/* roulang page: index */
:root{
  --bg:#0b0e17;--bg2:#0f1524;--bg3:#131b2e;
  --card:rgba(255,255,255,.035);--card-hover:rgba(255,255,255,.07);
  --cyan:#00e5ff;--pink:#ff3d8a;--purple:#8b5cf6;
  --text:#e8ecf4;--text2:#9aa8bd;--text3:#64748b;
  --border:rgba(255,255,255,.07);--border-light:rgba(255,255,255,.13);
  --r-sm:10px;--r-md:16px;--r-lg:24px;
  --shadow-sm:0 2px 16px rgba(0,0,0,.3);
  --shadow-md:0 10px 36px rgba(0,0,0,.45);
  --glow:0 0 44px rgba(0,229,255,.14);
  --t:.3s cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:var(--t)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
::selection{background:rgba(0,229,255,.25);color:#fff}

/* Header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,14,23,.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;height:72px;gap:40px}
.logo{
  font-size:24px;font-weight:800;letter-spacing:1px;color:#fff;
  display:flex;align-items:center;gap:2px;
}
.logo span{color:var(--cyan);text-shadow:0 0 20px rgba(0,229,255,.5)}
.main-nav{display:flex;align-items:center;gap:8px;flex:1}
.nav-link{
  padding:8px 18px;border-radius:999px;font-size:15px;font-weight:500;color:var(--text2);
  position:relative;transition:var(--t);
}
.nav-link:hover{color:var(--cyan)}
.nav-link.active{
  color:var(--cyan);background:rgba(0,229,255,.08);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.28),0 0 24px rgba(0,229,255,.08);
}
.nav-link.active::after{
  content:"";position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
  width:20px;height:3px;border-radius:3px;background:var(--cyan);
  box-shadow:0 0 12px rgba(0,229,255,.7);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.btn-nav{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 22px;border-radius:999px;font-size:14px;font-weight:600;color:#0b0e17;
  background:linear-gradient(135deg,var(--cyan),#00b8d4);
  box-shadow:0 0 24px rgba(0,229,255,.25);transition:var(--t);
}
.btn-nav:hover{transform:translateY(-2px);box-shadow:0 4px 32px rgba(0,229,255,.4)}
.mobile-toggle{display:none;font-size:26px;color:var(--text);padding:6px 8px;border-radius:8px}
.mobile-toggle:hover{background:rgba(255,255,255,.06)}

/* Hero */
.hero{
  position:relative;min-height:680px;display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;background-attachment:fixed;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(10,14,23,.94) 30%,rgba(10,14,23,.7) 60%,rgba(0,229,255,.06) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 75% 40%,rgba(0,229,255,.08),transparent 60%);
}
.hero-inner{position:relative;z-index:2;padding:90px 0 80px;max-width:720px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:999px;
  background:rgba(0,229,255,.09);border:1px solid rgba(0,229,255,.25);
  color:var(--cyan);font-size:13px;font-weight:600;letter-spacing:1px;margin-bottom:24px;
  box-shadow:0 0 30px rgba(0,229,255,.12);
}
.hero-badge::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.hero h1{
  font-size:clamp(34px,5vw,54px);line-height:1.2;color:#fff;font-weight:800;margin-bottom:20px;
  letter-spacing:2px;
}
.hero h1 em{
  font-style:normal;color:var(--cyan);text-shadow:0 0 40px rgba(0,229,255,.45);
}
.hero p{
  font-size:17px;color:var(--text2);line-height:1.9;margin-bottom:36px;max-width:560px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 34px;border-radius:999px;font-size:15px;font-weight:700;color:#0b0e17;
  background:linear-gradient(135deg,var(--cyan),#00c8e8);
  box-shadow:0 4px 30px rgba(0,229,255,.3);transition:var(--t);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 40px rgba(0,229,255,.45)}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 34px;border-radius:999px;font-size:15px;font-weight:600;color:var(--text);
  background:rgba(255,255,255,.05);border:1px solid var(--border-light);backdrop-filter:blur(8px);
  transition:var(--t);
}
.btn-secondary:hover{border-color:rgba(255,255,255,.3);background:rgba(255,255,255,.09);transform:translateY(-2px)}
.hero-meta{
  display:flex;gap:32px;margin-top:52px;padding-top:28px;border-top:1px solid var(--border);
}
.hero-meta-item{display:flex;flex-direction:column;gap:2px}
.hero-meta-item strong{font-size:26px;font-weight:800;color:#fff}
.hero-meta-item strong i{font-style:normal;color:var(--cyan);font-size:16px}
.hero-meta-item span{font-size:13px;color:var(--text3)}

/* Section general */
.section{padding:88px 0;position:relative}
.section-alt{background:var(--bg2)}
.section-header{text-align:center;margin-bottom:52px}
.section-tag{
  display:inline-block;padding:5px 14px;border-radius:999px;font-size:12px;font-weight:700;
  letter-spacing:2px;color:var(--cyan);background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.22);margin-bottom:14px;
}
.section-header h2{
  font-size:clamp(26px,3.2vw,36px);font-weight:800;color:#fff;margin-bottom:10px;letter-spacing:1px;
}
.section-header p{color:var(--text2);font-size:15px;max-width:560px;margin:0 auto}

/* Feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);
  padding:32px 28px;transition:var(--t);position:relative;overflow:hidden;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--pink));opacity:0;transition:var(--t);
}
.feature-card:hover{
  transform:translateY(-6px);background:var(--card-hover);
  border-color:rgba(0,229,255,.25);box-shadow:var(--glow);
}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(0,229,255,.15),rgba(255,61,138,.1));
  border:1px solid rgba(0,229,255,.15);
}
.feature-card h3{font-size:18px;color:#fff;margin-bottom:10px;font-weight:700}
.feature-card p{font-size:14px;color:var(--text2);line-height:1.7}

/* Category showcase */
.showcase-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.showcase-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-md);
  border:1px solid var(--border);
}
.showcase-media img{
  width:100%;height:100%;object-fit:cover;min-height:380px;transition:var(--t);
}
.showcase-media:hover img{transform:scale(1.04)}
.showcase-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,229,255,.08),transparent);
}
.showcase-content{padding:20px 0}
.showcase-content .section-tag{margin-bottom:16px}
.showcase-content h2{font-size:clamp(24px,2.6vw,32px);color:#fff;line-height:1.3;margin-bottom:16px}
.showcase-content p{color:var(--text2);font-size:15px;line-height:1.85;margin-bottom:20px}
.showcase-list{margin:24px 0;display:flex;flex-direction:column;gap:12px}
.showcase-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text);
  padding:10px 16px;background:var(--card);border-radius:var(--r-sm);border:1px solid var(--border);
}
.showcase-list li::before{
  content:"✓";color:var(--cyan);font-weight:800;flex-shrink:0;margin-top:1px;
}
.showcase-list li:hover{border-color:rgba(0,229,255,.25)}

/* Info section */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.info-card{
  display:block;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-md);padding:28px;transition:var(--t);position:relative;
}
.info-card:hover{
  transform:translateY(-5px);background:var(--card-hover);
  border-color:rgba(0,229,255,.3);box-shadow:var(--glow);
}
.info-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.info-category{
  display:inline-block;padding:3px 12px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--pink);background:rgba(255,61,138,.1);border:1px solid rgba(255,61,138,.22);
}
.info-card time{font-size:13px;color:var(--text3)}
.info-card h3{font-size:17px;color:#fff;margin-bottom:8px;line-height:1.4;font-weight:700}
.info-card p{font-size:14px;color:var(--text2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
.info-more{font-size:13px;color:var(--cyan);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.info-more::after{content:"→";transition:var(--t)}
.info-card:hover .info-more::after{transform:translateX(4px)}
.empty-tip{
  grid-column:1/-1;text-align:center;padding:48px 24px;color:var(--text3);
  background:var(--card);border:1px dashed var(--border);border-radius:var(--r-md);font-size:15px;
}

/* Stats */
.stats-section{
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;position:relative;
}
.stats-section::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(10,14,23,.95),rgba(19,27,46,.88));
}
.stats-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-item{
  text-align:center;padding:40px 20px;background:rgba(255,255,255,.03);
  border:1px solid var(--border);border-radius:var(--r-md);backdrop-filter:blur(8px);
  transition:var(--t);
}
.stat-item:hover{border-color:rgba(0,229,255,.3);box-shadow:var(--glow);transform:translateY(-3px)}
.stat-num{font-size:40px;font-weight:800;color:var(--cyan);text-shadow:0 0 30px rgba(0,229,255,.4)}
.stat-num sup{font-size:18px}
.stat-label{font-size:14px;color:var(--text2);margin-top:6px}

/* Process */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.step-card{
  text-align:center;padding:36px 24px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--r-md);position:relative;transition:var(--t);
}
.step-card:hover{transform:translateY(-5px);border-color:rgba(0,229,255,.3);box-shadow:var(--glow)}
.step-num{
  width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(0,229,255,.2),rgba(255,61,138,.15));
  border:1px solid rgba(0,229,255,.25);color:var(--cyan);font-size:18px;font-weight:800;
  margin:0 auto 18px;box-shadow:0 0 20px rgba(0,229,255,.1);
}
.step-card h3{font-size:16px;color:#fff;margin-bottom:8px}
.step-card p{font-size:13px;color:var(--text2);line-height:1.65}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);
  overflow:hidden;transition:var(--t);
}
.faq-item:hover{border-color:rgba(0,229,255,.2)}
.faq-q{
  padding:20px 24px;font-size:16px;font-weight:600;color:#fff;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;user-select:none;
}
.faq-q::after{
  content:"+";font-size:24px;color:var(--cyan);font-weight:300;transition:var(--t);
}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-item.open .faq-a{max-height:500px}
.faq-a p{padding:0 24px 22px;color:var(--text2);font-size:14px;line-height:1.85}

/* CTA */
.cta-section{
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;position:relative;padding:96px 0;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(10,14,23,.95),rgba(0,229,255,.06));
}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:640px;margin:0 auto}
.cta-inner h2{font-size:clamp(26px,3vw,38px);color:#fff;margin-bottom:16px;letter-spacing:1px}
.cta-inner p{color:var(--text2);font-size:16px;margin-bottom:34px;line-height:1.8}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--text2);font-size:14px;line-height:1.75;max-width:280px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--text2);font-size:14px}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  border-top:1px solid var(--border);padding:24px 0;text-align:center;
  color:var(--text3);font-size:13px;
}
.footer-bottom span{margin:0 8px}

/* Responsive */
@media(max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .showcase-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .site-header{height:auto;min-height:64px}
  .header-inner{height:64px;gap:16px}
  .main-nav{
    display:none;position:absolute;top:64px;left:0;right:0;
    background:rgba(11,14,23,.98);flex-direction:column;padding:16px 24px 24px;
    border-bottom:1px solid var(--border);gap:6px;
  }
  .main-nav.open{display:flex}
  .nav-link{padding:12px 16px;font-size:16px;width:100%}
  .nav-link.active::after{content:none}
  .mobile-toggle{display:block}
  .header-actions{display:none}
  .hero{min-height:560px;background-attachment:scroll}
  .hero-inner{padding:60px 0}
  .info-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
}
@media(max-width:520px){
  .feature-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-meta{flex-wrap:wrap;gap:20px}
  .container{padding:0 20px}
  .showcase-media img{min-height:260px}
}

/* roulang page: article */
:root {
    --bg-primary: #0b0f1a;
    --bg-secondary: #101625;
    --bg-card: #161d31;
    --bg-card-hover: #1b243c;
    --bg-input: #1a2235;
    --primary: #a78bfa;
    --primary-deep: #7c3aed;
    --accent: #22d3ee;
    --accent-deep: #0ea5b7;
    --text-primary: #f1f5f9;
    --text-secondary: #a5b1c8;
    --text-muted: #64748b;
    --border: #233045;
    --border-light: #30415e;
    --radius: 18px;
    --radius-sm: 10px;
    --radius-lg: 28px;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.22);
    --shadow-accent: 0 0 30px rgba(34, 211, 238, 0.15);
    --transition: 0.3s ease;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--primary);
}
ul, ol {
    list-style-position: inside;
}
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}
input {
    font-family: inherit;
}
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 15, 26, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}
.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 2px;
    white-space: nowrap;
    transition: opacity var(--transition);
}
.logo span {
    color: var(--primary);
    text-shadow: 0 0 18px rgba(167, 139, 250, 0.6);
}
.logo:hover {
    opacity: 0.85;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link {
    position: relative;
    padding: 8px 18px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 999px;
    transition: all var(--transition);
}
.nav-link:hover {
    color: var(--text-primary);
    background: rgba(167, 139, 250, 0.1);
}
.nav-link.active {
    color: var(--primary);
    background: rgba(167, 139, 250, 0.12);
    box-shadow: inset 0 0 0 1px rgba(167, 139, 250, 0.25), 0 0 20px rgba(124, 58, 237, 0.15);
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    background: linear-gradient(135deg, var(--primary-deep), var(--accent-deep));
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: 999px;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
    transition: all var(--transition);
}
.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(124, 58, 237, 0.45);
    color: #fff;
}
.mobile-toggle {
    display: none;
    font-size: 26px;
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: 8px;
    transition: background var(--transition);
}
.mobile-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
}

.article-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 92px 0 76px;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}
.article-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11, 15, 26, 0.72) 0%, rgba(11, 15, 26, 0.55) 50%, var(--bg-primary) 100%);
    z-index: 1;
}
.article-hero::after {
    content: "";
    position: absolute;
    top: -60%;
    right: -10%;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.2) 0%, transparent 70%);
    z-index: 0;
}
.article-hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
}
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 22px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--text-secondary);
}
.breadcrumb a:hover {
    color: var(--primary);
}
.breadcrumb-sep {
    color: var(--border-light);
}
.breadcrumb-current {
    color: var(--text-muted);
}
.article-title {
    font-size: clamp(30px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: 1px;
    margin-bottom: 20px;
    text-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
}
.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--text-secondary);
}
.article-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 16px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(34, 211, 238, 0.18));
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 999px;
    color: var(--primary);
    font-weight: 600;
    font-size: 13px;
}
.article-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-read {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.article-main {
    padding: 72px 0;
    background: var(--bg-primary);
}
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 48px;
    align-items: start;
}
.article-content {
    min-width: 0;
}
.article-body {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-primary);
}
.article-body p {
    margin-bottom: 1.6em;
}
.article-body h2 {
    font-size: 26px;
    font-weight: 700;
    margin: 2em 0 0.8em;
    padding-left: 16px;
    border-left: 3px solid var(--primary);
    color: var(--text-primary);
    line-height: 1.4;
}
.article-body h3 {
    font-size: 21px;
    font-weight: 600;
    margin: 1.8em 0 0.6em;
    color: var(--accent);
    line-height: 1.4;
}
.article-body ul,
.article-body ol {
    margin: 0 0 1.6em;
    padding-left: 1.4em;
}
.article-body ul li,
.article-body ol li {
    margin: 0.5em 0;
    padding-left: 4px;
}
.article-body blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(34, 211, 238, 0.07);
    padding: 1em 1.4em;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.6em 0;
    color: var(--text-secondary);
}
.article-body img {
    border-radius: var(--radius);
    max-width: 100%;
    border: 1px solid var(--border);
    margin: 1.2em 0;
}
.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body a:hover {
    color: var(--primary);
}
.article-body code {
    background: rgba(167, 139, 250, 0.1);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
    color: var(--primary);
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 40px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.2);
    border-radius: 999px;
    color: var(--text-secondary);
    font-size: 13px;
    transition: all var(--transition);
}
.tag:hover {
    color: var(--primary);
    border-color: rgba(167, 139, 250, 0.5);
    background: rgba(167, 139, 250, 0.16);
}
.article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 36px;
    gap: 16px;
    flex-wrap: wrap;
}
.article-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all var(--transition);
}
.article-nav-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.12);
}
.not-found {
    text-align: center;
    padding: 80px 32px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}
.not-found h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.not-found p {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 16px;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--primary-deep), var(--accent-deep));
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border-radius: 999px;
    box-shadow: 0 4px 24px rgba(124, 58, 237, 0.3);
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.45);
    color: #fff;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 999px;
    background: rgba(167, 139, 250, 0.06);
    transition: all var(--transition);
}
.btn-outline:hover {
    background: rgba(167, 139, 250, 0.15);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.2);
    color: var(--primary);
    transform: translateY(-2px);
}

.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 96px;
}
.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: box-shadow var(--transition), border-color var(--transition);
}
.sidebar-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow);
}
.sidebar-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    position: relative;
}
.sidebar-title::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 48px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}
.sidebar-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sidebar-list li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all var(--transition);
}
.sidebar-list li a::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.5;
    transition: all var(--transition);
}
.sidebar-list li a:hover {
    background: rgba(167, 139, 250, 0.1);
    color: var(--primary);
    transform: translateX(4px);
}
.sidebar-list li a:hover::before {
    opacity: 1;
    box-shadow: 0 0 10px rgba(167, 139, 250, 0.6);
}
.sidebar-recommend {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px;
    border-radius: 12px;
    transition: all var(--transition);
    margin-bottom: 6px;
}
.sidebar-recommend:last-child {
    margin-bottom: 0;
}
.sidebar-recommend:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateX(4px);
}
.sidebar-recommend img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid var(--border);
}
.sidebar-recommend span {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
    transition: color var(--transition);
}
.sidebar-recommend:hover span {
    color: var(--primary);
}
.sidebar-text {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.related-section {
    padding: 80px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: clamp(26px, 4vw, 36px);
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.section-header p {
    color: var(--text-muted);
    font-size: 15px;
    max-width: 520px;
    margin: 0 auto;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
}
.related-card:hover {
    transform: translateY(-6px);
    border-color: rgba(167, 139, 250, 0.4);
    box-shadow: var(--shadow-glow);
}
.related-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--border);
    transition: transform 0.5s ease;
}
.related-card:hover img {
    transform: scale(1.03);
}
.related-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.related-card-tag {
    display: inline-flex;
    align-self: flex-start;
    padding: 4px 12px;
    background: rgba(34, 211, 238, 0.12);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 999px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
}
.related-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    transition: color var(--transition);
}
.related-card:hover h3 {
    color: var(--primary);
}
.related-card p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    flex: 1;
}

.faq-section {
    padding: 80px 0;
    background: var(--bg-primary);
}
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
}
.faq-item:hover {
    border-color: rgba(167, 139, 250, 0.3);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.faq-item h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.faq-item h3::before {
    content: "Q";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(34, 211, 238, 0.2));
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    padding-left: 38px;
}

.cta-section {
    padding: 64px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}
.cta-box {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.16), rgba(34, 211, 238, 0.1));
    border: 1px solid rgba(167, 139, 250, 0.25);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: "";
    position: absolute;
    top: -60%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(124, 58, 237, 0.2), transparent 70%);
    pointer-events: none;
}
.cta-box h2 {
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 800;
    margin-bottom: 14px;
    color: var(--text-primary);
}
.cta-box p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 30px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}
.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    transition: all var(--transition);
}
.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(34, 211, 238, 0.08);
    transform: translateY(-2px);
}

.site-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .logo {
    font-size: 26px;
    margin-bottom: 16px;
    display: inline-block;
}
.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
}
.footer-col h4 {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 1px;
}
.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 14px;
    transition: all var(--transition);
}
.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}
.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 22px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.footer-bottom span {
    color: var(--border-light);
}

@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 20px;
    }
    .sidebar-card {
        flex: 1;
        min-width: 260px;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}
@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(11, 15, 26, 0.98);
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.35s ease, opacity 0.35s ease;
        z-index: 999;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
    }
    .nav-link {
        padding: 14px 18px;
        border-radius: 10px;
        font-size: 15px;
    }
    .nav-link.active {
        background: rgba(167, 139, 250, 0.15);
    }
    .header-actions {
        margin-left: auto;
    }
    .btn-nav {
        padding: 8px 16px;
        font-size: 13px;
    }
    .mobile-toggle {
        display: block;
    }
    .article-hero {
        padding: 64px 0 48px;
    }
    .article-main {
        padding: 48px 0;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .cta-box {
        padding: 40px 24px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-brand p {
        max-width: 100%;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .header-inner {
        gap: 12px;
    }
    .header-actions .btn-nav {
        display: none;
    }
    .logo {
        font-size: 20px;
        letter-spacing: 1px;
    }
    .article-title {
        font-size: 26px;
        line-height: 1.35;
    }
    .breadcrumb {
        font-size: 13px;
    }
    .article-body {
        font-size: 16px;
    }
    .article-body h2 {
        font-size: 22px;
    }
    .article-body h3 {
        font-size: 19px;
    }
    .article-nav {
        flex-direction: column;
        align-items: stretch;
    }
    .article-nav-link {
        justify-content: center;
    }
    .related-card img {
        height: 160px;
    }
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn-primary,
    .btn-ghost {
        width: 100%;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 4px;
    }
    .footer-bottom span {
        display: none;
    }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
    :root {
      --bg-dark: #0a0e17;
      --bg-deep: #0d1322;
      --bg-panel: rgba(20, 27, 45, 0.72);
      --bg-panel-hover: rgba(28, 38, 62, 0.92);
      --primary: #22d3ee;
      --secondary: #a855f7;
      --gradient: linear-gradient(135deg, #22d3ee 0%, #a855f7 100%);
      --text-main: #e6edf3;
      --text-weak: #94a3b8;
      --border: rgba(139, 153, 187, 0.16);
      --radius-lg: 22px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
      --transition: all 0.25s ease;
      --container: 1180px;
      --header-h: 70px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
      background: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      display: block;
      border: 0;
    }

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

    button {
      font-family: inherit;
      border: none;
      background: none;
      cursor: pointer;
      color: inherit;
    }

    input,
    textarea {
      font-family: inherit;
    }

    ul,
    ol {
      list-style: none;
    }

    /* ========== 容器 ========== */
    .container {
      width: min(var(--container), 92%);
      margin: 0 auto;
    }

    /* ========== 按钮 ========== */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--gradient);
      color: #f8fafc;
      font-weight: 600;
      font-size: 15px;
      padding: 12px 26px;
      border-radius: 999px;
      box-shadow: 0 0 22px rgba(34, 211, 238, 0.35), 0 8px 26px rgba(168, 85, 247, 0.25);
      transition: var(--transition);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 34px rgba(34, 211, 238, 0.55), 0 14px 34px rgba(168, 85, 247, 0.4);
    }

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

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

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

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      background: rgba(255, 255, 255, 0.03);
      color: var(--text-main);
      padding: 10px 22px;
      border-radius: 999px;
      font-weight: 500;
      font-size: 14px;
      transition: var(--transition);
    }

    .btn-outline:hover {
      border-color: rgba(34, 211, 238, 0.6);
      background: rgba(34, 211, 238, 0.08);
      color: var(--primary);
    }

    /* ========== Header / 导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 14, 23, 0.82);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
    }

    .site-header::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -1px;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
      opacity: 0.7;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: var(--header-h);
      gap: 24px;
    }

    .logo {
      display: inline-flex;
      align-items: baseline;
      font-size: 24px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 1px;
      white-space: nowrap;
    }

    .logo span {
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-left: 2px;
    }

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

    .nav-link {
      position: relative;
      padding: 10px 18px;
      border-radius: 999px;
      font-size: 15px;
      color: var(--text-weak);
      font-weight: 500;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-link.active {
      color: #ffffff;
      background: rgba(34, 211, 238, 0.12);
      box-shadow: inset 0 -2px 0 var(--primary), 0 0 14px rgba(34, 211, 238, 0.25);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-left: auto;
    }

    .btn-nav {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--gradient);
      color: #fff;
      padding: 8px 20px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 0 16px rgba(34, 211, 238, 0.3);
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-nav:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 26px rgba(34, 211, 238, 0.5);
    }

    .mobile-toggle {
      display: none;
      font-size: 24px;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border);
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      transition: var(--transition);
    }

    .mobile-toggle:hover {
      color: var(--primary);
      border-color: rgba(34, 211, 238, 0.5);
    }

    /* ========== Banner / 页首横幅 ========== */
    .page-banner {
      position: relative;
      padding: 110px 0 90px;
      background:
        linear-gradient(135deg, rgba(10, 14, 23, 0.9), rgba(13, 19, 34, 0.7)),
        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      border-bottom: 1px solid var(--border);
    }

    .page-banner::before {
      content: "";
      position: absolute;
      top: -60px;
      right: 10%;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 65%);
      pointer-events: none;
    }

    .page-banner::after {
      content: "";
      position: absolute;
      bottom: -60px;
      left: 5%;
      width: 280px;
      height: 280px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.12), transparent 65%);
      pointer-events: none;
    }

    .banner-tag {
      display: inline-block;
      padding: 6px 18px;
      border-radius: 999px;
      background: rgba(34, 211, 238, 0.12);
      border: 1px solid rgba(34, 211, 238, 0.35);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 18px;
    }

    .page-banner h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #ffffff 30%, #a5f3fc 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .page-banner p {
      font-size: 18px;
      color: var(--text-weak);
      max-width: 560px;
      line-height: 1.8;
      margin-bottom: 26px;
    }

    .banner-crumb {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-weak);
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border);
      padding: 7px 18px;
      border-radius: 999px;
    }

    .banner-crumb a {
      color: var(--primary);
    }

    .crumb-sep {
      opacity: 0.5;
    }

    /* ========== 通用板块 ========== */
    .section-pad {
      padding: 90px 0;
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      color: var(--primary);
      background: rgba(34, 211, 238, 0.1);
      border: 1px solid rgba(34, 211, 238, 0.25);
      padding: 5px 16px;
      border-radius: 999px;
      margin-bottom: 14px;
    }

    .section-head h2 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #f1f5f9;
    }

    .section-head p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.8;
    }

    /* ========== 核心理念区块 ========== */
    .concept-section {
      background: var(--bg-dark);
      position: relative;
      padding: 96px 0;
    }

    .concept-section::before {
      content: "";
      position: absolute;
      top: 40px;
      left: -80px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.06), transparent 70%);
      pointer-events: none;
    }

    .concept-grid {
      display: grid;
      grid-template-columns: 1.05fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .concept-image img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
      object-fit: cover;
      width: 100%;
      transition: var(--transition);
    }

    .concept-image:hover img {
      transform: scale(1.01);
      box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 0 30px rgba(34, 211, 238, 0.1);
    }

    .concept-content h3 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 18px;
      color: #f1f5f9;
    }

    .concept-content p {
      color: var(--text-weak);
      font-size: 15px;
      line-height: 1.9;
      margin-bottom: 22px;
    }

    .check-list {
      margin: 20px 0 28px;
      display: grid;
      gap: 14px;
    }

    .check-list li {
      position: relative;
      padding-left: 34px;
      color: var(--text-main);
      font-size: 14px;
      line-height: 1.7;
    }

    .check-list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 3px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: rgba(34, 211, 238, 0.15);
      border: 1px solid rgba(34, 211, 238, 0.4);
    }

    .check-list li::after {
      content: "";
      position: absolute;
      left: 6px;
      top: 9px;
      width: 10px;
      height: 6px;
      border-left: 2px solid var(--primary);
      border-bottom: 2px solid var(--primary);
      transform: rotate(-45deg);
    }

    /* ========== 形态卡片 ========== */
    .patterns-section {
      background: var(--bg-deep);
      position: relative;
      padding: 96px 0;
      background:
        radial-gradient(ellipse at top left, rgba(34, 211, 238, 0.07), transparent 55%),
        radial-gradient(ellipse at bottom right, rgba(168, 85, 247, 0.07), transparent 55%),
        var(--bg-deep);
    }

    .pattern-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 26px;
    }

    .pattern-card {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .pattern-card:hover {
      transform: translateY(-8px);
      border-color: rgba(34, 211, 238, 0.4);
      box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4), 0 0 24px rgba(34, 211, 238, 0.12);
      background: var(--bg-panel-hover);
    }

    .pattern-media {
      position: relative;
      height: 180px;
      overflow: hidden;
    }

    .pattern-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

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

    .pattern-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 14, 23, 0.8);
      backdrop-filter: blur(6px);
      border: 1px solid rgba(34, 211, 238, 0.4);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 999px;
    }

    .pattern-body {
      padding: 22px 22px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .pattern-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: #f1f5f9;
    }

    .pattern-body p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.75;
      flex: 1;
    }

    .pattern-meta {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-top: 6px;
    }

    .meta-chip {
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border);
      color: var(--text-weak);
    }

    /* ========== 观察方法 ========== */
    .method-section {
      padding: 96px 0;
      background: var(--bg-dark);
      position: relative;
      overflow: hidden;
    }

    .method-section::after {
      content: "";
      position: absolute;
      bottom: -100px;
      right: -100px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.08), transparent 60%);
      pointer-events: none;
    }

    .step-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      z-index: 2;
    }

    .step-item {
      position: relative;
      background: var(--bg-panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 24px 30px;
      transition: var(--transition);
      text-align: center;
    }

    .step-item:hover {
      transform: translateY(-6px);
      border-color: rgba(168, 85, 247, 0.4);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
    }

    .step-num {
      width: 52px;
      height: 52px;
      margin: 0 auto 18px;
      border-radius: 16px;
      background: var(--gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
    }

    .step-item h3 {
      font-size: 18px;
      font-weight: 700;
      color: #f1f5f9;
      margin-bottom: 12px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-weak);
      line-height: 1.75;
    }

    /* ========== 统计区 ========== */
    .stats-section {
      padding: 80px 0;
      background: var(--bg-deep);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      background:
        radial-gradient(ellipse at center, rgba(34, 211, 238, 0.06), transparent 65%),
        var(--bg-deep);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .stat-item {
      text-align: center;
      padding: 34px 20px;
      border-radius: var(--radius-lg);
      background: var(--bg-panel);
      border: 1px solid var(--border);
      transition: var(--transition);
    }

    .stat-item:hover {
      border-color: rgba(34, 211, 238, 0.4);
      box-shadow: 0 0 24px rgba(34, 211, 238, 0.1);
    }

    .stat-item strong {
      display: block;
      font-size: 40px;
      font-weight: 800;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .stat-item span {
      font-size: 14px;
      color: var(--text-weak);
    }

    /* ========== 路单表格 ========== */
    .record-section {
      padding: 96px 0;
      background: var(--bg-dark);
    }

    .record-table-wrap {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 18px;
      overflow-x: auto;
      box-shadow: var(--shadow);
    }

    .record-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 560px;
    }

    .record-table th {
      text-align: left;
      font-size: 13px;
      color: var(--text-weak);
      font-weight: 600;
      padding: 14px 18px;
      border-bottom: 1px solid var(--border);
      letter-spacing: 1px;
      background: rgba(255, 255, 255, 0.02);
    }

    .record-table td {
      padding: 14px 18px;
      font-size: 14px;
      border-bottom: 1px solid rgba(139, 153, 187, 0.08);
      color: var(--text-main);
    }

    .record-table tr:last-child td {
      border-bottom: none;
    }

    .record-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    .result-tag {
      display: inline-block;
      padding: 3px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      min-width: 44px;
      text-align: center;
    }

    .result-tag.zhuang {
      background: rgba(34, 211, 238, 0.15);
      color: var(--primary);
      border: 1px solid rgba(34, 211, 238, 0.3);
    }

    .result-tag.xian {
      background: rgba(168, 85, 247, 0.15);
      color: #d8b4fe;
      border: 1px solid rgba(168, 85, 247, 0.3);
    }

    .table-note {
      display: flex;
      justify-content: flex-end;
      margin-top: 16px;
      font-size: 13px;
      color: var(--text-weak);
    }

    /* ========== FAQ ========== */
    .faq-section {
      padding: 96px 0;
      background: var(--bg-deep);
      position: relative;
    }

    .faq-section::before {
      content: "";
      position: absolute;
      top: 60px;
      left: 10%;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.05), transparent 65%);
      pointer-events: none;
    }

    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: grid;
      gap: 16px;
    }

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

    .faq-item:hover {
      border-color: rgba(34, 211, 238, 0.3);
    }

    .faq-item summary {
      padding: 20px 26px;
      font-size: 16px;
      font-weight: 600;
      color: #f1f5f9;
      cursor: pointer;
      list-style: none;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: var(--transition);
      position: relative;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::before {
      content: "+";
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      border-radius: 8px;
      background: rgba(34, 211, 238, 0.1);
      border: 1px solid rgba(34, 211, 238, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-item details[open] summary::before {
      transform: rotate(45deg);
      background: rgba(34, 211, 238, 0.2);
    }

    .faq-item details[open] summary {
      border-bottom: 1px solid rgba(139, 153, 187, 0.1);
    }

    .faq-item p {
      padding: 18px 26px 22px;
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.9;
    }

    /* ========== CTA ========== */
    .cta-section {
      padding: 100px 0;
      background:
        linear-gradient(135deg, rgba(10, 14, 23, 0.88), rgba(13, 19, 34, 0.75)),
        url('/assets/images/backpic/back-3.png') center/cover no-repeat;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      top: -50px;
      left: 50%;
      transform: translateX(-50%);
      width: 500px;
      height: 200px;
      background: radial-gradient(ellipse, rgba(34, 211, 238, 0.12), transparent 70%);
      pointer-events: none;
    }

    .cta-section h2 {
      font-size: 36px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
      z-index: 2;
    }

    .cta-section p {
      color: var(--text-weak);
      max-width: 580px;
      margin: 0 auto 34px;
      font-size: 16px;
      line-height: 1.85;
      position: relative;
      z-index: 2;
    }

    .cta-section .btn-primary {
      position: relative;
      z-index: 2;
    }

    .cta-note {
      display: block;
      margin-top: 22px;
      font-size: 13px;
      color: rgba(226, 232, 240, 0.6);
      letter-spacing: 2px;
      position: relative;
      z-index: 2;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: #070a11;
      border-top: 1px solid var(--border);
      padding-top: 70px;
      color: var(--text-weak);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 44px;
      padding-bottom: 50px;
    }

    .footer-brand .logo {
      font-size: 22px;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.8;
      color: var(--text-weak);
      max-width: 320px;
      margin-top: 14px;
    }

    .footer-col h4 {
      color: #f1f5f9;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      letter-spacing: 1px;
    }

    .footer-col ul {
      display: grid;
      gap: 10px;
    }

    .footer-col li a {
      font-size: 14px;
      color: var(--text-weak);
      transition: var(--transition);
      position: relative;
      padding-left: 0;
    }

    .footer-col li a:hover {
      color: var(--primary);
      padding-left: 6px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(139, 153, 187, 0.1);
      padding: 24px 0;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      font-size: 13px;
      color: rgba(148, 163, 184, 0.8);
    }

    .footer-bottom span {
      opacity: 0.4;
    }

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

    /* ========== 响应式断点 ========== */
    @media (max-width: 1180px) {
      :root {
        --container: 96%;
      }

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

    @media (max-width: 1024px) {
      .concept-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .concept-image img {
        max-height: 360px;
        object-fit: cover;
        width: 100%;
      }

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

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

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

    @media (max-width: 768px) {
      .header-inner {
        gap: 14px;
      }

      .main-nav {
        display: none;
        position: absolute;
        top: calc(var(--header-h) + 8px);
        left: 4%;
        right: 4%;
        background: rgba(10, 14, 23, 0.97);
        backdrop-filter: blur(16px);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 14px;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        box-shadow: var(--shadow);
      }

      .main-nav.open {
        display: flex;
      }

      .nav-link {
        padding: 12px 16px;
        border-radius: 10px;
        text-align: left;
      }

      .nav-link.active {
        background: rgba(34, 211, 238, 0.12);
        box-shadow: inset 3px 0 0 var(--primary);
      }

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

      .header-actions {
        margin-left: auto;
      }

      .header-actions .btn-nav {
        display: none;
      }

      .page-banner {
        padding: 80px 0 66px;
      }

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

      .page-banner p {
        font-size: 15px;
      }

      .section-pad,
      .concept-section,
      .patterns-section,
      .method-section,
      .record-section,
      .faq-section {
        padding: 64px 0;
      }

      .section-head h2 {
        font-size: 28px;
      }

      .section-head {
        margin-bottom: 40px;
      }

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

      .pattern-media {
        height: 200px;
      }

      .step-wrap {
        grid-template-columns: 1fr;
      }

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

      .cta-section {
        padding: 70px 0;
      }

      .cta-section h2 {
        font-size: 28px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 34px;
      }
    }

    @media (max-width: 520px) {
      body {
        font-size: 15px;
      }

      .logo {
        font-size: 20px;
      }

      .header-inner {
        min-height: 64px;
      }

      :root {
        --header-h: 64px;
      }

      .page-banner h1 {
        font-size: 28px;
      }

      .banner-crumb {
        font-size: 13px;
        padding: 6px 14px;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .concept-content h3 {
        font-size: 22px;
      }

      .step-item {
        padding: 26px 20px;
      }

      .stats-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }

      .footer-bottom {
        flex-direction: column;
      }
    }

    /* ========== 无障碍 ========== */
    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }