/* roulang page: index */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-brand-soft:#E8F0FE;
  --c-accent-soft:#FDEFE8;
  --c-brand:#1B5FD9;
  --c-brand-deep:#123F8F;
  --c-brand-100:#EAF1FD;
  --c-accent:#E2693C;
  --c-teal:#0E8F86;
  --c-ink:#12233A;
  --c-ink-2:#3D5570;
  --c-muted:#6B7F99;
  --c-line:#E2E8F2;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,35,58,.05);
  --sh-2:0 10px 30px -14px rgba(18,35,58,.20);
  --sh-3:0 18px 44px -18px rgba(18,35,58,.28);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --nav-h:68px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-brand);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--c-brand-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure{margin:0}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:16px}
:focus-visible{outline:3px solid rgba(27,95,217,.30);outline-offset:2px;border-radius:4px}

/* ---------- 通用容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--soft{background:var(--c-surface)}
.section--tint{background:var(--c-brand-soft)}
.section--tight{padding:72px 0}
.section-head{max-width:820px;margin-bottom:38px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--c-brand);background:var(--c-brand-100);
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:14px;
}
.section-head h2{font-size:30px;line-height:1.35;font-weight:600;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--c-ink-2);max-width:800px}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.section-head--row .more-link{
  font-size:14px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;
  color:var(--c-brand);flex:0 0 auto;
}
.section-head--row .more-link i{transition:transform .2s ease}
.section-head--row .more-link:hover i{transform:translateX(4px)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:10px;font-size:15px;font-weight:600;
  line-height:1.2;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1)}
.btn-accent:hover{background:#C9552A;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-outline{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line)}
.btn-outline:hover{border-color:var(--c-brand);color:var(--c-brand);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;color:var(--c-brand);padding:8px 0;border:none}
.btn-ghost i{transition:transform .2s ease}
.btn-ghost:hover{color:var(--c-brand-deep)}
.btn-ghost:hover i{transform:translateX(4px)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:var(--r-sm)}
.btn:disabled,.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;line-height:1.4;
  padding:5px 12px;border-radius:var(--r-pill);
}
.badge-brand{background:var(--c-brand-soft);color:var(--c-brand-deep)}
.badge-teal{background:rgba(14,143,134,.10);color:var(--c-teal)}
.badge-accent{background:var(--c-accent-soft);color:#B44A24}
.tag{
  display:inline-block;font-size:12.5px;color:var(--c-ink-2);
  background:var(--c-bg);border:1px solid var(--c-line);
  padding:4px 10px;border-radius:var(--r-pill);
}

/* ---------- 顶部信息条 ---------- */
.top-bar-info{
  background:var(--c-brand-100);
  border-bottom:1px solid rgba(27,95,217,.10);
  font-size:13px;color:var(--c-brand-deep);
}
.info-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:36px;padding-top:4px;padding-bottom:4px}
.info-left,.info-mid,.info-right{display:flex;align-items:center;gap:10px;white-space:nowrap}
.info-domain{font-family:var(--font-num);font-weight:600;letter-spacing:.02em}
.dot{width:4px;height:4px;border-radius:50%;background:rgba(18,63,143,.35);display:inline-block}
.info-mid{color:var(--c-ink-2)}
.info-link{font-weight:600;color:var(--c-brand-deep)}
.info-link:hover{color:var(--c-brand)}
.btn-mini{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(18,63,143,.28);color:var(--c-brand-deep);background:transparent;
}
.btn-mini:hover{background:var(--c-surface);color:var(--c-brand)}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60}
.main-nav{
  background:var(--c-surface);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.main-nav.is-scrolled{box-shadow:var(--sh-1);border-bottom-color:var(--c-line)}
.nav-inner{display:flex;align-items:center;gap:28px;min-height:var(--nav-h)}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--c-brand) 0%,var(--c-brand-deep) 100%);
  color:#fff;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);
}
.brand-text{font-size:17px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em}
.brand:hover .brand-text{color:var(--c-brand-deep)}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-menu a{
  position:relative;display:inline-flex;align-items:center;
  padding:0 14px;height:var(--nav-h);font-size:15px;font-weight:500;color:var(--c-ink-2);
}
.nav-menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;
  border-radius:3px 3px 0 0;background:var(--c-brand);transform:scaleX(0);transform-origin:center;
  transition:transform .22s ease;
}
.nav-menu a:hover{color:var(--c-brand)}
.nav-menu a:hover::after{transform:scaleX(.5);background:var(--c-brand-soft)}
.nav-menu a.active{color:var(--c-ink);font-weight:600}
.nav-menu a.active::after{transform:scaleX(1)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.icon-btn:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-100)}
.hamburger{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:var(--c-surface);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);transition:transform .25s ease,opacity .25s ease}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{
  display:none;background:var(--c-surface);border-bottom:1px solid var(--c-line);
  box-shadow:var(--sh-2);overflow:hidden;max-height:0;transition:max-height .3s ease;
}
.mobile-drawer.is-open{max-height:420px}
.mobile-drawer ul{padding:12px 24px 22px}
.mobile-drawer li+li{border-top:1px solid var(--c-line)}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;font-size:16px;font-weight:500;color:var(--c-ink-2);
}
.mobile-drawer a.active{color:var(--c-brand);font-weight:600}
.mobile-drawer .drawer-cta{margin-top:16px}
.mobile-drawer .drawer-cta .btn{width:100%}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,#EEF3FB 100%);
  padding:76px 0 84px;
}
.hero::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:460px;height:460px;
  background-image:radial-gradient(rgba(27,95,217,.55) 1.4px,transparent 1.4px);
  background-size:18px 18px;opacity:.06;pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;position:relative;z-index:1}
.hero-badge{margin-bottom:20px}
.hero h1{
  font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.02em;
  color:var(--c-ink);max-width:640px;
}
.hero-sub{
  margin-top:20px;font-size:17px;line-height:1.75;color:var(--c-ink-2);max-width:600px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:38px;
  border-top:1px solid var(--c-line);padding-top:24px;
}
.hero-stats li{
  flex:1 1 140px;min-width:120px;
}
.hero-stats strong{
  display:block;font-family:var(--font-num);font-size:20px;font-weight:700;color:var(--c-ink);
  letter-spacing:-.01em;
}
.hero-stats span{display:block;font-size:12.5px;color:var(--c-muted);margin-top:2px}
.hero-visual{position:relative}
.hero-img-wrap{
  border-radius:var(--r-lg);overflow:hidden;background:#E7EDF6;box-shadow:var(--sh-3);
  aspect-ratio:3/4;
}
.hero-img-wrap img{width:100%;height:100%;object-fit:cover}
.spec-float{
  position:absolute;left:-26px;bottom:32px;width:210px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-3);padding:16px 18px;
}
.spec-float .spec-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted);padding:5px 0}
.spec-float .spec-row strong{font-family:var(--font-num);color:var(--c-ink);font-size:14px;font-weight:600}

/* ---------- 价值总览 ---------- */
.values-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr;
  grid-template-rows:auto auto;gap:20px;
}
.v-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:26px 24px;box-shadow:var(--sh-1);position:relative;
  transition:transform .25s ease,box-shadow .25s ease;
}
.v-card::before{
  content:"";position:absolute;left:0;top:22px;width:3px;height:30px;
  background:var(--c-brand);border-radius:0 3px 3px 0;
}
.v-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.v-card--lead{grid-column:1;grid-row:1 / span 2;padding:34px 30px;background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFF 100%)}
.v-card--wide{grid-column:2 / span 2;grid-row:2}
.v-num{
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--c-brand);
  letter-spacing:.1em;display:block;margin-bottom:14px;
}
.v-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-brand-100);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px;
}
.v-card h3{font-size:20px;font-weight:600;line-height:1.5;margin-bottom:10px}
.v-card p{font-size:14.5px;color:var(--c-ink-2);line-height:1.75}
.v-card--lead h3{font-size:24px}
.v-card--lead p{font-size:15.5px}
.v-list{margin-top:18px;display:grid;gap:9px}
.v-list li{display:flex;gap:9px;font-size:14px;color:var(--c-ink-2);line-height:1.7}
.v-list i{color:var(--c-teal);margin-top:5px;font-size:12px}

/* ---------- 截图滚动轨道 ---------- */
.shot-rail{position:relative}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 22px;scrollbar-width:none;scroll-behavior:smooth;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-card{
  flex:0 0 264px;scroll-snap-align:start;
}
.shot-img{
  border-radius:var(--r-lg);overflow:hidden;background:#E7EDF6;box-shadow:var(--sh-2);
  aspect-ratio:3/4;transition:transform .25s ease,box-shadow .25s ease;
}
.shot-card:hover .shot-img{transform:translateY(-4px);box-shadow:var(--sh-3)}
.shot-img img{width:100%;height:100%;object-fit:cover}
.shot-cap{margin-top:12px;font-size:12.5px;color:var(--c-muted);text-align:center}
.rail-nav{display:flex;align-items:center;gap:12px;justify-content:space-between;margin-top:4px}
.rail-dots{display:flex;gap:8px}
.rail-dot{width:8px;height:8px;border-radius:50%;background:var(--c-line);border:none;padding:0;transition:background-color .2s ease,width .2s ease}
.rail-dot.active{background:var(--c-brand);width:22px;border-radius:var(--r-pill)}
.rail-arrows{display:flex;gap:10px}
.rail-arrow{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--c-ink-2);display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.rail-arrow:hover{border-color:var(--c-brand);color:#fff;background:var(--c-brand)}

/* ---------- 系统要求规格卡 ---------- */
.spec-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:8px 28px;
}
.spec-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.spec-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  padding:16px 0;border-bottom:1px solid var(--c-line);font-size:15px;
}
.spec-list li:nth-last-child(-n+2){border-bottom:none}
.spec-list .k{color:var(--c-muted);font-size:14px;flex:0 0 auto}
.spec-list .v{color:var(--c-ink);font-weight:600;text-align:right;font-family:var(--font-num)}
.spec-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.spec-badges .badge{background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-ink-2)}

/* ---------- 下载按钮组 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.dl-btn{
  display:flex;align-items:center;gap:14px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:18px 20px;box-shadow:var(--sh-1);min-height:78px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.dl-btn:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(27,95,217,.35)}
.dl-icon{
  width:44px;height:44px;border-radius:12px;flex:0 0 auto;
  background:var(--c-brand-100);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;font-size:19px;
}
.dl-text{display:flex;flex-direction:column;line-height:1.4}
.dl-text strong{font-size:16px;font-weight:600;color:var(--c-ink)}
.dl-text small{font-family:var(--font-num);font-size:12.5px;color:var(--c-muted);margin-top:3px}
.dl-btn--accent{background:var(--c-accent);border-color:var(--c-accent)}
.dl-btn--accent .dl-icon{background:rgba(255,255,255,.20);color:#fff}
.dl-btn--accent .dl-text strong{color:#fff}
.dl-btn--accent .dl-text small{color:rgba(255,255,255,.85)}
.dl-btn--accent:hover{border-color:#C9552A;background:#C9552A}
.dl-note{
  margin-top:22px;font-size:13.5px;color:var(--c-ink-2);
  display:flex;align-items:flex-start;gap:8px;line-height:1.7;
}
.dl-note i{color:var(--c-teal);margin-top:5px;font-size:12px}
.qr-row{
  margin-top:24px;display:flex;align-items:center;gap:18px;
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-md);
  padding:18px 22px;max-width:520px;
}
.qr-box{
  width:76px;height:76px;border-radius:var(--r-sm);background:var(--c-brand-100);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;font-size:34px;flex:0 0 auto;
}
.qr-text strong{display:block;font-size:15px;font-weight:600}
.qr-text span{display:block;font-size:13px;color:var(--c-muted);margin-top:4px}

/* ---------- 评价墙 ---------- */
.review-wall{columns:3;column-gap:20px}
.review-card{
  break-inside:avoid;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:24px;margin-bottom:20px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.review-card:nth-child(3n+2){margin-top:22px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,var(--c-brand-soft),var(--c-accent-soft));
  color:var(--c-brand-deep);font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.review-head .who strong{display:block;font-size:14.5px;font-weight:600}
.review-head .who span{display:block;font-size:12.5px;color:var(--c-muted)}
.stars{color:#E8A33D;font-size:12.5px;letter-spacing:2px;margin-bottom:8px}
.review-card p{font-size:14.5px;color:var(--c-ink-2);line-height:1.75}
.review-sum{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:28px;
  border-top:1px solid var(--c-line);padding-top:22px;
}
.review-sum div{display:flex;align-items:baseline;gap:8px}
.review-sum strong{font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--c-brand)}
.review-sum span{font-size:13px;color:var(--c-muted)}

/* ---------- 使用步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.steps::before{
  content:"";position:absolute;left:8%;right:8%;top:24px;height:2px;
  background:repeating-linear-gradient(90deg,var(--c-line) 0 8px,transparent 8px 16px);
}
.step{position:relative;text-align:center;padding-top:0}
.step-num{
  width:48px;height:48px;border-radius:50%;margin:0 auto 18px;
  background:var(--c-surface);border:2px solid var(--c-brand-soft);color:var(--c-brand);
  font-family:var(--font-num);font-weight:700;font-size:16px;
  display:flex;align-items:center;justify-content:center;position:relative;z-index:1;
  box-shadow:var(--sh-1);
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-ink-2);line-height:1.7;max-width:230px;margin:0 auto}

/* ---------- 最新信息（CMS） ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.news-thumb{display:block;background:#E7EDF6;aspect-ratio:16/10;overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1 1 auto}
.news-body .badge{align-self:flex-start;margin-bottom:12px}
.news-body h3{font-size:17px;font-weight:600;line-height:1.55;margin-bottom:10px}
.news-body h3 a{color:var(--c-ink)}
.news-body h3 a:hover{color:var(--c-brand)}
.news-body p{
  font-size:14px;color:var(--c-ink-2);line-height:1.75;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:12.5px;color:var(--c-muted);border-top:1px solid var(--c-line);padding-top:14px;
}
.news-date{font-family:var(--font-num)}
.news-more{color:var(--c-brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.news-more i{transition:transform .2s ease}
.news-card:hover .news-more i{transform:translateX(4px)}
.empty-state{
  grid-column:1 / -1;min-height:260px;background:var(--c-surface);
  border:1px dashed var(--c-line);border-radius:var(--r-md);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;padding:40px 24px;
}
.empty-state i{font-size:34px;color:var(--c-brand-soft)}
.empty-state p{font-size:14.5px;color:var(--c-muted)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px}
.accordion.faq-accordion{
  border:none;background:transparent;
  display:grid;gap:14px;
}
.accordion.faq-accordion .accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.accordion.faq-accordion .accordion-item.is-active{box-shadow:var(--sh-2);border-color:rgba(27,95,217,.28)}
.accordion.faq-accordion .accordion-title{
  border:none;background:transparent;padding:20px 56px 20px 24px;
  font-size:16.5px;font-weight:500;color:var(--c-ink);line-height:1.6;position:relative;
}
.accordion.faq-accordion .accordion-title::before{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--c-muted);transition:transform .25s ease,color .25s ease;
}
.accordion.faq-accordion .accordion-item.is-active .accordion-title{font-weight:600;color:var(--c-brand-deep)}
.accordion.faq-accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(180deg);color:var(--c-brand)}
.accordion.faq-accordion .accordion-content{
  border:none;background:#F8FAFE;padding:18px 24px 22px 24px;
  font-size:15px;color:var(--c-ink-2);line-height:1.85;
  border-top:1px solid var(--c-line);
}
.accordion.faq-accordion .accordion-content::before{
  content:"";position:absolute;left:24px;top:18px;bottom:22px;width:3px;
  background:var(--c-brand);border-radius:3px;
}
.accordion.faq-accordion .accordion-content{position:relative;padding-left:38px}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--c-brand-soft);border-radius:var(--r-lg);
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  border:1px solid rgba(27,95,217,.12);
}
.cta-band h2{font-size:28px;font-weight:600;line-height:1.4;color:var(--c-ink);max-width:560px}
.cta-band p{margin-top:12px;font-size:15px;color:var(--c-ink-2);max-width:560px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F2A4D;color:#fff;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;
  padding-top:64px;padding-bottom:44px;
}
.brand--light .brand-mark{background:rgba(255,255,255,.12);color:#fff;box-shadow:none}
.brand--light .brand-text{color:#fff}
.f-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:300px}
.f-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.f-col ul{display:grid;gap:10px}
.f-col li{font-size:14px;color:rgba(255,255,255,.7);line-height:1.7}
.f-col a{color:rgba(255,255,255,.7)}
.f-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom .container{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:20px;padding-bottom:24px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.6);line-height:1.7}

/* ---------- 进入动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .35s ease,transform .35s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:36px;max-width:none}
  .hero-visual{max-width:420px}
  .spec-float{left:auto;right:-12px}
  .values-grid{grid-template-columns:1fr 1fr;grid-template-rows:auto}
  .v-card--lead{grid-column:1 / -1;grid-row:auto}
  .v-card--wide{grid-column:1 / -1;grid-row:auto}
  .dl-grid{grid-template-columns:1fr 1fr}
  .review-wall{columns:2}
  .news-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:28px}
  .steps::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media screen and (max-width:992px){
  .nav-menu,.nav-actions .btn{display:none}
  .hamburger{display:flex}
  .mobile-drawer{display:block}
}
@media screen and (max-width:768px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head h2{font-size:24px}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px}
  .hero{padding:52px 0 60px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-cta .btn{width:100%}
  .hero-stats{gap:12px}
  .hero-stats li{flex:1 1 45%}
  .spec-float{position:static;width:100%;margin-top:16px;box-shadow:var(--sh-1)}
  .values-grid{grid-template-columns:1fr}
  .v-card--lead{padding:26px 22px}
  .v-card--lead h3{font-size:20px}
  .spec-list{grid-template-columns:1fr}
  .spec-list li:nth-last-child(-n+2){border-bottom:1px solid var(--c-line)}
  .spec-list li:last-child{border-bottom:none}
  .dl-grid{grid-template-columns:1fr}
  .review-wall{columns:1}
  .review-card:nth-child(3n+2){margin-top:0}
  .steps{grid-template-columns:1fr;gap:24px}
  .step p{max-width:none}
  .news-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 24px}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-top:48px}
  .footer-bottom .container{flex-direction:column;align-items:flex-start}
  .info-mid{display:none}
  .info-inner{overflow-x:auto;white-space:nowrap;scrollbar-width:none}
  .info-inner::-webkit-scrollbar{display:none}
  .shot-card{flex:0 0 220px}
}
@media screen and (max-width:520px){
  .hero h1{font-size:26px;line-height:1.35}
  .brand-text{font-size:15px}
  .rail-arrows{display:none}
  .qr-row{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-brand-soft:#E8F0FE;
  --c-accent-soft:#FDEFE8;
  --c-brand:#1B5FD9;
  --c-brand-deep:#123F8F;
  --c-brand-100:#EAF1FD;
  --c-accent:#E2693C;
  --c-teal:#0E8F86;
  --c-ink:#12233A;
  --c-ink-2:#3D5570;
  --c-muted:#6B7F99;
  --c-line:#E2E8F2;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,35,58,.05);
  --sh-2:0 10px 30px -14px rgba(18,35,58,.20);
  --sh-3:0 18px 44px -18px rgba(18,35,58,.28);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;border:0}
a{color:var(--c-brand);text-decoration:none;background-color:transparent}
a:hover{color:var(--c-brand-deep)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:600;color:var(--c-ink);line-height:1.35}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(27,95,217,.30);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:currentColor;opacity:.45;vertical-align:middle;margin:0 8px}

/* ---------- 顶部信息条 ---------- */
.site-header{position:relative;z-index:60}
.top-bar-info{background:var(--c-brand-100);color:var(--c-brand-deep);font-size:13px;line-height:1.6}
.info-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;padding-top:4px;padding-bottom:4px}
.info-left,.info-mid,.info-right{display:flex;align-items:center;white-space:nowrap}
.info-domain{font-family:var(--font-num);font-weight:600;letter-spacing:.02em}
.info-mid{color:var(--c-ink-2)}
.info-link{color:var(--c-brand-deep);font-weight:500}
.info-link:hover{color:var(--c-brand)}
.btn-mini{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;margin-left:14px;
  border:1px solid rgba(27,95,217,.35);border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;color:var(--c-brand-deep);background:#fff;transition:all .2s ease;
}
.btn-mini:hover{background:var(--c-brand);border-color:var(--c-brand);color:#fff}

/* ---------- 主导航 ---------- */
.main-nav{
  position:sticky;top:0;background:#fff;border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.main-nav.is-scrolled{box-shadow:var(--sh-1);border-bottom-color:var(--c-line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-ink)}
.brand:hover{color:var(--c-ink)}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--c-brand) 0%,var(--c-brand-deep) 100%);
  color:#fff;font-size:17px;font-weight:700;font-family:var(--font-cn);
  box-shadow:var(--sh-1);flex:0 0 auto;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:6px;flex:1 1 auto;justify-content:center}
.nav-menu li a{
  position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);transition:color .2s ease;
}
.nav-menu li a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;
  background:var(--c-brand-soft);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-menu li a:hover{color:var(--c-brand)}
.nav-menu li a:hover::after{transform:scaleX(1)}
.nav-menu li a.active{color:var(--c-ink);font-weight:600}
.nav-menu li a.active::after{height:3px;background:var(--c-brand);transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:50%;color:var(--c-ink-2);background:#fff;transition:all .2s ease;
}
.icon-btn:hover{background:var(--c-brand-100);color:var(--c-brand)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1)}
.btn-accent:hover{background:#C8552C;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:#fff;color:var(--c-brand-deep);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-brand);color:var(--c-brand);transform:translateY(-1px)}
.btn-text{background:none;color:var(--c-brand);padding:10px 4px}
.btn-text i{transition:transform .2s ease}
.btn-text:hover i{transform:translateX(4px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.hamburger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:10px;padding:0 11px;
}
.hamburger span{display:block;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .25s ease,opacity .2s ease}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{
  display:none;overflow:hidden;max-height:0;background:#fff;
  border-top:1px solid transparent;transition:max-height .3s ease,border-color .3s ease;
}
.mobile-drawer.is-open{max-height:460px;border-top-color:var(--c-line)}
.mobile-drawer ul{padding:8px 0}
.mobile-drawer ul li a{
  display:flex;align-items:center;min-height:48px;padding:0 24px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);
}
.mobile-drawer ul li a.active{color:var(--c-brand);font-weight:600;background:var(--c-brand-100)}
.drawer-cta{padding-top:8px;padding-bottom:20px}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;background-color:#EEF3FB;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center right;border-bottom:1px solid var(--c-line);
}
.page-head::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.86) 48%,rgba(255,255,255,.62) 100%)}
.page-head .container{position:relative;z-index:2;padding-top:28px;padding-bottom:40px}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-muted);padding-bottom:14px;border-bottom:1px solid var(--c-line);
}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-brand)}
.breadcrumb .sep{color:#B7C4D6}
.breadcrumb .crumb-cat{color:var(--c-ink-2)}
.breadcrumb .crumb-current{color:var(--c-muted);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{padding-top:26px;max-width:860px}
.article-head h1{
  font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.01em;
  margin-bottom:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;font-size:13.5px;color:var(--c-muted)}
.article-meta .m-item{display:inline-flex;align-items:center;gap:6px}
.article-meta i{color:var(--c-brand);font-size:12.5px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;font-weight:600;line-height:1;
}
.badge-brand{background:var(--c-brand-soft);color:var(--c-brand-deep)}
.badge-teal{background:#E2F4F2;color:#0A6B64}
.badge-accent{background:var(--c-accent-soft);color:#A84525}

/* ---------- 正文布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:44px;
  align-items:start;padding-top:40px;padding-bottom:72px;
}
.article-main{min-width:0}
.article-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:36px 40px 40px;min-height:320px;
}
.article-body{font-size:17px;line-height:1.9;color:var(--c-ink-2);max-width:820px}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:26px;line-height:1.4;color:var(--c-ink);font-weight:600;
  margin:40px 0 16px;padding-left:16px;border-left:4px solid var(--c-brand);
  scroll-margin-top:92px;
}
.article-body h3{font-size:20px;line-height:1.5;color:var(--c-ink);margin:30px 0 12px;scroll-margin-top:92px}
.article-body h4{font-size:17px;color:var(--c-ink);margin:22px 0 10px}
.article-body a{color:var(--c-brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;text-decoration-color:rgba(27,95,217,.35)}
.article-body a:hover{color:var(--c-brand-deep);text-decoration-color:var(--c-brand-deep)}
.article-body strong{color:var(--c-ink);font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:.6em;line-height:1.8}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--c-brand);opacity:.85;
}
.article-body ol{counter-reset:olc}
.article-body ol li{counter-increment:olc}
.article-body ol li::before{
  content:counter(olc);position:absolute;left:0;top:.15em;
  width:20px;height:20px;border-radius:6px;background:var(--c-brand-100);color:var(--c-brand-deep);
  font-size:12px;font-weight:700;font-family:var(--font-num);display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--c-brand-soft);
  border-left:3px solid var(--c-brand);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--c-ink-2);font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--c-muted);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body table th,.article-body table td{border:1px solid var(--c-line);padding:12px 14px;text-align:left}
.article-body table th{background:var(--c-brand-100);color:var(--c-brand-deep);font-weight:600}
.article-body table tr:nth-child(even) td{background:#FAFBFE}
.article-body code{background:#EEF3FB;padding:2px 6px;border-radius:6px;font-family:var(--font-num);font-size:14.5px;color:var(--c-brand-deep)}
.empty-state{text-align:center;padding:48px 20px}
.empty-state i{font-size:40px;color:#C3D2E8;margin-bottom:16px;display:block}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--c-muted);margin-bottom:22px}

/* ---------- 文末区 ---------- */
.article-foot{margin-top:34px}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:20px 0;border-top:1px solid var(--c-line)}
.tag-row .t-label{font-size:13.5px;color:var(--c-muted);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-deep);font-size:13px;font-weight:500;
  transition:all .2s ease;
}
.tag:hover{background:var(--c-brand);color:#fff}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.post-nav-card{
  display:flex;flex-direction:column;gap:8px;min-height:96px;
  padding:20px 22px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);transition:all .2s ease;
}
.post-nav-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D2DEEE}
.post-nav-card .pn-label{font-size:12.5px;font-weight:600;color:var(--c-muted);letter-spacing:.04em}
.post-nav-card .pn-title{font-size:15.5px;font-weight:600;color:var(--c-ink);line-height:1.6}
.post-nav-card .pn-desc{font-size:13.5px;color:var(--c-muted);line-height:1.7}
.post-nav-card.is-next{text-align:right;align-items:flex-end}
.back-row{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}
.section-title-sm{font-size:22px;margin-bottom:6px}
.section-sub-sm{font-size:14.5px;color:var(--c-muted);margin-bottom:20px}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:92px}
.aside-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:20px 22px;margin-bottom:18px;
}
.aside-card h3{
  font-size:14px;font-weight:600;color:var(--c-ink);letter-spacing:.02em;
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--c-line);
  display:flex;align-items:center;gap:8px;
}
.aside-card h3 i{color:var(--c-brand);font-size:13px}
.toc-list li{margin-bottom:2px}
.toc-list a{
  display:block;padding:7px 10px;border-radius:var(--r-sm);font-size:13.5px;line-height:1.6;
  color:var(--c-ink-2);border-left:2px solid transparent;transition:all .18s ease;
}
.toc-list a:hover{background:var(--c-brand-100);color:var(--c-brand-deep)}
.toc-list a.current{background:var(--c-brand-100);color:var(--c-brand-deep);font-weight:600;border-left-color:var(--c-brand)}
.aside-links li{margin-bottom:2px}
.aside-links a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 2px;font-size:14px;color:var(--c-ink-2);border-bottom:1px dashed var(--c-line)}
.aside-links li:last-child a{border-bottom:0}
.aside-links a:hover{color:var(--c-brand)}
.aside-links i{font-size:11px;color:#B7C4D6}
.aside-note{font-size:13px;line-height:1.75;color:var(--c-muted);margin:0}
.aside-toggle{display:none}
.to-top{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:44px;border:1px solid var(--c-line);border-radius:10px;font-size:14px;font-weight:600;color:var(--c-ink-2);background:#fff;transition:all .2s ease}
.to-top:hover{border-color:var(--c-brand);color:var(--c-brand);transform:translateY(-1px)}

/* ---------- 相关推荐 ---------- */
.related-section{padding:8px 0 76px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D2DEEE}
.card-media{position:relative;aspect-ratio:16/9;background:#EEF3FB;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-body h3{font-size:17px;line-height:1.55}
.card-body h3 a{color:var(--c-ink)}
.card-body h3 a:hover{color:var(--c-brand)}
.card-excerpt{font-size:14px;line-height:1.75;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;font-size:12.5px;color:var(--c-muted)}

/* ---------- 底部 CTA ---------- */
.cta-band{background:var(--c-brand-soft);border-top:1px solid #D8E5FA;border-bottom:1px solid #D8E5FA}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;padding:48px 0}
.cta-inner h2{font-size:28px;margin-bottom:10px}
.cta-inner p{color:var(--c-ink-2);margin:0;max-width:660px;font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F2A4D;color:#fff;padding-top:60px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.brand--light .brand-text{color:#fff}
.f-brand p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.8;margin-top:16px;max-width:340px}
.f-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.f-col ul li{margin-bottom:10px}
.f-col ul li a,.f-col ul li{color:rgba(255,255,255,.72);font-size:14px;line-height:1.7}
.f-col ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0}
.footer-bottom p{margin:0 0 4px;font-size:12.5px;color:rgba(255,255,255,.6);line-height:1.8}

/* ---------- 动效 ---------- */
.reveal-up{opacity:0;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease}
.reveal-up.is-visible{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:1199px){
  .article-head h1{font-size:38px}
  .article-layout{grid-template-columns:minmax(0,1fr) 264px;gap:32px}
}
@media (max-width:991px){
  .nav-menu{display:none}
  .hamburger{display:flex}
  .mobile-drawer{display:block}
  .info-mid{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-aside{position:static;order:2;margin-top:24px}
  .article-aside .aside-card{display:none}
  .article-aside .aside-card:nth-child(1){display:none}
  .article-aside .aside-body{display:none}
  .article-aside.is-open .aside-body{display:block}
  .aside-toggle{
    display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;
    min-height:52px;padding:0 20px;background:#fff;border:1px solid var(--c-line);
    border-radius:var(--r-md);font-size:15px;font-weight:600;color:var(--c-ink);box-shadow:var(--sh-1);
  }
  .aside-toggle i{color:var(--c-brand)}
  .cta-inner{grid-template-columns:minmax(0,1fr);gap:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .info-inner{gap:12px;overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none}
  .info-inner::-webkit-scrollbar{display:none}
  .info-right .btn-mini{margin-left:10px}
  .brand-text{font-size:15.5px}
  .nav-inner{min-height:60px;gap:12px}
  .article-head h1{font-size:30px}
  .page-head .container{padding-top:20px;padding-bottom:30px}
  .article-card{padding:24px 20px 28px;border-radius:var(--r-sm)}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;margin-top:32px}
  .article-body h3{font-size:18px}
  .post-nav{grid-template-columns:1fr}
  .post-nav-card.is-next{text-align:left;align-items:flex-start}
  .related-grid{grid-template-columns:1fr}
  .cta-inner{padding:38px 0}
  .cta-inner h2{font-size:23px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px}
  .article-layout{padding-bottom:52px}
  .related-section{padding-bottom:56px}
}
@media (max-width:519px){
  .top-bar-info{font-size:12.5px}
  .info-right .info-link{display:none}
  .article-meta{font-size:12.5px;gap:8px 12px}
}

/* roulang page: category1 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-brand-soft:#E8F0FE;
  --c-accent-soft:#FDEFE8;
  --c-brand:#1B5FD9;
  --c-brand-deep:#123F8F;
  --c-brand-100:#EAF1FD;
  --c-accent:#E2693C;
  --c-teal:#0E8F86;
  --c-ink:#12233A;
  --c-ink-2:#3D5570;
  --c-muted:#6B7F99;
  --c-line:#E2E8F2;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,35,58,.05);
  --sh-2:0 10px 30px -14px rgba(18,35,58,.20);
  --sh-3:0 18px 44px -18px rgba(18,35,58,.28);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-brand-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-family:var(--font-sans);}
h1{font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.5px;}
h2{font-size:30px;line-height:1.35;font-weight:600;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
h4{font-size:16px;line-height:1.6;font-weight:600;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(27,95,217,.3);outline-offset:2px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--soft{background:var(--c-brand-soft);}
.section--accent{background:var(--c-accent-soft);}
.section--white{background:var(--c-surface);}

/* ---------- 顶部信息条 ---------- */
.top-bar-info{
  background:var(--c-brand-100);
  color:var(--c-brand-deep);
  font-size:13px;
  line-height:1.5;
  border-bottom:1px solid var(--c-line);
}
.info-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:36px;
  flex-wrap:nowrap;
}
.info-left,.info-mid,.info-right{display:flex;align-items:center;gap:10px;white-space:nowrap;}
.info-left{font-weight:600;}
.info-domain{font-family:var(--font-num);letter-spacing:.3px;}
.info-mid{color:var(--c-brand-deep);opacity:.88;}
.dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:currentColor;opacity:.45;flex:0 0 auto;}
.info-link{font-size:13px;color:var(--c-brand-deep);font-weight:500;}
.info-link:hover{color:var(--c-brand);text-decoration:underline;text-underline-offset:3px;}
.btn-mini{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  font-size:12.5px;
  border:1px solid rgba(18,63,143,.35);
  border-radius:var(--r-pill);
  color:var(--c-brand-deep);
  background:transparent;
  transition:all .22s ease;
}
.btn-mini:hover{background:var(--c-brand-deep);color:#fff;border-color:var(--c-brand-deep);}

/* ---------- 主导航 ---------- */
.site-header{position:relative;z-index:80;}
.main-nav{
  position:sticky;
  top:0;
  z-index:70;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.main-nav.is-stuck{box-shadow:var(--sh-1);border-bottom-color:var(--c-line);}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-ink);font-weight:700;}
.brand:hover{color:var(--c-brand-deep);}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;
  border-radius:10px;
  background:linear-gradient(140deg,var(--c-brand),var(--c-brand-deep));
  color:#fff;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;
  box-shadow:0 6px 14px -8px rgba(27,95,217,.85);
}
.brand-text{font-size:16.5px;letter-spacing:.2px;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-menu a{
  position:relative;
  display:block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--c-ink-2);
}
.nav-menu a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:2px;background:var(--c-brand);
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease,opacity .25s ease;
  opacity:.5;
}
.nav-menu a:hover{color:var(--c-brand);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--c-ink);font-weight:600;}
.nav-menu a.active::after{transform:scaleX(1);height:3px;opacity:1;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);
  background:#fff;
  border-radius:var(--r-sm);
  color:var(--c-ink-2);
  cursor:pointer;
  transition:all .22s ease;
}
.icon-btn:hover{color:var(--c-brand);border-color:var(--c-brand);}
.hamburger{
  display:none;
  width:44px;height:44px;
  flex-direction:column;
  align-items:center;justify-content:center;
  gap:5px;
  border:1px solid var(--c-line);
  background:#fff;
  border-radius:var(--r-sm);
  cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--c-ink-2);border-radius:2px;transition:.25s;}
.hamburger:hover span{background:var(--c-brand);}
.mobile-drawer{display:none;border-top:1px solid var(--c-line);background:#fff;padding:8px 0 18px;}
.mobile-drawer.open{display:block;}
.mobile-drawer ul{padding:0 24px;}
.mobile-drawer li a{
  display:block;
  padding:14px 0;
  font-size:16px;
  color:var(--c-ink-2);
  border-bottom:1px solid var(--c-line);
}
.mobile-drawer li a.active{color:var(--c-brand);font-weight:600;}
.drawer-cta{padding-top:16px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:14px 28px;
  font-size:15px;font-weight:600;line-height:1.2;
  border-radius:10px;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .22s ease;
  text-align:center;
}
.btn-primary{background:var(--c-brand);border-color:var(--c-brand);color:#fff;}
.btn-primary:hover{background:var(--c-brand-deep);border-color:var(--c-brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-accent{background:var(--c-accent);border-color:var(--c-accent);color:#fff;}
.btn-accent:hover{background:#c9532a;border-color:#c9532a;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-outline{background:#fff;border-color:var(--c-line);color:var(--c-ink);}
.btn-outline:hover{border-color:var(--c-brand);color:var(--c-brand);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost{background:transparent;color:var(--c-brand);padding:6px 0;min-height:auto;}
.btn-ghost i{transition:transform .22s ease;}
.btn-ghost:hover{color:var(--c-brand-deep);}
.btn-ghost:hover i{transform:translateX(4px);}
.btn-sm{padding:10px 18px;font-size:14px;min-height:40px;}
.btn-block{width:100%;}

/* ---------- 标签与徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-brand{background:var(--c-brand-soft);color:var(--c-brand-deep);}
.badge-accent{background:var(--c-accent-soft);color:#A8421D;}
.badge-teal{background:rgba(14,143,134,.12);color:var(--c-teal);}
.badge-line{background:#fff;border:1px solid var(--c-line);color:var(--c-ink-2);font-weight:500;}
.badge-dot{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block;}

/* ---------- 面包屑 ---------- */
.crumb-bar{border-bottom:1px solid var(--c-line);background:#fff;}
.crumb{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--c-muted);
  padding:14px 0;
  flex-wrap:wrap;
}
.crumb a{color:var(--c-ink-2);}
.crumb a:hover{color:var(--c-brand);}
.crumb .sep{color:#C3CEDD;}
.crumb .current{color:var(--c-muted);}

/* ---------- 页头 Hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,#EEF3FB 100%);
  border-bottom:1px solid var(--c-line);
}
.page-hero::after{
  content:"";
  position:absolute;right:-40px;bottom:-40px;
  width:420px;height:420px;
  background-image:
    linear-gradient(rgba(27,95,217,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,95,217,.06) 1px,transparent 1px);
  background-size:28px 28px;
  border-radius:50%;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  padding:64px 0 76px;
}
.hero-copy h1{margin-bottom:18px;max-width:640px;}
.hero-sub{
  font-size:17px;
  line-height:1.75;
  color:var(--c-ink-2);
  max-width:620px;
  margin-bottom:28px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:32px;
  padding-top:24px;
  border-top:1px solid var(--c-line);
}
.fact-num{font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--c-ink);line-height:1.3;}
.fact-label{font-size:13px;color:var(--c-muted);}
.hero-visual{position:relative;}
.hero-img{
  width:100%;
  aspect-ratio:4/5;
  object-fit:cover;
  border-radius:var(--r-lg);
  background:#E6ECF5;
  box-shadow:var(--sh-2);
}
.hero-spec{
  position:absolute;
  left:-18px;
  bottom:28px;
  width:220px;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-3);
  padding:16px 18px;
}
.hero-spec .spec-t{font-size:12.5px;color:var(--c-muted);margin-bottom:6px;letter-spacing:.3px;}
.hero-spec .spec-row{display:flex;align-items:center;justify-content:space-between;font-size:14px;color:var(--c-ink-2);padding:5px 0;}
.hero-spec .spec-row b{font-family:var(--font-num);color:var(--c-ink);font-weight:600;}

/* ---------- 区块标题 ---------- */
.sec-head{max-width:820px;margin-bottom:36px;}
.sec-head h2{margin-bottom:14px;}
.sec-lead{font-size:16px;color:var(--c-ink-2);max-width:780px;}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 通用网格 ---------- */
.grid-x{display:flex;flex-flow:row wrap;}
.grid-x>.cell{min-width:0;}
.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px;margin-bottom:24px;}
.grid-margin-x{margin-bottom:-24px;}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  display:flex;flex-direction:column;
  height:100%;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:26px;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D3DEEC;}
.card--top-line::before{
  content:"";position:absolute;left:26px;top:0;width:44px;height:3px;
  background:var(--c-brand);border-radius:0 0 3px 3px;
}
.card--accent::before{background:var(--c-accent);}
.card-num{
  font-family:var(--font-num);
  font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--c-brand);margin-bottom:14px;
}
.card-icon{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--c-brand-soft);color:var(--c-brand);
  font-size:18px;margin-bottom:16px;
}
.card h3{margin-bottom:10px;}
.card p{font-size:15px;line-height:1.75;color:var(--c-ink-2);margin-bottom:0;}
.card-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);display:flex;align-items:center;gap:10px;flex-wrap:wrap;}

/* ---------- 图文横排卡（设备安装方式） ---------- */
.media-card{
  display:grid;
  grid-template-columns:200px 1fr;
  gap:24px;
  align-items:center;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:22px;
  margin-bottom:16px;
  transition:transform .24s ease,box-shadow .24s ease;
}
.media-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.media-card figure{margin:0;}
.media-card img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-sm);background:#E6ECF5;
}
.media-card h3{margin-bottom:8px;}
.media-card p{font-size:15px;color:var(--c-ink-2);margin-bottom:12px;}
.media-tags{display:flex;gap:8px;flex-wrap:wrap;}

/* ---------- 流程 ---------- */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  position:relative;
}
.flow::before{
  content:"";position:absolute;top:22px;left:6%;right:6%;height:2px;
  background:linear-gradient(90deg,var(--c-brand-soft),#CBD9EE,var(--c-brand-soft));
  z-index:0;
}
.flow-step{position:relative;z-index:1;background:transparent;}
.flow-dot{
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:#fff;border:2px solid var(--c-brand);
  color:var(--c-brand);font-family:var(--font-num);font-weight:700;font-size:15px;
  margin-bottom:18px;
}
.flow-step h3{font-size:18px;margin-bottom:8px;}
.flow-step p{font-size:15px;color:var(--c-ink-2);margin-bottom:0;}

/* ---------- 规格卡 ---------- */
.spec-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:16px 24px;
  border-bottom:1px solid var(--c-line);
  font-size:15px;
}
.spec-row:last-child{border-bottom:0;}
.spec-row .k{color:var(--c-muted);flex:0 0 auto;}
.spec-row .v{color:var(--c-ink);font-weight:500;text-align:right;}
.spec-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  margin-bottom:14px;
  overflow:hidden;
  transition:box-shadow .22s ease,border-color .22s ease;
}
.faq-item:hover{border-color:#D3DEEC;}
.faq-item[open]{box-shadow:var(--sh-2);border-color:#D3DEEC;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 56px 20px 24px;
  position:relative;
  font-size:16.5px;
  font-weight:600;
  color:var(--c-ink);
  border-left:3px solid transparent;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:#FAFCFF;}
.faq-item[open] summary{border-left-color:var(--c-brand);background:#FAFCFF;}
.faq-item summary::after{
  content:"+";
  position:absolute;right:22px;top:50%;
  transform:translateY(-50%);
  font-family:var(--font-num);
  font-size:20px;font-weight:500;color:var(--c-brand);
  transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"–";transform:translateY(-50%) rotate(180deg);}
.faq-body{
  padding:4px 24px 22px 27px;
  background:#F7F9FD;
  border-top:1px solid var(--c-line);
}
.faq-body p{font-size:15px;color:var(--c-ink-2);padding-top:16px;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-brand-soft);
  border:1px solid #D6E4FB;
  border-radius:var(--r-lg);
  padding:48px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:32px;
  align-items:center;
}
.cta-band h2{margin-bottom:12px;}
.cta-band p{font-size:16px;color:var(--c-ink-2);max-width:640px;margin-bottom:0;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F2A4D;color:rgba(255,255,255,.72);margin-top:0;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding:68px 0 44px;
}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.3px;}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);}
.brand--light{color:#fff;margin-bottom:16px;}
.brand--light .brand-text{color:#fff;}
.brand--light:hover{color:#fff;}
.f-col ul li{margin-bottom:10px;}
.f-col ul li a{font-size:14px;color:rgba(255,255,255,.72);}
.f-col ul li a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:6px;}

/* ---------- 进入动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease;}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 20px;}
  .hero-grid{gap:36px;}
}
@media (max-width:1024px){
  h1{font-size:36px;}
  h2{font-size:26px;}
  .hero-grid{grid-template-columns:1fr;padding:48px 0 60px;}
  .hero-visual{max-width:460px;}
  .hero-spec{left:auto;right:16px;bottom:-16px;}
  .flow{grid-template-columns:repeat(2,1fr);}
  .flow::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .nav-menu{display:none;}
  .hamburger{display:flex;}
  .nav-actions .btn-sm{display:none;}
  .section{padding:64px 0;}
  .cta-band{grid-template-columns:1fr;padding:36px;}
  .info-mid{display:none;}
}
@media (max-width:767px){
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .info-right .info-link{display:none;}
  .info-inner{overflow-x:auto;scrollbar-width:none;}
  .info-inner::-webkit-scrollbar{display:none;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn{width:100%;}
  .hero-facts{gap:20px;}
  .media-card{grid-template-columns:1fr;gap:16px;}
  .media-card img{aspect-ratio:16/9;}
  .flow{grid-template-columns:1fr;}
  .spec-row{flex-direction:column;align-items:flex-start;gap:4px;}
  .spec-row .v{text-align:left;}
  .cta-band{padding:28px 22px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 32px;}
  .hero-spec{position:static;width:100%;margin-top:16px;left:auto;right:auto;bottom:auto;}
}
@media (max-width:520px){
  .card{padding:22px;}
  .card--top-line::before{left:22px;}
  .faq-item summary{padding:18px 48px 18px 18px;font-size:15.5px;}
  .faq-item summary::after{right:16px;}
  .faq-body{padding:4px 18px 20px 21px;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-brand-soft:#E8F0FE;
  --c-accent-soft:#FDEFE8;
  --c-brand:#1B5FD9;
  --c-brand-deep:#123F8F;
  --c-brand-100:#EAF1FD;
  --c-accent:#E2693C;
  --c-accent-deep:#C6522B;
  --c-teal:#0E8F86;
  --c-ink:#12233A;
  --c-ink-2:#3D5570;
  --c-muted:#6B7F99;
  --c-line:#E2E8F2;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,35,58,.05);
  --sh-2:0 10px 30px -14px rgba(18,35,58,.20);
  --sh-3:0 18px 44px -18px rgba(18,35,58,.28);
  --maxw:1200px;
  --gutter:24px;
  --f-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-brand);text-decoration:none;background:transparent;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--c-brand-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,h6,p{margin:0;font-family:var(--f-sans);color:inherit;}
h1{font-size:44px;line-height:1.25;font-weight:700;letter-spacing:.2px;}
h2{font-size:30px;line-height:1.35;font-weight:600;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
button{font-family:inherit;font-size:inherit;color:inherit;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(27,95,217,.30);outline-offset:2px;border-radius:4px;}

/* ============ 容器与通用结构 ============ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{padding:88px 0;}
.section--light{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section--soft{background:linear-gradient(180deg,#FFFFFF 0%,#F2F6FC 100%);}
.section-head{max-width:820px;margin-bottom:36px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.6px;
  color:var(--c-brand-deep);background:var(--c-brand-soft);
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:16px;
}
.eyebrow i{font-size:11px;color:var(--c-brand);}
.section-head h2{color:var(--c-ink);}
.section-head p{margin-top:14px;color:var(--c-ink-2);font-size:16px;max-width:780px;}
.section-head--center p{margin-left:auto;margin-right:auto;}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  min-height:44px;text-align:center;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--c-brand);color:#fff;}
.btn-primary:hover{background:var(--c-brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-accent{background:var(--c-accent-deep);color:#fff;}
.btn-accent:hover{background:#A8431F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-outline{background:#fff;border-color:var(--c-line);color:var(--c-ink);}
.btn-outline:hover{border-color:var(--c-brand);color:var(--c-brand);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;color:var(--c-brand);padding:14px 4px;min-height:44px;}
.btn-ghost:hover{color:var(--c-brand-deep);}
.btn-ghost i{transition:transform .2s ease;}
.btn-ghost:hover i{transform:translateX(4px);}
.btn-sm{padding:10px 18px;font-size:14px;min-height:38px;border-radius:9px;}
.btn-mini{
  display:inline-flex;align-items:center;justify-content:center;
  padding:6px 14px;font-size:13px;line-height:1.4;font-weight:600;
  border-radius:var(--r-pill);border:1px solid var(--c-brand);
  color:var(--c-brand);background:#fff;transition:all .2s ease;
}
.btn-mini:hover{background:var(--c-brand);color:#fff;}
.btn:disabled,.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 顶部信息条 ============ */
.top-bar-info{
  background:var(--c-brand-100);
  border-bottom:1px solid #DCE7F8;
  font-size:13px;
  color:var(--c-brand-deep);
}
.info-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;min-height:36px;padding-top:4px;padding-bottom:4px;
}
.info-left,.info-mid,.info-right{display:flex;align-items:center;gap:10px;}
.info-domain{font-weight:600;letter-spacing:.3px;}
.info-mid{color:var(--c-ink-2);}
.info-mid span{white-space:nowrap;}
.dot{width:4px;height:4px;border-radius:50%;background:#9FB6D8;display:inline-block;flex:0 0 auto;}
.info-link{color:var(--c-brand-deep);font-weight:600;}
.info-link:hover{color:var(--c-brand);}

/* ============ 主导航 ============ */
.site-header{position:relative;z-index:60;}
.main-nav{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.main-nav.is-scrolled{box-shadow:var(--sh-1);border-bottom-color:var(--c-line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-ink);}
.brand:hover{color:var(--c-brand-deep);}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;
  background:linear-gradient(140deg,var(--c-brand) 0%,var(--c-brand-deep) 100%);
  color:#fff;font-size:17px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px -6px rgba(27,95,217,.8);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-menu li a{
  position:relative;
  display:inline-flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);
}
.nav-menu li a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;
  background:var(--c-brand);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform .25s ease,background-color .25s ease;
}
.nav-menu li a:hover{color:var(--c-brand);}
.nav-menu li a:hover::after{transform:scaleX(1);background:var(--c-brand-soft);}
.nav-menu li a.active{color:var(--c-ink);font-weight:600;}
.nav-menu li a.active::after{transform:scaleX(1);height:3px;background:var(--c-brand);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink-2);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .2s ease;
}
.icon-btn:hover{color:var(--c-brand);border-color:var(--c-brand);}
.hamburger{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);
  background:#fff;border-radius:10px;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);transition:transform .25s ease,opacity .25s ease;}
.mobile-drawer{display:none;}

/* ============ 页头 ============ */
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,#EEF3FB 100%);
  border-bottom:1px solid var(--c-line);
}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-repeat:no-repeat;
  background-position:right bottom;
  background-size:cover;
  opacity:.10;
  pointer-events:none;
}
.page-hero__inner{position:relative;padding:40px 0 48px;}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--c-muted);
  padding-bottom:14px;margin-bottom:26px;
  border-bottom:1px solid var(--c-line);
}
.breadcrumb a{color:var(--c-ink-2);}
.breadcrumb a:hover{color:var(--c-brand);}
.breadcrumb .sep{color:#B7C4D6;}
.breadcrumb .current{color:var(--c-muted);}
.page-hero h1{color:var(--c-ink);}
.page-hero .lede{
  margin-top:16px;font-size:17px;color:var(--c-ink-2);max-width:820px;
}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.fact-chip{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:8px 16px;font-size:13.5px;color:var(--c-ink-2);box-shadow:var(--sh-1);
}
.fact-chip i{color:var(--c-teal);font-size:12px;}
.chip-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;
  font-size:14px;color:var(--c-ink-2);font-weight:500;
  transition:all .2s ease;
}
.chip:hover{border-color:var(--c-brand);color:var(--c-brand);}
.chip.is-active{background:var(--c-brand);border-color:var(--c-brand);color:#fff;font-weight:600;box-shadow:0 8px 18px -12px rgba(27,95,217,.9);}
.chip i{font-size:12px;}

/* ============ 场景网格 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.s-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease;
}
.s-card::before{
  content:"";display:block;height:3px;background:var(--c-brand);
}
.s-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.s-card__media{position:relative;aspect-ratio:16 / 9;background:#E6ECF5;overflow:hidden;}
.s-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.s-card:hover .s-card__media img{transform:scale(1.03);}
.s-card__badge{
  position:absolute;left:14px;top:14px;
  background:rgba(255,255,255,.94);
  color:var(--c-brand-deep);
  font-size:12.5px;font-weight:600;
  padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid #D8E4F6;
}
.s-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.s-card__body h3{font-size:18px;color:var(--c-ink);}
.s-card__body p{margin-top:10px;font-size:14.5px;color:var(--c-ink-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.s-card__meta{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--c-muted);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-brand-soft);color:var(--c-brand-deep);
  font-size:12.5px;font-weight:600;
  padding:4px 12px;border-radius:var(--r-pill);
}
.tag--teal{background:#E3F4F2;color:#0B6F68;}
.grid-more{display:flex;justify-content:center;margin-top:40px;}

/* ============ 流程步骤 ============ */
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;position:relative;
}
.step{
  position:relative;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:26px 24px;
}
.step__num{
  width:44px;height:44px;border-radius:50%;
  background:var(--c-brand-soft);color:var(--c-brand-deep);
  font-size:16px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.step h3{font-size:17px;color:var(--c-ink);}
.step p{margin-top:8px;font-size:14px;color:var(--c-ink-2);line-height:1.7;}
.step::after{
  content:"";position:absolute;top:48px;right:-16px;width:16px;height:2px;
  background:#D5E1F4;
}
.step:last-child::after{display:none;}

/* ============ 安全清单 ============ */
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 28px;}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease;
}
.check-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.check-item i{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:#E3F4F2;color:var(--c-teal);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;margin-top:4px;
}
.check-item h3{font-size:16px;color:var(--c-ink);}
.check-item p{margin-top:6px;font-size:14px;color:var(--c-ink-2);line-height:1.7;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .25s ease;
}
.faq-item:hover{box-shadow:var(--sh-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;
  transition:color .2s ease,box-shadow .2s ease;
}
.faq-q i{color:var(--c-brand);font-size:14px;transition:transform .25s ease;flex:0 0 auto;}
.faq-item.is-open .faq-q{color:var(--c-brand-deep);box-shadow:inset 3px 0 0 var(--c-brand);}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;background:#F7F9FD;}
.faq-a__inner{
  padding:18px 24px 22px 27px;
  font-size:15px;color:var(--c-ink-2);line-height:1.85;
  border-top:1px solid var(--c-line);
  border-left:3px solid var(--c-brand);
}

/* ============ 引导面板 ============ */
.cta-panel{
  background:var(--c-brand-soft);
  border-radius:var(--r-lg);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  border:1px solid #D8E4F6;
}
.cta-panel h2{font-size:26px;color:var(--c-brand-deep);}
.cta-panel p{margin-top:12px;font-size:15px;color:var(--c-ink-2);max-width:640px;}
.cta-panel .cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{background:#0F2A4D;color:#fff;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;padding-top:64px;padding-bottom:48px;
}
.brand--light{color:#fff;}
.brand--light .brand-text{color:#fff;}
.brand--light:hover{color:#fff;}
.f-brand p{
  margin-top:18px;font-size:14px;line-height:1.85;
  color:rgba(255,255,255,.70);max-width:340px;
}
.f-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.3px;}
.f-col ul li{margin-bottom:12px;}
.f-col ul li a,.f-col ul li span{
  font-size:14px;color:rgba(255,255,255,.70);line-height:1.7;
  transition:color .2s ease;
}
.f-col ul li a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0;}
.footer-bottom .container{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12.5px;color:rgba(255,255,255,.60);line-height:1.8;}

/* ============ 滚动进入动画 ============ */
.has-js .reveal{opacity:0;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease;}
.has-js .reveal.in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .container{padding:0 20px;}
  .scene-grid{gap:20px;}
}
@media (max-width:991px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .section{padding:64px 0;}
  .info-mid{display:none;}
  .nav-menu{display:none;}
  .hamburger{display:flex;}
  .mobile-drawer{
    display:block;max-height:0;overflow:hidden;
    background:#fff;border-top:1px solid var(--c-line);
    transition:max-height .3s ease;
  }
  .mobile-drawer.is-open{max-height:520px;box-shadow:var(--sh-2);}
  .mobile-drawer ul{padding:14px 24px 4px;}
  .mobile-drawer ul li a{
    display:flex;align-items:center;min-height:48px;
    font-size:15px;color:var(--c-ink-2);font-weight:500;
    border-bottom:1px solid var(--c-line);
  }
  .mobile-drawer ul li a.active{color:var(--c-brand);font-weight:600;}
  .drawer-cta{padding:16px 24px 22px;}
  .drawer-cta .btn{width:100%;}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step::after{display:none;}
  .check-list{grid-template-columns:1fr;}
  .cta-panel{flex-direction:column;align-items:flex-start;padding:32px 28px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding-top:48px;}
  .f-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  :root{--gutter:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .section{padding:56px 0;}
  .page-hero__inner{padding:28px 0 36px;}
  .scene-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .info-right .info-link{display:none;}
  .info-inner{overflow-x:auto;white-space:nowrap;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand-text{font-size:16px;}
  .nav-actions .btn-primary{display:none;}
  .cta-panel .cta-actions{width:100%;flex-direction:column;}
  .cta-panel .cta-actions .btn{width:100%;}
  .fact-chip{font-size:13px;padding:7px 13px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .has-js .reveal{opacity:1;transform:none;}
}