/* roulang page: index */
:root{--primary:#0f172a;--primary-light:#1e293b;--accent:#f59e0b;--accent-hover:#d97706;--accent-soft:#fef3c7;--bg:#f8fafc;--bg-alt:#f1f5f9;--card:#ffffff;--text:#0f172a;--text-secondary:#475569;--text-light:#94a3b8;--border:#e2e8f0;--radius:16px;--radius-sm:10px;--radius-lg:24px;--shadow:0 4px 20px rgba(15,23,42,.06);--shadow-lg:0 12px 36px rgba(15,23,42,.10);--container:1200px;--transition:all .3s ease}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.75;color:var(--text);background:var(--bg);font-size:16px}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:var(--transition)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:90px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:5px 16px;border-radius:100px;margin-bottom:12px}
.section-head h2{font-size:38px;margin-bottom:14px;letter-spacing:-.5px}
.section-head p{color:var(--text-secondary);font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;padding:14px 32px;border-radius:12px;transition:var(--transition);font-size:15px;border:2px solid transparent}
.btn-primary{background:var(--accent);color:#0f172a}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,158,11,.35)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-dark{background:var(--primary);color:#fff}.btn-dark:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-sm{padding:9px 20px;font-size:14px;border-radius:10px}
.tag{display:inline-block;font-size:12px;font-weight:600;padding:4px 12px;border-radius:100px;background:var(--bg-alt);color:var(--primary-light);border:1px solid var(--border)}
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,232,240,.6);transition:var(--transition)}
.site-header.scrolled{box-shadow:0 4px 24px rgba(15,23,42,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--accent);font-weight:800;font-size:18px}
.logo-name{font-size:17px;font-weight:800;letter-spacing:-.3px;color:var(--text)}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{padding:8px 16px;font-size:15px;font-weight:500;color:var(--text-secondary);border-radius:8px}
.nav-link:hover{color:var(--text);background:var(--bg-alt)}
.nav-link.active{color:var(--primary);font-weight:600;background:var(--bg-alt)}
.header-right{display:flex;align-items:center;gap:14px}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{width:220px;height:40px;border:1px solid var(--border);border-radius:10px;padding:0 14px 0 38px;font-size:14px;background:var(--bg-alt);color:var(--text);transition:var(--transition);outline:none}
.search-box input:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(245,158,11,.15);width:260px}
.search-icon{position:absolute;left:12px;width:18px;height:18px;color:var(--text-light);pointer-events:none}
.search-box kbd{position:absolute;right:10px;font-size:11px;background:var(--border);padding:2px 6px;border-radius:5px;color:var(--text-light)}
.header-cta{white-space:nowrap}
.menu-toggle{display:none;width:40px;height:40px;border-radius:8px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.hero{position:relative;padding:160px 0 100px;background-color:var(--primary);overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.35}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,.92) 0%,rgba(15,23,42,.75) 50%,rgba(15,23,42,.55) 100%)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:#fff;padding:6px 16px;border-radius:100px;font-size:13px;font-weight:500;margin-bottom:24px;backdrop-filter:blur(8px)}
.hero-badge i{width:6px;height:6px;background:var(--accent);border-radius:50px;display:inline-block}
.hero h1{font-size:52px;line-height:1.15;color:#fff;margin-bottom:20px;letter-spacing:-1.5px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-desc{color:rgba(255,255,255,.75);font-size:18px;max-width:520px;margin-bottom:36px;line-height:1.8}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.stat-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:28px 22px;text-align:center;backdrop-filter:blur(8px);transition:var(--transition)}
.stat-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.14)}
.stat-num{font-size:40px;font-weight:800;color:var(--accent);line-height:1;margin-bottom:8px}
.stat-num span{font-size:22px}
.stat-label{color:rgba(255,255,255,.7);font-size:14px}
.hero-scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;color:rgba(255,255,255,.5);font-size:20px;animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}
.ticker-bar{background:var(--primary-light);border-bottom:1px solid var(--border);padding:12px 0;overflow:hidden}
.ticker-inner{display:flex;align-items:center;gap:20px}
.ticker-label{flex-shrink:0;font-size:13px;font-weight:700;color:var(--accent);background:rgba(245,158,11,.15);padding:4px 14px;border-radius:100px}
.ticker-track{display:flex;gap:36px;overflow:hidden;white-space:nowrap}
.ticker-track span{font-size:14px;color:var(--text-secondary)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.category-card{background:var(--card);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);transition:var(--transition);display:block}
.category-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.category-img{position:relative;height:200px;overflow:hidden}
.category-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.category-card:hover .category-img img{transform:scale(1.05)}
.category-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(15,23,42,.3),transparent)}
.category-body{padding:28px}
.category-body h3{font-size:19px;margin-bottom:8px}
.category-body p{color:var(--text-secondary);font-size:14px;line-height:1.7;margin-bottom:16px}
.category-link{font-size:14px;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:4px}
.category-link i{transition:transform .3s}
.category-card:hover .category-link i{transform:translateX(4px)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-img{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.about-img img{width:100%;height:100%;object-fit:cover}
.about-content h2{font-size:34px;margin-bottom:18px}
.about-content>p{color:var(--text-secondary);font-size:16px;margin-bottom:24px}
.about-list{display:flex;flex-direction:column;gap:14px}
.about-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--text)}
.about-list i{color:var(--accent);font-weight:700;flex-shrink:0}
.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(--radius-lg);padding:32px 26px;transition:var(--transition)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;background:var(--accent-soft);color:var(--accent);margin-bottom:16px}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card p{color:var(--text-secondary);font-size:14px;line-height:1.7}
.news-grid{display:grid;gap:16px}
.news-item{display:flex;gap:20px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:var(--transition)}
.news-item:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:transparent}
.news-thumb{width:160px;height:110px;border-radius:10px;overflow:hidden;flex-shrink:0}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-info{flex:1;display:flex;flex-direction:column;justify-content:center}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.news-meta .tag{font-size:11px;padding:2px 10px}
.news-meta .date{font-size:13px;color:var(--text-light)}
.news-info h3{font-size:18px;margin-bottom:6px;line-height:1.4}
.news-info p{font-size:14px;color:var(--text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.read-more{margin-top:8px;font-size:13px;font-weight:600;color:var(--accent)}
.empty-tip{background:var(--card);border:1px dashed var(--border);border-radius:var(--radius);padding:48px;text-align:center;color:var(--text-light)}
.stats-section{background:var(--primary);position:relative;overflow:hidden}
.stats-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover;opacity:.1}
.stats-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat-item{text-align:center;padding:30px 20px}
.stat-item .num{font-size:52px;font-weight:800;color:var(--accent);line-height:1;margin-bottom:10px}
.stat-item .label{color:rgba(255,255,255,.7);font-size:15px}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:var(--transition)}
.faq-item.active{border-color:var(--accent);box-shadow:0 4px 20px rgba(245,158,11,.12)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 26px;font-size:16px;font-weight:600;color:var(--text);text-align:left}
.faq-question .faq-icon{width:32px;height:32px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--text-secondary);flex-shrink:0;transition:transform .3s}
.faq-item.active .faq-question .faq-icon{transform:rotate(45deg);background:var(--accent);color:#fff}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 26px}
.faq-answer p{padding-bottom:24px;color:var(--text-secondary);font-size:15px;line-height:1.8}
.cta-section{position:relative;padding:100px 0;background-color:var(--primary);overflow:hidden}
.cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover;opacity:.3}
.cta-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,.9),rgba(15,23,42,.7))}
.cta-content{position:relative;z-index:2;text-align:center;max-width:680px;margin:0 auto}
.cta-content h2{color:#fff;font-size:38px;margin-bottom:16px}
.cta-content p{color:rgba(255,255,255,.7);font-size:17px;margin-bottom:36px}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.site-footer{background:var(--primary);color:rgba(255,255,255,.7);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:60px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo-name{color:#fff}
.footer-brand .logo-icon{background:var(--accent);color:var(--primary)}
.footer-brand p{font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:20px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.6)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:24px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom a{color:rgba(255,255,255,.4)}.footer-bottom a:hover{color:var(--accent)}
@media(max-width:1024px){.hero-inner{grid-template-columns:1fr;gap:40px}.hero h1{font-size:42px}.feature-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.category-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto}.about-grid{grid-template-columns:1fr}}
@media(max-width:768px){.section{padding:60px 0}.main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:16px;gap:4px;box-shadow:var(--shadow-lg)}.main-nav.open{display:flex}.nav-link{padding:12px 20px;width:100%}.menu-toggle{display:flex}.search-box{display:none}.hero{padding:130px 0 70px}.hero h1{font-size:34px}.hero-stats{grid-template-columns:repeat(3,1fr);gap:10px}.stat-card{padding:16px 12px}.stat-num{font-size:30px}.section-head h2{font-size:28px}.news-item{flex-direction:column}.news-thumb{width:100%;height:160px}.footer-grid{grid-template-columns:1fr;gap:32px}.header-cta{display:none}}
@media(max-width:520px){.container{padding:0 16px}.hero h1{font-size:28px}.hero-buttons{flex-direction:column}.btn{width:100%}.feature-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr}.category-grid{gap:16px}.footer-bottom{flex-direction:column;text-align:center}}

/* roulang page: category1 */
:root {
  --primary: #5B5FEF;
  --primary-dark: #4549E8;
  --primary-light: #C9CFFF;
  --secondary: #00C2A8;
  --accent: #FFB946;
  --bg: #F7F8FC;
  --bg-alt: #EEF0FB;
  --card-bg: #FFFFFF;
  --text: #13162B;
  --text-light: #5A607F;
  --text-weak: #8C91A8;
  --border: #E3E6F0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 10px 30px rgba(20, 24, 60, .08);
  --shadow-lg: 0 20px 50px rgba(20, 24, 60, .14);
  --transition: all .3s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

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

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

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

ul,
ol {
  list-style: none;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(227, 230, 240, .7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .5px;
  box-shadow: 0 6px 16px rgba(91, 95, 239, .35);
}

.logo-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .3px;
  color: var(--text);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(91, 95, 239, .08);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(91, 95, 239, .12);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  width: 220px;
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(91, 95, 239, .12);
}

.search-box input {
  flex: 1;
  font-size: 13.5px;
  color: var(--text);
  background: transparent;
}

.search-box input::placeholder {
  color: var(--text-weak);
}

.search-box button {
  color: var(--text-weak);
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
}

.search-box button:hover {
  color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 8px 20px rgba(91, 95, 239, .3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(91, 95, 239, .4);
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(91, 95, 239, .06);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.header-cta {
  margin-left: 4px;
}

.nav-toggle {
  display: none;
  font-size: 24px;
  color: var(--text);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-toggle:hover {
  background: var(--bg-alt);
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 90px 0 80px;
  background-size: cover;
  background-position: center;
  background-color: #171A2E;
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 22, 44, .55) 0%, rgba(20, 22, 44, .75) 100%);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .14);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, .2);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--secondary);
}

.page-hero h1 {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.5px;
  max-width: 760px;
  margin: 0 auto 18px;
}

.page-hero p {
  font-size: 17px;
  opacity: .9;
  max-width: 640px;
  margin: 0 auto;
}

/* ===== Update Bar ===== */
.update-bar {
  background: linear-gradient(135deg, #F3F4FD, #EDF0FF);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.update-bar .container {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.update-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .5px;
}

.update-text {
  font-size: 14px;
  color: var(--text-light);
  font-weight: 500;
}

/* ===== Section ===== */
.section {
  padding: 88px 0;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(91, 95, 239, .1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 34px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -.3px;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-light);
}

/* ===== Intro ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.intro-text .section-tag {
  margin-bottom: 16px;
}

.intro-text h2 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 800;
  margin-bottom: 18px;
}

.intro-text p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.intro-list {
  display: grid;
  gap: 14px;
}

.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
}

.intro-list li i {
  color: var(--secondary);
  font-size: 18px;
  margin-top: 2px;
}

.intro-visual {
  position: relative;
}

.intro-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.intro-visual::after {
  content: "";
  position: absolute;
  inset: 16px -16px -16px 16px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(91, 95, 239, .18), transparent);
  z-index: -1;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 20px;
  color: var(--primary);
  background: rgba(91, 95, 239, .1);
}

.feature-card:nth-child(2) .feature-icon {
  color: var(--secondary);
  background: rgba(0, 194, 168, .1);
}

.feature-card:nth-child(3) .feature-icon {
  color: var(--accent);
  background: rgba(255, 185, 70, .14);
}

.feature-card:nth-child(4) .feature-icon {
  color: #F97373;
  background: rgba(249, 115, 115, .12);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.65;
}

/* ===== Stats ===== */
.stats-section {
  position: relative;
  padding: 100px 0;
  background-size: cover;
  background-position: center;
  background-color: #171A2E;
  color: #fff;
}

.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(23, 26, 46, .86), rgba(91, 95, 239, .72));
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(6px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, .14);
  transform: translateY(-4px);
}

.stat-item strong {
  display: block;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #fff, #D9DCFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item span {
  font-size: 14px;
  opacity: .85;
}

/* ===== Showcase ===== */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.showcase-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.showcase-content .section-tag {
  margin-bottom: 14px;
}

.showcase-content h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
}

.showcase-content p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.showcase-points {
  display: grid;
  gap: 14px;
}

.showcase-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.showcase-points li i {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 194, 168, .12);
  color: var(--secondary);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 5px;
}

.showcase-points strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  margin-bottom: 3px;
}

.showcase-points span {
  font-size: 14px;
  color: var(--text-light);
}

/* ===== Scene Cards ===== */
.scenes-section {
  background: var(--bg-alt);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.scene-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  display: block;
  transition: var(--transition);
}

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

.scene-card .cover-wrap {
  height: 190px;
  overflow: hidden;
  position: relative;
}

.scene-card .cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.scene-card:hover .cover-wrap img {
  transform: scale(1.06);
}

.scene-card .cover-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(20, 22, 44, .28));
}

.scene-body {
  padding: 24px;
}

.scene-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.scene-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.65;
  margin-bottom: 14px;
}

.scene-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}

.scene-more i {
  font-size: 12px;
  transition: transform .3s ease;
}

.scene-card:hover .scene-more i {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: var(--primary-light);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .3s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-body {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
  padding: 0 0 88px;
  background: var(--bg);
}

.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
}

.cta-box::after {
  content: "";
  position: absolute;
  bottom: -60%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(0, 194, 168, .14);
}

.cta-box h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  font-size: 16px;
  opacity: .9;
  max-width: 520px;
  margin: 0 auto 30px;
  position: relative;
  z-index: 1;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.cta-actions .btn-white {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .16);
}

.cta-actions .btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .2);
}

.cta-actions .btn-ghost {
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .4);
  color: #fff;
}

.cta-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, .2);
}

/* ===== Footer ===== */
.site-footer {
  background: #101322;
  color: rgba(255, 255, 255, .7);
  padding: 70px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

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

.footer-brand .logo-name {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  opacity: .75;
  max-width: 340px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

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

.footer-col a {
  font-size: 14px;
  opacity: .75;
  transition: var(--transition);
}

.footer-col a:hover {
  opacity: 1;
  color: #D9DCFF;
}

.footer-col li {
  font-size: 14px;
  opacity: .75;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  opacity: .6;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .search-box {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

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

  .site-header {
    padding: 0;
  }

  .header-inner {
    height: 68px;
  }

  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
  }

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

  .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .page-hero {
    padding: 70px 0 60px;
  }

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

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

  .section {
    padding: 64px 0;
  }

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

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .intro-visual::after {
    inset: 10px -10px -10px 10px;
  }

  .showcase-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-item strong {
    font-size: 32px;
  }

  .cta-box {
    padding: 44px 28px;
  }

  .cta-box h2 {
    font-size: 26px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

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

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

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

  .update-bar .container {
    justify-content: center;
    text-align: center;
  }

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

  .intro-text h2,
  .showcase-content h2 {
    font-size: 25px;
  }

  .stats-grid {
    grid-template-columns: 2fr 2fr;
  }

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

  .stat-item strong {
    font-size: 26px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-deep: #0f172a;
  --bg-soft: #f1f5f9;
  --text-main: #1e293b;
  --text-weak: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.10);
  --space-section: 96px;
  --space-section-m: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--primary); text-decoration: none; transition: color .2s ease; }

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

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

input, select, textarea { font-family: inherit; }

ul, ol { list-style: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: all .25s ease;
  border: 1px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25); }

.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(37, 99, 235, 0.32); }

.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }

.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37, 99, 235, 0.20); }

.btn-light { background: #fff; color: var(--primary-dark); }

.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12); }

.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.7); }

.btn-outline-light:hover { background: rgba(255, 255, 255, 0.14); color: #fff; transform: translateY(-2px); }

.btn-block { width: 100%; }

.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 10px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-soft);
  color: var(--text-weak);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: all .2s;
}

.tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
  flex-shrink: 0;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.logo-name { letter-spacing: 0.5px; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}

.nav-link {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  transition: all .2s;
  white-space: nowrap;
}

.nav-link:hover { background: var(--primary-light); color: var(--primary); }

.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28); }

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

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  width: 200px;
  transition: all .25s;
}

.search-box:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }

.search-box i { color: var(--text-light); font-size: 14px; }

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  width: 100%;
  color: var(--text-main);
}

.search-box input::placeholder { color: var(--text-light); }

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-main);
  font-size: 18px;
  align-items: center;
  justify-content: center;
}

/* Article Hero */
.article-hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 80px 0 72px;
  color: #fff;
  overflow: hidden;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, 0.82), rgba(37, 99, 235, 0.62));
  z-index: 1;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.breadcrumb a { color: rgba(255, 255, 255, 0.85); }

.breadcrumb a:hover { color: #fff; }

.breadcrumb .sep { opacity: 0.6; }

.article-hero h1 {
  font-size: 38px;
  line-height: 1.35;
  font-weight: 800;
  max-width: 820px;
  margin: 18px 0 16px;
  letter-spacing: 0.5px;
}

.article-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.88);
  max-width: 720px;
  line-height: 1.8;
  margin-bottom: 22px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.hero-meta .badge-white {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 600;
}

.hero-meta i { margin-right: 5px; opacity: 0.85; }

/* Article Section */
.article-section {
  padding: 72px 0 80px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 48px;
  align-items: start;
}

.article-main {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 40px;
  min-width: 0;
}

.article-cover {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.article-cover img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: #334155;
}

.article-content h2, .article-content h3, .article-content h4 {
  color: var(--text-main);
  margin: 32px 0 16px;
  line-height: 1.4;
  font-weight: 700;
}

.article-content h2 { font-size: 24px; border-left: 4px solid var(--primary); padding-left: 14px; }

.article-content h3 { font-size: 20px; }

.article-content p { margin-bottom: 18px; }

.article-content ul, .article-content ol { margin-bottom: 20px; padding-left: 24px; }

.article-content ul li { list-style: disc; margin-bottom: 8px; }

.article-content ol li { list-style: decimal; margin-bottom: 8px; }

.article-content a { text-decoration: underline; text-underline-offset: 3px; }

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  margin: 22px 0;
  color: var(--text-main);
  font-size: 15px;
}

.article-content img {
  border-radius: var(--radius);
  margin: 22px 0;
}

.article-content code {
  background: var(--bg-soft);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.article-share {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.article-share span {
  font-size: 14px;
  color: var(--text-weak);
  font-weight: 500;
}

.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  font-size: 15px;
  transition: all .2s;
}

.share-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

.article-empty {
  text-align: center;
  padding: 60px 20px;
}

.article-empty h2 {
  font-size: 32px;
  color: var(--text-main);
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-weak);
  margin-bottom: 28px;
  font-size: 16px;
}

/* Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 0;
}

.sidebar-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}

.sidebar-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.sidebar-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
}

.sidebar-list li { margin-bottom: 4px; }

.sidebar-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-main);
  transition: all .2s;
}

.sidebar-list a i { color: var(--primary); width: 18px; text-align: center; }

.sidebar-list a:hover { background: var(--primary-light); color: var(--primary); transform: translateX(4px); }

.recent-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.recent-list li:last-child { border-bottom: none; }

.recent-list a {
  display: block;
  font-size: 14px;
  color: var(--text-main);
  font-weight: 500;
  line-height: 1.5;
  transition: color .2s;
}

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

.recent-list .recent-date {
  display: block;
  font-size: 12px;
  color: var(--text-light);
  margin-top: 5px;
}

.sidebar-cta {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  border-color: transparent;
  color: #fff;
  text-align: left;
}

.sidebar-cta h3 { color: #fff; }

.sidebar-cta h3::after { background: rgba(255, 255, 255, 0.7); }

.sidebar-cta p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 22px;
  line-height: 1.7;
}

.sidebar-cta .btn-outline { border-color: #fff; color: #fff; }

.sidebar-cta .btn-outline:hover { background: #fff; color: var(--primary); }

/* Related Section */
.related-section {
  background: var(--bg-white);
  padding: 72px 0 80px;
  border-top: 1px solid var(--border);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.section-head .link-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap .2s;
}

.section-head .link-more:hover { gap: 12px; color: var(--primary-dark); }

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.related-card {
  display: block;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s ease;
  box-shadow: var(--shadow-sm);
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.35);
}

.related-card .rel-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.related-card .rel-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}

.related-card:hover .rel-img img { transform: scale(1.06); }

.related-card .rel-body { padding: 22px 22px 24px; }

.related-card .badge { margin-bottom: 12px; }

.related-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.55;
  margin: 12px 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .rel-date {
  display: block;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-light);
}

/* CTA Section */
.cta-section {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  padding: 80px 0;
  text-align: center;
  color: #fff;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, 0.85), rgba(37, 99, 235, 0.7));
  z-index: 1;
}

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

.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.cta-section p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0 auto 34px;
  line-height: 1.8;
}

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

/* Footer */
.site-footer {
  background: var(--bg-deep);
  color: #cbd5e1;
  padding: 72px 0 0;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 56px;
}

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

.footer-brand .logo-name { color: #fff; }

.footer-brand p {
  color: #94a3b8;
  line-height: 1.8;
  max-width: 320px;
  font-size: 14px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li { margin-bottom: 12px; }

.footer-col ul li a { color: #94a3b8; transition: color .2s; }

.footer-col ul li a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #64748b;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}

/* Responsive */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .sidebar-card {
    flex: 1 1 calc(50% - 12px);
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .search-box { width: 160px; }
}

@media (max-width: 820px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 20px 24px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
    border-bottom: 1px solid var(--border);
    display: none;
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .nav-link {
    text-align: left;
    padding: 12px 16px;
    border-radius: 10px;
  }
  .menu-toggle { display: inline-flex; }
  .header-actions .btn-sm { display: none; }
  .search-box { display: none; }
  .article-hero h1 { font-size: 28px; }
  .cta-section h2 { font-size: 28px; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .article-hero { padding: 56px 0 48px; }
  .article-hero h1 { font-size: 24px; }
  .article-desc { font-size: 15px; }
  .hero-meta { gap: 12px; flex-direction: column; align-items: flex-start; }
  .article-section { padding: 48px 0 56px; }
  .article-main { padding: 24px 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 24px; }
  .cta-section { padding: 60px 0; }
  .cta-section h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .sidebar-card { flex: 1 1 100%; }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --bg: #f8fafc;
    --bg-white: #ffffff;
    --bg-gray: #f1f5f9;
    --bg-dark: #0f172a;
    --text-main: #1e293b;
    --text-body: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --space-2xl: 96px;
    --header-h: 72px;
    --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; outline: none; }
ul, ol { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

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

.section { padding: var(--space-2xl) 0; }
.section-alt { background: var(--bg-white); }

/* ===== 导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    height: var(--header-h);
}

.header-inner {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #fff;
    font-weight: 800;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.logo-name {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-main);
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 12px;
}

.main-nav .nav-link {
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 999px;
    position: relative;
    transition: color 0.2s, background 0.2s;
}

.main-nav .nav-link:hover {
    color: var(--primary);
    background: var(--bg-gray);
}

.main-nav .nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(37,99,235,0.08);
}

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

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

.header-search {
    display: flex;
    align-items: center;
    background: var(--bg-gray);
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 7px 8px 7px 16px;
    width: 220px;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.header-search:hover {
    border-color: var(--border);
}

.header-search:focus-within {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.header-search input {
    border: none;
    background: transparent;
    font-size: 14px;
    color: var(--text-main);
    width: 100%;
}

.header-search input::placeholder { color: var(--text-muted); }

.search-icon {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #fff;
    font-size: 13px;
}

.btn-header {
    padding: 10px 22px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: 999px;
    box-shadow: 0 4px 14px rgba(37,99,235,0.32);
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}

.btn-header:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37,99,235,0.4);
}

.mobile-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-gray);
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--text-main);
}

/* ===== 按钮通用 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.25s ease;
    border: 2px solid transparent;
    line-height: 1.4;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #fff;
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(37,99,235,0.4);
}

.btn-outline {
    background: transparent;
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: rgba(37,99,235,0.06);
    transform: translateY(-2px);
}

.btn-light {
    background: #fff;
    color: var(--text-main);
    box-shadow: var(--shadow-md);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

/* ===== 页面横幅 ===== */
.page-banner {
    position: relative;
    padding: 90px 0 80px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e3a8a 100%);
    overflow: hidden;
    isolation: isolate;
}

.page-banner .backdrop {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
    z-index: -1;
}

.page-banner .banner-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37,99,235,0.5), transparent 70%);
    top: -200px;
    right: -100px;
    z-index: -1;
}

.page-banner .banner-glow-2 {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245,158,11,0.3), transparent 70%);
    bottom: -150px;
    left: -50px;
    z-index: -1;
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 760px;
    margin: 0 auto;
}

.banner-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 999px;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
}

.banner-content h1 {
    font-size: 42px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
}

.banner-content h1 .grad-text {
    background: linear-gradient(90deg, #93c5fd, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.banner-content p {
    color: #cbd5e1;
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 36px;
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.banner-stat {
    text-align: center;
}

.banner-stat strong {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}

.banner-stat span {
    font-size: 14px;
    color: #94a3b8;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 18px 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.breadcrumb-inner a { color: var(--text-body); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-inner .separator { color: var(--border); }
.breadcrumb-inner .current { color: var(--primary); font-weight: 500; }

/* ===== 快速上手步骤 ===== */
.steps-section { padding: var(--space-2xl) 0; }

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 52px;
}

.section-head .subtitle {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(37,99,235,0.08);
    padding: 6px 16px;
    border-radius: 999px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.section-head h2 {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-main);
    line-height: 1.3;
    margin-bottom: 12px;
}

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

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

.step-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--border-light);
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.step-num {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.step-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
}

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

.step-card .step-tag {
    display: inline-block;
    margin-top: 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(37,99,235,0.06);
    padding: 4px 12px;
    border-radius: 999px;
}

/* ===== 详细指南卡片 ===== */
.guide-cards { padding: var(--space-2xl) 0; }

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.guide-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s, box-shadow 0.3s;
}

.guide-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.guide-card .card-cover {
    position: relative;
    height: 190px;
    overflow: hidden;
}

.guide-card .card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.guide-card .card-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(15,23,42,0.4));
}

.guide-card .card-type {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 1;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(8px);
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    padding: 5px 14px;
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
}

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

.guide-card .card-body h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
    line-height: 1.5;
}

.guide-card .card-body p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
    flex: 1;
}

.guide-card .card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.guide-card .card-meta .meta-item {
    font-size: 12px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.guide-card .card-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s;
}

.guide-card .card-link:hover { gap: 8px; color: var(--primary-dark); }

/* ===== 操作注意事项 ===== */
.tips-section {
    padding: var(--space-2xl) 0;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.tips-section .backdrop {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
}

.tips-content {
    position: relative;
    z-index: 1;
}

.tips-content .section-head h2 { color: #fff; }
.tips-content .section-head p { color: #94a3b8; }

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.tip-item {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    backdrop-filter: blur(8px);
    transition: border-color 0.3s, background 0.3s;
}

.tip-item:hover {
    border-color: rgba(96,165,250,0.4);
    background: rgba(255,255,255,0.08);
}

.tip-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), #f97316);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    flex-shrink: 0;
}

.tip-icon.green { background: linear-gradient(135deg, #10b981, #059669); }
.tip-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.tip-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 6px;
}

.tip-item p {
    font-size: 14px;
    color: #94a3b8;
    line-height: 1.7;
}

/* ===== 热门教程排行 ===== */
.hot-section { padding: var(--space-2xl) 0; }

.hot-list {
    max-width: 860px;
    margin: 0 auto;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.hot-list-item {
    display: flex;
    align-items: center;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border-light);
    transition: background 0.2s;
    gap: 20px;
}

.hot-list-item:last-child { border-bottom: none; }

.hot-list-item:hover {
    background: var(--bg-gray);
}

.hot-rank {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--bg-gray);
    color: var(--text-muted);
    font-weight: 700;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hot-list-item:nth-child(1) .hot-rank { background: linear-gradient(135deg, #f59e0b, #f97316); color: #fff; }
.hot-list-item:nth-child(2) .hot-rank { background: linear-gradient(135deg, #94a3b8, #64748b); color: #fff; }
.hot-list-item:nth-child(3) .hot-rank { background: linear-gradient(135deg, #d97706, #b45309); color: #fff; }

.hot-info { flex: 1; min-width: 0; }

.hot-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.2s;
}

.hot-list-item:hover .hot-info h4 { color: var(--primary); }

.hot-info p {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hot-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.hot-view {
    font-size: 13px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.hot-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(37,99,235,0.08);
    color: var(--primary);
}

/* ===== FAQ ===== */
.faq-section { padding: var(--space-2xl) 0; background: var(--bg-white); }

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: border-color 0.3s;
}

.faq-item:hover { border-color: var(--primary-light); }

.faq-question {
    width: 100%;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
}

.faq-question .faq-toggle-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(37,99,235,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--primary);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.open .faq-toggle-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-inner {
    padding: 0 28px 22px;
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 400px;
}

/* ===== CTA 区块 ===== */
.cta-section {
    padding: var(--space-xl) 0;
    position: relative;
    overflow: hidden;
}

.cta-box {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 60%, #4f46e5 100%);
    border-radius: var(--radius-xl);
    padding: 64px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(37,99,235,0.3);
}

.cta-box::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 70%);
    top: -100px;
    left: -60px;
}

.cta-box::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(251,191,36,0.2), transparent 70%);
    bottom: -60px;
    right: -40px;
}

.cta-box h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.cta-box p {
    font-size: 16px;
    color: #bfdbfe;
    margin-bottom: 32px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    position: relative;
    z-index: 1;
    flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-dark);
    color: #94a3b8;
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

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

.footer-brand .logo-name { color: #fff; }

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #94a3b8;
    max-width: 340px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 18px;
}

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

.footer-col ul li a {
    font-size: 14px;
    color: #94a3b8;
    transition: color 0.2s, padding-left 0.2s;
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-col ul li {
    font-size: 14px;
    line-height: 1.7;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-bottom p {
    font-size: 14px;
    color: #64748b;
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
    .header-search { width: 170px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 991px) {
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
    .main-nav { display: none; }
    .mobile-toggle { display: flex; }
    .header-search { display: none; }
    
    .mobile-menu {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        padding: 16px 24px;
        display: none;
        flex-direction: column;
        gap: 4px;
        z-index: 99;
    }
    
    .mobile-menu.show { display: flex; }
    
    .mobile-menu .nav-link {
        padding: 14px 16px;
        border-radius: 10px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-body);
    }
    
    .mobile-menu .nav-link:hover { background: var(--bg-gray); color: var(--primary); }
    .mobile-menu .nav-link.active { background: rgba(37,99,235,0.08); color: var(--primary); font-weight: 600; }
    
    .banner-content h1 { font-size: 32px; }
    .banner-stats { gap: 24px; }
    .banner-stat strong { font-size: 24px; }
}

@media (max-width: 768px) {
    .section { padding: 48px 0; }
    .section-head { margin-bottom: 36px; }
    .section-head h2 { font-size: 26px; }
    
    .page-banner { padding: 56px 0 48px; }
    .page-banner .banner-content h1 { font-size: 28px; }
    .page-banner .banner-content p { font-size: 15px; }
    
    .steps-grid { grid-template-columns: 1fr; gap: 16px; }
    .guide-grid { grid-template-columns: 1fr; }
    .tips-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-box { padding: 40px 24px; }
    .cta-box h2 { font-size: 24px; }
    .hot-list-item { flex-direction: column; align-items: flex-start; padding: 18px 20px; }
    .hot-meta { width: 100%; justify-content: space-between; gap: 8px; }
    .banner-stats { gap: 12px; }
    .banner-stat { min-width: 80px; }
}

@media (max-width: 520px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .header-inner { padding: 0 16px; }
    .btn-header { padding: 8px 16px; font-size: 13px; }
    .banner-content h1 { font-size: 24px; }
    .banner-tag { font-size: 12px; }
    .banner-stat strong { font-size: 20px; }
    .banner-stat span { font-size: 12px; }
    .banner-stats { gap: 16px; }
    .step-card { padding: 24px 20px; }
    .guide-card .card-body { padding: 20px; }
    .faq-question { padding: 18px 20px; font-size: 14px; }
    .faq-answer-inner { padding: 0 20px 18px; }
    .cta-box { padding: 32px 20px; border-radius: var(--radius-lg); }
    .cta-box h2 { font-size: 22px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category3 */
:root {
  --primary: #4f6ef7;
  --primary-dark: #3b55d8;
  --primary-soft: #eef1fe;
  --accent: #12b8a6;
  --accent-dark: #0c9c8d;
  --accent-soft: #e5faf7;
  --bg: #f6f7fc;
  --surface: #ffffff;
  --text: #1a1e30;
  --text-weak: #626980;
  --text-faint: #9aa0b5;
  --border: #e5e8f2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 2px 10px rgba(30, 35, 80, .06);
  --shadow-md: 0 10px 32px rgba(30, 35, 80, .09);
  --shadow-lg: 0 20px 50px rgba(30, 35, 80, .13);
  --header-h: 74px;
  --section-space: 96px;
  --container-w: 1180px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
input {
  font-family: inherit;
  border: none;
  outline: none;
}
ul, ol {
  list-style: none;
}
.container {
  width: min(100% - 48px, var(--container-w));
  margin-inline: auto;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 12px 20px;
  z-index: 9999;
  border-radius: 0 0 10px 0;
}
.skip-link:focus {
  left: 0;
}
.section-space {
  padding: var(--section-space) 0;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 12px;
}
.section-sub {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.7;
}
.section-line {
  width: 44px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin: 0 auto 18px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(79, 110, 247, .35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 10px 28px rgba(59, 85, 216, .4);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(79, 110, 247, .3);
}
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229, 232, 242, .8);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(79, 110, 247, .4);
}
.logo-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.3px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}
.main-nav .nav-link {
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  transition: all .2s ease;
}
.main-nav .nav-link:hover {
  color: var(--text);
  background: var(--bg);
}
.main-nav .nav-link.active {
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
.command-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  min-width: 180px;
  transition: all .25s ease;
}
.command-search:hover,
.command-search:focus-within {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.command-search svg {
  width: 16px;
  height: 16px;
  color: var(--text-faint);
  flex-shrink: 0;
}
.command-search input {
  background: transparent;
  font-size: 14px;
  color: var(--text);
  width: 100%;
}
.command-search input::placeholder {
  color: var(--text-faint);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.menu-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--text);
}

.page-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 88px 0 72px;
  isolation: isolate;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 20, 40, .82) 0%, rgba(30, 40, 80, .65) 55%, rgba(79, 110, 247, .45) 100%);
  z-index: -1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, .75);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: rgba(255, 255, 255, .85);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb-sep {
  opacity: .5;
}
.page-title {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -1px;
}
.page-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, .85);
  max-width: 620px;
  line-height: 1.7;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 38px;
}
.filter-btn {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-weak);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all .22s ease;
}
.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}
.filter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(79, 110, 247, .3);
}

.news-section {
  padding: 72px 0 48px;
}
.news-section .section-title,
.news-section .section-sub {
  text-align: center;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.news-item {
  display: flex;
  align-items: stretch;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s ease;
  box-shadow: var(--shadow-sm);
}
.news-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.news-cover {
  width: 260px;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}
.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.news-item:hover .news-cover img {
  transform: scale(1.05);
}
.news-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .18), transparent 55%);
  pointer-events: none;
}
.news-body {
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.news-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 13px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  background: var(--primary-soft);
  color: var(--primary);
  letter-spacing: 0.2px;
}
.news-date {
  font-size: 13.5px;
  color: var(--text-faint);
}
.news-views {
  font-size: 13px;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.news-body h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 8px;
  color: var(--text);
  transition: color .2s ease;
}
.news-body h3 a:hover {
  color: var(--primary);
}
.news-summary {
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .25s ease;
}
.news-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}
.news-read {
  font-size: 13px;
  color: var(--text-faint);
  margin-left: auto;
}

.featured-section {
  padding: 72px 0 80px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.topic-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all .3s ease;
  box-shadow: var(--shadow-sm);
}
.topic-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: transparent;
}
.topic-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.topic-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.topic-card:hover .topic-cover img {
  transform: scale(1.06);
}
.topic-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 20, 40, .45), transparent 60%);
}
.topic-tag {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, .88);
  color: var(--primary);
  backdrop-filter: blur(6px);
}
.topic-body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.topic-body h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text);
}
.topic-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.65;
  margin-bottom: 18px;
  flex: 1;
}
.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.topic-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.stats-section {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  isolation: isolate;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20, 25, 55, .94) 0%, rgba(35, 45, 95, .88) 60%, rgba(18, 184, 166, .72) 100%);
  z-index: -1;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item {
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-lg);
  padding: 34px 22px;
  backdrop-filter: blur(10px);
  transition: all .35s ease;
}
.stat-item:hover {
  background: rgba(255, 255, 255, .18);
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, .3);
}
.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 6px;
  letter-spacing: -1px;
}
.stat-label {
  font-size: 14.5px;
  color: rgba(255, 255, 255, .8);
}

.subscribe-section {
  padding: 72px 0 80px;
}
.subscribe-cta {
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 50%, var(--accent-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 52px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.subscribe-cta::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -90px;
  width: 220px;
  height: 220px;
  background: rgba(255, 255, 255, .08);
  border-radius: 50%;
  pointer-events: none;
}
.subscribe-info {
  flex: 1;
  max-width: 460px;
}
.subscribe-info h2 {
  color: #fff;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}
.subscribe-info p {
  color: rgba(255, 255, 255, .85);
  font-size: 15px;
  line-height: 1.7;
}
.subscribe-form {
  flex: 1;
  max-width: 430px;
  display: flex;
  gap: 10px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 999px;
  padding: 6px 6px 6px 22px;
  backdrop-filter: blur(8px);
}
.subscribe-form input {
  flex: 1;
  background: transparent;
  font-size: 15px;
  color: #fff;
  min-width: 0;
}
.subscribe-form input::placeholder {
  color: rgba(255, 255, 255, .6);
}
.subscribe-form .btn {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .15);
  border-radius: 999px;
  padding: 10px 24px;
  font-weight: 700;
}
.subscribe-form .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, .2);
}

.faq-section {
  padding: 72px 0 90px;
  background: var(--surface);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow .25s ease;
}
.faq-item:hover {
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  transition: color .2s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 400;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .3s ease;
  line-height: 1;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-answer {
  padding: 0 26px 22px;
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.75;
}
.faq-answer a {
  color: var(--primary);
  font-weight: 500;
}
.faq-answer a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.site-footer {
  background: #141829;
  color: rgba(255, 255, 255, .72);
  padding: 64px 0 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand .logo-name {
  color: #fff;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .58);
  max-width: 300px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li {
  font-size: 14px;
}
.footer-col ul a {
  color: rgba(255, 255, 255, .62);
  transition: all .2s ease;
}
.footer-col ul a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}

@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }
  .command-search {
    min-width: 140px;
  }
  .topic-grid {
    gap: 18px;
  }
  .stats-grid {
    gap: 20px;
  }
  .subscribe-cta {
    flex-direction: column;
    text-align: center;
    padding: 40px 30px;
  }
  .subscribe-info {
    max-width: none;
  }
  .subscribe-form {
    max-width: 100%;
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-space: 64px;
    --header-h: 64px;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 6px;
    border-top: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(30, 35, 80, .12);
    display: none;
    z-index: 99;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-link {
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 16px;
  }
  .main-nav .nav-link.active {
    color: var(--primary);
    background: var(--primary-soft);
  }
  .command-search {
    display: none;
  }
  .header-actions .btn {
    padding: 10px 18px;
    font-size: 14px;
  }
  .page-banner {
    padding: 64px 0 52px;
  }
  .page-title {
    font-size: 32px;
  }
  .page-desc {
    font-size: 15.5px;
  }
  .news-cover {
    width: 200px;
  }
  .news-body {
    padding: 20px 22px;
  }
  .news-body h3 {
    font-size: 17px;
  }
  .topic-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-inline: auto;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-brand p {
    max-width: none;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 32px, var(--container-w));
  }
  .section-title {
    font-size: 26px;
  }
  .header-actions .btn {
    display: none;
  }
  .page-banner {
    padding: 48px 0 40px;
  }
  .breadcrumb {
    font-size: 13px;
  }
  .page-title {
    font-size: 27px;
  }
  .filter-bar {
    gap: 8px;
  }
  .filter-btn {
    padding: 8px 15px;
    font-size: 13px;
  }
  .news-item {
    flex-direction: column;
  }
  .news-cover {
    width: 100%;
    height: 170px;
  }
  .news-body {
    padding: 18px;
  }
  .news-body h3 {
    font-size: 16.5px;
  }
  .news-summary {
    -webkit-line-clamp: 3;
  }
  .news-footer {
    flex-wrap: wrap;
  }
  .news-read {
    margin-left: 0;
  }
  .topic-body {
    padding: 20px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-item {
    padding: 24px 14px;
  }
  .stat-num {
    font-size: 30px;
  }
  .subscribe-cta {
    padding: 32px 20px;
  }
  .subscribe-form {
    flex-direction: column;
    background: transparent;
    border: none;
    gap: 12px;
    padding: 0;
  }
  .subscribe-form input {
    background: rgba(255, 255, 255, .16);
    border: 1px solid rgba(255, 255, 255, .25);
    border-radius: 999px;
    padding: 14px 20px;
  }
  .subscribe-form .btn {
    width: 100%;
  }
  .faq-item summary {
    padding: 18px 18px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 18px 18px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}