/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --brand-900:#1A1633;
  --brand-800:#262052;
  --brand-700:#3B2F7A;
  --brand-600:#4B3CA8;
  --brand-500:#5B49C8;
  --brand-100:#EDEAFB;
  --accent-500:#E0A23A;
  --accent-700:#A8721C;
  --teal-600:#16837C;
  --bg:#F7F6FA;
  --surface:#FFFFFF;
  --surface-2:#F1EFFA;
  --line:#E7E4F0;
  --text:#262138;
  --text-2:#5C5871;
  --text-3:#8B87A0;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(26,22,51,.06);
  --shadow-2:0 8px 24px -12px rgba(26,22,51,.18);
  --shadow-3:0 16px 36px -16px rgba(26,22,51,.26);
  --container:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

/* ========== reset / base ========== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out;}
a:hover{color:var(--brand-700);}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:0;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
::selection{background:var(--brand-100);color:var(--brand-900);}

/* ========== 容器与通用板块 ========== */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:80px 0;}
.section-alt{background:var(--surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-title{font-size:30px;margin-bottom:12px;color:var(--text);}
.section-sub{font-size:16px;color:var(--text-2);line-height:1.8;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head-row .section-head{margin-bottom:0;}
.link-more{font-size:15px;font-weight:600;color:var(--brand-600);white-space:nowrap;border-bottom:2px solid transparent;padding-bottom:2px;}
.link-more:hover{color:var(--brand-700);border-bottom-color:var(--brand-500);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand-600);background:var(--brand-100);
  border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;line-height:1;
  padding:6px 10px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);
}
.tag-teal{background:rgba(22,131,124,.1);color:var(--teal-600);}
.tag-accent{background:rgba(224,162,58,.16);color:var(--accent-700);}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn:disabled,.btn.is-disabled{opacity:.5;pointer-events:none;}
.btn-primary{background:var(--brand-500);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-3);}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--brand-700);}
.btn-outline:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff;}
.btn-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px);}
.btn-accent{background:var(--accent-500);color:#3A2708;}
.btn-accent:hover{background:#EFB44F;color:#3A2708;transform:translateY(-2px);box-shadow:var(--shadow-3);}
.btn-sm{height:36px;padding:0 14px;font-size:14px;}
.btn-block{width:100%;}

/* ========== 顶部导航 ========== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;align-items:center;gap:20px;
  height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--text);font-size:17px;font-weight:700;}
.logo:hover{color:var(--brand-600);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-900));
  display:grid;place-items:center;color:#fff;
}
.logo-mark svg{width:18px;height:18px;}
.logo-text{white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-links a{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 12px;border-radius:8px;
  font-size:15px;color:var(--text-2);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-links a:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-links a.active{color:var(--text);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand-500);
}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search{position:relative;display:flex;align-items:center;}
.search svg{position:absolute;left:12px;width:16px;height:16px;color:var(--text-3);pointer-events:none;}
.search input{
  width:240px;height:40px;
  padding:0 12px 0 36px;
  border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--surface-2);color:var(--text);font-size:14px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;
}
.search input::placeholder{color:var(--text-3);}
.search input:focus{
  outline:none;background:#fff;
  border-color:var(--brand-600);
  box-shadow:0 0 0 2px rgba(75,60,168,.18);
}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-btn);
  align-items:center;justify-content:center;color:var(--text);
  border:1px solid var(--line);background:var(--surface);
}
.menu-toggle:hover{background:var(--brand-100);color:var(--brand-600);}
.menu-toggle svg{width:20px;height:20px;}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(26,22,51,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;z-index:70;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;
  background:var(--surface);z-index:80;
  transform:translateX(100%);transition:transform .24s ease-out;
  padding:20px;overflow-y:auto;
  box-shadow:var(--shadow-3);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{width:40px;height:40px;border-radius:var(--radius-btn);border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2);}
.drawer-close:hover{background:var(--brand-100);color:var(--brand-600);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:20px;}
.drawer-nav a{padding:12px 14px;border-radius:var(--radius-btn);font-size:15px;color:var(--text-2);background:var(--surface-2);}
.drawer-nav a:hover{background:var(--brand-100);color:var(--brand-600);}
.drawer-nav a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.drawer .search{width:100%;margin-bottom:16px;}
.drawer .search input{width:100%;}

/* ========== Hero ========== */
.hero{
  position:relative;
  background:linear-gradient(140deg,var(--brand-900) 0%,var(--brand-800) 52%,var(--brand-700) 100%);
  color:#fff;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 12% 22%, rgba(255,255,255,.16) 0 1.4px, transparent 2px),
    radial-gradient(circle at 68% 14%, rgba(224,162,58,.16) 0 1.4px, transparent 2px),
    radial-gradient(circle at 34% 78%, rgba(255,255,255,.13) 0 1.4px, transparent 2px),
    radial-gradient(circle at 88% 62%, rgba(255,255,255,.11) 0 1.2px, transparent 2px);
  background-size:230px 230px, 260px 260px, 210px 210px, 250px 250px;
  background-position:0 0, 40px 90px, 110px 30px, 160px 130px;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:center;
  padding:80px 0 64px;
}
.hero-copy{max-width:640px;}
.hero .eyebrow{background:rgba(255,255,255,.12);color:#E9E5FF;}
.hero h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.3;
  margin-bottom:18px;
  color:#fff;
}
.hero-sub{
  font-size:18px;
  line-height:1.8;
  color:rgba(255,255,255,.76);
  margin-bottom:28px;
  max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px;}
.hero-note{font-size:14px;color:rgba(255,255,255,.6);}
.hero-media{position:relative;}
.hero-media .frame{
  position:relative;
  aspect-ratio:16/10;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--surface-2);
  box-shadow:0 24px 50px -24px rgba(0,0,0,.6);
  border:1px solid rgba(255,255,255,.14);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-badge{
  position:absolute;left:20px;bottom:-16px;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-500);color:#3A2708;
  font-size:13px;font-weight:700;
  padding:8px 14px;border-radius:999px;
  box-shadow:var(--shadow-2);
}
.metrics{
  position:relative;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  padding:28px 0 36px;
  border-top:1px solid rgba(255,255,255,.14);
}
.metric-title{
  font-size:24px;font-weight:700;color:var(--accent-500);
  line-height:1.4;margin-bottom:6px;
}
.metric-label{font-size:14px;color:rgba(255,255,255,.7);line-height:1.7;}

/* ========== 价值主张 ========== */
.value-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.value-item{padding:36px 32px;border-right:1px solid var(--line);}
.value-item:last-child{border-right:0;}
.value-num{
  font-size:14px;font-weight:700;color:var(--brand-500);
  letter-spacing:.08em;margin-bottom:14px;
}
.value-item h3{font-size:19px;margin-bottom:10px;}
.value-item p{font-size:15px;color:var(--text-2);line-height:1.85;}

/* ========== 功能分组卡 ========== */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feature-card{
  display:flex;gap:20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);border-color:#DED9F3;}
.feature-icon{
  width:48px;height:48px;flex-shrink:0;border-radius:12px;
  background:var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.feature-icon svg{width:22px;height:22px;}
.feature-card:hover .feature-icon{background:rgba(224,162,58,.2);color:var(--accent-700);}
.feature-body h3{font-size:19px;margin-bottom:10px;}
.feature-body p{font-size:15px;color:var(--text-2);line-height:1.85;margin-bottom:12px;}
.feature-link{font-size:15px;font-weight:600;color:var(--brand-600);}
.feature-link:hover{color:var(--brand-700);}

/* ========== 使用场景 ========== */
.scene-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  margin-bottom:64px;
}
.scene-row:last-child{margin-bottom:0;}
.scene-row.reverse .scene-media{order:2;}
.scene-num{font-size:14px;font-weight:700;color:var(--text-3);letter-spacing:.1em;margin-bottom:12px;}
.scene-copy h3{font-size:24px;margin-bottom:14px;}
.scene-copy p{font-size:16px;color:var(--text-2);line-height:1.85;margin-bottom:16px;}
.scene-list{display:flex;flex-direction:column;gap:10px;}
.scene-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2);line-height:1.75;}
.scene-list li::before{
  content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);margin-top:11px;
}
.scene-media{
  aspect-ratio:16/11;border-radius:var(--radius-card);overflow:hidden;
  background:var(--surface-2);border:1px solid var(--line);
  box-shadow:var(--shadow-2);
}
.scene-media img{width:100%;height:100%;object-fit:cover;}

/* ========== 成功案例 ========== */
.case-track{
  display:flex;gap:24px;
  overflow-x:auto;
  padding-bottom:12px;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
}
.case-track::-webkit-scrollbar{display:none;}
.case-card{
  flex:0 0 calc((100% - 48px) / 2.5);
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);}
.case-cover{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden;}
.case-cover img{width:100%;height:100%;object-fit:cover;}
.case-body{padding:22px;}
.case-body h3{font-size:17px;margin-bottom:10px;}
.case-body p{font-size:15px;color:var(--text-2);line-height:1.8;margin-bottom:14px;}
.case-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}

/* ========== 方案与费用 ========== */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.plan{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:32px 28px;
  display:flex;flex-direction:column;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.plan:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);}
.plan.featured{
  border:1px solid var(--brand-700);
  box-shadow:var(--shadow-2);
  transform:scale(1.02);
}
.plan.featured:hover{transform:scale(1.02) translateY(-2px);}
.plan-tag{
  position:absolute;top:-13px;left:28px;
  background:var(--accent-500);color:#3A2708;
  font-size:13px;font-weight:700;
  padding:5px 12px;border-radius:999px;
}
.plan h3{font-size:20px;margin-bottom:8px;}
.plan-scope{font-size:14px;color:var(--text-3);margin-bottom:20px;line-height:1.75;}
.plan-list{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.plan-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2);line-height:1.7;}
.plan-list svg{width:18px;height:18px;flex-shrink:0;margin-top:5px;color:var(--brand-500);}
.plan .btn{margin-top:auto;}
.plan-note{
  margin-top:24px;font-size:13px;color:var(--text-3);
  text-align:center;line-height:1.8;
}

/* ========== 内容动态 ========== */
.news-layout{display:grid;grid-template-columns:1fr;gap:20px;}
.news-main{
  display:grid;grid-template-columns:5fr 7fr;gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.news-main:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);}
.news-main-cover{background:var(--surface-2);min-height:220px;overflow:hidden;}
.news-main-cover img{width:100%;height:100%;object-fit:cover;}
.news-main-body{padding:28px 32px;display:flex;flex-direction:column;justify-content:center;}
.news-main-body h3{font-size:21px;margin-bottom:12px;line-height:1.5;}
.news-main-body h3 a{color:var(--text);}
.news-main-body h3 a:hover{color:var(--brand-600);}
.news-main-body p{font-size:15px;color:var(--text-2);line-height:1.85;margin-bottom:16px;}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.news-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.news-row{
  display:grid;
  grid-template-columns:1fr auto;
  gap:24px;
  align-items:center;
  padding:20px 28px;
  border-bottom:1px solid var(--line);
  transition:background-color .18s ease-out;
}
.news-row:last-child{border-bottom:0;}
.news-row:hover{background:var(--surface-2);}
.news-row h3{font-size:16px;margin-bottom:6px;line-height:1.6;}
.news-row h3 a{color:var(--text);}
.news-row h3 a:hover{color:var(--brand-600);}
.news-row .excerpt{
  font-size:14px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row-side{display:flex;flex-direction:column;align-items:flex-end;gap:10px;flex-shrink:0;}
.news-row-side .date{font-size:13px;color:var(--text-3);}
.news-row-arrow{color:var(--brand-500);display:inline-flex;}
.news-row-arrow svg{width:18px;height:18px;}
.empty-state{
  background:var(--surface);
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  padding:56px 24px;
  text-align:center;
}
.empty-state svg{width:40px;height:40px;color:var(--text-3);margin:0 auto 16px;}
.empty-state p{font-size:15px;color:var(--text-2);margin-bottom:20px;}

/* ========== FAQ ========== */
.faq{max-width:860px;margin:0 auto;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{
  border-left:3px solid var(--brand-600);
  box-shadow:var(--shadow-2);
}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;
  font-size:16px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
  transition:color .18s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item[open] summary{font-weight:700;color:var(--brand-700);}
.faq-arrow{
  flex-shrink:0;width:20px;height:20px;color:var(--text-3);
  transition:transform .2s ease-out;
}
.faq-item[open] .faq-arrow{transform:rotate(180deg);color:var(--brand-600);}
.faq-answer{padding:0 24px 22px;font-size:15px;color:var(--text-2);line-height:1.8;}

/* ========== CTA 带 ========== */
.cta-band{
  position:relative;
  background:linear-gradient(120deg,var(--brand-900),var(--brand-700));
  color:#fff;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 18% 30%, rgba(255,255,255,.15) 0 1.4px, transparent 2px),
    radial-gradient(circle at 74% 70%, rgba(224,162,58,.16) 0 1.4px, transparent 2px);
  background-size:220px 220px, 240px 240px;
  background-position:10px 20px, 90px 10px;
}
.cta-inner{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  padding:56px 0;
}
.cta-copy h2{font-size:26px;margin-bottom:10px;color:#fff;}
.cta-copy p{font-size:16px;color:rgba(255,255,255,.76);max-width:600px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0;}

/* ========== 页脚 ========== */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:48px;
  padding:64px 0 40px;
}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand .logo:hover{color:#fff;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);margin-bottom:20px;max-width:320px;}
.footer-social{display:flex;gap:10px;}
.footer-social span{
  width:38px;height:38px;border-radius:10px;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);
  display:grid;place-items:center;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.footer-social span:hover{background:var(--brand-500);color:#fff;}
.footer-social svg{width:17px;height:17px;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a,.footer-col .plain{
  font-size:14px;color:rgba(255,255,255,.72);
  transition:color .18s ease-out;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ========== 返回顶部 ========== */
.backtop{
  position:fixed;right:24px;bottom:24px;
  width:46px;height:46px;border-radius:50%;
  background:var(--brand-500);color:#fff;
  display:grid;place-items:center;
  box-shadow:var(--shadow-3);z-index:50;
  opacity:0;visibility:hidden;
  transition:opacity .2s ease-out,visibility .2s ease-out,background-color .2s ease-out,transform .2s ease-out;
}
.backtop.show{opacity:1;visibility:visible;}
.backtop:hover{background:var(--brand-600);transform:translateY(-2px);color:#fff;}
.backtop svg{width:20px;height:20px;}

/* ========== 响应式 ========== */
@media (max-width:1279px){
  .hero-inner{grid-template-columns:6fr 6fr;gap:40px;}
  .case-card{flex:0 0 calc((100% - 48px) / 2.2);}
}
@media (max-width:1023px){
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .nav-links{display:none;}
  .search{display:none;}
  .nav-tools .btn{display:none;}
  .menu-toggle{display:inline-flex;}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:64px 0 48px;}
  .hero-copy{max-width:none;}
  .hero-sub{max-width:none;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:20px;}
  .value-grid{grid-template-columns:1fr;}
  .value-item{border-right:0;border-bottom:1px solid var(--line);}
  .value-item:last-child{border-bottom:0;}
  .feature-grid{grid-template-columns:1fr;}
  .scene-row{grid-template-columns:1fr;gap:28px;margin-bottom:48px;}
  .scene-row.reverse .scene-media{order:0;}
  .plans{grid-template-columns:1fr;gap:20px;}
  .plan.featured{transform:none;}
  .plan.featured:hover{transform:translateY(-2px);}
  .news-main{grid-template-columns:1fr;}
  .news-main-cover{min-height:180px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:48px 0 32px;}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px;padding:48px 0;}
  .case-card{flex:0 0 78%;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .nav{height:56px;gap:12px;}
  .logo{font-size:15px;}
  .logo-mark{width:30px;height:30px;border-radius:9px;}
  .section-title{font-size:24px;}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:12px;}
  .hero-inner{padding:48px 0 40px;}
  .hero h1{font-size:26px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{flex:1 1 auto;min-height:46px;}
  .metrics{grid-template-columns:1fr 1fr;gap:18px;padding:22px 0 28px;}
  .metric-title{font-size:20px;}
  .value-item{padding:26px 22px;}
  .feature-card{padding:22px;gap:16px;}
  .scene-copy h3{font-size:20px;}
  .case-card{flex:0 0 88%;}
  .news-row{grid-template-columns:1fr;gap:12px;padding:18px 20px;}
  .news-row-side{flex-direction:row;align-items:center;justify-content:space-between;width:100%;}
  .news-main-body{padding:22px 20px;}
  .faq-item summary{padding:16px 18px;font-size:15px;}
  .faq-answer{padding:0 18px 18px;}
  .cta-copy h2{font-size:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;min-height:46px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .backtop{right:16px;bottom:16px;width:42px;height:42px;}
}
@media (max-width:520px){
  .metrics{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --brand-900:#1A1633;
  --brand-800:#262052;
  --brand-700:#3B2F7A;
  --brand-600:#4B3CA8;
  --brand-500:#5B49C8;
  --brand-100:#EDEAFB;
  --accent-500:#E0A23A;
  --accent-700:#A8721C;
  --teal-600:#16837C;
  --bg:#F7F6FA;
  --surface:#FFFFFF;
  --surface-2:#F1EFFA;
  --line:#E7E4F0;
  --text:#262138;
  --text-2:#5C5871;
  --text-3:#8B87A0;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(26,22,51,.06);
  --shadow-2:0 8px 24px -12px rgba(26,22,51,.18);
  --shadow-3:0 16px 36px -16px rgba(26,22,51,.26);
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:64px;--s9:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:0;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
::selection{background:var(--brand-100);color:var(--brand-700);}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;flex:0 0 auto;}
.logo:hover{color:var(--brand-700);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-800));color:#fff;
  box-shadow:0 6px 14px -8px rgba(75,60,168,.9);
}
.logo-mark svg{width:19px;height:19px;}
.logo-text{font-size:17px;font-weight:700;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-links a{
  position:relative;padding:8px 12px;font-size:15px;color:var(--text-2);
  border-radius:8px;transition:color .2s ease-out,background-color .2s ease-out;white-space:nowrap;
}
.nav-links a:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-links a.active{color:var(--brand-700);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search{position:relative;display:flex;align-items:center;}
.search svg{position:absolute;left:13px;width:16px;height:16px;color:var(--text-3);pointer-events:none;}
.search input{
  width:240px;height:40px;padding:0 16px 0 38px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg);
  color:var(--text);font-size:14px;font-family:inherit;transition:border-color .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out;
}
.search input::placeholder{color:var(--text-3);}
.search input:focus{outline:none;background:var(--surface);border-color:var(--brand-600);box-shadow:0 0 0 2px rgba(75,60,168,.18);}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--brand-700);cursor:pointer;align-items:center;justify-content:center;
  transition:background-color .2s ease-out,border-color .2s ease-out;
}
.menu-toggle:hover{background:var(--brand-100);border-color:var(--brand-100);}
.menu-toggle svg{width:20px;height:20px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand-500);color:#fff;box-shadow:0 8px 18px -12px rgba(91,73,200,.9);}
.btn-primary:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-3);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:var(--surface);color:var(--brand-700);border-color:var(--line);}
.btn-outline:hover{color:var(--brand-600);border-color:var(--brand-500);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-gold{background:var(--accent-500);color:#2A1E05;box-shadow:0 10px 22px -14px rgba(168,114,28,.9);}
.btn-gold:hover{background:#D3942C;color:#2A1E05;transform:translateY(-2px);box-shadow:var(--shadow-3);}
.btn[disabled]{opacity:.5;pointer-events:none;}

/* ---------- 面包屑 ---------- */
.article-wrap{max-width:780px;margin:0 auto;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  padding:24px 0 0;font-size:13px;color:var(--text-3);line-height:1.6;
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease-out;}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:#C9C4DD;}
.breadcrumb .current{color:var(--text-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章头 ---------- */
.article-head{padding:24px 0 0;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:999px;font-size:13px;font-weight:600;line-height:1;
}
.tag-teal{background:rgba(22,131,124,.10);color:var(--teal-600);}
.tag-soft{background:var(--brand-100);color:var(--brand-700);font-weight:500;}
.article-title{
  font-size:clamp(24px,3.2vw,38px);
  line-height:1.35;font-weight:700;color:var(--text);
  margin:16px 0 18px;overflow-wrap:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:8px 20px;
  font-size:14px;color:var(--text-3);
  padding-bottom:22px;border-bottom:1px solid var(--line);
}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-item svg{width:15px;height:15px;color:var(--brand-600);}
.article-cover{
  margin:32px 0 0;border-radius:var(--radius-img);overflow:hidden;
  background:var(--surface-2);aspect-ratio:16/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover;}

/* ---------- 正文 ---------- */
.article-content{padding:36px 0 0;}
.article-body{
  font-size:16px;line-height:1.85;color:var(--text);
  overflow-wrap:break-word;word-break:break-word;
}
.article-body p{margin:0 0 1em;}
.article-body h2{font-size:24px;line-height:1.35;margin:40px 0 20px;font-weight:700;color:var(--brand-900);}
.article-body h3{font-size:20px;line-height:1.4;margin:28px 0 12px;font-weight:600;color:var(--brand-800);}
.article-body h4{font-size:17px;margin:20px 0 10px;font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 1em;padding-left:1.5em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin:8px 0;line-height:1.75;}
.article-body li::marker{color:var(--brand-500);}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent-700);}
.article-body strong{font-weight:600;color:var(--brand-900);}
.article-body img{width:100%;height:auto;border-radius:var(--radius-img);margin:24px 0;background:var(--surface-2);}
.article-body figure{margin:24px 0;}
.article-body figure img{margin:0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px;line-height:1.6;}
.article-body blockquote{
  margin:24px 0;padding:12px 20px;
  border-left:3px solid var(--brand-600);background:var(--surface-2);
  color:var(--text-2);border-radius:0 var(--radius-img) var(--radius-img) 0;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
.article-body pre{
  background:var(--brand-900);color:#E9E6F8;padding:16px 20px;border-radius:var(--radius-img);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:24px 0;
}
.article-body code{background:var(--surface-2);color:var(--brand-700);padding:2px 6px;border-radius:6px;font-size:14px;}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;background:var(--surface);
}
.article-body th{
  background:var(--surface-2);color:var(--brand-900);text-align:left;font-weight:600;
  padding:10px 14px;border:1px solid var(--line);white-space:nowrap;
}
.article-body td{padding:10px 14px;border:1px solid var(--line);line-height:1.7;}
.article-body tbody tr:nth-child(even){background:#FAF9FD;}

.article-tags{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
}
.article-tags .label{font-size:14px;color:var(--text-3);}
.article-tags a.tag{transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out;}
.article-tags a.tag:hover{background:var(--brand-500);color:#fff;transform:translateY(-2px);}

.empty-state{
  text-align:center;padding:48px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);
}
.empty-state .empty-icon svg{width:26px;height:26px;}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:20px;}

.back-row{display:flex;justify-content:center;padding:48px 0 0;}
.page-bottom-pad{padding-bottom:64px;}

/* ---------- 相关推荐 ---------- */
.related{background:var(--surface-2);padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.section-title{font-size:24px;font-weight:700;color:var(--brand-900);}
.section-sub{font-size:14px;color:var(--text-3);margin-top:6px;}
.section-link{font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap;}
.section-link:hover{color:var(--accent-700);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);color:inherit;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);border-color:#D9D4EC;color:inherit;}
.card-media{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.card-title{font-size:17px;font-weight:600;line-height:1.45;margin:0 0 8px;color:var(--brand-900);}
.card-text{font-size:14px;line-height:1.7;color:var(--text-2);margin:0 0 14px;}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--text-3);}
.card-meta .go{color:var(--brand-600);font-weight:600;}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--brand-900),var(--brand-800));color:#fff;}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.85;
  background-image:
    radial-gradient(circle,rgba(255,255,255,.16) 1px,transparent 1px),
    radial-gradient(circle,rgba(255,255,255,.11) 1px,transparent 1px),
    radial-gradient(circle,rgba(224,162,58,.22) 1px,transparent 1px);
  background-size:220px 220px,180px 180px,260px 260px;
  background-position:0 0,60px 90px,130px 40px;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0;}
.cta-title{font-size:26px;font-weight:700;color:#fff;margin-bottom:8px;}
.cta-text{font-size:15px;line-height:1.8;color:rgba(255,255,255,.78);max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--brand-900);color:rgba(255,255,255,.72);padding-top:64px;overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:
    radial-gradient(circle,rgba(255,255,255,.14) 1px,transparent 1px),
    radial-gradient(circle,rgba(224,162,58,.18) 1px,transparent 1px);
  background-size:230px 230px,300px 300px;
  background-position:20px 30px,150px 120px;
}
.site-footer .container{position:relative;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{color:#fff;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand .logo-text{color:#fff;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.64);margin:16px 0 18px;max-width:360px;}
.footer-social{display:flex;gap:12px;}
.footer-social span{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);
  transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.footer-social span:hover{background:rgba(255,255,255,.16);color:#fff;transform:translateY(-2px);}
.footer-social svg{width:18px;height:18px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease-out;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-col .plain{font-size:14px;color:rgba(255,255,255,.5);}
.footer-bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;
  flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:44px;height:44px;z-index:70;
  border-radius:12px;border:1px solid var(--line);background:var(--surface);
  color:var(--brand-600);display:grid;place-items:center;cursor:pointer;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;
  transition:opacity .2s ease-out,visibility .2s ease-out,transform .2s ease-out;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);background:var(--brand-100);}
.to-top svg{width:20px;height:20px;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .search input{width:190px;}
}
@media (max-width:1023px){
  .container{padding:0 20px;}
  .nav{height:64px;gap:16px;}
  .search{display:none;}
  .menu-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:290px;max-width:82vw;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:80px 20px 24px;background:var(--surface);
    box-shadow:-12px 0 32px rgba(26,22,51,.16);
    transform:translateX(102%);transition:transform .25s ease-out;
    z-index:90;overflow-y:auto;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{padding:12px 14px;font-size:16px;border-radius:10px;}
  .nav-links a:hover{background:var(--brand-100);}
  .nav-links a.active{background:var(--brand-100);}
  .nav-links a.active::after{display:none;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:48px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 16px;}
  .nav{height:56px;}
  .logo-text{font-size:16px;}
  .nav-tools{gap:10px;}
  .breadcrumb{padding-top:20px;}
  .article-title{font-size:24px;margin:14px 0 16px;}
  .article-content{padding-top:28px;}
  .article-body{font-size:15px;line-height:1.85;}
  .article-body h2{font-size:21px;margin:32px 0 16px;}
  .article-body h3{font-size:18px;margin:24px 0 12px;}
  .article-body table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;}
  .related{padding:48px 0;}
  .related-grid{grid-template-columns:1fr;}
  .section-title{font-size:20px;}
  .cta-title{font-size:21px;}
  .cta-band .btn{width:100%;}
  .cta-actions{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important;}
}

/* roulang page: category1 */
:root{
  --brand-900:#1A1633;
  --brand-800:#262052;
  --brand-700:#3B2F7A;
  --brand-600:#4B3CA8;
  --brand-500:#5B49C8;
  --brand-100:#EDEAFB;
  --accent-500:#E0A23A;
  --accent-700:#A8721C;
  --teal-600:#16837C;
  --bg:#F7F6FA;
  --surface:#FFFFFF;
  --surface-2:#F1EFFA;
  --line:#E7E4F0;
  --text:#262138;
  --text-2:#5C5871;
  --text-3:#8B87A0;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(26,22,51,.06);
  --sh-2:0 8px 24px -12px rgba(26,22,51,.18);
  --sh-3:0 16px 36px -16px rgba(26,22,51,.26);
  --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand-700)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.nav{display:flex;align-items:center;gap:20px;min-height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:16px;flex:none}
.logo:hover{color:var(--brand-700)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-700));
  color:#fff;display:grid;place-items:center;
}
.logo-mark svg{width:18px;height:18px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-links a:hover{color:var(--brand-700);background:var(--brand-100)}
.nav-links a.active{color:var(--brand-700);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand-500);
}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;width:250px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface-2);
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;
}
.search:focus-within{border-color:var(--brand-600);background:#fff;box-shadow:0 0 0 2px rgba(75,60,168,.22)}
.search svg{width:16px;height:16px;color:var(--text-3);flex:none}
.search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--text)}
.search input::placeholder{color:var(--text-3)}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  align-items:center;justify-content:center;color:var(--text);background:var(--surface);
  transition:background-color .18s ease-out,border-color .18s ease-out;
}
.menu-toggle:hover{background:var(--brand-100);border-color:var(--brand-500)}
.menu-toggle svg{width:20px;height:20px}
.nav-backdrop{
  position:fixed;inset:0;z-index:55;background:rgba(26,22,51,.45);
  opacity:0;pointer-events:none;transition:opacity .24s ease-out;
}
.nav-backdrop.is-open{opacity:1;pointer-events:auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-primary{background:var(--brand-500);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--sh-3);transform:translateY(-2px)}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--brand-700)}
.btn-outline:hover{border-color:var(--brand-500);background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px)}
.btn-gold{background:var(--accent-500);color:#3A2703;box-shadow:var(--sh-2)}
.btn-gold:hover{background:#D0932F;color:#3A2703;box-shadow:var(--sh-3);transform:translateY(-2px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn:disabled{opacity:.5;pointer-events:none}

/* ---------- 星点纹理 ---------- */
.starfield{position:relative;overflow:hidden}
.starfield::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 8% 24%, rgba(255,255,255,.18) 0 1.2px, transparent 1.4px),
    radial-gradient(circle at 62% 12%, rgba(255,255,255,.14) 0 1.2px, transparent 1.4px),
    radial-gradient(circle at 36% 76%, rgba(255,255,255,.12) 0 1.2px, transparent 1.4px);
  background-size:240px 220px, 300px 260px, 210px 240px;
}
.starfield > *{position:relative;z-index:2}

/* ---------- 分类页头 ---------- */
.page-head{
  background:linear-gradient(135deg,var(--brand-900) 0%,var(--brand-800) 58%,var(--brand-700) 100%);
  color:#fff;padding:48px 0 64px;
}
.page-head-inner{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68)}
.crumb a{color:rgba(255,255,255,.82)}
.crumb a:hover{color:#fff}
.crumb .sep{color:rgba(255,255,255,.4)}
.badge-gold{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;margin-top:20px;
  border-radius:var(--r-pill);background:rgba(224,162,58,.18);
  color:#F0C475;border:1px solid rgba(224,162,58,.35);font-size:13px;font-weight:600;
}
.page-head h1{font-size:clamp(28px,3.6vw,42px);line-height:1.3;color:#fff;margin:16px 0 14px}
.page-head .lead{font-size:17px;line-height:1.75;color:rgba(255,255,255,.78);max-width:56ch}
.page-head .tag-row{margin-top:22px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.page-head-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,.16);
  box-shadow:var(--sh-3);background:rgba(255,255,255,.06);
}
.page-head-media img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;background:var(--brand-100);color:var(--brand-700);border:1px solid transparent;
}
.tag-teal{background:rgba(22,131,124,.1);color:var(--teal-600)}
.tag-gold{background:rgba(224,162,58,.16);color:var(--accent-700)}
.page-head .tag{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.22)}

/* ---------- 板块通用 ---------- */
.section{padding:80px 0}
.section-alt{background:var(--surface-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-head h2{font-size:30px}
.section-sub{margin-top:10px;font-size:15px;color:var(--text-2);max-width:66ch}
.section-dark{
  background:linear-gradient(160deg,var(--brand-900),var(--brand-800) 70%,var(--brand-700));
  color:#fff;
}
.section-dark h2{color:#fff}
.section-dark .section-sub{color:rgba(255,255,255,.74)}
.link-more{font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap}
.link-more:hover{color:var(--brand-700)}

/* ---------- 筛选标签行 ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  height:36px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--surface);color:var(--text-2);font-size:14px;
  transition:border-color .18s ease-out,background-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.chip:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-100)}
.chip.is-active{background:var(--brand-500);border-color:var(--brand-500);color:#fff;font-weight:600}
.empty-hint{
  margin-top:20px;padding:24px;border:1px dashed var(--line);border-radius:var(--r-card);
  background:var(--surface);color:var(--text-2);font-size:14px;text-align:center;
}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#DAD5EC}
.card[hidden]{display:none}
.card-media{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px 20px 22px;flex:1}
.card-body h3{font-size:18px}
.card-body p{
  font-size:14px;line-height:1.8;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-600);
}
.card-link svg{width:14px;height:14px;transition:transform .2s ease-out}
.card:hover .card-link svg{transform:translateX(3px)}

/* ---------- 指标条 ---------- */
.statbar{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:36px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{border-left:1px solid var(--line);padding-left:18px}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{display:block;font-size:30px;font-weight:700;line-height:1.3;color:var(--brand-600)}
.stat-num.accent{color:var(--accent-700)}
.stat-label{font-size:14px;color:var(--text-2)}

/* ---------- 步骤 ---------- */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.step{
  padding:22px;border-radius:var(--r-card);background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  transition:background-color .2s ease-out,transform .2s ease-out;
}
.step:hover{background:rgba(255,255,255,.11);transform:translateY(-2px)}
.step-num{display:block;font-size:14px;font-weight:700;letter-spacing:.08em;color:var(--accent-500)}
.step h3{margin:10px 0 8px;font-size:17px;color:#fff}
.step p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.74)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq details:hover{box-shadow:var(--sh-2)}
.faq details[open]{border-left:3px solid var(--brand-700)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .chev{width:18px;height:18px;flex:none;color:var(--text-3);transition:transform .2s ease-out}
.faq details[open] summary .chev{transform:rotate(180deg)}
.faq details[open] summary{color:var(--brand-700)}
.faq .faq-body{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text-2)}

/* ---------- 相关分类 ---------- */
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.related a{
  display:block;padding:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.related a:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:var(--brand-500)}
.related h3{font-size:20px;color:var(--text)}
.related a:hover h3{color:var(--brand-700)}
.related p{margin-top:10px;font-size:14px;color:var(--text-2)}
.related .card-link{margin-top:16px}

/* ---------- CTA 带 ---------- */
.cta{
  background:linear-gradient(120deg,var(--brand-800),var(--brand-700));
  color:#fff;padding:56px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px}
.cta h2{font-size:26px;color:#fff}
.cta p{margin-top:8px;font-size:15px;color:rgba(255,255,255,.78);max-width:56ch}
.cta-actions{display:flex;gap:12px;flex:none}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-brand .logo{color:#fff}
.footer-brand .logo:hover{color:#fff}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:36ch}
.footer-social{display:flex;gap:12px;margin-top:18px}
.footer-social span{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.82);
  transition:background-color .18s ease-out,color .18s ease-out;
}
.footer-social span:hover{background:rgba(255,255,255,.16);color:#fff}
.footer-social svg{width:16px;height:16px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col li{margin-bottom:10px;font-size:14px}
.footer-col a{color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-col .plain{color:rgba(255,255,255,.6)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .card-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1023px){
  .page-head-inner{grid-template-columns:1fr;gap:32px}
  .page-head{padding:40px 0 56px}
  .nav-links{
    position:fixed;top:0;right:0;z-index:70;height:100vh;width:min(84vw,320px);
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    margin-left:0;padding:84px 20px 24px;background:var(--surface);
    box-shadow:var(--sh-3);transform:translateX(105%);
    transition:transform .24s ease-out;overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links a{padding:12px 14px;font-size:16px}
  .nav-links a.active{background:var(--brand-100)}
  .nav-links a.active::after{display:none}
  .search{display:none}
  .menu-toggle{display:inline-flex}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .step-grid{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:64px 0}
  .section-head h2{font-size:26px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  .container{padding:0 16px}
  body{font-size:15px}
  .nav{min-height:56px;gap:12px}
  .logo-text{font-size:15px}
  .nav-tools{gap:8px}
  .page-head h1{font-size:26px}
  .page-head .lead{font-size:16px}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2{font-size:23px}
  .card-grid{grid-template-columns:1fr}
  .step-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .related{grid-template-columns:1fr}
  .faq summary{font-size:15px;padding:16px}
  .cta{padding:40px 0}
  .cta h2{font-size:22px}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --brand-900:#1A1633;
  --brand-800:#262052;
  --brand-700:#3B2F7A;
  --brand-600:#4B3CA8;
  --brand-500:#5B49C8;
  --brand-100:#EDEAFB;
  --accent-500:#E0A23A;
  --accent-700:#A8721C;
  --teal-600:#16837C;
  --bg:#F7F6FA;
  --surface:#FFFFFF;
  --surface-2:#F1EFFA;
  --line:#E7E4F0;
  --text:#262138;
  --text-2:#5C5871;
  --text-3:#8B87A0;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(26,22,51,.06);
  --shadow-2:0 8px 24px -12px rgba(26,22,51,.18);
  --shadow-3:0 16px 36px -16px rgba(26,22,51,.26);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out;}
a:hover{color:var(--brand-700);}
button,input{font:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.35;letter-spacing:0;color:var(--brand-900);}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.4em;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

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

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;gap:20px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--brand-900);flex:none;}
.logo:hover{color:var(--brand-700);}
.logo-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--brand-100);color:var(--brand-600);flex:none;}
.logo-mark svg{width:20px;height:20px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-links a{position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;font-size:15px;font-weight:500;color:var(--text-2);}
.nav-links a:hover{color:var(--brand-700);}
.nav-links a.active{color:var(--brand-700);font-weight:600;}
.nav-links a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;border-radius:2px;background:var(--brand-500);}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search{position:relative;display:flex;align-items:center;}
.search svg{position:absolute;left:12px;width:16px;height:16px;color:var(--text-3);pointer-events:none;}
.search input{width:240px;height:40px;padding:0 14px 0 36px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--surface-2);font-size:14px;color:var(--text);transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;}
.search input::placeholder{color:var(--text-3);}
.search input:focus{outline:none;background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 2px rgba(75,60,168,.18);}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--brand-700);align-items:center;justify-content:center;cursor:pointer;transition:background-color .18s ease-out;}
.menu-toggle:hover{background:var(--brand-100);}
.menu-toggle svg{width:22px;height:22px;}

/* 移动端抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(26,22,51,.45);opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;z-index:60;}
.nav-drawer{position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);background:#fff;padding:24px;overflow-y:auto;display:flex;flex-direction:column;gap:20px;transform:translateX(105%);transition:transform .26s ease-out;z-index:61;box-shadow:var(--shadow-3);}
.drawer-open .drawer-mask{opacity:1;visibility:visible;}
.drawer-open .nav-drawer{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--brand-700);cursor:pointer;display:grid;place-items:center;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;}
.drawer-nav a{padding:12px 12px;border-radius:var(--radius-btn);font-size:15px;color:var(--text-2);}
.drawer-nav a:hover{background:var(--brand-100);color:var(--brand-700);}
.drawer-nav a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.drawer-search{display:flex;flex-direction:column;gap:8px;}
.drawer-search label{font-size:13px;color:var(--text-2);}
.drawer-search input{height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface-2);font-size:15px;}
.drawer-search input:focus{outline:none;background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 2px rgba(75,60,168,.18);}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;transition:transform .18s ease-out,background-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
.btn svg{width:16px;height:16px;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-500);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-2);}
.btn-accent{background:var(--accent-500);color:#2A1F05;box-shadow:var(--shadow-1);}
.btn-accent:hover{background:#D2942E;color:#2A1F05;box-shadow:var(--shadow-2);}
.btn-outline{border-color:#CFC9E4;background:#fff;color:var(--brand-700);}
.btn-outline:hover{border-color:var(--brand-700);background:var(--brand-100);}
.btn-outline-light{border-color:rgba(255,255,255,.45);background:transparent;color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;}
.btn:active{transform:translateY(1px);}
.btn[disabled]{opacity:.5;pointer-events:none;}

/* ---------- 分类页头 ---------- */
.cat-hero{position:relative;overflow:hidden;color:#fff;padding:44px 0 56px;background-color:var(--brand-900);background-image:linear-gradient(118deg,rgba(26,22,51,.94) 0%,rgba(38,32,82,.92) 52%,rgba(59,47,122,.86) 100%),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;}
.cat-hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(1.6px 1.6px at 14% 26%,rgba(255,255,255,.16) 50%,transparent 51%),radial-gradient(1.4px 1.4px at 68% 18%,rgba(255,255,255,.14) 50%,transparent 51%),radial-gradient(1.6px 1.6px at 84% 62%,rgba(255,255,255,.13) 50%,transparent 51%),radial-gradient(1.3px 1.3px at 34% 78%,rgba(255,255,255,.12) 50%,transparent 51%),radial-gradient(1.2px 1.2px at 52% 46%,rgba(224,162,58,.22) 50%,transparent 51%);}
.cat-hero .container{position:relative;z-index:1;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:22px;}
.breadcrumb a{color:rgba(255,255,255,.82);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .current{color:rgba(255,255,255,.66);}
.cat-hero-inner{max-width:780px;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 16px;padding:4px 12px;border-radius:var(--radius-pill);border:1px solid rgba(224,162,58,.35);background:rgba(224,162,58,.14);color:#F3D8A2;font-size:13px;}
.cat-hero h1{font-size:clamp(26px,3.6vw,40px);font-weight:700;color:#fff;margin:0 0 18px;}
.cat-hero-desc{font-size:17px;line-height:1.8;color:rgba(255,255,255,.78);max-width:660px;margin:0 0 22px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag{font-size:13px;padding:4px 12px;border-radius:var(--radius-pill);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.88);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.metric-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14);}
.metric-num{font-size:24px;font-weight:700;color:var(--accent-500);line-height:1.25;}
.metric-label{font-size:13px;color:rgba(255,255,255,.7);margin-top:4px;}

/* ---------- 通用板块 ---------- */
.section{padding:80px 0;}
.section-alt{background:var(--surface-2);}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{font-size:30px;margin:0 0 20px;}
.section-head p{font-size:16px;color:var(--text-2);margin:0;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 分类布局 ---------- */
.cat-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;align-items:start;}
.cat-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:16px;}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-1);}
.side-title{font-size:14px;font-weight:700;color:var(--brand-900);margin:0 0 12px;}
.side-nav{display:flex;flex-direction:column;gap:2px;}
.side-nav a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--text-2);}
.side-nav a:hover{background:var(--brand-100);color:var(--brand-700);}
.side-note{font-size:13px;line-height:1.8;color:var(--text-2);margin:0 0 12px;}
.side-card .btn{width:100%;}

.module-group{margin-bottom:40px;scroll-margin-top:96px;}
.module-group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:baseline;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:20px;}
.group-index{font-size:14px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.group-head h2{font-size:22px;margin:0;}
.group-intro{font-size:14px;color:var(--text-2);margin:-8px 0 18px;}

.entry{display:grid;grid-template-columns:132px minmax(0,1fr) 36px;gap:20px;align-items:center;padding:18px;margin-bottom:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
.entry:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DAD5EC;}
.entry-thumb{display:block;border-radius:10px;overflow:hidden;aspect-ratio:3/2;background:var(--surface-2);}
.entry-thumb img{width:100%;height:100%;object-fit:cover;}
.entry-body{min-width:0;}
.entry-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px;}
.chip{display:inline-flex;align-items:center;font-size:12px;padding:2px 10px;border-radius:var(--radius-pill);background:var(--brand-100);color:var(--brand-700);}
.chip-teal{background:rgba(22,131,124,.1);color:var(--teal-600);}
.chip-gold{background:rgba(224,162,58,.14);color:var(--accent-700);}
.entry-body h3{font-size:18px;margin:0 0 8px;}
.entry-body h3 a{color:var(--brand-900);}
.entry-body h3 a:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;}
.entry-body p{font-size:14px;line-height:1.75;color:var(--text-2);margin:0;}
.entry-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:10px;font-size:13px;color:var(--text-3);}
.entry-arrow{display:grid;place-items:center;width:36px;height:36px;border-radius:var(--radius-pill);background:var(--brand-100);color:var(--brand-600);transition:background-color .18s ease-out,color .18s ease-out;}
.entry-arrow:hover{background:var(--brand-500);color:#fff;}
.entry-arrow svg{width:16px;height:16px;}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:16px;font-weight:600;color:var(--brand-900);transition:background-color .18s ease-out;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:var(--surface-2);}
.faq-item summary .chev{flex:none;color:var(--brand-600);transition:transform .2s ease-out;}
.faq-item summary .chev svg{width:18px;height:18px;display:block;}
.faq-item[open] summary{box-shadow:inset 3px 0 0 var(--brand-500);background:var(--surface-2);}
.faq-item[open] summary .chev{transform:rotate(180deg);}
.faq-a{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text-2);margin:0;}

/* ---------- 相关分类 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:920px;margin:0 auto;}
.related-card{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DAD5EC;}
.related-card strong{display:block;font-size:17px;color:var(--brand-900);margin-bottom:6px;}
.related-card span{display:block;font-size:14px;color:var(--text-2);line-height:1.7;}
.related-card .arrow{flex:none;width:36px;height:36px;border-radius:var(--radius-pill);background:var(--brand-100);color:var(--brand-600);display:grid;place-items:center;}
.related-card .arrow svg{width:16px;height:16px;}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;overflow:hidden;background-color:var(--brand-900);background-image:linear-gradient(120deg,rgba(26,22,51,.96),rgba(59,47,122,.9));color:#fff;padding:56px 0;}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(1.5px 1.5px at 18% 30%,rgba(255,255,255,.15) 50%,transparent 51%),radial-gradient(1.4px 1.4px at 72% 24%,rgba(255,255,255,.13) 50%,transparent 51%),radial-gradient(1.5px 1.5px at 88% 70%,rgba(224,162,58,.2) 50%,transparent 51%),radial-gradient(1.2px 1.2px at 42% 82%,rgba(255,255,255,.12) 50%,transparent 51%);}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:24px;color:#fff;margin:0 0 10px;}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.76);margin:0;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;overflow:hidden;background:var(--brand-900);color:rgba(255,255,255,.72);padding:64px 0 0;}
.site-footer::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(1.5px 1.5px at 12% 20%,rgba(255,255,255,.12) 50%,transparent 51%),radial-gradient(1.3px 1.3px at 62% 44%,rgba(255,255,255,.1) 50%,transparent 51%),radial-gradient(1.4px 1.4px at 86% 76%,rgba(224,162,58,.16) 50%,transparent 51%);}
.site-footer .container{position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;}
.footer-brand .logo{color:#fff;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand .logo-mark{background:rgba(255,255,255,.1);color:var(--accent-500);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin:16px 0 20px;max-width:340px;}
.footer-social{display:flex;gap:12px;}
.footer-social span{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);transition:background-color .18s ease-out;}
.footer-social span:hover{background:rgba(255,255,255,.16);}
.footer-social svg{width:18px;height:18px;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin:0 0 16px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px;}
.footer-col .plain{font-size:14px;color:rgba(255,255,255,.6);}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.6);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-links a{padding:0 10px;font-size:14px;}
  .search input{width:190px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .search{display:none;}
  .menu-toggle{display:inline-flex;}
  .section{padding:64px 0;}
  .cat-layout{grid-template-columns:1fr;gap:28px;}
  .cat-side{position:static;flex-direction:row;flex-wrap:wrap;}
  .side-card{flex:1 1 280px;}
  .side-nav{flex-direction:row;flex-wrap:wrap;}
  .side-nav a{padding:8px 12px;background:var(--surface-2);}
  .metric-bar{grid-template-columns:repeat(2,1fr);gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  body{font-size:15px;}
  .nav{height:56px;}
  .site-header .logo-text{font-size:15px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:24px;margin-bottom:16px;}
  .cat-hero{padding:32px 0 44px;}
  .cat-hero-desc{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{width:100%;}
  .metric-bar{margin-top:28px;padding-top:22px;}
  .metric-num{font-size:20px;}
  .entry{grid-template-columns:1fr;gap:14px;padding:16px;}
  .entry-thumb{aspect-ratio:16/9;}
  .entry-arrow{display:none;}
  .entry-body h3{font-size:17px;}
  .group-head h2{font-size:19px;}
  .cta-band{padding:44px 0;}
  .cta-inner h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:24px;}
  .tag-row{gap:8px;}
  .metric-bar{grid-template-columns:1fr;}
  .faq-item summary{font-size:15px;padding:16px;}
  .faq-a{padding:0 16px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}