/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1E6FD9;
  --primary-dark: #1559B3;
  --primary-light: #EAF1FA;
  --primary-alpha: rgba(30,111,217,.08);
  --secondary: #10A37F;
  --secondary-light: #E6F7F2;
  --accent: #F59E0B;
  --accent-dark: #D97E06;
  --accent-light: #FFF4E0;
  --bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --title-color: #14213D;
  --body-color: #33455C;
  --muted-color: #66788C;
  --light-muted: #9AAAB9;
  --border-color: #E3EAF2;
  --dark-bg: #14213D;
  --dark-bg-2: #0F1E32;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 16px rgba(30,111,217,.06);
  --shadow-hover: 0 14px 30px rgba(30,111,217,.10);
  --shadow-btn: 0 6px 16px rgba(30,111,217,.22);
  --font-family: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --transition: all .3s ease;
}

/* ===== Reset / Base ===== */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body { font-family:var(--font-family); background:var(--bg); color:var(--body-color); line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased; }
img { max-width:100%; height:auto; display:block; border:0; }
a { color:var(--primary); text-decoration:none; transition:var(--transition); }
a:hover { color:var(--primary-dark); }
a:focus-visible { outline:2px solid rgba(30,111,217,.5); outline-offset:2px; border-radius:4px; }
ul,ol { list-style:none; }
button, input, select { font-family:inherit; font-size:inherit; }
button { cursor:pointer; border:none; background:none; }
.grid-container { max-width:1200px; }

/* ===== 按钮 ===== */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 28px; border-radius:var(--radius-md);
  font-weight:600; font-size:15px; line-height:1.2; letter-spacing:.02em;
  transition:var(--transition); border:2px solid transparent;
  text-align:center; white-space:nowrap;
}
.btn:focus-visible { outline:2px solid rgba(30,111,217,.4); outline-offset:2px; }
.btn-primary { background:var(--primary); color:#fff; box-shadow:var(--shadow-btn); }
.btn-primary:hover { background:var(--primary-dark); color:#fff; transform:translateY(-2px); box-shadow:0 10px 24px rgba(30,111,217,.28); }
.btn-primary:active { transform:translateY(0); box-shadow:0 4px 12px rgba(30,111,217,.2); }
.btn-secondary { background:#fff; color:var(--primary); border-color:#C7D4E2; }
.btn-secondary:hover { background:var(--primary-light); color:var(--primary-dark); border-color:var(--primary); transform:translateY(-2px); }
.btn-secondary:active { transform:translateY(0); }
.btn-accent { background:var(--accent); color:#14213D; box-shadow:0 6px 16px rgba(245,158,11,.25); }
.btn-accent:hover { background:var(--accent-dark); color:#fff; transform:translateY(-2px); box-shadow:0 10px 24px rgba(245,158,11,.32); }
.btn-outline { background:transparent; color:#fff; border-color:rgba(255,255,255,.7); }
.btn-outline:hover { background:rgba(255,255,255,.12); color:#fff; border-color:#fff; transform:translateY(-2px); }
.btn-lg { padding:16px 36px; font-size:16px; border-radius:12px; }
.btn-sm { padding:6px 16px; font-size:13px; border-radius:8px; }
.btn-block { width:100%; }

/* ===== 文本链接 ===== */
.text-link { display:inline-flex; align-items:center; gap:6px; font-weight:600; color:var(--primary); font-size:14px; transition:var(--transition); }
.text-link:hover { color:var(--primary-dark); }
.text-link .arrow { transition:transform .3s ease; }
.text-link:hover .arrow { transform:translateX(4px); }

/* ===== Header 导航 ===== */
.site-header {
  position:fixed; top:0; left:0; right:0; z-index:200;
  background:var(--card-bg); box-shadow:0 1px 4px rgba(20,33,61,.06);
  height:72px; display:flex; align-items:center;
  transition:box-shadow .3s ease;
}
.site-header.scrolled { box-shadow:0 4px 20px rgba(20,33,61,.1); }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:72px; }
.site-logo { display:flex; align-items:center; gap:8px; font-size:22px; font-weight:800; color:var(--title-color); letter-spacing:-.02em; }
.site-logo:hover { color:var(--primary); }
.site-logo .logo-icon { font-size:26px; }
.site-logo .logo-text { background:linear-gradient(135deg,var(--primary),var(--primary-dark)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.main-nav { display:flex; align-items:center; gap:4px; }
.main-nav ul { display:flex; gap:2px; }
.main-nav a {
  display:block; padding:8px 16px; border-radius:var(--radius-pill);
  color:var(--body-color); font-weight:500; font-size:15px;
  transition:var(--transition); position:relative;
}
.main-nav a:hover { background:rgba(30,111,217,.06); color:var(--primary); }
.main-nav a.active { color:var(--primary); background:rgba(30,111,217,.08); font-weight:600; }
.main-nav a.active::after {
  content:''; position:absolute; left:16px; right:16px; bottom:2px;
  height:2px; background:var(--primary); border-radius:2px;
  animation:fadeIn .3s ease;
}
@keyframes fadeIn { from{opacity:0; transform:scaleX(.6);} to{opacity:1; transform:scaleX(1);} }
.header-actions { display:flex; align-items:center; gap:12px; }
.btn-header { padding:10px 22px; font-size:14px; border-radius:var(--radius-pill); }
.menu-toggle { display:none; width:44px; height:44px; border-radius:10px; align-items:center; justify-content:center; background:var(--bg); }
.menu-toggle:hover { background:var(--primary-light); }
.menu-toggle span { display:block; width:20px; height:2px; background:var(--title-color); margin:3px 0; transition:var(--transition); }
.menu-toggle.active span:nth-child(1) { transform:translateY(5px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity:0; }
.menu-toggle.active span:nth-child(3) { transform:translateY(-5px) rotate(-45deg); }

/* ===== 移动端下拉菜单 ===== */
.mobile-menu {
  position:fixed; top:72px; left:0; right:0; z-index:190;
  background:var(--card-bg); border-top:1px solid var(--border-color);
  box-shadow:0 12px 30px rgba(20,33,61,.12);
  padding:16px 20px; display:none;
  transform:translateY(-8px); opacity:0;
  transition:var(--transition);
}
.mobile-menu.open { display:block; transform:translateY(0); opacity:1; }
.mobile-menu a {
  display:block; padding:12px 16px; border-radius:var(--radius-md);
  color:var(--body-color); font-weight:500; font-size:16px;
}
.mobile-menu a:hover { background:var(--primary-light); color:var(--primary); }
.mobile-menu a.active { color:var(--primary); background:var(--primary-light); font-weight:600; }

/* ===== Hero ===== */
.hero {
  position:relative; padding:140px 0 96px; margin-top:72px;
  background:linear-gradient(135deg,var(--primary-light) 0%,var(--bg) 100%);
  overflow:hidden;
}
.hero::before {
  content:''; position:absolute; top:-60px; right:-60px; width:300px; height:300px;
  border-radius:50%; background:rgba(30,111,217,.06);
}
.hero::after {
  content:''; position:absolute; bottom:-100px; left:40%; width:400px; height:400px;
  background:radial-gradient(circle,rgba(30,111,217,.04) 0%,transparent 70%);
}
.hero .grid-container { position:relative; z-index:2; }
.hero h1 {
  font-size:46px; font-weight:800; color:var(--title-color);
  line-height:1.2; letter-spacing:-.02em; margin-bottom:18px;
}
.hero-subtitle { font-size:17px; color:var(--muted-color); line-height:1.7; max-width:520px; margin-bottom:32px; }
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; margin-bottom:20px; }
.hero-platforms { font-size:13px; color:var(--light-muted); display:flex; align-items:center; gap:8px; }
.hero-platforms a { color:var(--muted-color); padding:2px 8px; border-radius:6px; background:rgba(255,255,255,.6); }
.hero-image {
  position:relative; border-radius:var(--radius-lg); overflow:hidden;
  box-shadow:var(--shadow-hover); aspect-ratio:4/3;
}
.hero-image img { width:100%; height:100%; object-fit:cover; }
.hero-image-caption {
  position:absolute; bottom:0; left:0; right:0; padding:12px 20px;
  background:linear-gradient(to top,rgba(20,33,61,.75),transparent);
  color:#fff; font-size:14px; font-weight:500;
  display:flex; align-items:center; gap:6px;
}

/* ===== 通用 Section ===== */
.site-section { padding:88px 0; }
.section-title-wrap { text-align:center; margin-bottom:48px; }
.section-title-wrap .section-tag { display:inline-block; padding:4px 14px; background:var(--primary-alpha); color:var(--primary); border-radius:var(--radius-pill); font-size:13px; font-weight:600; margin-bottom:10px; }
.section-title { font-size:34px; font-weight:700; color:var(--title-color); line-height:1.3; letter-spacing:-.01em; margin-bottom:10px; }
.section-subtitle { font-size:16px; color:var(--muted-color); max-width:620px; margin:0 auto; text-align:center; }

/* ===== 快速入口条 ===== */
.quick-entry { padding:0 0 88px; margin-top:-40px; }
.quick-card {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius-lg); padding:24px 28px;
  display:flex; gap:20px; align-items:flex-start;
  box-shadow:var(--shadow-card); height:100%;
  transition:var(--transition);
}
.quick-card:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); border-color:var(--primary); }
.quick-card .quick-icon {
  width:52px; height:52px; flex-shrink:0;
  background:var(--primary-light); border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  color:var(--primary);
}
.quick-card h3 { font-size:18px; font-weight:600; color:var(--title-color); margin-bottom:4px; }
.quick-card p { font-size:14px; color:var(--muted-color); margin-bottom:10px; }
.quick-card .text-link { font-size:14px; }

/* ===== 轮播 ===== */
.carousel-section { background:var(--card-bg); border-top:1px solid var(--border-color); border-bottom:1px solid var(--border-color); }
.carousel-wrap { position:relative; max-width:960px; margin:0 auto; }
.carousel-track { display:flex; overflow:hidden; border-radius:var(--radius-lg); box-shadow:var(--shadow-hover); }
.carousel-slide { flex-shrink:0; width:100%; display:grid; grid-template-columns:1.1fr 1fr; min-height:340px; background:var(--card-bg); }
.carousel-slide .slide-img { width:100%; height:100%; min-height:340px; }
.carousel-slide .slide-img img { width:100%; height:100%; object-fit:cover; }
.carousel-slide .slide-body { padding:40px; display:flex; flex-direction:column; justify-content:center; }
.carousel-slide .slide-body h3 { font-size:24px; font-weight:700; color:var(--title-color); margin-bottom:14px; }
.carousel-slide .slide-body p { font-size:15px; color:var(--muted-color); line-height:1.7; margin-bottom:16px; }
.carousel-slide .slide-list li { display:flex; align-items:center; gap:8px; font-size:14px; color:var(--body-color); padding:4px 0; }
.carousel-slide .slide-list svg { color:var(--secondary); flex-shrink:0; }
.carousel-controls { display:flex; justify-content:center; align-items:center; gap:16px; margin-top:24px; }
.carousel-btn {
  width:44px; height:44px; border-radius:50%; background:var(--card-bg);
  border:1px solid var(--border-color); box-shadow:var(--shadow-card);
  display:flex; align-items:center; justify-content:center; color:var(--primary);
  transition:var(--transition);
}
.carousel-btn:hover { background:var(--primary); color:#fff; transform:scale(1.05); }
.carousel-dots { display:flex; gap:8px; }
.carousel-dot { width:8px; height:8px; border-radius:50%; background:var(--border-color); transition:var(--transition); cursor:pointer; }
.carousel-dot.active { background:var(--primary); width:24px; border-radius:4px; }

/* ===== 系统要求 ===== */
.requirements-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:28px; }
.requirement-card {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius-lg); padding:32px; box-shadow:var(--shadow-card);
  transition:var(--transition);
}
.requirement-card:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); }
.requirement-card h3 { font-size:20px; font-weight:600; color:var(--title-color); margin-bottom:20px; display:flex; align-items:center; gap:10px; }
.requirement-card h3 .req-icon { width:40px; height:40px; background:var(--primary-light); border-radius:10px; display:flex; align-items:center; justify-content:center; color:var(--primary); }
.requirement-list li { display:flex; align-items:center; gap:12px; padding:12px 0; border-bottom:1px dashed var(--border-color); font-size:15px; color:var(--body-color); }
.requirement-list li:last-child { border-bottom:none; }
.requirement-list .req-ok { color:var(--secondary); flex-shrink:0; }
.requirement-card .text-link { margin-top:16px; }

/* ===== 评价墙 ===== */
.testimonials-section { background:var(--primary-light); }
.testimonials-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.review-card {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius-lg); padding:28px; box-shadow:var(--shadow-card);
  transition:var(--transition); display:flex; flex-direction:column; gap:14px;
}
.review-card:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); }
.review-stars { display:flex; gap:2px; color:var(--accent); }
.review-text { font-size:15px; color:var(--body-color); line-height:1.7; flex-grow:1; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
.review-author { display:flex; align-items:center; gap:12px; }
.review-avatar {
  width:42px; height:42px; border-radius:50%;
  background:var(--primary-light); color:var(--primary);
  display:flex; align-items:center; justify-content:center;
  font-size:16px; font-weight:600; flex-shrink:0;
}
.review-name { font-size:15px; font-weight:600; color:var(--title-color); }
.review-time { font-size:13px; color:var(--light-muted); }

/* ===== CMS 资讯 ===== */
.cms-news-section { background:var(--bg); }
.news-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.cms-news-item {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius-lg); overflow:hidden;
  box-shadow:var(--shadow-card); transition:var(--transition);
  display:flex; flex-direction:column;
}
.cms-news-item:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); border-color:var(--primary); }
.news-thumb { position:relative; aspect-ratio:16/10; overflow:hidden; display:block; }
.news-thumb img { width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.cms-news-item:hover .news-thumb img { transform:scale(1.04); }
.news-thumb-placeholder { width:100%; height:100%; background:var(--primary-light); display:flex; align-items:center; justify-content:center; color:var(--primary); }
.news-body { padding:20px 24px 24px; flex:1; display:flex; flex-direction:column; }
.news-cat { display:inline-block; padding:3px 10px; background:var(--primary-alpha); color:var(--primary); border-radius:var(--radius-pill); font-size:12px; font-weight:600; margin-bottom:10px; font-style:normal; }
.news-title { font-size:18px; font-weight:600; color:var(--title-color); line-height:1.4; margin-bottom:8px; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.news-title a { color:inherit; }
.news-title a:hover { color:var(--primary); }
.news-excerpt { font-size:14px; color:var(--muted-color); line-height:1.6; margin-bottom:14px; flex-grow:1; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
.news-meta { display:flex; align-items:center; gap:12px; font-size:13px; color:var(--light-muted); border-top:1px solid var(--border-color); padding-top:14px; margin-top:auto; }
.news-time { display:flex; align-items:center; gap:4px; }
.news-more { margin-left:auto; color:var(--primary); font-weight:500; font-size:13px; }
.news-more:hover { color:var(--primary-dark); }
.empty-state {
  text-align:center; padding:60px 20px; grid-column:1/-1;
  background:var(--card-bg); border:1px dashed var(--border-color);
  border-radius:var(--radius-lg); color:var(--muted-color);
}
.empty-state .empty-icon { font-size:48px; margin-bottom:12px; }

/* ===== FAQ ===== */
.faq-section { background:var(--card-bg); }
.faq-list { max-width:780px; margin:0 auto; display:flex; flex-direction:column; gap:14px; }
.faq-item {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:12px; overflow:hidden; transition:var(--transition);
}
.faq-item:hover { border-color:var(--primary); box-shadow:var(--shadow-card); }
.faq-item[open] { border-color:var(--primary); box-shadow:var(--shadow-card); background:var(--bg); }
.faq-item summary {
  display:flex; justify-content:space-between; align-items:center;
  padding:18px 24px; font-size:16px; font-weight:600; color:var(--title-color);
  cursor:pointer; list-style:none; position:relative;
}
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after {
  content:'+'; font-size:22px; font-weight:400; color:var(--primary);
  transition:transform .3s ease; width:24px; text-align:center; flex-shrink:0;
}
.faq-item[open] summary::after { transform:rotate(45deg); }
.faq-item .faq-answer { padding:0 24px 18px; font-size:15px; color:var(--body-color); line-height:1.75; }

/* ===== 下载 CTA ===== */
.download-cta { padding:56px 0; }
.download-cta .cta-box {
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  border-radius:24px; padding:56px 48px; text-align:center;
  position:relative; overflow:hidden;
  box-shadow:0 20px 50px rgba(30,111,217,.25);
}
.download-cta .cta-box::before {
  content:''; position:absolute; top:-40px; right:-40px; width:200px; height:200px;
  border-radius:50%; background:rgba(255,255,255,.06);
}
.download-cta .cta-box::after {
  content:''; position:absolute; bottom:-60px; left:-20px; width:180px; height:180px;
  border-radius:50%; background:rgba(255,255,255,.04);
}
.cta-box h2 { color:#fff; font-size:32px; font-weight:700; margin-bottom:12px; position:relative; z-index:2; }
.cta-box .cta-sub { color:rgba(255,255,255,.85); font-size:16px; margin-bottom:28px; position:relative; z-index:2; }
.cta-buttons { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; position:relative; z-index:2; }
.cta-platforms { color:rgba(255,255,255,.75); font-size:13px; margin-top:20px; position:relative; z-index:2; }

/* ===== 页脚 ===== */
.site-footer { background:var(--dark-bg); color:rgba(255,255,255,.75); padding:56px 0 40px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1.5fr; gap:48px; margin-bottom:40px; }
.footer-logo { display:flex; align-items:center; gap:8px; font-size:20px; font-weight:800; color:#fff; margin-bottom:14px; }
.footer-logo .logo-icon { color:var(--accent); }
.footer-desc { font-size:14px; color:rgba(255,255,255,.65); line-height:1.7; max-width:320px; }
.footer-col h4 { color:#fff; font-size:16px; font-weight:600; margin-bottom:16px; }
.footer-col ul li { margin-bottom:10px; }
.footer-col ul a { color:rgba(255,255,255,.75); font-size:14px; transition:var(--transition); }
.footer-col ul a:hover { color:var(--accent); padding-left:4px; }
.footer-contact li { display:flex; align-items:center; gap:8px; font-size:14px; color:rgba(255,255,255,.65); margin-bottom:12px; }
.footer-bottom {
  border-top:1px solid rgba(255,255,255,.12); padding-top:24px;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  font-size:13px; color:rgba(255,255,255,.5);
}
.footer-bottom a { color:rgba(255,255,255,.65); }
.footer-bottom a:hover { color:#fff; }

/* ===== 移动端底部 Tab ===== */
.mobile-tab-bar {
  display:none; position:fixed; bottom:0; left:0; right:0; z-index:300;
  background:var(--card-bg); border-top:1px solid var(--border-color);
  height:64px; padding:0 8px; padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -2px 16px rgba(20,33,61,.08);
}
.mobile-tab-bar .tab-inner { display:flex; justify-content:space-around; align-items:center; height:64px; }
.tab-item {
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:2px; padding:6px 16px; border-radius:12px; color:var(--muted-color);
  font-size:11px; font-weight:500; transition:var(--transition);
}
.tab-item svg { width:22px; height:22px; }
.tab-item:hover { color:var(--primary); }
.tab-item.active { color:var(--primary); background:var(--primary-light); font-weight:600; }

/* ===== 响应式断点 ===== */
@media (max-width:1024px) {
  .hero h1 { font-size:38px; }
  .hero { padding:120px 0 72px; }
  .site-section { padding:72px 0; }
}

@media (max-width:768px) {
  .site-header { height:64px; }
  .header-inner { height:64px; position:relative; }
  .main-nav { display:none; }
  .header-actions .btn-header { display:none; }
  .menu-toggle { display:flex; }
  .hero { padding:100px 0 56px; margin-top:64px; }
  .hero h1 { font-size:32px; line-height:1.25; }
  .hero-subtitle { font-size:16px; margin-bottom:24px; }
  .hero-image { aspect-ratio:16/10; margin-top:28px; }
  .hero-buttons .btn { flex:1; min-width:0; padding:14px 18px; font-size:14px; }
  .quick-entry { padding-bottom:56px; margin-top:-24px; }
  .quick-card { padding:18px 20px; gap:14px; }
  .site-section { padding:56px 0; }
  .section-title { font-size:26px; }
  .section-subtitle { font-size:15px; }
  .carousel-slide { grid-template-columns:1fr; }
  .carousel-slide .slide-img { min-height:0; aspect-ratio:16/10; }
  .carousel-slide .slide-body { padding:24px; }
  .carousel-slide .slide-body h3 { font-size:20px; }
  .requirements-grid { grid-template-columns:1fr; gap:20px; }
  .testimonials-grid { grid-template-columns:1fr; gap:20px; }
  .news-grid { grid-template-columns:1fr; gap:20px; }
  .download-cta .cta-box { padding:40px 24px; }
  .cta-box h2 { font-size:24px; }
  .footer-grid { grid-template-columns:1fr; gap:32px; }
  .footer-bottom { flex-direction:column; text-align:center; gap:8px; }
  .mobile-tab-bar { display:block; }
  body { padding-bottom:calc(64px + env(safe-area-inset-bottom)); }
  .footer-extra-space { height:64px; }
}

@media (max-width:520px) {
  .hero h1 { font-size:28px; }
  .hero-buttons { flex-direction:column; gap:12px; }
  .hero-buttons .btn { width:100%; }
  .hero-platforms { flex-wrap:wrap; gap:4px; }
  .carousel-slide .slide-body h3 { font-size:18px; }
  .download-cta .cta-box { border-radius:16px; }
  .cta-buttons .btn { width:100%; }
  .review-card { padding:20px; }
  .news-body { padding:16px 18px 18px; }
  .faq-item summary { padding:16px 18px; font-size:15px; }
  .faq-item .faq-answer { padding:0 18px 16px; font-size:14px; }
}

/* roulang page: article */
:root {
  --primary: #1E6FD9;
  --primary-dark: #1559B3;
  --primary-light: #EAF1FA;
  --accent: #10A37F;
  --amber: #F59E0B;
  --bg: #F6F8FB;
  --card: #FFFFFF;
  --heading: #14213D;
  --body: #33455C;
  --muted: #66788C;
  --border: #E3EAF2;
  --border-dark: #C7D4E2;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 16px rgba(30,111,217,.06);
  --shadow-hover: 0 14px 30px rgba(30,111,217,.10);
  --btn-shadow: 0 6px 16px rgba(30,111,217,.22);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: inherit;
}
button,
input {
  font-family: inherit;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
.grid-container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.grid-x {
  display: flex;
  flex-wrap: wrap;
}
.grid-margin-x {
  margin-left: -10px;
  margin-right: -10px;
}
.grid-margin-x > .cell {
  padding-left: 10px;
  padding-right: 10px;
}
.cell {
  flex: 0 0 auto;
}
.small-12 {
  width: 100%;
  max-width: 100%;
  flex-basis: 100%;
}
.medium-6 {
  width: 50%;
  max-width: 50%;
  flex-basis: 50%;
}
.medium-10 {
  width: 83.3333%;
  max-width: 83.3333%;
  flex-basis: 83.3333%;
}
.medium-offset-1 {
  margin-left: 8.3333%;
}
.large-8 {
  width: 66.6667%;
  max-width: 66.6667%;
  flex-basis: 66.6667%;
}
.large-offset-2 {
  margin-left: 16.6667%;
}
@media (max-width: 767.98px) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .grid-margin-x {
    margin-left: 0;
    margin-right: 0;
  }
  .grid-margin-x > .cell {
    padding-left: 0;
    padding-right: 0;
  }
  .medium-6,
  .medium-10,
  .large-8 {
    width: 100%;
    max-width: 100%;
    flex-basis: 100%;
  }
  .medium-offset-1,
  .large-offset-2 {
    margin-left: 0;
  }
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--btn-shadow);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(30,111,217,.28);
}
.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: var(--border-dark);
}
.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}
.btn-link {
  background: transparent;
  color: var(--primary);
  padding: 6px 8px;
  border: 0;
  font-weight: 600;
}
.btn-link:hover {
  gap: 10px;
}
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid rgba(30,111,217,.5);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 24px;
  font-weight: 800;
  color: var(--heading);
  line-height: 1.2;
}
.brand .logo-icon {
  color: var(--primary);
  font-size: 26px;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--body);
  font-weight: 500;
  font-size: 15px;
  transition: background .2s ease, color .2s ease, box-shadow .2s ease;
}
.main-nav a:hover {
  background: rgba(30,111,217,.06);
  color: var(--primary);
}
.main-nav a.active {
  color: var(--primary);
  box-shadow: inset 0 -2px 0 var(--primary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.btn-login {
  margin-left: 4px;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--heading);
  cursor: pointer;
}
.mobile-tabbar {
  display: none;
}
@media (max-width: 767.98px) {
  .header-bar {
    height: 60px;
  }
  .brand {
    font-size: 20px;
  }
  .main-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 24px rgba(20,33,61,.08);
    padding: 12px 16px 18px;
    display: none;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 4px;
  }
  .main-nav a {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
  }
  .main-nav a.active {
    background: var(--primary-light);
    color: var(--primary);
    box-shadow: none;
    border-radius: var(--radius-sm);
  }
  .btn-login {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .mobile-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    z-index: 100;
    background: #fff;
    border-top: 1px solid var(--border);
    height: calc(64px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 12px rgba(20,33,61,.04);
  }
  .tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 11px;
    color: var(--muted);
    text-decoration: none;
    border-radius: 12px;
    margin: 6px 4px;
    transition: background .2s ease, color .2s ease;
  }
  .tab-item svg {
    width: 22px;
    height: 22px;
    stroke-width: 2;
  }
  .tab-item.active {
    color: var(--primary);
    background: var(--primary-light);
  }
  .tab-item:active {
    opacity: .75;
  }
  .site-main {
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
  }
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: 14px;
  color: var(--muted);
  margin: 28px 0 16px;
}
.breadcrumb a {
  color: var(--muted);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  margin: 0 8px;
}
.breadcrumb .current {
  color: var(--body);
  font-weight: 600;
}
.article-post {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 44px 48px;
  margin-bottom: 48px;
}
.article-header {
  margin-bottom: 32px;
}
.article-header h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--heading);
  margin: 0 0 18px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: rgba(30,111,217,.10);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
}
.article-content p {
  margin-bottom: 24px;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.35;
  margin: 48px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--heading);
  margin: 32px 0 12px;
}
.article-content blockquote {
  margin: 0 0 24px;
  padding: 18px 22px;
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  color: var(--heading);
  font-weight: 500;
}
.article-content img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin: 20px 0;
}
.article-content ul,
.article-content ol {
  margin: 0 0 24px;
  padding-left: 20px;
}
.article-content ul {
  list-style: square;
}
.article-content ol {
  list-style: decimal;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  transition: opacity .2s ease;
}
.article-content a:hover {
  opacity: .8;
}
.article-empty {
  text-align: center;
  padding: 56px 24px;
  background: #fff;
  border: 1px dashed var(--border-dark);
  border-radius: var(--radius);
}
.article-empty p {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--muted);
}
.article-empty a {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
}
.article-empty a:hover {
  background: rgba(30,111,217,.14);
}
.article-cta {
  max-width: 760px;
  margin: 40px auto 0;
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}
.article-cta p {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 14px;
}
.article-cta .btn {
  min-width: 140px;
}
.back-to-list {
  max-width: 760px;
  margin: 24px auto 0;
  text-align: center;
}
.back-to-list a {
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.back-to-list a:hover {
  gap: 10px;
}

.related-section {
  background: var(--bg);
  padding: 64px 0 80px;
  border-top: 1px solid var(--border);
}
.related-section .section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 28px;
}
.related-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
  height: 100%;
  display: block;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.related-card .related-body {
  padding: 22px;
}
.related-card h4 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--heading);
  margin: 0 0 10px;
}
.related-card time {
  font-size: 13px;
  color: var(--muted);
}

.site-footer {
  background: #14213D;
  color: #94A3B8;
  padding-top: 52px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 28px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}
.footer-logo .logo-icon {
  color: #60A5FA;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.75;
  margin: 14px 0 0;
  max-width: 340px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 14px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-col a {
  font-size: 14px;
  color: #94A3B8;
  transition: color .2s ease;
}
.footer-col a:hover {
  color: #fff;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  padding: 4px 0;
}
.footer-contact svg {
  color: #60A5FA;
  flex-shrink: 0;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  font-size: 13px;
  color: #64748B;
}
.footer-bottom p {
  margin: 0;
}
@media (max-width: 1023.98px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }
}
@media (max-width: 767.98px) {
  .article-post {
    padding: 28px 20px 32px;
  }
  .article-header h1 {
    font-size: 28px;
  }
  .article-content h2 {
    font-size: 22px;
  }
  .article-content h3 {
    font-size: 18px;
  }
  .related-section {
    padding: 48px 0 56px;
  }
  .related-section .section-title {
    font-size: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 4px;
  }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1E6FD9;
  --primary-dark: #1559B3;
  --primary-darker: #0E3E8F;
  --primary-light: #EAF1FA;
  --secondary: #10A37F;
  --secondary-light: #E6F6F1;
  --accent: #F59E0B;
  --accent-light: #FFF4E0;
  --body-bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --heading: #14213D;
  --text: #33455C;
  --weak: #66788C;
  --muted: #9AAAB9;
  --border: #E3EAF2;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 16px rgba(30,111,217,.06);
  --shadow-hover: 0 14px 30px rgba(30,111,217,.10);
  --shadow-btn: 0 6px 16px rgba(30,111,217,.22);
  --container: 1200px;
  --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --header-h: 72px;
  --tabbar-h: 64px;
}

/* ========== 基础 Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--body-bg);
}
body.no-scroll { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; height: auto; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul { list-style: none; }
h1, h2, h3, h4, h5 { color: var(--heading); line-height: 1.3; font-weight: 700; }

/* ========== 容器与栅格 ========== */
.grid-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.grid-x { display: flex; flex-wrap: wrap; }
.grid-x > .cell { flex: 0 0 auto; min-height: 0; }
.grid-margin-x { margin-left: -12px; margin-right: -12px; }
.grid-margin-x > .cell { padding-left: 12px; padding-right: 12px; }
.small-12 { width: 100%; }
.medium-6 { width: 100%; }
.large-4 { width: 100%; }
.large-6 { width: 100%; }
.align-middle { align-items: center; }

@media (min-width: 768px) {
  .medium-6 { width: 50%; }
}

@media (min-width: 1024px) {
  .large-3 { width: 25%; }
  .large-4 { width: 33.3333%; }
  .large-6 { width: 50%; }
  .large-8 { width: 66.6667%; }
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  transition: background .22s ease, color .22s ease, box-shadow .22s ease, transform .22s ease, border-color .22s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid rgba(30,111,217,.4);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-primary:active { background: var(--primary-darker); transform: translateY(0); }
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border-color: #C7D4E2;
}
.btn-secondary:hover { background: #F0F5FC; border-color: #AFC4DE; }
.btn-secondary:active { background: #E1EBF7; }
.btn-accent {
  background: var(--accent);
  color: #3B2A00;
  box-shadow: 0 6px 16px rgba(245,158,11,.25);
}
.btn-accent:hover { background: #E09000; transform: translateY(-1px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 34px; font-size: 16px; }
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.7);
}
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-text {
  padding: 0;
  color: var(--primary);
  font-weight: 600;
  background: none;
  box-shadow: none;
  gap: 4px;
}
.btn-text:hover { color: var(--primary-dark); }
.btn-text .arrow { transition: transform .22s ease; }
.btn-text:hover .arrow { transform: translateX(4px); }

/* ========== 徽章 / 标签 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  line-height: 1.5;
}
.badge-green {
  background: var(--secondary-light);
  color: #0A7A5F;
}
.badge-amber {
  background: var(--accent-light);
  color: #9A6300;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}
.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ========== 顶部导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  height: var(--header-h);
  box-shadow: 0 1px 0 rgba(20,33,61,.06);
  border-bottom: 1px solid rgba(227,234,242,.8);
}
.header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 22px;
  color: var(--heading);
  letter-spacing: .5px;
}
.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 10px rgba(30,111,217,.25);
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav a {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  transition: background .2s ease, color .2s ease;
}
.main-nav a:hover { background: rgba(30,111,217,.06); color: var(--primary); }
.main-nav a.active { color: var(--primary); font-weight: 600; position: relative; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.main-nav a:focus-visible { outline: 2px solid rgba(30,111,217,.4); outline-offset: 2px; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.nav-burger { display: none; width: 40px; height: 40px; border-radius: 10px; align-items: center; justify-content: center; flex-direction: column; gap: 5px; border: 1px solid var(--border); background: #fff; }
.nav-burger span { display: block; width: 18px; height: 2px; background: var(--heading); border-radius: 2px; transition: transform .25s ease, opacity .25s ease; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 14px 30px rgba(20,33,61,.08);
  padding: 16px 24px 24px;
  z-index: 199;
}
.mobile-menu.open { display: block; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
.mobile-menu a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.mobile-menu .btn { margin-top: 14px; width: 100%; }

/* ========== 移动端底部 Tab ========== */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 220;
  height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--border);
  display: none;
  align-items: center;
  justify-content: space-around;
}
.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--weak);
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 14px;
  transition: color .2s ease, background .2s ease;
}
.tab-item svg { width: 24px; height: 24px; }
.tab-item:hover { color: var(--primary); }
.tab-item.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

/* ========== Hero ========== */
.page-hero {
  padding: calc(var(--header-h) + 72px) 0 64px;
  background: linear-gradient(135deg, #EAF1FA 0%, #F6F8FB 60%);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(30,111,217,.05);
  right: -120px;
  top: -80px;
  pointer-events: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(16,163,127,.04);
  left: -80px;
  bottom: -60px;
  pointer-events: none;
}
.hero-wrap {
  display: flex;
  align-items: center;
  gap: 56px;
  position: relative;
  z-index: 1;
}
.hero-content { flex: 1 1 48%; }
.hero-visual { flex: 1 1 52%; position: relative; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30,111,217,.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.hero-content h1 {
  font-size: 42px;
  font-weight: 800;
  color: var(--heading);
  margin-bottom: 18px;
  line-height: 1.25;
}
.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 28px;
  max-width: 540px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.hero-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--weak);
  font-size: 13px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  aspect-ratio: 16/10;
  object-fit: cover;
}
.hero-visual .hero-flag {
  position: absolute;
  left: 18px;
  bottom: 18px;
  background: rgba(20,33,61,.78);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(4px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero-flag svg { width: 16px; height: 16px; }

/* ========== 快速入口条 ========== */
.quick-entry {
  padding: 56px 0;
  margin-top: -28px;
  position: relative;
  z-index: 2;
}
.entry-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.entry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.entry-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.entry-icon svg { width: 24px; height: 24px; }
.entry-card h3 { font-size: 20px; margin-bottom: 8px; font-weight: 700; }
.entry-card p { font-size: 14px; color: var(--weak); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.entry-card .btn-text { font-size: 14px; }

/* ========== 分类页交替区块 ========== */
.alternate-section { padding: 80px 0; }
.alternate-section:nth-child(even) { background: #fff; }
.alternate-section .alt-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  position: relative;
  aspect-ratio: 16/10;
}
.alternate-section .alt-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.alternate-section .alt-img:hover img { transform: scale(1.02); }
.alt-content { padding-left: 12px; }
.alt-content h2 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.alt-content p { font-size: 16px; color: var(--text); margin-bottom: 18px; line-height: 1.8; }
.check-list { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}
.check-list .check-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--secondary-light);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.check-icon svg { width: 13px; height: 13px; }

/* ========== 设备支持区 ========== */
.support-section { padding: 80px 0; background: #fff; }
.support-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  height: 100%;
  transition: transform .25s ease, box-shadow .25s ease;
}
.support-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.support-card .icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.support-card h3 { font-size: 18px; margin-bottom: 6px; }
.support-card p { font-size: 14px; color: var(--weak); line-height: 1.7; }
.support-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.support-list li { font-size: 14px; color: var(--text); padding-left: 22px; position: relative; }
.support-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--secondary);
}

/* ========== FAQ ========== */
.faq-section { padding: 80px 0; }
.faq-section .section-head { text-align: center; margin-bottom: 40px; }
.faq-section .section-head h2 { font-size: 32px; }
.faq-section .section-head p { color: var(--weak); margin-top: 8px; }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow .2s ease, background .2s ease;
}
.faq-item:hover { box-shadow: var(--shadow-card); }
.faq-item.open { background: #F6F9FD; }
.faq-item .faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  user-select: none;
}
.faq-item .faq-q .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .3s ease, background .3s ease;
}
.faq-item .faq-icon svg { width: 14px; height: 14px; transition: transform .3s ease; }
.faq-item.open .faq-icon { background: var(--primary); color: #fff; }
.faq-item.open .faq-icon svg { transform: rotate(135deg); }
.faq-item .faq-a {
  display: none;
  padding: 0 22px 20px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
}

/* ========== CTA ========== */
.cta-band {
  padding: 20px 0 80px;
}
.cta-inner {
  background: linear-gradient(135deg, var(--primary) 0%, #1559B3 100%);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(30,111,217,.25);
}
.cta-inner::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  right: -80px;
  top: -80px;
}
.cta-inner h2 { color: #fff; font-size: 30px; margin-bottom: 12px; }
.cta-inner p { color: rgba(255,255,255,.85); font-size: 16px; margin-bottom: 28px; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-note { margin-top: 20px; font-size: 13px; color: rgba(255,255,255,.65); display: flex; align-items: center; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-note span { display: inline-flex; align-items: center; gap: 5px; }

/* ========== 页脚 ========== */
.site-footer {
  background: #14213D;
  color: rgba(255,255,255,.72);
  padding-top: 64px;
  padding-bottom: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-logo .logo-icon { font-size: 26px; }
.footer-desc { font-size: 14px; line-height: 1.9; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,.65); transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,.65); }
.footer-contact svg { flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,.45);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero-wrap { gap: 32px; }
  .hero-content h1 { font-size: 34px; }
  .alt-content h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  body { padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom)); }
  .mobile-tabbar { display: flex; }
  .site-header { height: 60px; }
  .header-wrap { height: 60px; }
  .header-actions .btn { display: none; }
  .main-nav { display: none; }
  .nav-burger { display: flex; }
  .page-hero { padding: 100px 0 48px; }
  .hero-wrap { flex-direction: column; gap: 24px; }
  .hero-content h1 { font-size: 32px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .quick-entry { padding: 32px 0; margin-top: 0; }
  .alternate-section { padding: 56px 0; }
  .alternate-section .alt-content { margin-top: 20px; padding-left: 0; }
  .support-section { padding: 56px 0; }
  .faq-section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }
  .cta-inner { padding: 40px 24px; }
  .cta-inner h2 { font-size: 24px; }
  .cta-btns .btn { width: 100%; }
}

@media (max-width: 520px) {
  .grid-container { padding: 0 16px; }
  .hero-content h1 { font-size: 28px; }
  .section-tag { font-size: 12px; }
  .entry-card { padding: 22px; }
  .alt-content h2 { font-size: 22px; }
  .faq-section .section-head h2 { font-size: 26px; }
  .footer-grid { gap: 24px; }
  .cta-btns .btn { width: 100%; }
}

/* roulang page: category2 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1E6FD9;
  --primary-dark: #1559B3;
  --primary-deep: #0F4D9E;
  --primary-light: #EAF1FA;
  --secondary: #10A37F;
  --accent: #F59E0B;
  --accent-dark: #D9820B;
  --bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --text-main: #14213D;
  --text-body: #33455C;
  --text-muted: #66788C;
  --text-placeholder: #9AAAB9;
  --border: #E3EAF2;
  --border-light: #DCE4EE;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-badge: 999px;
  --shadow-card: 0 4px 16px rgba(30, 111, 217, .06);
  --shadow-hover: 0 14px 30px rgba(30, 111, 217, .10);
  --shadow-btn: 0 6px 16px rgba(30, 111, 217, .22);
  --transition: all .3s ease;
}

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

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

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

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

a { text-decoration: none; color: var(--primary); transition: var(--transition); }
a:hover { color: var(--primary-dark); }
a:focus-visible, button:focus-visible { outline: 2px solid rgba(30, 111, 217, .4); outline-offset: 2px; }

ul, ol { list-style: none; }

/* ========== Foundation 栅格兜底 ========== */
.grid-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.grid-x { display: flex; flex-wrap: wrap; }
.cell { flex: 1 1 auto; min-width: 0; }
.small-12 { flex: 0 0 100%; max-width: 100%; }
.medium-6 { flex: 0 0 50%; max-width: 50%; }
.large-5 { flex: 0 0 41.6667%; max-width: 41.6667%; }
.large-6 { flex: 0 0 50%; max-width: 50%; }
.large-7 { flex: 0 0 58.3333%; max-width: 58.3333%; }
.grid-padding-x > .cell { padding-left: 12px; padding-right: 12px; }

/* ========== 顶部导航 ========== */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #fff;
  height: 68px;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(20, 33, 61, .05);
}
.main-header .grid-container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; color: var(--text-main); }
.logo-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; }
.main-nav ul { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; }
.main-nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover { background: rgba(30, 111, 217, .06); color: var(--primary); }
.main-nav a.active { color: var(--primary); font-weight: 600; }
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.nav-cta-right { display: flex; align-items: center; gap: 12px; }
.btn-login-nav {
  padding: 8px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-btn);
  transition: var(--transition);
}
.btn-login-nav:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 8px 20px rgba(30, 111, 217, .28); }

@media (max-width: 767.98px) {
  .main-header { height: 60px; }
  .main-nav { display: none; }
  .nav-cta-right .btn-login-nav { display: none; }
}

/* ========== 移动端底部 Tab ========== */
.mobile-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  background: #fff;
  border-top: 1px solid var(--border);
  height: 64px;
  padding-bottom: env(safe-area-inset-bottom);
}
.mobile-tabbar a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-muted);
  transition: var(--transition);
}
.mobile-tabbar a.active { color: var(--primary); }
.mobile-tabbar a.active .tab-icon-wrap { background: var(--primary-light); }
.mobile-tabbar .tab-icon-wrap {
  width: 40px;
  height: 28px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

@media (min-width: 768px) {
  .mobile-tabbar { display: none; }
}

/* ========== 按钮体系 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(30, 111, 217, .3); }
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid #C7D4E2;
}
.btn-secondary:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); transform: translateY(-2px); }
.btn-accent {
  background: var(--accent);
  color: #14213D;
  box-shadow: 0 6px 16px rgba(245, 158, 11, .3);
}
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(245, 158, 11, .36); }
.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .6);
}
.btn-outline-light:hover { background: rgba(255, 255, 255, .12); color: #fff; border-color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ========== Hero 区 ========== */
.download-hero {
  position: relative;
  padding: 148px 0 80px;
  background: linear-gradient(135deg, #EAF1FA 0%, #F6F8FB 55%, #fff 100%);
  overflow: hidden;
}
.download-hero .hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .18;
}
.download-hero .grid-container { position: relative; }
.download-hero .hero-inner { max-width: 680px; }
.download-hero h1 {
  font-size: 42px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -1px;
}
.download-hero .hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}
.hero-meta .platform-icons { display: flex; gap: 6px; align-items: center; }
.version-badge {
  position: absolute;
  top: 30px;
  right: 30px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
}
.version-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--secondary);
  box-shadow: 0 0 0 3px rgba(16, 163, 127, .15);
}

@media (max-width: 767.98px) {
  .download-hero { padding: 110px 0 56px; }
  .download-hero h1 { font-size: 32px; }
  .download-hero .hero-sub { font-size: 15px; }
  .version-badge { position: static; margin-bottom: 20px; display: inline-flex; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}

/* ========== 版本列表区 ========== */
.version-list-section { padding: 96px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 34px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; letter-spacing: -0.5px; }
.section-head p { font-size: 16px; color: var(--text-muted); max-width: 620px; margin: 0 auto; }

.version-list { display: flex; flex-direction: column; gap: 20px; max-width: 1000px; margin: 0 auto; }

.version-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 24px;
  transition: var(--transition);
}
.version-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.version-thumb {
  width: 110px;
  height: 110px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--primary-light);
}
.version-info { flex: 1; min-width: 0; }
.version-title-row { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; flex-wrap: wrap; }
.version-title-row h3 { font-size: 20px; font-weight: 700; color: var(--text-main); }
.version-tag {
  display: inline-block;
  padding: 2px 12px;
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
}
.tag-new { background: rgba(16, 163, 127, .12); color: var(--secondary); }
.tag-recommend { background: rgba(245, 158, 11, .12); color: #D9820B; }
.tag-stable { background: rgba(30, 111, 217, .1); color: var(--primary); }
.version-meta { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.version-desc { font-size: 14px; color: var(--text-body); line-height: 1.7; }

@media (max-width: 767.98px) {
  .version-list-section { padding: 56px 0; }
  .version-card { flex-direction: column; align-items: flex-start; padding: 20px; }
  .version-thumb { width: 100%; height: 140px; }
  .version-card .btn { width: 100%; }
  .section-head h2 { font-size: 27px; }
}

/* ========== 系统要求 + 下载步骤 ========== */
.system-steps-section {
  padding: 80px 0;
  background: linear-gradient(180deg, #fff 0%, #F0F5FC 100%);
}

.sys-req-card,
.steps-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: var(--shadow-card);
  height: 100%;
}

.sys-req-card h2,
.steps-card h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  position: relative;
  padding-left: 16px;
}
.sys-req-card h2::before,
.steps-card h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 22px;
  border-radius: 4px;
  background: var(--primary);
}

.sys-list { display: flex; flex-direction: column; }
.sys-list-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--border-light);
}
.sys-list-item:last-child { border-bottom: none; }
.sys-list-item .sys-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary);
}
.sys-list-item .sys-text { flex: 1; }
.sys-list-item .sys-text strong { display: block; font-size: 15px; font-weight: 600; color: var(--text-main); }
.sys-list-item .sys-text span { font-size: 14px; color: var(--text-muted); }

.step-timeline { position: relative; padding-left: 8px; }
.step-timeline::before {
  content: '';
  position: absolute;
  left: 21px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), rgba(30, 111, 217, .15));
  border-radius: 2px;
}
.step-item { position: relative; padding: 0 0 36px 56px; }
.step-item:last-child { padding-bottom: 0; }
.step-dot {
  position: absolute;
  left: 8px;
  top: 4px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(30, 111, 217, .25);
  z-index: 1;
}
.step-item h4 { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; }
.step-item p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

@media (max-width: 767.98px) {
  .system-steps-section { padding: 56px 0; }
  .sys-req-card, .steps-card { padding: 24px; margin-bottom: 20px; }
  .sys-req-card h2, .steps-card h2 { font-size: 20px; }
}

/* ========== 底部 CTA 区 ========== */
.cta-band { padding: 72px 0; background: var(--bg); }
.cta-inner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 24px;
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-inner::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .06);
}
.cta-inner h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; letter-spacing: -0.5px; }
.cta-inner p { font-size: 16px; color: rgba(255, 255, 255, .85); margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 1; }

@media (max-width: 767.98px) {
  .cta-band { padding: 56px 0; }
  .cta-inner { padding: 40px 24px; }
  .cta-inner h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
}

/* ========== 页脚 ========== */
.site-footer { background: #14213D; color: rgba(255, 255, 255, .8); padding: 64px 0 32px; margin-bottom: 64px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
.footer-logo span { font-size: 20px; font-weight: 700; color: #fff; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, .6); max-width: 360px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255, 255, 255, .6); font-size: 14px; transition: var(--transition); }
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 8px; color: rgba(255, 255, 255, .6); font-size: 14px; margin-bottom: 12px; }
.footer-contact svg { color: var(--primary); flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, .4);
}

@media (max-width: 767.98px) {
  .site-footer { padding: 48px 0 24px; margin-bottom: 64px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .grid-container { padding: 0 16px; }
  .download-hero h1 { font-size: 28px; }
  .hero-sub { font-size: 14px; }
  .version-title-row h3 { font-size: 17px; }
  .cta-inner { padding: 32px 20px; }
}