-text p { color: var(--text-muted); font-size: 1rem; line-height: 1.8; }
.feature-list { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.feature-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.95rem; color: var(--text-body); }
.feature-list li i { color: var(--accent); margin-top: 4px; flex-shrink: 0; }
@media (max-width: 820px) { .feature-grid { grid-template-columns: 1fr; gap: 28px; } .feature-img { order: -1; } }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-color); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary-lighter); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  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);
}
.faq-question:hover { background: rgba(45,109,168,0.04); }
.faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 0.9rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px; color: var(--text-muted); font-size: 0.95rem; line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 400px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
  position: relative; overflow: hidden; text-align: center;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  opacity: 0.06; pointer-events: none;
}
.cta-content { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-content h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.cta-content p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin: 16px 0 28px; }
.cta-content .btn-primary { font-size: 1.1rem; padding: 16px 40px; }
.cta-content .btn-primary:hover { box-shadow: 0 10px 40px rgba(232,155,42,0.4); }

/* ===== Footer ===== */
footer {
  background: var(--bg-dark); color: rgba(255,255,255,0.7);
  padding: 48px 0 24px; border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .logo { font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 340px; line-height: 1.7; }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.6);
  font-size: 1rem; transition: var(--transition);
}
.footer-social a:hover { background: var(--accent); color: #111; transform: translateY(-2px); }
.footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a { color: rgba(255,255,255,0.5); font-size: 0.88rem; transition: var(--transition); }
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ===== Responsive helpers ===== */
@media (max-width: 768px) { .section { padding: 56px 0; } .section-title { margin-bottom: 32px; } }
@media (max-width: 520px) { .hero { padding: 100px 16px 60px; } .hero-actions { flex-direction: column; align-items: center; } .hero-actions .btn { width: 100%; max-width: 280px; } }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #f0b429;
            --accent-light: #f7d06a;
            --accent-dark: #d49a1a;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-soft: #eef1f6;
            --text-primary: #1a2332;
            --text-body: #3d4a5c;
            --text-muted: #7a879a;
            --text-light: #b0bcca;
            --text-white: #f0f4f8;
            --border: #e2e7ef;
            --border-light: #f0f2f6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px rgba(26, 35, 50, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 35, 50, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 35, 50, 0.12);
            --shadow-xl: 0 24px 64px rgba(26, 35, 50, 0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 72px;
            --max-width: 1200px;
            --gap: 32px;
            --gap-sm: 20px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg-body);
            min-height: 100vh;
            padding-top: var(--nav-height);
        }

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

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

        a:hover {
            color: var(--primary-light);
        }

        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 var(--gap-sm);
            }
            :root {
                --gap: 20px;
            }
        }

        /* ===== Glass Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(18px) saturate(1.6);
            -webkit-backdrop-filter: blur(18px) saturate(1.6);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 1px 20px rgba(0, 0, 0, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.07);
            border-bottom-color: rgba(226, 231, 239, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }

        .logo span {
            font-weight: 400;
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-left: 2px;
        }

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

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }

        .nav-list a:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }

        .nav-list a.active {
            color: var(--primary-dark);
            background: rgba(30, 58, 95, 0.10);
            font-weight: 600;
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(30, 58, 95, 0.20);
        }

        .nav-list a.nav-cta i {
            opacity: 1;
        }

        .nav-list a.nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(30, 58, 95, 0.25);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }

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

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

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

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 10px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                justify-content: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav-list a.active::after {
                bottom: 4px;
                width: 28px;
            }
            .nav-list a.nav-cta {
                margin-top: 6px;
            }
        }

        @media (max-width: 480px) {
            .logo {
                font-size: 1.1rem;
            }
            .logo span {
                display: none;
            }
            .header-inner {
                padding: 0 14px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            padding: 60px 20px 50px;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(240, 180, 41, 0.08) 0%, transparent 70%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .banner-content .banner-tag {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(240, 180, 41, 0.18);
            color: var(--accent-light);
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(240, 180, 41, 0.15);
            margin-bottom: 18px;
        }

        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.12);
        }

        .banner-content h1 i {
            color: var(--accent);
            margin-right: 8px;
        }

        .banner-content p {
            font-size: 1.15rem;
            color: rgba(240, 248, 255, 0.85);
            line-height: 1.8;
            max-width: 640px;
            margin: 0 auto 24px;
        }

        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            color: rgba(240, 248, 255, 0.70);
            font-size: 0.9rem;
        }

        .banner-meta i {
            color: var(--accent);
            margin-right: 6px;
        }

        @media (max-width: 768px) {
            .page-banner {
                min-height: 240px;
                padding: 48px 16px 36px;
            }
            .banner-content h1 {
                font-size: 1.9rem;
            }
            .banner-content p {
                font-size: 0.98rem;
            }
            .banner-meta {
                gap: 14px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 480px) {
            .banner-content h1 {
                font-size: 1.6rem;
            }
            .banner-content .banner-tag {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }

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

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

        .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;
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .section-header .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header .section-subtitle {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 480px) {
            .section {
                padding: 36px 0;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--gap);
        }

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

        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid.cols-2,
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .card-grid:not(.cols-2):not(.cols-3):not(.cols-4) {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== Content Card ===== */
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 58, 95, 0.10);
        }

        .content-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-soft);
        }

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

        .content-card:hover .card-img img {
            transform: scale(1.04);
        }

        .content-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            background: rgba(30, 58, 95, 0.85);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 40px;
            letter-spacing: 0.3px;
        }

        .content-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

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

        .content-card .card-body h3 a {
            color: var(--text-primary);
        }

        .content-card .card-body h3 a:hover {
            color: var(--primary);
        }

        .content-card .card-body p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .content-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .content-card .card-footer i {
            margin-right: 4px;
            opacity: 0.7;
        }

        .content-card .card-footer .card-meta {
            display: flex;
            gap: 16px;
        }

        .content-card .card-footer .card-link {
            color: var(--primary);
            font-weight: 600;
            transition: all var(--transition);
        }

        .content-card .card-footer .card-link:hover {
            color: var(--primary-light);
            gap: 6px;
        }

        @media (max-width: 480px) {
            .content-card .card-body {
                padding: 16px 18px 18px;
            }
            .content-card .card-body h3 {
                font-size: 1rem;
            }
        }

        /* ===== Guide List / 攻略列表 ===== */
        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .guide-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-card);
            padding: 18px 22px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .guide-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 58, 95, 0.12);
        }

        .guide-item .guide-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }

        .guide-item .guide-content {
            flex: 1;
        }

        .guide-item .guide-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .guide-item .guide-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .guide-item .guide-arrow {
            flex-shrink: 0;
            color: var(--text-light);
            font-size: 1.1rem;
            transition: all var(--transition);
        }

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

        @media (max-width: 480px) {
            .guide-item {
                padding: 14px 16px;
                gap: 12px;
            }
            .guide-item .guide-icon {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .guide-item .guide-content h4 {
                font-size: 0.92rem;
            }
        }

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

        .stat-item {
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(4px);
        }

        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
        }

        .stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(240, 248, 255, 0.75);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 18px 12px;
            }
            .stat-item .stat-number {
                font-size: 1.5rem;
            }
        }

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

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

        .faq-item:hover {
            border-color: rgba(30, 58, 95, 0.10);
            box-shadow: var(--shadow-sm);
        }

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

        .faq-question:hover {
            background: rgba(30, 58, 95, 0.02);
        }

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

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.8;
        }

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

        @media (max-width: 480px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-xl);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-box .cta-content {
            position: relative;
            z-index: 2;
        }

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

        .cta-box p {
            font-size: 1.05rem;
            color: rgba(240, 248, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-box .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            box-shadow: 0 4px 20px rgba(240, 180, 41, 0.35);
            transition: all var(--transition);
        }

        .cta-box .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(240, 180, 41, 0.40);
            color: var(--primary-dark);
        }

        .cta-box .cta-btn i {
            transition: transform var(--transition);
        }

        .cta-box .cta-btn:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .cta-box .cta-btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 480px) {
            .cta-box {
                padding: 30px 18px;
                border-radius: var(--radius-md);
            }
            .cta-box h2 {
                font-size: 1.25rem;
            }
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(240, 248, 255, 0.75);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.4rem;
            margin-bottom: 14px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(240, 248, 255, 0.60);
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 18px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(240, 248, 255, 0.70);
            font-size: 1.1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li a {
            color: rgba(240, 248, 255, 0.60);
            font-size: 0.9rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            transform: translateX(3px);
        }

        .footer-bottom {
            padding: 20px 0 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(240, 248, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(240, 248, 255, 0.55);
        }

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

        .footer-bottom p {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 6px 16px;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom p {
                flex-direction: column;
                gap: 4px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb i {
            font-size: 0.7rem;
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* ===== Category Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-list a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 40px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .tag-list a:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .tag-list a i {
            color: var(--accent);
            font-size: 0.8rem;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 520px) {
            .breadcrumb {
                font-size: 0.78rem;
                gap: 4px;
            }
            .tag-list a {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-lg);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: all var(--transition);
            z-index: 999;
            border: none;
        }

        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .back-top:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
        }

        @media (max-width: 480px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #f8fafc;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 4px 24px rgba(15,23,42,0.08);
  --shadow-lg: 0 12px 48px rgba(15,23,42,0.12);
  --shadow-glow: 0 0 30px rgba(245,158,11,0.15);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --nav-height: 72px;
  --max-width: 1200px;
}

/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--accent-dark);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
button,.btn{cursor:pointer;font-family:inherit}
input,textarea,select{font-family:inherit;font-size:1rem}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--bg-dark);color:var(--text-white)}
.section-title{font-size:2rem;margin-bottom:0.5rem;text-align:center}
.section-subtitle{font-size:1.1rem;color:var(--text-light);text-align:center;max-width:680px;margin:0 auto 48px}
.section-dark .section-title{color:var(--text-white)}
.section-dark .section-subtitle{color:rgba(248,250,252,0.7)}
.tag{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:600;background:rgba(245,158,11,0.12);color:var(--accent-dark);transition:var(--transition)}
.tag:hover{background:var(--accent);color:#fff}
.badge{display:inline-block;padding:2px 12px;border-radius:50px;font-size:0.75rem;font-weight:600;background:var(--accent);color:#fff}

/* ===== 导航 ===== */
header{position:fixed;top:0;left:0;width:100%;z-index:1000;height:var(--nav-height);transition:background var(--transition),box-shadow var(--transition);background:rgba(15,23,42,0.72);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid rgba(255,255,255,0.06)}
header.scrolled{background:rgba(15,23,42,0.96);box-shadow:0 4px 30px rgba(0,0,0,0.3)}
nav{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 24px;max-width:var(--max-width);margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--text-white);letter-spacing:-0.5px}
.logo i{color:var(--accent);font-size:1.5rem}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-list a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:50px;font-size:0.92rem;font-weight:500;color:rgba(248,250,252,0.75);transition:var(--transition);position:relative}
.nav-list a:hover,.nav-list a.active{color:var(--text-white);background:rgba(255,255,255,0.08)}
.nav-list a.active{background:rgba(245,158,11,0.15);color:var(--accent-light)}
.nav-list a.nav-cta{background:var(--accent);color:#0f172a;font-weight:700;padding:8px 22px;box-shadow:0 4px 16px rgba(245,158,11,0.3)}
.nav-list a.nav-cta:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 6px 24px rgba(245,158,11,0.4)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:8px;cursor:pointer}
.nav-toggle span{display:block;width:26px;height:2.5px;background:var(--text-white);border-radius:4px;transition:var(--transition)}

/* ===== 文章 Hero ===== */
.article-hero{position:relative;padding:140px 0 80px;background:var(--bg-dark);overflow:hidden;min-height:420px;display:flex;align-items:center}
.article-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.3;z-index:0}
.article-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,0.88) 0%,rgba(15,23,42,0.4) 100%);z-index:1}
.article-hero .container{position:relative;z-index:2;text-align:center}
.article-hero .breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:20px;font-size:0.9rem;color:rgba(248,250,252,0.6)}
.article-hero .breadcrumb a{color:rgba(248,250,252,0.7)}
.article-hero .breadcrumb a:hover{color:var(--accent-light)}
.article-hero .breadcrumb span{color:rgba(248,250,252,0.4)}
.article-hero .hero-tag{display:inline-block;padding:6px 20px;border-radius:50px;font-size:0.85rem;font-weight:600;background:rgba(245,158,11,0.18);color:var(--accent-light);margin-bottom:20px;letter-spacing:0.5px}
.article-hero h1{font-size:2.8rem;font-weight:800;color:var(--text-white);max-width:860px;margin:0 auto 16px;line-height:1.25;letter-spacing:-0.5px}
.article-hero .hero-meta{display:flex;align-items:center;justify-content:center;gap:24px;font-size:0.95rem;color:rgba(248,250,252,0.65)}
.article-hero .hero-meta i{margin-right:6px;color:var(--accent)}

/* ===== 文章正文 ===== */
.article-main{padding:60px 0 80px}
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start}
.article-content{background:#fff;border-radius:var(--radius);padding:48px;box-shadow:var(--shadow);border:1px solid var(--border)}
.article-content .content-area{font-size:1.05rem;line-height:1.85;color:var(--text)}
.article-content .content-area p{margin-bottom:1.4em}
.article-content .content-area h2{font-size:1.6rem;margin:1.8em 0 0.6em;color:var(--primary)}
.article-content .content-area h3{font-size:1.3rem;margin:1.4em 0 0.5em;color:var(--primary-light)}
.article-content .content-area ul,.article-content .content-area ol{margin-bottom:1.4em;padding-left:1.8em}
.article-content .content-area li{margin-bottom:0.5em;list-style:disc}
.article-content .content-area blockquote{border-left:4px solid var(--accent);padding:16px 24px;margin:1.4em 0;background:rgba(245,158,11,0.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic}
.article-content .content-area img{border-radius:var(--radius-sm);margin:1.5em 0;width:100%}
.article-content .content-area a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:2px}
.article-content .content-area a:hover{color:var(--accent)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding-top:28px;border-top:1px solid var(--border)}
.article-tags .tag-label{font-weight:600;color:var(--text-light);font-size:0.9rem;display:flex;align-items:center;gap:6px}

/* ===== 侧边栏 ===== */
.article-sidebar{display:flex;flex-direction:column;gap:28px}
.sidebar-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border)}
.sidebar-card h3{font-size:1.1rem;margin-bottom:16px;display:flex;align-items:center;gap:8px;color:var(--primary)}
.sidebar-card h3 i{color:var(--accent)}
.sidebar-card p{font-size:0.95rem;color:var(--text-light);margin-bottom:16px;line-height:1.6}
.sidebar-card .btn{width:100%;text-align:center}
.sidebar-list li{padding:10px 0;border-bottom:1px solid var(--border);font-size:0.92rem}
.sidebar-list li:last-child{border-bottom:none}
.sidebar-list a{color:var(--text);display:flex;align-items:center;gap:8px;transition:var(--transition)}
.sidebar-list a:hover{color:var(--accent-dark);padding-left:4px}
.sidebar-list a i{color:var(--accent);font-size:0.8rem}

/* ===== 文章导航（上下篇） ===== */
.article-nav{margin-top:40px;display:grid;grid-template-columns:1fr 1fr;gap:20px}
.article-nav a{display:flex;flex-direction:column;padding:20px 24px;border-radius:var(--radius);border:1px solid var(--border);background:#fff;transition:var(--transition);box-shadow:var(--shadow)}
.article-nav a:hover{border-color:var(--accent);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.article-nav .nav-label{font-size:0.8rem;color:var(--text-light);margin-bottom:4px;display:flex;align-items:center;gap:6px}
.article-nav .nav-title{font-weight:600;font-size:0.95rem;color:var(--text)}
.article-nav a:hover .nav-title{color:var(--accent-dark)}
.article-nav .nav-next{text-align:right}

/* ===== 相关推荐 ===== */
.related-section{background:var(--bg-alt);padding:80px 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.related-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--transition);display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(245,158,11,0.2)}
.related-card .card-img{height:200px;background:var(--bg-alt);overflow:hidden;position:relative}
.related-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s}
.related-card:hover .card-img img{transform:scale(1.05)}
.related-card .card-body{padding:20px 24px 24px;flex:1;display:flex;flex-direction:column}
.related-card .card-body .tag{align-self:flex-start;margin-bottom:10px}
.related-card .card-body h4{font-size:1.05rem;margin-bottom:8px;line-height:1.4}
.related-card .card-body h4 a{color:var(--text)}
.related-card .card-body h4 a:hover{color:var(--accent-dark)}
.related-card .card-body p{font-size:0.88rem;color:var(--text-light);margin-bottom:12px;flex:1;line-height:1.6}
.related-card .card-body .card-meta{font-size:0.8rem;color:var(--text-light);display:flex;align-items:center;gap:12px}

/* ===== CTA ===== */
.cta-section{background:var(--bg-dark);position:relative;overflow:hidden;padding:80px 0}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.08;z-index:0}
.cta-section .container{position:relative;z-index:1;text-align:center}
.cta-section h2{color:var(--text-white);font-size:2.2rem;margin-bottom:16px}
.cta-section p{color:rgba(248,250,252,0.7);font-size:1.1rem;max-width:600px;margin:0 auto 32px}
.cta-section .btn-group{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:50px;font-weight:600;font-size:1rem;border:none;transition:var(--transition);text-decoration:none;line-height:1}
.btn-primary{background:var(--accent);color:#0f172a;box-shadow:0 4px 16px rgba(245,158,11,0.3)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(245,158,11,0.4);color:#0f172a}
.btn-outline{background:transparent;border:2px solid rgba(248,250,252,0.25);color:var(--text-white)}
.btn-outline:hover{background:rgba(255,255,255,0.08);border-color:var(--accent);color:var(--accent-light);transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:0.9rem}

/* ===== Footer ===== */
footer{background:var(--primary);color:rgba(248,250,252,0.7);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,0.06)}
.footer-brand .logo{color:var(--text-white);font-size:1.3rem;margin-bottom:16px}
.footer-brand p{font-size:0.92rem;line-height:1.7;max-width:360px;margin-bottom:20px;color:rgba(248,250,252,0.6)}
.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(255,255,255,0.06);color:rgba(248,250,252,0.6);transition:var(--transition);font-size:1.1rem}
.footer-social a:hover{background:var(--accent);color:#0f172a;transform:translateY(-2px)}
.footer-col h4{color:var(--text-white);font-size:1rem;margin-bottom:18px;font-weight:600}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:rgba(248,250,252,0.55);font-size:0.9rem;transition:var(--transition);display:flex;align-items:center;gap:6px}
.footer-col ul a:hover{color:var(--accent-light);padding-left:4px}
.footer-bottom{padding:24px 0;text-align:center;font-size:0.85rem;color:rgba(248,250,252,0.4)}
.footer-bottom a{color:rgba(248,250,252,0.5)}
.footer-bottom a:hover{color:var(--accent-light)}

/* ===== 404 / 未找到 ===== */
.not-found{text-align:center;padding:100px 20px;min-height:50vh;display:flex;flex-direction:column;align-items:center;justify-content:center}
.not-found i{font-size:4rem;color:var(--accent);margin-bottom:24px;opacity:0.6}
.not-found h2{font-size:2rem;margin-bottom:12px}
.not-found p{color:var(--text-light);margin-bottom:24px;font-size:1.1rem}
.not-found .btn{margin-top:8px}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .article-layout{grid-template-columns:1fr}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-list{position:fixed;top:var(--nav-height);left:0;width:100%;background:rgba(15,23,42,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:20px 24px 28px;gap:4px;transform:translateY(-120%);opacity:0;transition:var(--transition);border-bottom:1px solid rgba(255,255,255,0.06);border-radius:0 0 var(--radius) var(--radius);pointer-events:none}
  .nav-list.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-list a{width:100%;padding:12px 18px;justify-content:flex-start;font-size:1rem}
  .nav-toggle{display:flex}
  .article-hero h1{font-size:1.9rem}
  .article-hero{padding:120px 0 60px;min-height:320px}
  .article-content{padding:28px 20px}
  .section{padding:56px 0}
  .section-title{font-size:1.6rem}
  .related-grid{grid-template-columns:1fr}
  .article-nav{grid-template-columns:1fr;gap:12px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cta-section h2{font-size:1.7rem}
}
@media(max-width:520px){
  .article-hero h1{font-size:1.5rem}
  .article-hero .hero-meta{flex-wrap:wrap;gap:12px;font-size:0.85rem}
  .container{padding:0 16px}
  .article-content{padding:20px 16px}
  .related-card .card-img{height:170px}
  .btn{padding:12px 24px;font-size:0.92rem}
  .section-title{font-size:1.4rem}
  .section-subtitle{font-size:0.95rem}
}