/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --bg:#F7F6F2;
  --bg-elevated:#FFFFFF;
  --bg-dark:#16151D;
  --bg-dark-soft:#1E1D26;
  --text-primary:#17161A;
  --text-body:#2E2D33;
  --text-secondary:#6F6E76;
  --text-tertiary:#9B9A9F;
  --accent:#F04E23;
  --accent-hover:#D9411A;
  --accent-soft:#FDEAE3;
  --border:#E8E6E1;
  --border-dark:#33323A;
  --success:#1E9A6A;
  --warning:#D9A13B;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-sm:0 2px 8px rgba(0,0,0,0.05);
  --shadow-md:0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg:0 20px 60px rgba(0,0,0,0.12);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:Inter,"DIN Alternate","Helvetica Neue",sans-serif;
  --header-h:70px;
  --container:1200px;
}

/* ========== 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-sans);
  background:var(--bg);
  color:var(--text-body);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ========== 容器 ========== */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
@media (max-width:768px){.container{padding:0 16px}}

/* ========== 按钮 ========== */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#fff;border:1px solid var(--accent);
  border-radius:var(--radius-md);padding:14px 28px;font-size:15px;font-weight:600;
  min-height:44px;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer;text-decoration:none;
}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 24px rgba(240,78,35,.28)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--text-primary);border:1.5px solid var(--text-primary);
  border-radius:var(--radius-md);padding:14px 28px;font-size:15px;font-weight:600;
  min-height:44px;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer;text-decoration:none;
}
.btn-ghost:hover{background:var(--bg-dark);color:#fff;border-color:var(--bg-dark)}
.btn-ghost:active{transform:scale(.98)}
.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6);
  border-radius:var(--radius-md);padding:14px 28px;font-size:15px;font-weight:600;
  min-height:44px;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer;text-decoration:none;
}
.btn-ghost-light:hover{background:#fff;color:var(--bg-dark);border-color:#fff}
.btn-ghost-light:active{transform:scale(.98)}

/* ========== 区块头部 ========== */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px;flex-wrap:wrap}
.section-head h2{font-size:36px;font-weight:700;color:var(--text-primary);letter-spacing:-.01em;line-height:1.25}
.section-desc{font-size:17px;color:var(--text-secondary);max-width:60ch;line-height:1.7}
@media (max-width:768px){
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px}
  .section-head h2{font-size:28px}
  .section-desc{font-size:15px}
}

/* ========== 导航 ========== */
.site-header{
  position:sticky;top:0;z-index:1000;height:var(--header-h);
  background:rgba(247,246,242,.92);backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.header-nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{
  width:28px;height:28px;border-radius:8px;background:var(--accent);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.brand-icon::after{
  content:'';display:block;width:0;height:0;
  border-left:8px solid #fff;border-top:5px solid transparent;border-bottom:5px solid transparent;
  margin-left:2px;
}
.brand-text{font-size:19px;font-weight:700;color:var(--text-primary);letter-spacing:.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
.nav-links li a{
  display:inline-flex;align-items:center;padding:10px 16px;font-size:15px;font-weight:500;
  color:var(--text-body);border-radius:var(--radius-sm);position:relative;transition:color .2s;
  min-height:44px;
}
.nav-links li a::after{
  content:'';position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:var(--accent);
  border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-links li a:hover{color:var(--text-primary)}
.nav-links li a:hover::after{transform:scaleX(1)}
.nav-links li a.active{color:var(--text-primary);font-weight:600}
.nav-links li a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:16px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-md);padding:0 12px;height:40px;width:180px;transition:all .2s;
}
.search-box:hover,.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.search-box svg{width:18px;height:18px;stroke:var(--text-tertiary);flex-shrink:0}
.search-box input{
  border:none;outline:none;background:transparent;font-size:14px;color:var(--text-primary);
  width:100%;padding:0 0 0 8px;height:38px;
}
.search-box input::placeholder{color:var(--text-tertiary)}
.header-login{
  font-size:15px;font-weight:500;color:var(--text-body);min-height:44px;
  display:inline-flex;align-items:center;padding:0 4px;transition:color .2s;
}
.header-login:hover{color:var(--accent)}
.header-cta{min-height:44px;padding:0 24px;font-size:14px;white-space:nowrap}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-md);border:1px solid var(--border);background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:all .2s}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .25s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:1024px){
  .search-box{display:none}
}
@media (max-width:900px){
  .nav-links{
    position:fixed;top:var(--header-h);left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:12px 16px 20px;gap:4px;transform:translateY(-120%);
    opacity:0;pointer-events:none;transition:all .3s cubic-bezier(.4,0,.2,1);
    border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-links li a{padding:14px 16px;font-size:16px;justify-content:space-between}
  .nav-links li a::after{display:none}
  .nav-links li a.active{background:var(--accent-soft);border-radius:var(--radius-md)}
  .nav-toggle{display:flex}
  .header-login{display:none}
  .header-cta{font-size:13px;padding:0 18px}
}

/* ========== Hero ========== */
.hero{
  position:relative;background:var(--bg-dark);color:#fff;overflow:hidden;
  padding:72px 0 96px;min-height:640px;display:flex;align-items:center;
}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;opacity:.38;z-index:0;
  animation:heroFloat 8s ease-in-out infinite;
}
@keyframes heroFloat{0%,100%{transform:scale(1.05)}50%{transform:scale(1.1)}}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(22,21,29,.95) 0%,rgba(22,21,29,.7) 55%,rgba(22,21,29,.4) 100%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.35);
  border-radius:32px;padding:6px 16px;font-size:13px;letter-spacing:.05em;color:rgba(255,255,255,.85);
  margin-bottom:24px;background:rgba(255,255,255,.06);
}
.hero-badge::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--success)}
.hero h1{font-size:54px;font-weight:800;letter-spacing:-.02em;line-height:1.18;margin-bottom:20px;color:#fff}
.hero-sub{font-size:18px;color:rgba(255,255,255,.72);max-width:520px;line-height:1.7;margin-bottom:32px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.hero-points{display:flex;gap:24px;flex-wrap:wrap;padding:0}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.75)}
.hero-points li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--success)}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:420px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.online-card{
  position:absolute;bottom:-20px;left:24px;background:#fff;border-radius:var(--radius-md);
  padding:14px 20px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;
  color:var(--text-primary);
}
.online-dot{width:10px;height:10px;border-radius:50%;background:var(--success);position:relative;flex-shrink:0}
.online-dot::after{content:'';position:absolute;inset:-4px;border-radius:50%;background:var(--success);opacity:.3;animation:pulse 2s infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.5}100%{transform:scale(1.6);opacity:0}}
.online-card strong{display:block;font-size:15px;font-weight:600}
.online-card span{font-size:13px;color:var(--text-secondary)}

@media (max-width:1024px){
  .hero{padding:64px 0 80px}
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero h1{font-size:40px}
  .hero-sub{font-size:16px}
  .hero-visual{max-width:560px}
  .hero-visual img{height:340px}
}
@media (max-width:768px){
  .hero{padding:48px 0 72px;min-height:auto}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15px}
  .hero-points{gap:12px}
  .hero-points li{font-size:13px}
  .online-card{bottom:-14px;left:12px;padding:10px 14px}
  .online-card strong{font-size:13px}
  .online-card span{font-size:12px}
}

/* ========== 信任数据条 ========== */
.trust-bar{background:var(--bg-dark);border-top:1px solid var(--border-dark);padding:40px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.trust-item{text-align:center;padding:8px 0}
.trust-item strong{
  display:block;font-family:var(--font-num);font-size:42px;font-weight:800;
  color:#fff;letter-spacing:-.02em;line-height:1.2;
}
.trust-item span{font-size:14px;color:rgba(255,255,255,.55)}
@media (max-width:768px){
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .trust-item strong{font-size:32px}
}

/* ========== 步骤区 ========== */
.steps{padding:96px 0}
@media (max-width:768px){.steps{padding:56px 0}}
.steps-grid{display:grid;grid-template-columns:1fr 24px 1fr 24px 1fr;gap:0;align-items:stretch}
.step-card{
  background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:32px 28px;box-shadow:var(--shadow-sm);transition:all .25s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;
}
.step-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:#d8d5cf}
.step-num{
  font-family:var(--font-num);font-size:56px;font-weight:800;color:var(--accent);
  background:var(--accent-soft);display:inline-block;width:84px;height:84px;border-radius:20px;
  display:flex;align-items:center;justify-content:center;margin-bottom:24px;line-height:1;letter-spacing:-.02em;
}
.step-card h3{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:12px}
.step-card p{font-size:15px;color:var(--text-secondary);line-height:1.7;flex:1}
.step-link{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:14px;font-weight:500;color:var(--text-secondary);transition:all .2s}
.step-link:hover{color:var(--accent)}
.step-link:hover::after{transform:translateX(4px)}
.step-link::after{content:'→';transition:transform .2s}
.step-line{display:flex;align-items:center;justify-content:center}
.step-line::before{content:'';display:block;width:0;height:0;border-top:2px dashed var(--border)}
@media (max-width:1024px){
  .steps-grid{grid-template-columns:1fr;gap:16px}
  .step-line{display:none}
}

/* ========== 案例区 ========== */
.cases{padding:96px 0;background:var(--bg-elevated)}
@media (max-width:768px){.cases{padding:56px 0}}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:all .25s cubic-bezier(.4,0,.2,1);text-decoration:none;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d8d5cf}
.case-img{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-dark)}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.case-card:hover .case-img img{transform:scale(1.04)}
.case-img::after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.35) 0%,transparent 55%)}
.case-tag{
  position:absolute;left:14px;bottom:14px;z-index:2;display:inline-flex;
  background:rgba(255,255,255,.88);color:var(--text-primary);font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:24px;
}
.case-body{padding:24px 20px 20px;display:flex;flex-direction:column;flex:1}
.case-body h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px}
.case-body p{font-size:14px;color:var(--text-secondary);line-height:1.6;margin-bottom:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.case-stats{display:flex;border-top:1px solid var(--border);padding-top:16px;gap:8px}
.case-stats div{flex:1;text-align:left}
.case-stats strong{display:block;font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--text-primary);line-height:1.2}
.case-stats span{font-size:12px;color:var(--text-tertiary)}
@media (max-width:1024px){.cases-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:768px){.cases-grid{grid-template-columns:1fr}}

/* ========== FAQ ========== */
.faq{padding:96px 0}
@media (max-width:768px){.faq{padding:56px 0}}
.faq-list{max-width:860px;margin:0 auto;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item{border-bottom:1px solid var(--border);transition:background .2s}
.faq-item:last-child{border-bottom:none}
.faq-item:hover{background:rgba(253,234,227,.25)}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:20px 28px;text-align:left;font-size:16px;font-weight:600;color:var(--text-primary);
  min-height:56px;transition:color .2s;
}
.faq-question:hover{color:var(--accent)}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0;margin-left:16px}
.faq-icon::before,.faq-icon::after{
  content:'';position:absolute;background:var(--text-secondary);border-radius:2px;
  transition:all .25s ease;top:50%;left:50%;transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.active .faq-icon::before{transform:translate(-50%,-50%) rotate(180deg)}
.faq-item.active .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-item.active .faq-icon::before{background:var(--accent)}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height .3s ease,opacity .3s ease;opacity:0;
}
.faq-item.active .faq-answer{max-height:300px;opacity:1}
.faq-answer p{
  padding:0 28px 24px;font-size:15px;color:var(--text-secondary);line-height:1.75;
}
.faq-more{text-align:center;margin-top:32px}
.faq-more a{font-size:15px;font-weight:500;color:var(--accent);text-underline-offset:4px;text-decoration:underline;transition:opacity .2s}
.faq-more a:hover{opacity:.8}
@media (max-width:768px){
  .faq-question{padding:16px 20px;font-size:15px}
  .faq-answer p{padding:0 20px 20px;font-size:14px}
}

/* ========== 资讯列表 ========== */
.news{padding:96px 0;background:var(--bg-elevated)}
@media (max-width:768px){.news{padding:56px 0}}
.news-list{display:flex;flex-direction:column}
.news-item{
  display:flex;align-items:center;gap:20px;padding:18px 8px;
  border-bottom:1px solid var(--border);transition:background .2s,position .2s;position:relative;
  text-decoration:none;min-height:64px;
}
.news-item:hover{background:rgba(253,234,227,.15)}
.news-item::before{
  content:'';position:absolute;left:0;top:10%;bottom:10%;width:2px;background:var(--accent);
  border-radius:2px;opacity:0;transition:all .2s;
}
.news-item:hover::before{opacity:1}
.news-badge{
  display:inline-block;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:600;
  padding:3px 12px;border-radius:var(--radius-sm);white-space:nowrap;flex-shrink:0;
}
.news-body{flex:1;min-width:0}
.news-title{display:block;font-size:16px;font-weight:500;color:var(--text-primary);line-height:1.5;transition:color .2s;margin-bottom:2px}
.news-item:hover .news-title{color:var(--accent)}
.news-excerpt{
  display:block;font-size:13px;color:var(--text-tertiary);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-date{
  font-family:var(--font-num);font-size:13px;color:var(--text-tertiary);white-space:nowrap;flex-shrink:0;
}
.news-empty{
  border:1.5px dashed var(--border);border-radius:var(--radius-md);padding:48px 24px;text-align:center;color:var(--text-tertiary);
  display:flex;flex-direction:column;align-items:center;gap:12px;
}
.news-empty-icon{width:40px;height:40px;opacity:.4}
.news-empty-icon::before{content:'';display:block;width:40px;height:40px;border:2px solid var(--text-tertiary);border-radius:50%}
.news-empty-icon::after{content:'';display:block;width:8px;height:8px;border-left:2px solid var(--text-tertiary);border-bottom:2px solid var(--text-tertiary);transform:rotate(-45deg);margin:-26px auto 0}
.news-empty p{font-size:15px}
.news-more{text-align:center;margin-top:32px}
.news-more a{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--text-primary);
  min-height:44px;padding:0 20px;border:1.5px solid var(--border);border-radius:var(--radius-md);transition:all .2s;
}
.news-more a:hover{border-color:var(--accent);color:var(--accent)}
.news-more a:hover::after{transform:translateX(4px)}
.news-more a::after{content:'→';transition:transform .2s}
@media (max-width:768px){
  .news-item{gap:12px;flex-wrap:wrap}
  .news-badge{font-size:11px;padding:2px 10px}
  .news-title{font-size:15px}
  .news-excerpt{display:none}
  .news-date{font-size:12px}
}

/* ========== CTA ========== */
.cta{background:var(--bg-dark);padding:96px 0;position:relative;overflow:hidden}
.cta::before{
  content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;opacity:.18;
}
.cta::after{
  content:'';position:absolute;inset:0;background:radial-gradient(ellipse at center,transparent 0%,rgba(22,21,29,.75) 100%);
}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:680px;margin:0 auto}
.cta-official{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--success);
  margin-bottom:16px;font-weight:500;
}
.cta-official::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0}
.cta h2{font-size:40px;font-weight:700;color:#fff;letter-spacing:-.01em;line-height:1.25;margin-bottom:16px}
.cta p{font-size:16px;color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:32px}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
@media (max-width:768px){
  .cta{padding:56px 0}
  .cta h2{font-size:28px}
  .cta p{font-size:15px}
}

/* ========== 页脚 ========== */
.site-footer{background:var(--bg-dark);color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;margin-bottom:48px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.5);line-height:1.7;margin-top:16px;max-width:280px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  width:40px;height:40px;border:1px solid var(--border-dark);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.6);font-size:16px;transition:all .2s;
}
.footer-social a:hover{border-color:var(--accent);color:var(--accent)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{
  font-size:14px;color:rgba(255,255,255,.6);transition:color .2s,transform .2s;display:inline-flex;align-items:center;position:relative;min-height:32px;
}
.footer-col ul a::before{
  content:'';width:0;height:2px;background:var(--accent);transition:width .2s;margin-right:0;
}
.footer-col ul a:hover{color:#fff}
.footer-col ul a:hover::before{width:14px;margin-right:8px}
.footer-contact{font-size:14px;color:rgba(255,255,255,.6);line-height:2}
.footer-contact strong{color:rgba(255,255,255,.85);font-weight:600}
.footer-bottom{
  border-top:1px solid var(--border-dark);padding:24px 0;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom span{font-size:13px;color:rgba(255,255,255,.4)}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.4);transition:color .2s;min-height:32px;display:inline-flex;align-items:center}
.footer-links a:hover{color:rgba(255,255,255,.8)}
@media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:768px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* ========== 滚动渐显 ========== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.revealed{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .hero-bg{animation:none}
}

/* roulang page: category1 */
:root {
  --bg: #F7F6F2;
  --bg-elevated: #FFFFFF;
  --bg-dark: #16151D;
  --bg-dark-soft: #1E1D26;
  --text-primary: #17161A;
  --text-body: #2E2D33;
  --text-secondary: #6F6E76;
  --text-tertiary: #9B9A9F;
  --accent: #F04E23;
  --accent-hover: #D9411A;
  --accent-soft: #FDEAE3;
  --border: #E8E6E1;
  --border-dark: #33323A;
  --success: #1E9A6A;
  --warning: #D9A13B;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", Inter, "DIN Alternate", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

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

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 246, 242, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  height: 70px;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}

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

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  position: relative;
  flex-shrink: 0;
}

.brand-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-40%, -50%);
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5.5px 0 5.5px 9px;
  border-color: transparent transparent transparent #fff;
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0 auto;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  padding: 10px 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
  border-radius: 2px;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a.active {
  color: var(--text-primary);
  font-weight: 600;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 12px;
  height: 40px;
  width: 180px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-box svg {
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  margin-right: 8px;
  flex-shrink: 0;
}

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

.header-login {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 4px;
  transition: color 0.2s ease;
}

.header-login:hover {
  color: var(--accent);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 44px;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(240, 78, 35, 0.3);
}

.btn-primary:active {
  transform: scale(0.98);
}

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

.header-cta {
  padding: 0 22px;
  min-height: 40px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== 页面头部 ===== */
.page-hero {
  position: relative;
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 96px 0;
  color: #fff;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(22, 21, 29, 0.6) 20%, rgba(22, 21, 29, 0.35) 70%);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

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

.page-hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}

.page-hero .hero-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-secondary-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  cursor: pointer;
  min-height: 44px;
  transition: all 0.2s ease;
}

.btn-secondary-light:hover {
  background: #fff;
  color: var(--bg-dark);
  border-color: #fff;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 40px;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
}

.hero-points li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

/* ===== 数据条 ===== */
.stats-bar {
  background: var(--bg-dark-soft);
  border-bottom: 1px solid var(--border-dark);
  padding: 32px 0;
}

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

.stat-item {
  text-align: center;
  padding: 16px 8px;
}

.stat-number {
  font-family: Inter, "DIN Alternate", sans-serif;
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-number em {
  font-style: normal;
  font-size: 28px;
  color: var(--accent);
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

/* ===== 板块通用 ===== */
.section {
  padding: 96px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 32px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.section-header .section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 440px;
  line-height: 1.7;
}

/* ===== 核心能力 ===== */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 360px;
  transition: transform 0.6s ease;
}

.feature-visual:hover img {
  transform: scale(1.03);
}

.feature-content h3 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.feature-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
}

.feature-list {
  display: grid;
  gap: 20px;
}

.feature-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-list h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.feature-list p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== 适用场景 ===== */
.scene-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scene-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.scene-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #d8d5ce;
}

.scene-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  overflow: hidden;
  position: relative;
}

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

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

.scene-card-body {
  padding: 24px;
}

.scene-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.scene-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

/* ===== 方案优势 ===== */
.advantage-section {
  background: var(--bg-dark);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.advantage-section .section-header h2 {
  color: #fff;
}

.advantage-section .section-header .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

.advantage-section .section-header {
  border-bottom-color: var(--border-dark);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.advantage-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 2px;
  height: 0;
  background: var(--accent);
  transition: height 0.3s ease;
}

.advantage-card:hover {
  border-color: #44434c;
  transform: translateY(-3px);
}

.advantage-card:hover::after {
  height: 100%;
}

.advantage-number {
  font-family: Inter, "DIN Alternate", sans-serif;
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}

.advantage-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

/* ===== 接入流程 ===== */
.process-section {
  background: var(--bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.process-step {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.process-step::after {
  content: "→";
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--border);
  z-index: 2;
}

.process-step:last-child::after {
  display: none;
}

.step-num {
  font-family: Inter, "DIN Alternate", sans-serif;
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-soft);
  width: 72px;
  height: 72px;
  line-height: 72px;
  border-radius: 50%;
  margin: 0 auto 20px;
}

.process-step h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.process-note {
  text-align: center;
  color: var(--text-secondary);
  font-size: 15px;
}

.process-note a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 64px;
  padding: 16px 8px;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all 0.25s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.25s ease;
}

.faq-icon::before {
  width: 10px;
  height: 1.5px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 1.5px;
  height: 10px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon {
  background: var(--accent);
  border-color: var(--accent);
}

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background: #fff;
}

.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.faq-answer-inner {
  padding: 0 32px 24px 8px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-more {
  text-align: center;
  margin-top: 40px;
}

.faq-more a {
  color: var(--accent);
  font-size: 15px;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 8px;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  padding: 96px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(22, 21, 29, 0.78);
}

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

.cta-section h2 {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

.cta-note .success-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  margin-right: 6px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

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

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

.footer-brand .brand-text {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  max-width: 280px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  transition: all 0.2s ease;
}

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

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

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: all 0.2s ease;
  display: inline-block;
  padding: 4px 0;
}

.footer-col ul a:hover {
  color: #fff;
  padding-left: 8px;
  border-left: 2px solid var(--accent);
}

.footer-contact {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.9;
}

.footer-contact strong {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.4);
  transition: color 0.2s ease;
  padding: 4px 0;
}

.footer-links a:hover {
  color: #fff;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .search-box {
    width: 140px;
  }

  .nav-links {
    gap: 20px;
  }

  .feature-split {
    gap: 40px;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .process-step::after {
    display: none;
  }

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

@media (max-width: 768px) {
  .site-header,
  .header-nav {
    height: 60px;
  }

  .header-nav {
    gap: 12px;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 61px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 0;
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border);
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-links a.active {
    color: var(--accent);
  }

  .header-actions {
    gap: 8px;
  }

  .search-box {
    display: none;
  }

  .header-login {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .page-hero {
    padding: 72px 0;
  }

  .page-hero h1 {
    font-size: 36px;
  }

  .section {
    padding: 64px 0;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 40px;
  }

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

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

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

  .feature-content h3 {
    font-size: 26px;
  }

  .scene-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .process-steps {
    grid-template-columns: 1fr;
  }

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

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

  .cta-section {
    padding: 64px 0;
  }

  .cta-section h2 {
    font-size: 30px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .page-hero h1 {
    font-size: 30px;
  }

  .page-hero .hero-sub {
    font-size: 16px;
  }

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

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary-light {
    width: 100%;
  }

  .hero-points {
    gap: 12px;
    flex-direction: column;
  }

  .stat-number {
    font-size: 32px;
  }

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

  .stats-grid {
    gap: 12px;
  }

  .advantage-card {
    padding: 24px;
  }

  .advantage-number {
    font-size: 36px;
  }

  .footer-grid {
    gap: 24px;
  }
}

/* 无障碍焦点 */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* roulang page: article */
:root {
  --bg: #F7F6F2;
  --bg-elevated: #FFFFFF;
  --bg-dark: #16151D;
  --bg-dark-soft: #1E1D26;
  --text-primary: #17161A;
  --text-body: #2E2D33;
  --text-secondary: #6F6E76;
  --text-tertiary: #8A8990;
  --accent: #F04E23;
  --accent-hover: #D9411A;
  --accent-soft: #FDEAE3;
  --border: #E8E6E1;
  --border-dark: #33323A;
  --success: #1E9A6A;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247,246,242,0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent);
  position: relative;
  flex-shrink: 0;
}
.brand-icon::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-left: 9px solid #fff;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  margin-left: 2px;
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  text-decoration: none;
  padding: 22px 0;
  position: relative;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after,
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  height: 2px;
  background: var(--accent);
}
.nav-links a.active { color: var(--text-primary); font-weight: 600; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 14px;
  height: 40px;
  width: 180px;
  gap: 8px;
  transition: border-color .2s, box-shadow .2s;
}
.search-box svg { width: 16px; height: 16px; color: var(--text-tertiary); flex-shrink: 0; }
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  width: 100%;
  color: var(--text-primary);
}
.search-box input::placeholder { color: var(--text-tertiary); }
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.header-login {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s;
}
.header-login:hover { color: var(--accent); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  border: 1px solid transparent;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  line-height: 1;
  text-decoration: none;
  transition: all .2s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: #fff;
}
.btn-primary:active { transform: scale(.98); }
.header-cta {
  padding: 10px 22px;
  min-height: 44px;
  font-size: 14px;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--text-primary);
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  line-height: 1;
  text-decoration: none;
  transition: all .2s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
}
.btn-ghost:hover {
  background: var(--bg-dark);
  color: #fff;
}
.btn-ghost:active { transform: scale(.98); }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  position: relative;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--text-primary);
  transition: all .25s;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .2s;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 8px; color: var(--text-tertiary); }
.breadcrumb .current { color: var(--text-primary); font-weight: 500; }
.article-column {
  max-width: 760px;
  margin: 0 auto;
}
.article-header {
  padding: 48px 0 32px;
}
.article-header h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--text-primary);
  text-wrap: balance;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-label {
  color: var(--text-tertiary);
}
.meta-item time { font-family: var(--font-num); }
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
}
.article-cover img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
}
.article-content {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-body);
}
.article-content p {
  margin: 0 0 1.5em;
}
.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin: 2em 0 1em;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  margin: 1.6em 0 0.8em;
  color: var(--text-primary);
}
.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin: 1.4em 0 0.6em;
  color: var(--text-primary);
}
.article-content ul,
.article-content ol {
  margin: 0 0 1.5em;
  padding-left: 1.5em;
}
.article-content li { margin-bottom: 8px; }
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--accent-hover); }
.article-content strong { font-weight: 600; color: var(--text-primary); }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 16px 24px;
  margin: 0 0 1.5em;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-primary);
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}
.article-content figure { margin: 0 0 1.5em; }
.article-content figcaption {
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 8px;
}
.article-content code {
  background: #F1F0EC;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, monospace;
}
.article-content pre {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.85);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 1.5em;
}
.article-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.5em;
  font-size: 15px;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content th { background: var(--bg-elevated); font-weight: 600; }
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}
.not-found {
  text-align: center;
  padding: 60px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
}
.not-found p {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.related-section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  margin-top: 48px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  text-decoration: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .25s cubic-bezier(.4,0,.2,1);
}
.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: #DCD9D2;
}
.related-cover {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #EDEBE6;
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}
.related-card:hover .related-cover img { transform: scale(1.05); }
.related-body { padding: 18px 20px 20px; }
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  margin-bottom: 12px;
}
.related-body h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  margin: 0 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .2s;
}
.related-card:hover .related-body h3 { color: var(--accent); }
.date {
  font-size: 13px;
  color: var(--text-secondary);
  font-family: var(--font-num);
}
.back-to-list {
  text-align: center;
  padding: 32px 0;
}
.back-to-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
}
.back-to-list a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 760px;
  margin: 0 auto 48px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  gap: 16px;
}
.pagination-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all .2s;
  padding: 8px 0;
}
.pagination-link:hover { color: var(--accent); }
.pagination-prev {
  border-left: 2px solid var(--border);
  padding-left: 12px;
}
.pagination-prev:hover { border-left-color: var(--accent); }
.pagination-next {
  border-right: 2px solid var(--border);
  padding-right: 12px;
}
.pagination-next:hover { border-right-color: var(--accent); }
.article-cta {
  background: var(--bg-dark);
  border-radius: var(--radius-lg);
  padding: 64px 32px;
  text-align: center;
  margin: 0 0 64px;
  position: relative;
  overflow: hidden;
}
.article-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
}
.cta-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #6FD6AE;
  margin-bottom: 16px;
}
.cta-badge::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #6FD6AE;
  margin-right: 6px;
  vertical-align: 2px;
}
.article-cta h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.article-cta p {
  color: rgba(255,255,255,0.6);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.article-cta .btn-ghost {
  color: rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.5);
}
.article-cta .btn-ghost:hover {
  color: #fff;
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}
.site-footer {
  background: var(--bg-dark);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .brand-text { color: #fff; }
.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  line-height: 1.7;
  margin: 16px 0 20px;
  max-width: 320px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-dark);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: all .2s;
}
.footer-social a:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 16px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.6;
  transition: all .2s;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
  border-left: 2px solid var(--accent);
}
.footer-contact {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  line-height: 1.8;
}
.footer-contact strong {
  color: rgba(255,255,255,0.9);
  font-weight: 600;
}
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color .2s;
}
.footer-links a:hover { color: #fff; }
@media (max-width: 1024px) {
  .search-box { display: none; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-header { position: sticky; }
  .header-nav { height: 60px; gap: 12px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    flex-direction: column;
    padding: 8px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    width: 100%;
    padding: 15px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links li:last-child a { border-bottom: none; }
  .nav-links a::after { display: none; }
  .nav-links a.active { color: var(--accent); }
  .header-login { display: none; }
  .nav-toggle { display: block; }
  .header-cta { padding: 8px 16px; font-size: 13px; min-height: 36px; }
  .article-header h1 { font-size: 30px; }
  .article-cover img { height: 260px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-cta { padding: 48px 20px; }
  .article-cta h2 { font-size: 26px; }
  .article-pagination { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .brand-text { font-size: 16px; }
  .brand-icon { width: 24px; height: 24px; border-radius: 7px; }
  .brand-icon::after { border-left-width: 8px; border-top-width: 5px; border-bottom-width: 5px; }
  .header-cta { padding: 7px 12px; font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-header h1 { font-size: 26px; }
  .article-header { padding: 32px 0 24px; }
  .article-content { font-size: 16px; }
  .article-cover img { height: 200px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .article-cta .btn-primary,
  .article-cta .btn-ghost { width: 100%; max-width: 320px; }
  .section-head h2 { font-size: 26px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}