/* roulang page: index */
/* ============================================================
   kiayun官网 设计变量
   --primary: 墨岩黑   --accent: 暖金   --bg-warm: 暖灰白
   圆角统一 4/6/12px，阴影温和，全站禁蓝紫渐变
   ============================================================ */
:root{
  --primary:#1E232B;
  --accent:#C9A063;
  --accent-hover:#B89357;
  --accent-soft:rgba(201,160,99,.12);
  --accent-text:#8A6E3E;
  --bg-warm:#F7F5F2;
  --bg-white:#FFFFFF;
  --text-dark:#2A2E35;
  --text-mid:#6B7280;
  --text-light:#9CA3AF;
  --border:#E8E4DE;
  --shadow-sm:0 2px 8px rgba(30,35,43,.06);
  --shadow-hover:0 8px 24px rgba(30,35,43,.12);
  --radius-sm:4px;
  --radius-md:6px;
  --radius-lg:12px;
  --space-section:96px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-en:Inter,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text-dark);
  background:var(--bg-warm);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-md)}
a{color:var(--text-dark);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{list-style:none}
h1,h2,h3,h4{font-weight:700;line-height:1.35;color:var(--primary)}
h1{font-size:44px;line-height:1.25}
h2{font-size:30px;margin-bottom:12px}
h3{font-size:18px}
h4{font-size:16px}
p{margin-bottom:1em}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.section{padding:var(--space-section) 0}
.section-alt{background:var(--bg-white)}

/* 按钮体系 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:0 28px;height:48px;font-size:16px;font-weight:500;
  border-radius:var(--radius-sm);border:1px solid transparent;
  cursor:pointer;transition:all .25s ease;font-family:var(--font-cn);
  letter-spacing:.02em;white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 4px 16px rgba(201,160,99,.3)}
.btn-primary:focus{outline:2px solid rgba(201,160,99,.4);outline-offset:2px}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:rgba(30,35,43,.04);transform:translateY(-1px)}
.btn-outline:focus{outline:2px solid rgba(30,35,43,.3);outline-offset:2px}
.btn-white{background:#fff;color:var(--primary);border-color:#fff}
.btn-white:hover{background:var(--bg-warm);color:var(--accent);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 20px;font-size:14px}

/* 标签胶囊 */
.tag{
  display:inline-flex;align-items:center;
  background:var(--accent-soft);color:var(--accent-text);
  font-size:12px;font-weight:500;padding:4px 14px;
  border-radius:12px;line-height:1.4;
}
.tag-outline{
  background:transparent;border:1px solid var(--border);color:var(--text-mid);
}

/* ========== 导航 ========== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  transition:box-shadow .3s ease,border-color .3s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  box-shadow:var(--shadow-sm);
  border-bottom-color:var(--border);
}
.nav-container{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;height:72px;position:relative;
}
.nav-left{display:flex;align-items:center;gap:28px;justify-self:start}
.nav-right{display:flex;align-items:center;gap:28px;justify-self:end}
.site-logo{
  font-size:22px;font-weight:700;color:var(--primary);
  letter-spacing:.04em;justify-self:center;position:relative;z-index:2;
}
.site-logo:hover{color:var(--primary)}
.nav-link{
  font-size:15px;font-weight:500;color:var(--text-dark);
  position:relative;padding:6px 0;
}
.nav-link::after{
  content:'';position:absolute;left:0;bottom:0;width:0;height:2px;
  background:var(--accent);transition:width .2s ease;
}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-link:hover{color:var(--primary)}
.nav-link.active{color:var(--accent)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px;justify-self:start}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--primary);transition:all .3s ease;border-radius:2px}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{
  display:none;position:fixed;top:72px;left:0;right:0;bottom:0;
  background:var(--bg-warm);padding:40px 32px;flex-direction:column;gap:24px;
  z-index:999;overflow:auto;
}
.mobile-menu.open{display:flex}
.mobile-menu a{font-size:20px;font-weight:600;color:var(--primary);padding:10px 0;border-bottom:1px solid var(--border)}
.mobile-menu .btn{margin-top:16px;border-bottom:none}
.mobile-contact{display:none;font-size:14px;font-weight:500;color:var(--primary);justify-self:end;border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 16px;transition:all .2s}
.mobile-contact:hover{border-color:var(--accent);color:var(--accent)}

/* ========== Hero ========== */
.hero{
  background:var(--bg-warm);
  padding:72px 0 80px;
  position:relative;overflow:hidden;
}
.hero-inner{
  display:grid;grid-template-columns:1.1fr .9fr;
  gap:56px;align-items:center;
}
.hero-copy h1{margin-bottom:20px;color:var(--primary)}
.hero-copy .hero-sub{
  font-size:18px;color:var(--text-mid);line-height:1.7;
  max-width:560px;margin-bottom:32px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:420px;object-fit:cover;
  border-radius:var(--radius-md);box-shadow:var(--shadow-hover);
}
.hero-badges{
  display:flex;gap:12px;margin-top:20px;flex-wrap:wrap;
}
.hero-badges span{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-mid);background:#fff;
  padding:8px 16px;border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);
}
.hero-badges i{color:var(--accent)}
.hero-badges span::before{
  content:'';width:4px;height:4px;border-radius:50%;
  background:var(--accent);display:inline-block;margin-right:2px;
}

/* ========== 服务区块 ========== */
.services{padding:var(--space-section) 0;background:var(--bg-white)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:32px;margin-bottom:48px;flex-wrap:wrap;
}
.section-head .desc{
  max-width:360px;color:var(--text-mid);font-size:15px;line-height:1.7;
}
.service-card{
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:32px 28px;
  height:100%;
  transition:all .25s ease;
  box-shadow:var(--shadow-sm);
}
.service-card:hover{
  border-color:var(--accent);
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.service-icon{
  width:48px;height:48px;border-radius:var(--radius-sm);
  background:var(--accent-soft);display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;font-size:20px;color:var(--accent-text);
}
.service-card h3{margin-bottom:8px;font-size:18px}
.service-card p{color:var(--text-mid);font-size:14px;line-height:1.7;margin:0}

/* ========== 优势数据 ========== */
.stats{
  background:var(--bg-warm);
  padding:80px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.stat-number{font-size:44px;font-weight:700;color:var(--primary);line-height:1.2;font-family:var(--font-en)}
.stat-label{font-size:13px;color:var(--text-mid);margin-top:8px;letter-spacing:.04em}
.stat-unit{font-size:14px;color:var(--text-mid);font-weight:500}

/* ========== 案例区块 ========== */
.cases{padding:var(--space-section) 0;background:var(--bg-white)}
.case-main{
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;
  background:var(--bg-warm);border-radius:var(--radius-md);
  padding:32px;margin-bottom:32px;align-items:center;
}
.case-main img{height:320px;width:100%;object-fit:cover;border-radius:var(--radius-md)}
.case-main .case-tag{margin-bottom:12px}
.case-main h3{font-size:22px;margin-bottom:12px}
.case-main p{color:var(--text-mid);font-size:15px;margin-bottom:16px}
.case-sub-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;
}
.case-sub{background:var(--bg-warm);border-radius:var(--radius-md);overflow:hidden;transition:all .25s ease}
.case-sub:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.case-sub img{height:160px;width:100%;object-fit:cover;transition:transform .3s ease}
.case-sub:hover img{transform:scale(1.03)}
.case-sub .case-body{padding:24px}
.case-sub h4{font-size:16px;margin-bottom:6px}
.case-sub span{font-size:13px;color:var(--text-mid)}
.case-link{font-size:14px;color:var(--accent-text);display:inline-flex;align-items:center;gap:6px;margin-top:8px}

/* ========== 方案区块（深色） ========== */
.solution-section{
  background:var(--primary);
  padding:var(--space-section) 0;
  color:rgba(255,255,255,.85);
}
.solution-section h2{color:#fff}
.solution-section .section-head .desc{color:rgba(255,255,255,.6)}
.solution-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;
}
.solution-steps{position:relative;padding-left:8px}
.solution-step{
  display:flex;gap:20px;padding-bottom:40px;position:relative;
}
.solution-step:last-child{padding-bottom:0}
.solution-step::before{
  content:'';position:absolute;left:14px;top:32px;bottom:0;width:1px;
  background:rgba(255,255,255,.15);
}
.solution-step:last-child::before{display:none}
.step-num{
  width:28px;height:28px;border-radius:50%;
  border:1px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;flex-shrink:0;background:var(--primary);
}
.step-content h4{color:#fff;font-size:18px;margin-bottom:6px}
.step-content p{color:rgba(255,255,255,.55);font-size:14px;margin:0;line-height:1.7}
.scene-list{display:flex;flex-direction:column;gap:0}
.scene-item{
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.08);
  display:flex;gap:16px;align-items:flex-start;
}
.scene-item:last-child{border-bottom:none}
.scene-item::before{
  content:'';width:4px;height:4px;border-radius:50%;
  background:var(--accent);margin-top:10px;flex-shrink:0;
}
.scene-item h5{color:#fff;font-size:15px;margin-bottom:4px}
.scene-item p{color:rgba(255,255,255,.5);font-size:13px;margin:0;line-height:1.6}

/* ========== 最新资讯 ========== */
.news-section{padding:var(--space-section) 0;background:var(--bg-warm)}
.news-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:40px}
.news-featured{
  background:var(--bg-white);border-radius:var(--radius-md);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:all .25s ease;
}
.news-featured:hover{box-shadow:var(--shadow-hover)}
.news-featured img{height:260px;width:100%;object-fit:cover;transition:transform .3s ease}
.news-featured:hover img{transform:scale(1.02)}
.news-featured-body{padding:24px 28px}
.news-featured-body h3{font-size:20px;margin-bottom:8px}
.news-featured-body p{color:var(--text-mid);font-size:14px;margin-bottom:12px;line-height:1.7}
.news-meta{font-size:13px;color:var(--text-light)}
.news-list-col{display:flex;flex-direction:column;gap:16px}
.news-item{
  display:flex;gap:20px;align-items:center;
  background:var(--bg-white);border-radius:var(--radius-md);
  padding:16px;box-shadow:var(--shadow-sm);transition:all .25s ease;
}
.news-item:hover{box-shadow:var(--shadow-hover);transform:translateX(4px)}
.news-item img{width:80px;height:64px;object-fit:cover;border-radius:var(--radius-sm);flex-shrink:0}
.news-item-content h4{font-size:15px;line-height:1.5;margin-bottom:4px}
.news-item-content span{font-size:12px;color:var(--text-light)}
.news-empty{
  background:var(--bg-white);border-radius:var(--radius-md);
  padding:60px;text-align:center;color:var(--text-mid);
  box-shadow:var(--shadow-sm);font-size:15px;
}
.news-empty i{font-size:40px;color:var(--text-light);display:block;margin-bottom:16px}

/* ========== FAQ ========== */
.faq-section{padding:var(--space-section) 0;background:var(--bg-white)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  border:1px solid var(--border);border-radius:var(--radius-md);
  margin-bottom:12px;overflow:hidden;transition:all .25s ease;
}
.faq-item.active{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 28px;cursor:pointer;font-size:16px;font-weight:600;
  color:var(--primary);background:var(--bg-white);
}
.faq-question i{transition:transform .3s ease;color:var(--accent);font-size:18px}
.faq-item.active .faq-question i{transform:rotate(45deg)}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  padding:0 28px;color:var(--text-mid);font-size:14px;line-height:1.8;
}
.faq-item.active .faq-answer{max-height:200px;padding:0 28px 20px}

/* ========== CTA ========== */
.cta-section{
  background:var(--primary);
  padding:72px 0;position:relative;overflow:hidden;
}
.cta-section h2{color:#fff;margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,.6);font-size:15px;max-width:520px;margin-bottom:32px}
.cta-section .btn-white{margin-top:4px}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}

/* ========== 页脚 ========== */
.site-footer{background:var(--primary);color:rgba(255,255,255,.7);padding:64px 0 0;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;
  gap:48px;padding-bottom:48px;
}
.footer-brand .footer-logo{font-size:22px;font-weight:700;color:#fff;margin-bottom:12px;display:block}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.5);line-height:1.7}
.footer-col h5{color:#fff;font-size:15px;margin-bottom:20px;font-weight:600}
.footer-col a{
  display:block;color:rgba(255,255,255,.55);font-size:14px;
  padding:4px 0;transition:color .2s;
}
.footer-col a:hover{color:var(--accent)}
.footer-contact li{
  display:flex;gap:10px;align-items:center;margin-bottom:8px;
  font-size:14px;color:rgba(255,255,255,.55);
}
.footer-contact i{color:var(--accent);width:16px;text-align:center}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:24px 0;text-align:center;
  font-size:13px;color:rgba(255,255,255,.35);
}

/* ========== 响应式 ========== */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual img{height:320px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .solution-wrap{grid-template-columns:1fr;gap:48px}
  .case-main{grid-template-columns:1fr}
  .case-main img{height:260px}
  .news-grid{grid-template-columns:1fr;gap:32px}
}
@media(max-width:768px){
  :root{--space-section:64px}
  h1{font-size:32px}
  h2{font-size:26px}
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:flex}
  .mobile-contact{display:inline-flex}
  .site-logo{font-size:18px}
  .nav-container{height:64px}
  .mobile-menu{top:64px}
  .hero{padding:48px 0 56px}
  .hero-copy .hero-sub{font-size:16px}
  .hero-visual img{height:240px}
  .case-sub-grid{grid-template-columns:1fr 1fr}
  .case-sub img{height:140px}
  .stats .stat-number{font-size:32px}
  .cta-inner{flex-direction:column;text-align:center;gap:24px}
  .cta-section p{margin:0 auto 24px}
  .footer-grid{grid-template-columns:1fr}
  .faq-question{font-size:15px;padding:16px 20px}
  .faq-answer{padding:0 20px}
  .faq-item.active .faq-answer{padding:0 20px 16px}
  .btn{height:44px;padding:0 22px;font-size:15px}
}
@media(max-width:520px){
  .hero-copy h1{font-size:28px;line-height:1.3}
  .hero-copy .hero-sub{font-size:15px}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .case-sub-grid{grid-template-columns:1fr}
  .service-card{padding:24px 20px}
  .case-main{padding:20px}
  .news-item{flex-direction:column;align-items:flex-start;gap:12px}
  .news-item img{width:100%;height:160px}
  .news-featured-body{padding:20px}
  .badges{flex-wrap:wrap}
  .scenes{grid-template-columns:1fr}
  .footer-bottom{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --ink: #1E232B;
  --gold: #C9A063;
  --gold-dark: #B89357;
  --bg: #F7F5F2;
  --white: #FFFFFF;
  --text: #2A2E35;
  --text-light: #6B7280;
  --text-faint: #8B8F98;
  --border: #E8E4DE;
  --radius-card: 6px;
  --radius-btn: 4px;
  --radius-tag: 12px;
  --shadow-card: 0 2px 8px rgba(30,35,43,0.06);
  --shadow-hover: 0 8px 24px rgba(30,35,43,0.12);
  --space-lg: 96px;
  --space-md: 72px;
  --space-sm: 48px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ========== 基础重置 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== 按钮体系 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  outline: none;
}
.btn-primary {
  background: var(--gold);
  color: #fff;
  border: 1px solid var(--gold);
}
.btn-primary:hover {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
  transform: translateY(-1px);
}
.btn-primary:focus-visible {
  box-shadow: 0 0 0 2px rgba(201,160,99,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn-outline:hover {
  background: rgba(30,35,43,0.04);
  transform: translateY(-1px);
}

/* ========== 导航 ========== */
.site-header {
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border);
  height: 72px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(6px);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}
.header-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.5px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}
.header-logo:hover { color: var(--gold); }
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  font-size: 15px;
  color: var(--text);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.nav-link:hover,
.nav-link.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}
.btn-nav {
  padding: 8px 20px;
  font-size: 14px;
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--ink);
  line-height: 1;
  padding: 4px;
}
.nav-toggle:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ========== 面包屑 ========== */
.breadcrumb-wrap {
  padding: 32px 0 0;
  font-size: 13px;
  color: var(--text-faint);
}
.breadcrumb-wrap a {
  color: var(--text-faint);
  transition: color 0.2s ease;
}
.breadcrumb-wrap a:hover { color: var(--gold); }
.breadcrumb-wrap .current { color: var(--ink); font-weight: 500; }
.breadcrumb-wrap .sep { margin: 0 8px; color: #C0C4CC; }

/* ========== 文章主体 ========== */
.article-section { padding: 24px 0 var(--space-md); }
.article-card {
  background: var(--white);
  border-radius: var(--radius-card);
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 56px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(232,228,222,0.5);
}
.article-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 24px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item i { color: var(--gold); }
.meta-dot {
  width: 4px;
  height: 4px;
  background: #C0C4CC;
  border-radius: 50%;
}
.article-cover {
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 32px;
  border: 1px solid var(--border);
}
.article-cover img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-cover img:hover { transform: scale(1.02); }
.article-lead {
  border-left: 4px solid var(--gold);
  padding: 10px 20px;
  background: rgba(201,160,99,0.05);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 32px;
  border-radius: 0 4px 4px 0;
}
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.article-content p {
  margin-bottom: 1.2em;
  max-width: 68ch;
}
.article-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 1.5em 0 0.8em;
  color: var(--ink);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 1.3em 0 0.6em;
  color: var(--ink);
  line-height: 1.4;
}
.article-content img {
  border-radius: var(--radius-card);
  margin: 24px 0;
  max-width: 100%;
  height: auto;
}
.article-content a {
  color: var(--gold-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--gold); }
.article-content blockquote {
  border-left: 3px solid var(--gold);
  background: var(--bg);
  padding: 16px 24px;
  margin: 24px 0;
  color: #5A5F66;
  border-radius: 0 6px 6px 0;
}
.article-content ul,
.article-content ol {
  margin: 0 0 1.2em 1.5em;
}
.article-content ul li,
.article-content ol li {
  margin-bottom: 0.4em;
}
.article-content ul li::marker { color: var(--gold); }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content th {
  background: var(--bg);
  font-weight: 600;
  color: var(--ink);
}
.article-content code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.9em;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  background: rgba(201,160,99,0.12);
  color: #8A6E3E;
  font-size: 12px;
  transition: background 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
}
.tag:hover { background: rgba(201,160,99,0.2); border-color: var(--gold); }

/* ========== 上一篇/下一篇 ========== */
.prev-next {
  max-width: 880px;
  margin: 24px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.prev-card,
.next-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  display: block;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.prev-card:hover,
.next-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-color: rgba(201,160,99,0.5);
}
.pn-label {
  display: block;
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.pn-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
}
.next-card .pn-title { justify-content: flex-end; }
.next-card:hover .pn-arrow { transform: translateX(4px); }
.prev-card:hover .pn-arrow { transform: translateX(-4px); }
.pn-arrow { transition: transform 0.25s ease; }

/* ========== 相关推荐 ========== */
.related-section { padding: 0 0 var(--space-lg); }
.related-header {
  text-align: center;
  margin-bottom: 40px;
}
.related-header h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.related-header p {
  color: var(--text-faint);
  margin-top: 8px;
  font-size: 14px;
}
.related-empty {
  text-align: center;
  padding: 48px 24px;
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  max-width: 880px;
  margin: 0 auto;
}
.related-empty .icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: var(--bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #A0A6AD;
  font-size: 18px;
}
.related-empty p {
  font-size: 15px;
  color: var(--text-faint);
}

/* ========== CTA ========== */
.cta-section {
  background: var(--ink);
  padding: var(--space-md) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.cta-section h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.cta-section p {
  color: rgba(255,255,255,0.7);
  margin-top: 12px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  font-size: 15px;
}
.cta-section .btn {
  margin-top: 32px;
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--white);
}
.cta-section .btn:hover {
  background: rgba(255,255,255,0.9);
  border-color: rgba(255,255,255,0.9);
  transform: translateY(-1px);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.8);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.footer-logo:hover { color: var(--gold); }
.footer-brand p {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
}
.footer-col h5 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--gold); }
.footer-contact li {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i {
  color: var(--gold);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ========== 无文章空态 ========== */
.article-not-found {
  text-align: center;
  padding: 24px 0;
}
.article-not-found p {
  font-size: 18px;
  color: var(--text-faint);
  margin-bottom: 16px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .nav-left, .nav-right { gap: 20px; }
  .article-card { padding: 40px 32px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-left, .nav-right {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  body.menu-open .nav-left,
  body.menu-open .nav-right {
    display: flex;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 24px 20px;
    box-shadow: 0 12px 24px rgba(30,35,43,0.08);
    border-bottom: 1px solid var(--border);
    z-index: 99;
  }
  body.menu-open .nav-left { padding-bottom: 8px; }
  body.menu-open .nav-right { top: auto; }
  body.menu-open .nav-link {
    width: 100%;
    text-align: center;
    padding: 14px 0;
    font-size: 17px;
    border-bottom: 1px solid var(--border);
  }
  body.menu-open .btn-nav {
    margin-top: 12px;
    width: 100%;
  }
  .header-logo {
    position: static;
    transform: none;
    margin-right: auto;
    margin-left: 8px;
  }
  .nav-toggle { order: -1; }
  .header-inner { flex-wrap: wrap; }
  .breadcrumb-wrap a, .breadcrumb-wrap .sep { margin: 0 4px; }
  .article-card { padding: 28px 20px; }
  .article-title { font-size: 26px; }
  .prev-next { grid-template-columns: 1fr; gap: 16px; }
  .next-card .pn-title { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .article-title { font-size: 24px; }
  .article-meta { flex-wrap: wrap; gap: 8px; }
  .btn { width: 100%; }
  .cta-section h2 { font-size: 26px; }
  .related-header h2 { font-size: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  html { scroll-behavior: auto; }
}

/* roulang page: category1 */
/* ============================================================
   kiayun官网 方案中心 样式变量说明
   --primary: 墨岩黑，用于正文、头部、页脚及主文字
   --accent: 暖金，用于关键CTA、选中态与强调线
   --bg-warm: 暖灰白，用于页面全局底色与浅色板块
   --text-light: 次级灰，用于摘要、辅助说明
   --border: 浅棕灰边框，用于分隔线、卡片描边
   --radius: 统一定义圆角（卡片6px，按钮4px，标签12px）
   --shadow: 默认卡片阴影，--shadow-hover 为悬浮增强
   ============================================================ */
:root {
  --primary: #1E232B;
  --accent: #C9A063;
  --accent-hover: #B89357;
  --bg-warm: #F7F5F2;
  --bg-white: #FFFFFF;
  --text: #2A2E35;
  --text-light: #6B7280;
  --border: #E8E4DE;
  --radius: 6px;
  --btn-radius: 4px;
  --badge-radius: 12px;
  --shadow: 0 2px 8px rgba(30,35,43,0.06);
  --shadow-hover: 0 8px 24px rgba(30,35,43,0.12);
  --space-section: 96px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: Inter, Arial, sans-serif;
}
/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg-warm);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }
ul { list-style: none; }
button, input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--btn-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(201,160,99,0.4);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(201,160,99,0.28);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: rgba(30,35,43,0.04);
  color: var(--primary);
  transform: translateY(-1px);
}
.btn-sm { padding: 9px 20px; font-size: 13px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
/* ============ Badge / Tag ============ */
.badge {
  display: inline-block;
  background: rgba(201,160,99,0.12);
  color: #8A6E3E;
  font-size: 12px;
  padding: 4px 14px;
  border-radius: var(--badge-radius);
  line-height: 1.6;
  transition: background 0.2s ease;
}
.badge:hover { background: rgba(201,160,99,0.2); }
/* ============ Header / Nav ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: var(--bg-warm);
  z-index: 999;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  background: rgba(255,255,255,0.96);
  box-shadow: 0 1px 0 var(--border), 0 4px 20px rgba(30,35,43,0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
  position: relative;
}
.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-left { margin-right: auto; padding-left: 8px; }
.nav-right { margin-left: auto; padding-right: 8px; }
.site-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
  line-height: 1.2;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}
.site-logo:hover { color: var(--primary); }
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 6px 2px;
  line-height: 1.4;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.nav-link:hover { color: var(--accent); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-cta { margin-left: 8px; }
.header-actions { display: none; }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 6px;
  position: relative;
  z-index: 1001;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--primary);
  margin: 4px 0;
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  padding: 24px 24px 32px;
  box-shadow: 0 8px 30px rgba(30,35,43,0.1);
  flex-direction: column;
  gap: 18px;
  z-index: 998;
  border-top: 1px solid var(--border);
}
.mobile-menu a {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .mobile-cta {
  margin-top: 10px;
  justify-content: center;
  border-bottom: none;
}
.site-header.menu-open .mobile-menu { display: flex; }
.site-header.menu-open .menu-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header.menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
.site-header.menu-open .menu-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
/* ============ Breadcrumb ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: #B8B2AA; }
.breadcrumb .current { color: var(--primary); font-weight: 500; }
/* ============ Page Hero ============ */
.page-hero {
  background:
    linear-gradient(rgba(247,245,242,0.92), rgba(247,245,242,0.94)),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  padding: 140px 0 60px;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}
.page-hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary);
  margin-bottom: 10px;
}
.page-hero p {
  font-size: 15px;
  color: var(--text-light);
  max-width: 560px;
  line-height: 1.7;
}
.hero-aside {
  flex-shrink: 0;
  width: 280px;
  height: 160px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #EDEAE6;
}
.hero-aside img { width: 100%; height: 100%; object-fit: cover; }
/* ============ Solution List Section ============ */
.solutions-section {
  padding: var(--space-section) 0;
}
.section-head {
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 8px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-light);
  max-width: 640px;
}
.solution-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.solution-card {
  display: flex;
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.solution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.solution-card-img {
  flex: 0 0 260px;
  min-height: 160px;
  background: #EDEAE6;
  overflow: hidden;
}
.solution-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.solution-card:hover .solution-card-img img { transform: scale(1.03); }
.solution-card-body {
  flex: 1;
  padding: 26px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}
.solution-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.4;
}
.solution-card-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.solution-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 6px;
}
.solution-card-meta .meta-time {
  font-size: 13px;
  color: var(--text-light);
}
.card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.card-link i { font-size: 12px; transition: transform 0.2s ease; }
.card-link:hover { color: var(--accent); }
.card-link:hover i { transform: translateX(4px); }
/* ============ Explain Section ============ */
.explain-section {
  padding: var(--space-section) 0;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
}
.explain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.explain-text h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 20px;
}
.explain-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 16px;
}
.explain-text p:last-child { margin-bottom: 0; }
.explain-points {
  background: var(--bg-warm);
  border-radius: var(--radius);
  padding: 32px;
  border-left: 3px solid var(--accent);
}
.explain-points h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
}
.explain-points ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.explain-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
}
.explain-points li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
  flex-shrink: 0;
}
/* ============ FAQ Section ============ */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-warm);
}
.faq-section .section-head { text-align: center; }
.faq-section .section-head p { margin: 0 auto; }
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 26px 30px;
  box-shadow: var(--shadow);
}
.faq-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}
.faq-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-light);
}
/* ============ CTA Section ============ */
.cta-section {
  padding: var(--space-section) 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.08);
}
.cta-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 500px;
  margin: 0 auto 32px;
}
.cta-inner .btn-white {
  background: #fff;
  color: var(--primary);
}
.cta-inner .btn-white:hover {
  background: rgba(255,255,255,0.88);
  color: var(--primary);
  transform: translateY(-1px);
}
/* ============ Footer ============ */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: inline-block;
  margin-bottom: 14px;
}
.footer-logo:hover { color: #fff; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  max-width: 320px;
}
.footer-col h5 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 4px 0;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--accent); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}
.footer-contact i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
/* ============ Responsive ============ */
@media (max-width: 1024px) {
  :root { --space-section: 72px; }
  .page-hero h1 { font-size: 34px; }
  .hero-aside { width: 240px; height: 140px; }
  .solution-card-img { flex-basis: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  :root { --space-section: 60px; }
  .site-header { height: 64px; }
  .header-inner { height: 64px; }
  .menu-toggle { display: block; position: absolute; left: 16px; top: 50%; transform: translateY(-50%); }
  .header-actions { display: block; position: absolute; right: 16px; top: 50%; transform: translateY(-50%); }
  .header-actions .header-contact-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    padding: 6px 4px;
  }
  .header-actions .header-contact-link:hover { color: var(--accent); }
  .nav-left, .nav-right { display: none; }
  .site-logo { position: static; transform: none; font-size: 20px; }
  .mobile-menu { top: 64px; }
  .page-hero { padding: 110px 0 44px; }
  .page-hero-inner { flex-direction: column; align-items: flex-start; }
  .page-hero h1 { font-size: 30px; }
  .hero-aside { width: 100%; height: 160px; }
  .section-head h2 { font-size: 26px; }
  .solution-card { flex-direction: column; }
  .solution-card-img { flex-basis: auto; height: 180px; }
  .solution-card-body { padding: 22px 22px 26px; }
  .explain-grid { grid-template-columns: 1fr; gap: 32px; }
  .faq-item { padding: 20px 22px; }
  .cta-inner h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  :root { --space-section: 48px; }
  .page-hero h1 { font-size: 26px; }
  .page-hero p { font-size: 14px; }
  .section-head h2 { font-size: 23px; }
  .solution-card-img { height: 160px; }
  .solution-card-body h3 { font-size: 18px; }
  .solution-card-meta { flex-wrap: wrap; gap: 8px; }
  .explain-points { padding: 24px 20px; }
  .faq-item h3 { font-size: 15px; }
  .cta-inner h2 { font-size: 22px; }
}

/* roulang page: category2 */
/* ============================================================
   kiayun官网 设计变量说明
   主色 墨岩黑 #1E232B | 辅色 暖金 #C9A063
   背景 暖灰白 #F7F5F2 | 正文 深灰 #2A2E35
   圆角 卡片6px 按钮4px 标签12px | 阴影 柔和两层
   ============================================================ */
:root {
  --primary: #1E232B;
  --accent: #C9A063;
  --accent-dark: #B89357;
  --bg: #F7F5F2;
  --white: #FFFFFF;
  --text: #2A2E35;
  --text-light: #6B7280;
  --border: #E8E4DE;
  --radius: 6px;
  --radius-pill: 12px;
  --shadow-sm: 0 2px 8px rgba(30,35,43,0.06);
  --shadow-lg: 0 8px 24px rgba(30,35,43,0.12);
  --section-space: 96px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 600; color: var(--primary); }
button { font-family: inherit; }

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-primary:focus-visible { outline: 2px solid rgba(201,160,99,0.4); outline-offset: 2px; }
.btn-outline { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(30,35,43,0.04); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--bg); transform: translateY(-1px); }

/* ---------- 标签 / 胶囊 ---------- */
.tag {
  display: inline-block;
  background: rgba(201,160,99,0.12);
  color: #8A6E3E;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  line-height: 1.4;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 2px 12px rgba(30,35,43,0.06); border-color: var(--border); }
.header-inner { position: relative; display: flex; align-items: center; justify-content: center; height: 72px; }
.logo { font-size: 22px; font-weight: 700; color: var(--primary); letter-spacing: 0.5px; line-height: 1.2; }
.nav-left, .nav-right { position: absolute; top: 0; display: flex; align-items: center; height: 72px; gap: 4px; }
.nav-left { left: 0; }
.nav-right { right: 0; }
.nav-link {
  position: relative;
  padding: 8px 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 4px;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.nav-link:hover { color: var(--accent); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.btn-nav { margin-left: 4px; }

/* 移动端导航工具 */
.nav-mobile-tools { display: none; }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--primary);
  cursor: pointer;
  padding: 8px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}
.menu-toggle:focus-visible { outline: 2px solid rgba(201,160,99,0.4); }
.btn-nav-mobile { padding: 8px 16px; font-size: 14px; }

.mobile-drawer {
  position: fixed;
  top: 72px; left: 0; right: 0; bottom: 0;
  background: var(--white);
  z-index: 99;
  padding: 24px;
  display: none;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}
.mobile-drawer a {
  font-size: 18px;
  padding: 14px 8px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
}
.mobile-drawer .mobile-cta {
  margin-top: 16px;
  border-bottom: none;
  background: var(--accent);
  color: #fff;
  text-align: center;
  font-size: 15px;
  border-radius: 4px;
}
.mobile-drawer .mobile-cta:hover { background: var(--accent-dark); }
.mobile-link.active { color: var(--accent); font-weight: 600; }
body.drawer-open { overflow: hidden; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 24px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .current { color: var(--primary); font-weight: 500; }

/* ---------- 分类页 Hero ---------- */
.category-hero {
  background: var(--bg);
  padding: 64px 0 72px;
  border-bottom: 1px solid var(--border);
}
.category-hero .grid-x { align-items: center; }
.category-hero h1 { font-size: 40px; font-weight: 700; margin-bottom: 16px; line-height: 1.25; }
.category-hero .lead { font-size: 17px; color: var(--text-light); max-width: 560px; line-height: 1.8; }
.hero-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); background: #EDEAE6; }
.hero-img img { width: 100%; height: 220px; object-fit: cover; }

/* ---------- 数据条 ---------- */
.stats-bar { background: var(--white); padding: 48px 0; border-bottom: 1px solid var(--border); }
.stat-item { text-align: center; padding: 16px 0; }
.stat-num { font-size: 42px; font-weight: 700; color: var(--primary); line-height: 1.1; }
.stat-num span { font-size: 18px; font-weight: 600; color: var(--accent); margin-left: 2px; }
.stat-label { font-size: 13px; color: var(--text-light); margin-top: 8px; }

/* ---------- 双栏瀑布案例 ---------- */
.case-section { padding: var(--section-space) 0; }
.section-head { margin-bottom: 48px; }
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  padding-left: 16px;
}
.section-head h2::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head p { font-size: 15px; color: var(--text-light); max-width: 640px; }
.case-col-offset { margin-top: 56px; }

.case-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  margin-bottom: 32px;
}
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.case-card .card-media {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #EDEAE6;
  display: flex;
  align-items: center;
  justify-content: center;
}
.case-card .card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.case-card:hover .card-media img { transform: scale(1.03); }
.case-card .card-body { padding: 24px 28px; }
.case-card .card-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.case-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.case-card .card-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.case-card .card-footer {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-light);
}
.case-card .card-footer i { color: var(--accent); font-size: 12px; }

.load-more-wrap { text-align: center; margin-top: 24px; }

/* ---------- 分类词解释 ---------- */
.about-category { background: var(--white); padding: var(--section-space) 0; border-top: 1px solid var(--border); }
.about-category h2 { font-size: 28px; font-weight: 700; margin-bottom: 20px; position: relative; padding-left: 16px; }
.about-category h2::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
}
.about-category .about-lead { font-size: 16px; line-height: 1.8; color: var(--text); margin-bottom: 16px; }
.about-category p { font-size: 15px; line-height: 1.8; color: var(--text-light); margin-bottom: 16px; }
.point-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px;
  border-left: 4px solid var(--accent);
  margin-top: 8px;
}
.point-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.point-list li { font-size: 15px; color: var(--text); padding: 10px 0 10px 28px; position: relative; line-height: 1.6; }
.point-list li i { position: absolute; left: 0; top: 14px; width: 18px; height: 18px; color: var(--accent); font-size: 13px; }

/* ---------- FAQ ---------- */
.faq-section { padding: var(--section-space) 0; }
.faq-section h2 { font-size: 32px; font-weight: 700; text-align: center; margin-bottom: 48px; }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px 32px;
  margin-bottom: 16px;
  border: 1px solid transparent;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.faq-item:hover { box-shadow: var(--shadow-lg); border-color: rgba(201,160,99,0.3); }
.faq-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: var(--primary); }
.faq-item p { font-size: 14px; color: var(--text-light); line-height: 1.8; }

/* ---------- CTA ---------- */
.cta-section {
  background: linear-gradient(rgba(30,35,43,0.92), rgba(30,35,43,0.92)), url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  padding: 80px 0;
  text-align: center;
}
.cta-section h2 { color: #fff; font-size: 30px; margin-bottom: 16px; font-weight: 600; }
.cta-section p { color: rgba(255,255,255,0.75); font-size: 15px; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--primary); color: rgba(255,255,255,0.7); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-logo { font-size: 22px; font-weight: 700; color: #fff; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; max-width: 280px; }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 20px; font-weight: 600; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.65); padding: 6px 0; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--accent); }
.footer-contact li { font-size: 14px; padding: 6px 0; color: rgba(255,255,255,0.65); display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: var(--accent); width: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --section-space: 64px; }
  .nav-left, .nav-right.desktop-nav { display: none; }
  .nav-mobile-tools { display: flex; align-items: center; gap: 8px; }
  .menu-toggle { display: inline-flex; }
  .header-inner { justify-content: space-between; }
  .logo { position: static; transform: none; margin-right: auto; }
  .category-hero { padding: 48px 0 56px; }
  .category-hero h1 { font-size: 30px; }
  .category-hero .lead { font-size: 15px; }
  .hero-img { margin-top: 24px; }
  .section-head h2 { font-size: 26px; }
  .cta-section h2 { font-size: 24px; }
}

@media (max-width: 639px) {
  .case-col-offset { margin-top: 0; }
  .stats-bar .cell { margin-bottom: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-card .card-body { padding: 20px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand p { max-width: 100%; }
  .faq-item { padding: 20px; }
  .point-card { padding: 24px; }
  .stat-num { font-size: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}