/* roulang page: index */
/* ============================================================
   1. 设计变量
   ============================================================ */
:root{
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;

  --bg-page:#F6F8FC;
  --bg-soft:#EEF3FA;
  --surface:#FFFFFF;

  --line:#E4EAF2;
  --line-strong:#D3DCE8;

  --brand-700:#0E4FA8;
  --brand-600:#1668D6;
  --brand-500:#2E86F0;
  --brand-100:#E4EFFE;
  --brand-50:#F3F8FF;

  --accent-600:#0E9C8D;
  --accent-100:#E2F6F2;

  --warn-500:#F2683C;

  --ink-900:#0D1B2A;
  --ink-700:#2B3B4E;
  --ink-500:#5C6E82;
  --ink-300:#98A7B7;

  --shadow-1:0 1px 2px rgba(13,27,42,.06);
  --shadow-2:0 10px 24px -12px rgba(13,27,42,.14);
  --shadow-3:0 28px 56px -24px rgba(13,27,42,.22);

  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;

  --ease:cubic-bezier(.32,.72,0,1);

  /* Bootstrap 覆盖 */
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:var(--ink-700);
  --bs-body-bg:var(--bg-page);
  --bs-primary:#1668D6;
  --bs-primary-rgb:22,104,214;
  --bs-border-color:#E4EAF2;
  --bs-border-radius:10px;
  --bs-border-radius-sm:6px;
  --bs-border-radius-lg:14px;
  --bs-link-color:#1668D6;
  --bs-link-hover-color:#0E4FA8;
  --bs-font-sans-serif:var(--font-sans);
  --bs-emphasis-color:#0D1B2A;
  --bs-body-line-height:1.8;
}

/* ============================================================
   2. 基础 reset
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:0;line-height:1.3;}
p{margin:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-700);}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
figure{margin:0;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

/* ============================================================
   3. 容器
   ============================================================ */
.container-xl{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.container-wide{width:100%;max-width:1320px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ============================================================
   4. 按钮 / 标签 / 徽章
   ============================================================ */
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-sm);
  background:var(--brand-600);border:1px solid var(--brand-600);color:#fff;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-brand:active{transform:translateY(0);box-shadow:none;}
.btn-brand:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-sm);
  background:#fff;border:1px solid var(--line-strong);color:var(--ink-900);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost:active{transform:translateY(0);box-shadow:none;}

.btn-lg{height:48px;padding:0 24px;font-size:16px;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}

.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-600);
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
}
.link-more::after{content:"→";text-decoration:none;transition:transform .2s var(--ease);}
.link-more:hover{color:var(--brand-700);}
.link-more:hover::after{transform:translateX(3px);}

.badge{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1;}
.badge-brand{background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-100);}
.badge-accent{background:var(--accent-100);color:var(--accent-600);border:1px solid rgba(14,156,141,.22);}
.badge-warn{background:var(--warn-500);color:#fff;border:1px solid var(--warn-500);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.02em;
  margin-bottom:14px;
}
.eyebrow i{display:inline-block;width:4px;height:14px;border-radius:2px;background:var(--brand-600);}

/* ============================================================
   5. 顶部导航
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--shadow-1);border-bottom-color:var(--line);}
.nav-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  height:68px;transition:height .24s var(--ease);
}
.site-header.is-stuck .nav-bar{height:60px;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0;}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:var(--r-sm);
  background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-text{
  display:inline-flex;align-items:center;gap:8px;
  font-size:19px;font-weight:700;color:var(--ink-900);line-height:1.2;white-space:nowrap;
}
.brand-tag{
  display:inline-flex;align-items:center;height:20px;padding:0 8px;border-radius:var(--r-pill);
  background:var(--brand-50);border:1px solid var(--brand-100);color:var(--brand-600);
  font-size:11px;font-weight:600;letter-spacing:.02em;
}

.nav-main{display:flex;align-items:center;gap:2px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-block;
  padding:10px 12px;font-size:15px;font-weight:500;color:var(--ink-700);border-radius:var(--r-xs);
  transition:color .2s var(--ease);
}
.nav-link:hover{color:var(--brand-600);}
.nav-link.is-active{color:var(--brand-600);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:60%;height:2px;border-radius:2px;background:var(--brand-600);
}

.nav-tools{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.cmd-search{
  position:relative;display:flex;align-items:center;
  width:250px;height:40px;padding:0 10px 0 12px;
  background:#F2F5F9;border:1px solid transparent;border-radius:var(--r-sm);
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cmd-search svg{flex:0 0 auto;color:var(--ink-500);}
.cmd-search input{
  flex:1 1 auto;min-width:0;height:100%;padding:0 8px;
  border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink-900);
}
.cmd-search input::placeholder{color:var(--ink-300);}
.cmd-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 4px rgba(22,104,214,.12);}
.cmd-search kbd{
  flex:0 0 auto;font-family:inherit;font-size:11px;line-height:1.5;
  color:var(--ink-500);background:#fff;border:1px solid var(--line-strong);
  border-radius:5px;padding:1px 5px;
}
.cmd-search--block{width:100%;}

.nav-quick{font-size:14px;font-weight:500;color:var(--ink-700);white-space:nowrap;}
.nav-quick:hover{color:var(--brand-600);}

.nav-burger{
  width:44px;height:44px;flex:0 0 auto;padding:0;
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);cursor:pointer;
  transition:border-color .2s var(--ease);
}
.nav-burger:hover{border-color:var(--brand-500);}
.nav-burger span{display:block;width:18px;height:1.5px;border-radius:2px;background:var(--ink-900);}

.mobile-nav{width:min(340px,88vw);background:#fff;border:0;}
.mobile-nav .offcanvas-header{padding:16px 20px;border-bottom:1px solid var(--line);}
.mobile-links{display:flex;flex-direction:column;gap:4px;margin:20px 0;}
.mobile-links a{padding:12px 14px;border-radius:var(--r-sm);font-size:16px;font-weight:500;color:var(--ink-700);}
.mobile-links a:hover,.mobile-links a.is-active{background:var(--brand-50);color:var(--brand-600);}
.mobile-nav .offcanvas-body{padding:0 20px 24px;display:flex;flex-direction:column;}
.mobile-cta{margin-top:auto;padding-top:18px;}

/* ============================================================
   6. 首屏 Hero
   ============================================================ */
.hero{
  position:relative;overflow:hidden;
  padding:64px 0 76px;
  background-color:#F6F8FC;
  background-image:linear-gradient(100deg,rgba(246,248,252,.97) 0%,rgba(246,248,252,.9) 40%,rgba(243,248,255,.66) 72%,rgba(243,248,255,.42) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center right;
  background-repeat:no-repeat;
}
@media (min-width:992px){
  .hero{min-height:560px;display:flex;align-items:center;padding:72px 0;}
  .hero>.container-xl{width:100%;}
}
.hero-title{font-size:44px;line-height:1.25;font-weight:700;max-width:620px;}
.hero-sub{margin-top:20px;max-width:600px;font-size:16px;line-height:1.85;color:var(--ink-700);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-note{margin-top:16px;font-size:12px;line-height:1.6;color:var(--ink-500);}

.hero-visual{
  position:relative;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--shadow-3);padding:14px;
}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:16px;background:var(--bg-soft);
}
.hero-visual-badge{
  position:absolute;top:26px;right:26px;z-index:2;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  background:var(--warn-500);color:#fff;font-size:12px;font-weight:600;
  border-radius:var(--r-pill);box-shadow:0 6px 16px -8px rgba(242,104,60,.9);
}
.hero-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;
  margin-top:14px;padding:14px 8px 6px;border-top:1px solid var(--line);
}
.hero-metrics div{text-align:center;}
.hero-metrics strong{display:block;font-size:18px;font-weight:700;color:var(--brand-600);line-height:1.3;}
.hero-metrics span{display:block;font-size:12px;color:var(--ink-500);line-height:1.6;}

/* ============================================================
   7. 信任指标条
   ============================================================ */
.trust-bar{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.trust-list{display:grid;grid-template-columns:repeat(4,1fr);}
.trust-list li{
  padding:26px 20px;text-align:center;
  border-right:1px solid var(--line);
}
.trust-list li:last-child{border-right:0;}
.trust-list strong{display:block;font-size:24px;font-weight:700;color:var(--brand-600);line-height:1.3;letter-spacing:-.01em;}
.trust-list span{display:block;margin-top:4px;font-size:13px;color:var(--ink-500);}

/* ============================================================
   8. 通用板块
   ============================================================ */
.section{padding:88px 0;}
.section--soft{background:var(--bg-soft);}
.section--tight{padding:56px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{font-size:32px;line-height:1.3;}
.section-head p{margin-top:12px;font-size:15px;color:var(--ink-500);}
.section-head--row{
  max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
}
.section-head--row .link-more{margin-bottom:4px;}

/* 交错图文区 */
.value-row + .value-row{margin-top:88px;}
.value-copy p{margin-top:14px;font-size:15.5px;line-height:1.9;color:var(--ink-700);}
.value-copy h3{margin-top:4px;font-size:26px;line-height:1.35;}
.value-copy .link-more{margin-top:22px;}

.media-frame{
  border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-soft);box-shadow:var(--shadow-1);
}
.media-frame img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .5s var(--ease);}
.media-frame:hover img{transform:scale(1.02);}

.bento{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start;}
.bento .media-frame:last-child{margin-top:30px;}
.bento .media-frame img{aspect-ratio:4/5;}

.value-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.value-list li{
  position:relative;padding-left:20px;font-size:15px;line-height:1.8;color:var(--ink-700);
}
.value-list li::before{
  content:"";position:absolute;left:0;top:12px;
  width:7px;height:7px;border-radius:2px;background:var(--brand-500);
}

/* ============================================================
   9. 功能截图轮播
   ============================================================ */
.shot-carousel{position:relative;}
.shot-carousel .carousel-inner{border-radius:var(--r-lg);}
.shot-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-2);padding:14px;
}
.shot-card img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:calc(var(--r-lg) - 6px);background:var(--bg-soft);
}
.shot-caption{margin-top:14px;padding:0 4px 4px;font-size:14px;color:var(--ink-500);}
.shot-carousel .carousel-indicators{
  position:static;margin:22px 0 0;gap:8px;
}
.shot-carousel .carousel-indicators [data-bs-target]{
  width:10px;height:4px;margin:0;border:0;border-radius:2px;
  background:var(--line-strong);opacity:1;
  transition:width .24s var(--ease),background .24s var(--ease);
}
.shot-carousel .carousel-indicators .active{width:24px;background:var(--brand-600);}
.shot-nav{
  position:absolute;top:calc(50% - 34px);transform:translateY(-50%);z-index:3;
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line-strong);border-radius:50%;
  color:var(--ink-900);cursor:pointer;box-shadow:var(--shadow-2);
  transition:border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.shot-nav:hover{border-color:var(--brand-500);color:var(--brand-600);}
.shot-nav--prev{left:-22px;}
.shot-nav--next{right:-22px;}
@media (max-width:1199px){
  .shot-nav--prev{left:6px;}
  .shot-nav--next{right:6px;}
}

/* ============================================================
   10. 系统要求规格卡
   ============================================================ */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);padding:26px;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.spec-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.spec-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
.spec-head h3{font-size:19px;font-weight:600;}
.spec-list li{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:11px 0;font-size:14px;
  border-bottom:1px dashed var(--line);
}
.spec-list li:last-child{border-bottom:0;}
.spec-list span{flex:0 0 auto;color:var(--ink-500);font-size:14px;}
.spec-list strong{flex:1 1 auto;text-align:right;font-weight:600;color:var(--ink-900);font-size:15px;}

/* ============================================================
   11. 评价墙
   ============================================================ */
.review-wall{columns:3;column-gap:22px;}
.review-card{
  break-inside:avoid;-webkit-column-break-inside:avoid;
  display:block;margin-bottom:22px;padding:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.review-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.review-stars{font-size:13px;letter-spacing:2px;color:var(--warn-500);line-height:1;margin-bottom:12px;}
.review-card p{font-size:14.5px;line-height:1.8;color:var(--ink-700);}
.review-author{display:flex;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);}
.review-avatar{
  width:34px;height:34px;flex:0 0 auto;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-700);font-size:14px;font-weight:600;
}
.review-author strong{display:block;font-size:14px;font-weight:600;color:var(--ink-900);line-height:1.4;}
.review-author em{display:block;font-style:normal;font-size:12px;color:var(--ink-500);line-height:1.5;}

/* ============================================================
   12. 下载区
   ============================================================ */
.download-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--shadow-3);padding:40px;
}
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.dl-btn{
  display:flex;align-items:center;gap:12px;
  min-height:64px;padding:12px 16px;
  background:#fff;border:1px solid var(--line-strong);border-radius:var(--r-md);
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.dl-btn:hover{border-color:var(--brand-500);background:var(--brand-50);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.dl-btn.is-primary{
  background:var(--brand-600);border-color:var(--brand-600);
  padding:16px 18px;box-shadow:0 12px 26px -14px rgba(22,104,214,.85);
}
.dl-btn.is-primary:hover{background:var(--brand-700);border-color:var(--brand-700);}
.dl-icon{
  width:38px;height:38px;flex:0 0 auto;border-radius:var(--r-sm);
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600);
}
.dl-btn.is-primary .dl-icon{background:rgba(255,255,255,.18);color:#fff;}
.dl-text{min-width:0;}
.dl-text strong{display:block;font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.4;white-space:nowrap;}
.dl-text em{display:block;font-style:normal;font-size:12px;color:var(--ink-500);line-height:1.5;white-space:nowrap;}
.dl-btn.is-primary .dl-text strong{color:#fff;}
.dl-btn.is-primary .dl-text em{color:rgba(255,255,255,.82);}
.download-meta{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:14px;line-height:1.9;color:var(--ink-500);}

/* ============================================================
   13. 资讯卡片
   ============================================================ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:var(--brand-100);}
.news-link{display:block;height:100%;color:inherit;}
.news-link:hover{color:inherit;}
.news-cover{background:var(--bg-soft);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-body{padding:20px 22px 22px;}
.news-title{
  margin-top:12px;font-size:17px;font-weight:600;line-height:1.55;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s var(--ease);
}
.news-card:hover .news-title{color:var(--brand-600);}
.news-summary{
  margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:14px;
  border-top:1px solid var(--line);font-size:13px;color:var(--ink-500);
}
.news-empty{
  grid-column:1 / -1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:56px 24px;text-align:center;
  background:var(--bg-soft);border:1px dashed var(--line-strong);border-radius:var(--r-lg);
}
.news-empty svg{color:var(--ink-300);}
.news-empty p{font-size:14px;color:var(--ink-500);}

/* ============================================================
   14. FAQ
   ============================================================ */
.faq-accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-accordion .accordion-item:hover{border-color:var(--line-strong);box-shadow:var(--shadow-1);}
.faq-accordion .accordion-button{
  position:relative;width:100%;padding:18px 24px 18px 52px;
  background:transparent;border:0;box-shadow:none;
  font-size:16px;font-weight:600;color:var(--ink-900);text-align:left;line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-accordion .accordion-button::before{
  content:"Q";position:absolute;left:24px;top:50%;transform:translateY(-50%);
  width:20px;height:20px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-700);font-size:11px;font-weight:700;
}
.faq-accordion .accordion-button::after{
  content:"";position:absolute;right:24px;top:50%;
  width:9px;height:9px;margin-top:-6px;
  border-right:1.5px solid var(--ink-500);border-bottom:1.5px solid var(--ink-500);
  transform:rotate(45deg);transition:transform .24s var(--ease);
  background:transparent;
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand-700);background:var(--brand-50);}
.faq-accordion .accordion-button:not(.collapsed)::before{background:var(--brand-600);color:#fff;}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);margin-top:-2px;border-color:var(--brand-600);}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand-500);outline-offset:-2px;}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--brand-600);}
.faq-accordion .accordion-body{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-700);}

/* ============================================================
   15. 尾部 CTA
   ============================================================ */
.final-cta{
  background:var(--brand-50);border-top:1px solid var(--line);
  padding:76px 0;text-align:center;
}
.final-cta h2{font-size:30px;line-height:1.35;max-width:760px;margin:0 auto;}
.final-cta p{margin:16px auto 0;max-width:640px;font-size:15px;line-height:1.9;color:var(--ink-500);}
.final-cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:30px;}

/* ============================================================
   16. 页脚
   ============================================================ */
.site-footer{background:var(--ink-900);color:#C6D2E0;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand-text{color:#fff;font-size:18px;}
.footer-brand .brand-tag{background:rgba(46,134,240,.18);border-color:rgba(46,134,240,.35);color:#8FC0FF;}
.footer-brand .brand-mark{background:var(--brand-600);}
.footer-brand p{margin-top:16px;max-width:330px;font-size:14px;line-height:1.9;color:#9FB0C4;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;line-height:1.5;}
.footer-col a{display:block;padding:5px 0;font-size:14px;color:#9FB0C4;}
.footer-col a:hover{color:var(--brand-500);}
.footer-contact{margin-top:16px;font-size:13px;line-height:1.9;color:#7E92A8;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  font-size:13px;color:#8397AC;
}
.footer-bottom a{color:#8397AC;}
.footer-bottom a:hover{color:var(--brand-500);}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:20px;}

/* ============================================================
   17. 返回顶部
   ============================================================ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:44px;height:44px;padding:0;border:0;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-600);color:#fff;cursor:pointer;box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .2s var(--ease),visibility .24s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-700);}

/* ============================================================
   18. 入场动效
   ============================================================ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* ============================================================
   19. 响应式
   ============================================================ */
@media (max-width:1199.98px){
  .container-xl,.container-wide{padding-left:20px;padding-right:20px;}
  .cmd-search{width:210px;}
  .hero-title{font-size:38px;}
  .spec-grid{gap:20px;}
  .download-grid{grid-template-columns:repeat(2,1fr);}
}

@media (max-width:991.98px){
  .section{padding:64px 0;}
  .section--tight{padding:44px 0;}
  .hero{padding:48px 0 56px;}
  .hero-title{font-size:32px;line-height:1.3;}
  .hero-visual{margin-top:36px;}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{flex:1 1 auto;}
  .section-head h2{font-size:26px;}
  .section-head{margin-bottom:32px;}
  .value-row + .value-row{margin-top:64px;}
  .value-copy h3{font-size:22px;}
  .review-wall{columns:2;column-gap:18px;}
  .review-card{margin-bottom:18px;}
  .spec-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .download-panel{padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .final-cta{padding:60px 0;}
  .final-cta h2{font-size:24px;}
  .final-cta-actions .btn-brand,.final-cta-actions .btn-ghost{flex:1 1 auto;justify-content:center;}
}

@media (max-width:767.98px){
  .section{padding:52px 0;}
  .section--tight{padding:36px 0;}
  .section-head h2{font-size:23px;}
  .hero-title{font-size:30px;}
  .hero-sub{font-size:15px;}
  .trust-list{grid-template-columns:1fr 1fr;}
  .trust-list li{padding:20px 12px;border-bottom:1px solid var(--line);}
  .trust-list li:nth-child(2n){border-right:0;}
  .trust-list li:nth-child(n+3){border-bottom:0;}
  .trust-list strong{font-size:21px;}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px;}
  .news-grid{grid-template-columns:1fr;}
  .download-grid{grid-template-columns:1fr;}
  .dl-btn{width:100%;}
  .download-panel{padding:22px;}
  .review-wall{columns:1;}
  .spec-card{padding:20px;}
  .faq-accordion .accordion-button{padding:16px 20px 16px 46px;font-size:15px;}
  .faq-accordion .accordion-button::before{left:18px;}
  .faq-accordion .accordion-button::after{right:20px;}
  .faq-accordion .accordion-body{padding:0 20px 18px;font-size:14.5px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:16px;}
  .bento{grid-template-columns:1fr;}
  .bento .media-frame:last-child{margin-top:0;}
  .bento .media-frame img{aspect-ratio:16/10;}
}

@media (max-width:479.98px){
  .container-xl,.container-wide{padding-left:16px;padding-right:16px;}
  .brand-text{font-size:16px;gap:6px;}
  .brand-tag{display:none;}
  .hero-title{font-size:26px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%;}
  .final-cta-actions{flex-direction:column;align-items:stretch;}
  .download-meta{font-size:13px;}
  .news-body{padding:18px;}
}

/* roulang page: article */
:root{
  --bs-primary:#1668D6;
  --bs-primary-rgb:22,104,214;
  --bs-body-font-family:"Inter","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --bs-body-color:#2B3B4E;
  --bs-body-bg:#F6F8FC;
  --bs-border-color:#E4EAF2;
  --bs-border-radius:14px;
  --bs-link-color:#1668D6;
  --bs-link-hover-color:#0E4FA8;
  --bs-font-sans-serif:"Inter","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bg-page:#F6F8FC;
  --bg-soft:#EEF3FA;
  --surface:#FFFFFF;
  --line:#E4EAF2;
  --line-strong:#D3DCE8;
  --brand-700:#0E4FA8;
  --brand-600:#1668D6;
  --brand-500:#2E86F0;
  --brand-100:#E4EFFE;
  --brand-50:#F3F8FF;
  --accent-600:#0E9C8D;
  --accent-100:#E2F6F2;
  --warn-500:#F2683C;
  --ink-900:#0D1B2A;
  --ink-700:#2B3B4E;
  --ink-500:#5C6E82;
  --ink-300:#98A7B7;
  --shadow-1:0 1px 2px rgba(13,27,42,.06);
  --shadow-2:0 10px 24px -12px rgba(13,27,42,.14);
  --shadow-3:0 28px 56px -24px rgba(13,27,42,.22);
  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;
  --ease:cubic-bezier(.32,.72,0,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-page);
  color:var(--ink-700);
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
}
img{max-width:100%;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{color:var(--ink-900);margin:0;font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0}
.container-xl{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:88px 0}
.section-soft{background:var(--bg-soft)}
.section-head{margin-bottom:36px}
.section-head h2{font-size:32px;line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--ink-500);font-size:15px;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-50);border:1px solid var(--brand-100);
  border-radius:var(--r-pill);padding:4px 12px;margin-bottom:14px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-600)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;font-size:15px;font-weight:600;
  border-radius:var(--r-sm);border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{
  background:var(--brand-600);border-color:var(--brand-600);color:#fff;
  --bs-btn-bg:var(--brand-600);--bs-btn-border-color:var(--brand-600);
  --bs-btn-hover-bg:var(--brand-700);--bs-btn-hover-border-color:var(--brand-700);
  --bs-btn-active-bg:var(--brand-700);--bs-btn-active-border-color:var(--brand-700);
  --bs-btn-color:#fff;--bs-btn-hover-color:#fff;--bs-btn-active-color:#fff;
}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{
  background:#fff;border-color:var(--line-strong);color:var(--ink-900);
}
.btn-outline:hover{background:var(--brand-50);border-color:var(--brand-500);color:var(--brand-700)}
.btn-lg{height:48px;padding:0 24px;font-size:16px}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--brand-500);outline-offset:2px;
}
.badge-soft{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-100);
}
.badge-accent{background:var(--accent-100);color:var(--accent-600);border-color:var(--accent-100)}
.badge-warn{background:var(--warn-500);color:#fff;border-color:var(--warn-500)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  backdrop-filter:saturate(140%) blur(6px);
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;height:68px;transition:height .2s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:var(--r-sm);
  background:var(--brand-600);color:#fff;flex:0 0 auto;
}
.brand-text{font-size:18px;font-weight:700;color:var(--ink-900);line-height:1.2;display:flex;flex-direction:column}
.brand-text small{font-size:11px;font-weight:500;color:var(--brand-600);letter-spacing:0}
.nav-main{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-main .nav-link{
  position:relative;padding:6px 12px;font-size:15px;color:var(--ink-700);
  border-radius:var(--r-xs);transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-main .nav-link:hover{color:var(--brand-600);background:var(--brand-50)}
.nav-main .nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-main .nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);
  width:60%;height:2px;border-radius:2px;background:var(--brand-600);
}
.header-tools{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.command-search{
  position:relative;display:flex;align-items:center;gap:8px;
  width:250px;height:40px;padding:0 10px;background:#F2F5F9;
  border:1px solid transparent;border-radius:var(--r-sm);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.command-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 4px rgba(22,104,214,.12)}
.command-search svg{color:var(--ink-500);flex:0 0 auto}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink-700);font-family:inherit;
}
.command-search input::placeholder{color:var(--ink-300)}
.kbd{
  flex:0 0 auto;font-size:11px;color:var(--ink-500);background:#fff;
  border:1px solid var(--line);border-radius:var(--r-xs);padding:1px 6px;line-height:1.6;
}
.nav-quick{font-size:14px;color:var(--ink-700);font-weight:500}
.nav-quick:hover{color:var(--brand-600)}
.btn-cta{height:40px;padding:0 16px;font-size:14px}
.nav-toggle{
  margin-left:auto;width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line-strong);border-radius:var(--r-sm);color:var(--ink-900);
}
.offcanvas{background:#fff}
.offcanvas-header{border-bottom:1px solid var(--line)}
.offcanvas-title{font-size:16px;font-weight:700;color:var(--ink-900)}
.mobile-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.mobile-nav a{
  display:block;padding:12px 14px;border-radius:var(--r-sm);font-size:15px;
  color:var(--ink-700);border:1px solid var(--line);background:#fff;
}
.mobile-nav a.is-active{color:var(--brand-600);border-color:var(--brand-100);background:var(--brand-50);font-weight:600}
.mobile-search{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);padding:0 14px;font-size:15px;outline:none;background:#F2F5F9;font-family:inherit}
.mobile-search:focus{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 4px rgba(22,104,214,.12)}

/* ---------- breadcrumb ---------- */
.crumb-bar{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:14px 0}
.breadcrumb{margin:0;font-size:14px;color:var(--ink-500);display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-900);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article head ---------- */
.article-hero{
  background:
    linear-gradient(90deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.86) 55%,rgba(243,248,255,.74) 100%),
    url("/assets/images/backpic/back-2.png") right center/cover no-repeat;
  border-bottom:1px solid var(--line);
  padding:52px 0 44px;
}
.article-hero h1{font-size:clamp(26px,3.2vw,36px);line-height:1.35;margin-bottom:16px;max-width:820px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--ink-500)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300);display:inline-block}
.lead-block{
  margin-top:22px;background:var(--brand-50);border-left:3px solid var(--brand-600);
  border-radius:var(--r-md);padding:16px 20px;font-size:16px;line-height:1.8;color:var(--ink-700);max-width:820px;
}

/* ---------- article body ---------- */
.article-wrap{padding:56px 0 80px}
.article-body{max-width:760px;font-size:17px;line-height:1.9;color:var(--ink-700)}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;margin:40px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.35em;width:4px;height:20px;border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:18px;line-height:1.6;margin:28px 0 12px}
.article-body p{margin:0 0 1.2em}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-700)}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.2em}
.article-body li{margin-bottom:.5em}
.article-body ul>li::marker{color:var(--brand-500)}
.article-body ol>li::marker{color:var(--brand-500);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--brand-50);
  border-left:3px solid var(--brand-600);border-radius:var(--r-md);color:var(--ink-700);
}
.article-body img{border-radius:var(--r-md);display:block;margin:24px auto;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;background:#fff;border-radius:var(--r-md);overflow:hidden}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--bg-soft);color:var(--ink-900);font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state svg{color:var(--ink-300);margin-bottom:14px}
.empty-state p{font-size:15px;color:var(--ink-500);margin-bottom:20px}

/* ---------- tags / postnav ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:36px 0 0}
.tag-row a{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;background:#fff;border:1px solid var(--line);color:var(--ink-700);
}
.tag-row a:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:32px}
.post-nav a{
  display:block;padding:18px 20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--shadow-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-nav a:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.post-nav .pn-label{font-size:12px;color:var(--ink-500);display:block;margin-bottom:6px}
.post-nav .pn-title{font-size:15px;font-weight:600;color:var(--ink-900);display:block}
.post-nav a:hover .pn-title{color:var(--brand-600)}
.back-row{margin-top:28px}

/* ---------- sidebar ---------- */
.side-sticky{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:16px;margin-bottom:14px}
.side-card p{font-size:14px;color:var(--ink-500);margin:0 0 14px}
.side-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}
.side-list a{
  display:block;padding:9px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--ink-700);
  border-left:3px solid transparent;transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.side-list a:hover,.side-list a.is-active{background:var(--brand-50);color:var(--brand-700);border-left-color:var(--brand-600)}
.side-rel{display:flex;flex-direction:column;gap:14px}
.side-rel a{display:flex;gap:12px;align-items:flex-start}
.side-rel img{width:64px;height:48px;object-fit:cover;border-radius:var(--r-sm);flex:0 0 auto;background:var(--bg-soft)}
.side-rel .rel-title{font-size:14px;font-weight:600;color:var(--ink-900);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-rel .rel-meta{font-size:12px;color:var(--ink-500);margin-top:4px}
.side-rel a:hover .rel-title{color:var(--brand-600)}
.side-dl{background:var(--brand-50);border-color:var(--brand-100)}
.side-dl .btn{width:100%;margin-bottom:10px}
.side-dl .note{font-size:13px;color:var(--ink-500);margin:0}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.card-cover{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft)}
.card-cover img{width:100%;height:100%;object-fit:cover;display:block}
.card-body{padding:22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card:hover .card-title{color:var(--brand-600)}
.card-text{font-size:14px;color:var(--ink-500);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);border-top:1px solid var(--line);padding-top:12px}
.card-link{display:block;color:inherit;text-decoration:none}
.card-link:hover{color:inherit}

/* ---------- cta ---------- */
.cta-band{background:var(--brand-50);border-top:1px solid var(--line);padding:72px 0;text-align:center}
.cta-band h2{font-size:30px;margin-bottom:12px}
.cta-band p{color:var(--ink-500);font-size:15px;max-width:640px;margin:0 auto 26px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#fff;padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.site-footer .brand-text{color:#fff}
.site-footer .brand-text small{color:var(--brand-500)}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.62);line-height:1.8;margin:16px 0 0;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.66);margin-bottom:10px;line-height:1.6}
.footer-col a:hover{color:var(--brand-500)}
.footer-contact{font-size:13px;color:rgba(255,255,255,.5);line-height:1.7;margin:14px 0 0}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom-links a{color:rgba(255,255,255,.55)}
.footer-bottom-links a:hover{color:var(--brand-500)}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--brand-600);color:#fff;border:0;display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),background-color .2s var(--ease);
  z-index:1040;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-700)}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .command-search{width:200px}
}
@media (max-width:991.98px){
  .header-inner{height:64px}
  .nav-main{display:none}
  .side-sticky{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767.98px){
  .container-xl{padding-left:16px;padding-right:16px}
  .section{padding:52px 0}
  .section-head h2{font-size:24px}
  .article-hero{padding:36px 0 32px}
  .article-wrap{padding:36px 0 56px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:32px}
  .post-nav{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:52px 0}
  .cta-band h2{font-size:23px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575.98px){
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .btn{width:100%}
  .cta-actions .btn{width:100%}
  .breadcrumb .current{max-width:100%;white-space:normal}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg-page:#F6F8FC;
  --bg-soft:#EEF3FA;
  --surface:#FFFFFF;
  --line:#E4EAF2;
  --line-strong:#D3DCE8;

  --brand-700:#0E4FA8;
  --brand-600:#1668D6;
  --brand-500:#2E86F0;
  --brand-100:#E4EFFE;
  --brand-50:#F3F8FF;

  --accent-600:#0E9C8D;
  --accent-100:#E2F6F2;

  --warn-500:#F2683C;

  --ink-900:#0D1B2A;
  --ink-700:#2B3B4E;
  --ink-500:#5C6E82;
  --ink-300:#98A7B7;

  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;

  --shadow-1:0 1px 2px rgba(13,27,42,.06);
  --shadow-2:0 10px 24px -12px rgba(13,27,42,.14);
  --shadow-3:0 28px 56px -24px rgba(13,27,42,.22);

  --sp-section:88px;
  --sp-section-md:64px;
  --sp-section-sm:52px;

  --font-sans:"Inter","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ease:cubic-bezier(.32,.72,0,1);

  --bs-primary:#1668D6;
  --bs-primary-rgb:22,104,214;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:#2B3B4E;
  --bs-body-bg:#F6F8FC;
  --bs-border-color:#E4EAF2;
  --bs-border-radius:10px;
  --bs-link-color:#1668D6;
  --bs-link-hover-color:#0E4FA8;
  --bs-font-sans-serif:var(--font-sans);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}

.container-xl{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1200px){
  .container-xl{max-width:1200px}
}

/* ---------- 按钮 ---------- */
.btn{
  --btn-h:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:var(--btn-h);
  padding:0 20px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-lg{--btn-h:48px;font-size:16px;padding:0 24px}
.btn-primary{
  background:var(--brand-600);
  color:#fff;
  border-color:var(--brand-600);
  box-shadow:var(--shadow-1);
}
.btn-primary:hover,.btn-primary:focus{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-2);
}
.btn-primary:active{transform:translateY(0);background:var(--brand-700)}
.btn-ghost{
  background:var(--surface);
  color:var(--ink-900);
  border-color:var(--line-strong);
}
.btn-ghost:hover{
  background:var(--brand-50);
  border-color:var(--brand-500);
  color:var(--brand-700);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.link-arrow:hover{border-bottom-color:var(--brand-600);color:var(--brand-700)}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- 徽章 / 标签 ---------- */
.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:22px;
  padding:0 10px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
}
.pill-brand{background:var(--brand-50);color:var(--brand-700)}
.pill-brand-solid{background:var(--brand-100);color:var(--brand-700)}
.pill-accent{background:var(--accent-100);color:var(--accent-600)}
.pill-warn{background:var(--warn-500);color:#fff}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-700);
  letter-spacing:0;
}
.eyebrow::before{
  content:"";
  width:4px;
  height:14px;
  border-radius:2px;
  background:var(--brand-600);
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:68px;
  transition:height .2s var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:var(--r-sm);
  background:var(--brand-100);
  color:var(--brand-700);
}
.brand-text{
  font-size:19px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-text em{
  font-style:normal;
  color:var(--brand-600);
}
.nav-main{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:8px;
}
.nav-main .nav-link{
  position:relative;
  padding:4px 0;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  background:none;
}
.nav-main .nav-link:hover{color:var(--brand-600)}
.nav-main .nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-main .nav-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  transform:translateX(-50%);
  width:60%;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.cmd-search{
  position:relative;
  display:flex;
  align-items:center;
  width:256px;
  height:40px;
  border-radius:var(--r-sm);
  background:#F2F5F9;
  border:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cmd-search svg{position:absolute;left:12px;color:var(--ink-300)}
.cmd-search input{
  flex:1;
  height:100%;
  border:0;
  background:transparent;
  padding:0 46px 0 38px;
  font-size:14px;
  color:var(--ink-900);
  outline:none;
}
.cmd-search input::placeholder{color:var(--ink-300)}
.cmd-search .kbd{
  position:absolute;
  right:10px;
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 7px;
  border-radius:var(--r-xs);
  border:1px solid var(--line-strong);
  background:#fff;
  font-size:11px;
  font-weight:600;
  color:var(--ink-500);
}
.cmd-search:focus-within{
  background:#fff;
  border-color:var(--brand-600);
  box-shadow:0 0 0 4px rgba(22,104,214,.12);
}
.header-quick{
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
}
.header-quick:hover{color:var(--brand-600)}
.btn-header{--btn-h:40px;font-size:14px;padding:0 16px;white-space:nowrap}
.hamburger{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-900);
}
.hamburger:hover{border-color:var(--brand-500);color:var(--brand-600)}

.offcanvas{background:#fff}
.offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:8px}
.drawer-link{
  display:block;
  padding:12px 14px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  background:var(--bg-page);
}
.drawer-link:hover{background:var(--brand-50);color:var(--brand-700)}
.drawer-link.is-active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.drawer-search{
  display:flex;
  align-items:center;
  height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:#F2F5F9;
  padding:0 14px;
  gap:10px;
}
.drawer-search input{border:0;background:transparent;outline:none;flex:1;font-size:14px;color:var(--ink-900)}
.drawer-search input::placeholder{color:var(--ink-300)}
.drawer-cta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}

/* ---------- 面包屑 ---------- */
.breadcrumb-nav{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:14px;
  color:var(--ink-500);
}
.breadcrumb-nav a{color:var(--ink-500)}
.breadcrumb-nav a:hover{color:var(--brand-600)}
.breadcrumb-nav .sep{color:var(--ink-300)}
.breadcrumb-nav .current{color:var(--ink-900);font-weight:600}

/* ---------- 内页 Hero ---------- */
.hero-cat{
  position:relative;
  padding:40px 0 44px;
  background:var(--bg-soft);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-cat-bg{
  position:absolute;
  inset:0;
  background-repeat:no-repeat;
  background-position:center right;
  background-size:cover;
  opacity:.28;
  pointer-events:none;
}
.hero-cat::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(238,243,250,.96) 0%,rgba(238,243,250,.86) 46%,rgba(243,248,255,.55) 100%);
  pointer-events:none;
}
.hero-cat-inner{position:relative;z-index:2}
.hero-cat-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:40px;
  margin-top:24px;
}
.hero-cat-copy{max-width:640px}
.hero-cat h1{
  margin-top:14px;
  font-size:38px;
  line-height:1.28;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.hero-cat-copy p{
  margin-top:16px;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-500);
}
.hero-cat-cta{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:10px;
  flex:0 0 auto;
}
.hero-note{
  font-size:12px;
  color:var(--ink-500);
  letter-spacing:.01em;
}

/* ---------- 板块通用 ---------- */
.section{padding:var(--sp-section) 0}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:720px}
.section-head h2{
  margin-top:14px;
  font-size:32px;
  line-height:1.3;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.section-head p{
  margin-top:14px;
  font-size:15px;
  color:var(--ink-500);
}
.section-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:40px;
}

/* ---------- 能力矩阵 ---------- */
.matrix-layout{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:32px;
  align-items:start;
}
.anchor-nav{
  position:sticky;
  top:96px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  padding:18px 16px;
}
.anchor-title{
  font-size:13px;
  font-weight:600;
  color:var(--ink-500);
  padding:0 8px 10px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.anchor-link{
  display:block;
  position:relative;
  padding:10px 12px 10px 16px;
  border-radius:var(--r-sm);
  font-size:14px;
  font-weight:500;
  color:var(--ink-700);
}
.anchor-link::before{
  content:"";
  position:absolute;
  left:4px;
  top:50%;
  transform:translateY(-50%);
  width:3px;
  height:0;
  border-radius:2px;
  background:var(--brand-600);
  transition:height .2s var(--ease);
}
.anchor-link:hover{background:var(--brand-50);color:var(--brand-700)}
.anchor-link.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.anchor-link.is-active::before{height:18px}

.matrix-cols{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.matrix-col{
  display:flex;
  flex-direction:column;
  gap:24px;
}
.cap-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  padding:26px 24px;
  position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.cap-card::before{
  content:"";
  position:absolute;
  left:24px;
  right:24px;
  top:0;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.cap-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:var(--line-strong);
}
.cap-card:hover::before{transform:scaleX(1)}
.cap-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:var(--r-sm);
  background:var(--brand-50);
  color:var(--brand-600);
  border:1px solid var(--brand-100);
}
.cap-card h3{
  margin-top:18px;
  font-size:20px;
  line-height:1.5;
  font-weight:600;
  color:var(--ink-900);
}
.cap-card p{
  margin-top:10px;
  font-size:15px;
  color:var(--ink-500);
  line-height:1.8;
}
.cap-card .cap-foot{
  margin-top:16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.cap-card.is-highlight{
  background:linear-gradient(180deg,var(--brand-50) 0%,#FFFFFF 62%);
  border-color:var(--brand-100);
}
.cap-card.is-tall{padding-bottom:32px}

.panorama{
  margin-bottom:32px;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  background:var(--surface);
}
.panorama img{
  width:100%;
  aspect-ratio:16/6;
  object-fit:cover;
}
.panorama figcaption{
  padding:14px 20px;
  font-size:13px;
  color:var(--ink-500);
  border-top:1px solid var(--line);
  background:#fff;
}

/* ---------- 相关分类跳转 ---------- */
.related-row{
  display:flex;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  margin-top:32px;
}
.related-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:#fff;
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.related-pill:hover{
  border-color:var(--brand-500);
  color:var(--brand-700);
  background:var(--brand-50);
  transform:translateY(-1px);
  box-shadow:var(--shadow-1);
}
.related-pill.is-current{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
  cursor:default;
}
.related-pill.is-current:hover{
  background:var(--brand-600);
  color:#fff;
  transform:none;
  box-shadow:none;
}

/* ---------- FAQ ---------- */
.faq-accordion{
  max-width:900px;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.faq-accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:#fff;
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-accordion .accordion-item:hover{border-color:var(--line-strong)}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)){
  border-color:var(--brand-100);
  box-shadow:var(--shadow-2);
}
.faq-accordion .accordion-button{
  display:flex;
  align-items:center;
  gap:12px;
  width:100%;
  padding:18px 24px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  background:#fff;
  border:0;
  text-align:left;
  box-shadow:none;
  position:relative;
}
.faq-accordion .accordion-button::before{
  content:"";
  position:absolute;
  left:0;
  top:14px;
  bottom:14px;
  width:3px;
  border-radius:0 2px 2px 0;
  background:var(--brand-600);
  opacity:0;
  transition:opacity .2s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::before{opacity:1}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand-700);
  background:var(--brand-50);
}
.faq-accordion .accordion-button::after{
  margin-left:auto;
  background-image:none;
  width:18px;
  height:18px;
  flex:0 0 18px;
  border-right:2px solid var(--ink-500);
  border-bottom:2px solid var(--ink-500);
  transform:rotate(45deg);
  transition:transform .22s var(--ease);
  border-radius:1px;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);
  border-color:var(--brand-600);
}
.faq-accordion .accordion-button:focus{box-shadow:none}
.faq-accordion .accordion-body{
  padding:0 24px 22px 24px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-700);
}
.faq-q{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:22px;
  height:22px;
  flex:0 0 22px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:12px;
  font-weight:700;
}

/* ---------- 尾部 CTA ---------- */
.tail-cta{
  background:var(--brand-50);
  border-top:1px solid var(--line);
  padding:72px 0;
  text-align:center;
}
.tail-cta h2{
  font-size:30px;
  line-height:1.35;
  font-weight:700;
  color:var(--ink-900);
}
.tail-cta p{
  margin-top:14px;
  font-size:16px;
  color:var(--ink-500);
}
.tail-cta-actions{
  margin-top:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:40px;
}
.footer-brand .brand-text{color:#fff;font-size:18px}
.footer-brand .brand-mark{background:rgba(255,255,255,.1);color:var(--brand-500)}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.6);
  max-width:320px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  line-height:1.7;
  color:rgba(255,255,255,.66);
  padding:5px 0;
}
.footer-col a:hover{color:var(--brand-500)}
.footer-contact{
  margin-top:14px;
  font-size:13px;
  line-height:1.8;
  color:rgba(255,255,255,.5);
}
.footer-bottom{
  margin-top:48px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.footer-bottom-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.footer-bottom-links a{color:rgba(255,255,255,.55)}
.footer-bottom-links a:hover{color:var(--brand-500)}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:44px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--brand-600);
  color:#fff;
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background-color .2s var(--ease),visibility .24s;
  z-index:1040;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-700);color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .cmd-search{width:210px}
  .nav-main{gap:20px}
}
@media (max-width:991px){
  :root{--sp-section:var(--sp-section-md)}
  .hero-cat h1{font-size:30px}
  .hero-cat-row{flex-direction:column;align-items:flex-start;gap:24px}
  .hero-cat-cta{align-items:flex-start}
  .matrix-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .anchor-nav{position:static;display:flex;flex-wrap:wrap;gap:6px;padding:12px}
  .anchor-title{width:100%;padding-bottom:8px;margin-bottom:4px}
  .anchor-link{padding:8px 12px}
  .anchor-link::before{display:none}
  .section-head h2{font-size:26px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  :root{--sp-section:var(--sp-section-sm);--sp-section-md:44px}
  .container-xl{padding-left:16px;padding-right:16px}
  .header-inner{height:62px}
  .hero-cat{padding:28px 0 34px}
  .hero-cat h1{font-size:26px}
  .hero-cat-copy p{font-size:15px}
  .hero-cat-cta{width:100%}
  .hero-cat-cta .btn{width:100%}
  .matrix-cols{grid-template-columns:minmax(0,1fr)}
  .cap-card{padding:22px 20px}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:16px}
  .faq-accordion .accordion-button{padding:16px 18px;font-size:15px}
  .faq-accordion .accordion-body{padding:0 18px 18px}
  .tail-cta{padding:56px 0}
  .tail-cta h2{font-size:24px}
  .tail-cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:479px){
  .brand-text{font-size:17px}
  .hero-cat h1{font-size:23px}
  .panorama img{aspect-ratio:16/9}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg-page:#F6F8FC; --bg-soft:#EEF3FA; --surface:#FFFFFF;
  --line:#E4EAF2; --line-strong:#D3DCE8;
  --brand-700:#0E4FA8; --brand-600:#1668D6; --brand-500:#2E86F0; --brand-100:#E4EFFE; --brand-50:#F3F8FF;
  --accent-600:#0E9C8D; --accent-100:#E2F6F2;
  --warn-500:#F2683C;
  --ink-900:#0D1B2A; --ink-700:#2B3B4E; --ink-500:#5C6E82; --ink-300:#98A7B7;
  --shadow-1:0 1px 2px rgba(13,27,42,.06);
  --shadow-2:0 10px 24px -12px rgba(13,27,42,.14);
  --shadow-3:0 28px 56px -24px rgba(13,27,42,.22);
  --r-xs:6px; --r-sm:10px; --r-md:14px; --r-lg:20px; --r-xl:28px; --r-pill:999px;
  --ease:cubic-bezier(.32,.72,0,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;

  --bs-primary:#1668D6;
  --bs-primary-rgb:22,104,214;
  --bs-body-font-family:var(--font-cn);
  --bs-body-color:#2B3B4E;
  --bs-body-bg:#F6F8FC;
  --bs-border-color:#E4EAF2;
  --bs-border-radius:12px;
  --bs-link-color:#1668D6;
  --bs-link-hover-color:#0E4FA8;
  --bs-heading-color:#0D1B2A;
  --bs-emphasis-color:#0D1B2A;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--bg-page);color:var(--ink-700);
  font-family:var(--font-cn);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{color:var(--ink-900);margin:0;font-weight:700;letter-spacing:0;}
p{margin:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-700);}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}
.container-xl{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;}
.container-wide{max-width:1320px;padding-left:24px;padding-right:24px;margin:0 auto;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;transition:box-shadow .24s var(--ease),border-color .24s var(--ease),height .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;transition:height .24s var(--ease);}
.site-header.is-scrolled .header-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900);}
.brand-mark{
  width:34px;height:34px;border-radius:var(--r-sm);display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-600);color:#fff;box-shadow:0 6px 14px -6px rgba(22,104,214,.6);
}
.brand-text{font-size:19px;font-weight:700;line-height:1.2;color:var(--ink-900);}
.brand-sub{display:block;font-size:12px;font-weight:600;color:var(--brand-600);letter-spacing:0;}
.nav-main{align-items:center;gap:6px;flex:1 1 auto;}
.nav-main .nav-link{
  position:relative;padding:8px 14px;font-size:15px;color:var(--ink-700);border-radius:var(--r-xs);
  background:transparent;border:0;
}
.nav-main .nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;background:var(--brand-600);
  transform:translateX(-50%);transition:width .22s var(--ease);border-radius:2px;
}
.nav-main .nav-link:hover{color:var(--brand-600);}
.nav-main .nav-link.is-active{color:var(--brand-600);font-weight:600;}
.nav-main .nav-link.is-active::after{width:60%;}
.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;width:252px;height:40px;padding:0 10px 0 12px;
  background:#F2F5F9;border:1px solid transparent;border-radius:var(--r-sm);transition:all .2s var(--ease);
}
.command-search i{font-size:14px;color:var(--ink-500);}
.command-search input{
  flex:1 1 auto;border:0;background:transparent;font-size:14px;color:var(--ink-900);outline:none;min-width:0;
}
.command-search input::placeholder{color:var(--ink-300);}
.command-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 4px rgba(22,104,214,.12);}
.kbd{
  font-size:11px;color:var(--ink-500);background:#fff;border:1px solid var(--line-strong);
  border-radius:var(--r-xs);padding:1px 6px;line-height:1.6;white-space:nowrap;
}
.quick-link{font-size:14px;color:var(--ink-700);white-space:nowrap;}
.quick-link:hover{color:var(--brand-600);}
.btn-brand{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--r-sm);
  background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;border:1px solid var(--brand-600);
  transition:all .2s var(--ease);white-space:nowrap;cursor:pointer;
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--r-sm);
  background:#fff;color:var(--ink-900);font-size:15px;font-weight:600;border:1px solid var(--line-strong);
  transition:all .2s var(--ease);white-space:nowrap;cursor:pointer;
}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px);}
.btn-lg-cta{height:48px;padding:0 26px;font-size:16px;}
.menu-toggle{
  width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line-strong);background:#fff;
  color:var(--ink-900);display:inline-flex;align-items:center;justify-content:center;font-size:17px;
}
.menu-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);}
.offcanvas{background:#fff;}
.offcanvas-header{border-bottom:1px solid var(--line);}
.offcanvas-title{font-size:17px;font-weight:700;color:var(--ink-900);}
.mobile-nav{display:flex;flex-direction:column;gap:2px;}
.mobile-nav a{
  padding:12px 4px;font-size:16px;color:var(--ink-700);border-bottom:1px solid var(--line);
}
.mobile-nav a.is-active{color:var(--brand-600);font-weight:600;}
.mobile-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;background:#F2F5F9;border-radius:var(--r-sm);margin:16px 0;}
.mobile-search input{border:0;background:transparent;outline:none;flex:1 1 auto;font-size:15px;color:var(--ink-900);min-width:0;}

/* ---------- breadcrumb ---------- */
.crumb-bar{padding:18px 0 0;}
.breadcrumb{--bs-breadcrumb-divider:"/";margin:0;font-size:14px;}
.breadcrumb-item+.breadcrumb-item::before{color:var(--ink-300);padding:0 8px;}
.breadcrumb-item a{color:var(--ink-500);}
.breadcrumb-item a:hover{color:var(--brand-600);}
.breadcrumb-item.active{color:var(--ink-900);font-weight:600;}

/* ---------- category hero (compact) ---------- */
.cat-hero{
  position:relative;margin-top:18px;border-radius:var(--r-xl);overflow:hidden;
  background-color:var(--bg-soft);
  background-image:linear-gradient(90deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.86) 46%,rgba(243,248,255,.62) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center right;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.cat-hero-inner{
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  min-height:236px;padding:34px 40px;
}
.cat-hero-copy{max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);padding:4px 12px;border-radius:var(--r-pill);margin-bottom:14px;
}
.eyebrow::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--brand-600);}
.cat-hero h1{font-size:34px;line-height:1.3;margin-bottom:12px;}
.cat-hero h1 span{color:var(--brand-600);}
.cat-hero-lead{font-size:16px;color:var(--ink-700);max-width:560px;}
.cat-hero-side{flex:0 0 auto;display:flex;flex-direction:column;gap:14px;align-items:flex-end;}
.platform-switch{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 18px;box-shadow:var(--shadow-2);min-width:280px;}
.switch-label{display:block;font-size:13px;color:var(--ink-500);margin-bottom:10px;}
.switch-pills{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:var(--r-pill);
  background:#F2F5F9;color:var(--ink-700);font-size:14px;font-weight:600;border:1px solid transparent;
  transition:all .2s var(--ease);
}
.pill:hover{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-100);}
.pill.is-active{background:var(--brand-600);color:#fff;}
.pill.is-active:hover{background:var(--brand-700);color:#fff;}

/* ---------- section base ---------- */
.section{padding:88px 0 0;}
.section-tight{padding:56px 0 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{font-size:32px;line-height:1.3;margin-bottom:14px;}
.section-head p{font-size:15px;color:var(--ink-500);}
.section-head.with-aside{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.tag-line{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-600);margin-bottom:12px;}
.tag-line::before{content:"";width:4px;height:14px;background:var(--brand-600);border-radius:2px;}
.text-link{font-size:14px;font-weight:600;color:var(--brand-600);border-bottom:1px solid transparent;padding-bottom:2px;transition:all .2s var(--ease);}
.text-link:hover{border-bottom-color:var(--brand-600);}

/* ---------- timeline ---------- */
.timeline-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:36px 40px;box-shadow:var(--shadow-1);}
.step-timeline{position:relative;}
.step-item{position:relative;display:flex;gap:22px;padding-bottom:34px;}
.step-item:last-child{padding-bottom:0;}
.step-item::before{
  content:"";position:absolute;left:19px;top:44px;bottom:0;width:2px;background:var(--line);
}
.step-item:last-child::before{display:none;}
.step-dot{
  flex:0 0 auto;width:40px;height:40px;border-radius:50%;background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
  box-shadow:0 8px 18px -10px rgba(22,104,214,.8);z-index:1;
}
.step-item.is-done .step-dot{background:var(--accent-600);box-shadow:0 8px 18px -10px rgba(14,156,141,.8);}
.step-body{flex:1 1 auto;min-width:0;}
.step-body h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step-body p{font-size:15px;color:var(--ink-700);}
.step-points{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}
.step-points li{
  font-size:13px;color:var(--ink-700);background:var(--bg-soft);border-radius:var(--r-pill);
  padding:4px 12px;display:inline-flex;align-items:center;gap:6px;
}
.step-points li i{color:var(--accent-600);font-size:11px;}
.step-figure{margin-top:16px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);background:var(--bg-soft);}
.step-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.step-figure figcaption{font-size:13px;color:var(--ink-500);padding:10px 14px;background:#fff;border-top:1px solid var(--line);}

/* ---------- spec cards ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-1);padding:26px 26px 20px;transition:box-shadow .22s var(--ease),transform .22s var(--ease);}
.spec-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.spec-card-head{display:flex;align-items:center;gap:10px;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.spec-card-head h3{font-size:19px;font-weight:600;}
.spec-list{margin-top:6px;}
.spec-row{display:flex;gap:18px;padding:12px 0;border-bottom:1px dashed var(--line);}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{flex:0 0 104px;font-size:14px;color:var(--ink-500);font-weight:400;}
.spec-row dd{margin:0;flex:1 1 auto;font-size:15px;color:var(--ink-900);}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;height:22px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-700);white-space:nowrap;
}
.badge-accent{background:var(--accent-100);color:var(--accent-600);}
.badge-warn{background:var(--warn-500);color:#fff;}

/* ---------- download panel ---------- */
.download-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:40px;
  box-shadow:var(--shadow-3);
}
.download-panel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:26px;}
.download-panel-head h2{font-size:26px;margin-bottom:8px;}
.download-panel-head p{font-size:15px;color:var(--ink-500);max-width:620px;}
.download-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.dl-btn{
  display:flex;align-items:center;gap:14px;min-height:68px;padding:14px 18px;background:#fff;
  border:1px solid var(--line-strong);border-radius:var(--r-md);color:var(--ink-900);
  transition:all .2s var(--ease);
}
.dl-btn i.dl-icon{
  flex:0 0 auto;width:38px;height:38px;border-radius:var(--r-sm);background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-size:17px;
}
.dl-btn .dl-text{min-width:0;}
.dl-btn .dl-name{display:block;font-size:15px;font-weight:600;line-height:1.5;}
.dl-btn .dl-meta{display:block;font-size:12px;color:var(--ink-500);line-height:1.6;}
.dl-btn:hover{border-color:var(--brand-500);box-shadow:var(--shadow-2);transform:translateY(-2px);color:var(--brand-700);}
.dl-btn.is-primary{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
.dl-btn.is-primary .dl-icon{background:rgba(255,255,255,.16);color:#fff;}
.dl-btn.is-primary .dl-meta{color:rgba(255,255,255,.78);}
.dl-btn.is-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;}
.panel-note{
  margin-top:24px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 28px;font-size:14px;color:var(--ink-500);
}
.panel-note span{display:inline-flex;align-items:center;gap:8px;}
.panel-note i{color:var(--accent-600);}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.check-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow-1);transition:all .22s var(--ease);}
.check-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.check-card h3{font-size:17px;font-weight:600;margin:14px 0 10px;}
.check-card p{font-size:14px;color:var(--ink-500);}
.check-icon{
  width:44px;height:44px;border-radius:var(--r-sm);background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;
}

/* ---------- faq ---------- */
.faq-list{max-width:900px;}
.accordion-item{
  background:#fff;border:1px solid var(--line)!important;border-radius:var(--r-md)!important;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-1);
}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--ink-900);background:#fff;padding:18px 22px;gap:12px;
  border-radius:var(--r-md)!important;box-shadow:none!important;
}
.accordion-button::before{
  content:"";flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--brand-100);
  border:2px solid var(--brand-600);box-sizing:content-box;
}
.accordion-button:not(.collapsed){color:var(--brand-700);background:var(--brand-50);}
.accordion-button:not(.collapsed)::before{background:var(--brand-600);}
.accordion-button::after{width:14px;height:14px;background-size:14px;}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-body{font-size:15px;line-height:1.8;color:var(--ink-700);padding:0 22px 20px 46px;border-left:3px solid var(--brand-600);margin-left:0;}
.accordion-button:not(.collapsed)+.accordion-collapse .accordion-body{background:#fff;}

/* ---------- cta ---------- */
.cta-block{
  margin-top:88px;background:var(--brand-50);border-top:1px solid var(--line);padding:64px 0;
}
.cta-inner{text-align:center;max-width:720px;margin:0 auto;}
.cta-inner h2{font-size:30px;margin-bottom:14px;}
.cta-inner p{font-size:15px;color:var(--ink-500);margin-bottom:26px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:0;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;}
.footer-brand .brand-text{color:#fff;font-size:18px;display:inline-flex;align-items:center;gap:10px;}
.footer-brand .brand-mark{width:32px;height:32px;background:var(--brand-600);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.62);padding:5px 0;transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand-500);}
.footer-contact{font-size:13px;color:rgba(255,255,255,.5);margin-top:12px;line-height:1.8;max-width:260px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.footer-bottom-links a{color:rgba(255,255,255,.55);}
.footer-bottom-links a:hover{color:var(--brand-500);}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;border:0;
  background:var(--brand-600);color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;box-shadow:var(--shadow-2);opacity:0;pointer-events:none;transform:translateY(8px);
  transition:all .24s var(--ease);z-index:1040;cursor:pointer;
}
.to-top.is-show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{background:var(--brand-700);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .command-search{width:210px;}
  .cat-hero h1{font-size:30px;}
}
@media (max-width:991.98px){
  .container-xl,.container-wide{padding-left:20px;padding-right:20px;}
  .cat-hero-inner{flex-direction:column;align-items:flex-start;gap:24px;padding:28px;}
  .cat-hero-side{align-items:stretch;width:100%;}
  .platform-switch{min-width:0;width:100%;}
  .section{padding-top:64px;}
  .section-head h2{font-size:26px;}
  .cat-hero h1{font-size:28px;}
  .spec-grid{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .timeline-wrap{padding:28px 24px;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .section{padding-top:52px;}
  .section-tight{padding-top:44px;}
  .section-head h2{font-size:24px;}
  .cat-hero{border-radius:var(--r-lg);}
  .cat-hero-inner{padding:24px 20px;min-height:0;}
  .cat-hero h1{font-size:24px;}
  .download-panel{padding:24px 20px;border-radius:var(--r-lg);}
  .download-grid{grid-template-columns:1fr;}
  .dl-btn{width:100%;}
  .check-grid{grid-template-columns:1fr;}
  .step-item{gap:16px;}
  .step-body h3{font-size:17px;}
  .cta-block{margin-top:52px;padding:48px 0;}
  .cta-inner h2{font-size:23px;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .accordion-body{padding:0 18px 18px 18px;}
  .spec-row{flex-direction:column;gap:4px;}
  .spec-row dt{flex:none;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:479.98px){
  .cat-hero h1{font-size:21px;}
  .brand-text{font-size:16px;}
  .timeline-wrap{padding:22px 16px;}
  .step-dot{width:34px;height:34px;font-size:13px;}
  .step-item::before{left:16px;top:38px;}
  .pill{padding:0 10px;font-size:13px;}
}

/* roulang page: category3 */
:root{
  --bg-page:#F6F8FC;
  --bg-soft:#EEF3FA;
  --surface:#FFFFFF;
  --line:#E4EAF2;
  --line-strong:#D3DCE8;

  --brand-700:#0E4FA8;
  --brand-600:#1668D6;
  --brand-500:#2E86F0;
  --brand-100:#E4EFFE;
  --brand-50:#F3F8FF;

  --accent-600:#0E9C8D;
  --accent-100:#E2F6F2;

  --warn-500:#F2683C;

  --ink-900:#0D1B2A;
  --ink-700:#2B3B4E;
  --ink-500:#5C6E82;
  --ink-300:#98A7B7;

  --shadow-1:0 1px 2px rgba(13,27,42,.06);
  --shadow-2:0 10px 24px -12px rgba(13,27,42,.14);
  --shadow-3:0 28px 56px -24px rgba(13,27,42,.22);

  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;

  --fs-h1:44px;
  --fs-h2:32px;
  --fs-body:16px;

  --ease:cubic-bezier(.32,.72,0,1);

  --bs-primary:#1668D6;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-color:#2B3B4E;
  --bs-body-bg:#FFFFFF;
  --bs-border-color:#E4EAF2;
  --bs-border-radius:14px;
  --bs-link-color:#1668D6;
  --bs-link-hover-color:#0E4FA8;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-page);
  color:var(--ink-700);
  font-family:var(--bs-body-font-family);
  font-size:var(--fs-body);
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease)}
a:hover{color:var(--brand-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px;
  border-radius:var(--r-xs);
}

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

/* ---------- 按钮 ---------- */
.btn{
  border-radius:var(--r-sm);
  font-weight:600;
  font-size:15px;
  padding:0 22px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  transition:all .22s var(--ease);
  box-shadow:none;
}
.btn:focus,.btn:focus-visible{box-shadow:0 0 0 4px rgba(46,134,240,.22);outline:none}
.btn-primary{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
}
.btn-primary:hover{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-2);
}
.btn-primary:active{transform:translateY(0);background:var(--brand-700)}
.btn-outline{
  background:#fff;
  border:1px solid var(--line-strong);
  color:var(--ink-900);
}
.btn-outline:hover{
  background:var(--brand-50);
  border-color:var(--brand-500);
  color:var(--brand-700);
  transform:translateY(-1px);
}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-link-plain{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand-600);
  font-weight:600;
  font-size:15px;
  border-bottom:1px solid rgba(22,104,214,.35);
  padding-bottom:4px;
  line-height:1.4;
}
.btn-link-plain:hover{border-bottom-color:var(--brand-700);color:var(--brand-700)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:24px;
  transition:height .25s var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--ink-900);
}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:34px;height:34px;
  border-radius:var(--r-sm);
  background:linear-gradient(140deg,var(--brand-600),var(--brand-500));
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  box-shadow:0 6px 14px -8px rgba(22,104,214,.9);
}
.brand-name{
  font-size:19px;
  font-weight:700;
  line-height:1.1;
  color:var(--ink-900);
  display:inline-flex;
  align-items:baseline;
  gap:4px;
}
.brand-name .brand-sub{
  font-size:13px;
  font-weight:600;
  color:var(--brand-600);
}

.nav-main{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
}
.nav-main .nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-700);
  padding:8px 12px;
  border-radius:var(--r-xs);
  white-space:nowrap;
}
.nav-main .nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;
  height:2px;
  background:var(--brand-600);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-main .nav-link:hover{color:var(--brand-600)}
.nav-main .nav-link:hover::after{width:60%}
.nav-main .nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-main .nav-link.is-active::after{width:60%}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.command-search{
  width:250px;
  height:40px;
  border-radius:var(--r-sm);
  background:#F2F5F9;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:0 12px;
  color:var(--ink-500);
  border:1px solid transparent;
  transition:all .22s var(--ease);
}
.command-search:focus-within{
  background:#fff;
  border-color:var(--brand-600);
  box-shadow:0 0 0 4px rgba(22,104,214,.12);
}
.command-search input{
  border:0;
  background:transparent;
  outline:none;
  flex:1 1 auto;
  min-width:0;
  font-size:14px;
  color:var(--ink-700);
}
.command-search input::placeholder{color:var(--ink-300)}
.kbd{
  font-size:11px;
  line-height:1;
  padding:4px 6px;
  border-radius:5px;
  background:#fff;
  border:1px solid var(--line-strong);
  color:var(--ink-500);
  font-weight:600;
}
.quick-link{
  font-size:14px;
  color:var(--ink-700);
  padding:0 4px;
}
.quick-link:hover{color:var(--brand-600)}

.nav-toggle{
  width:42px;height:42px;
  border:1px solid var(--line-strong);
  background:#fff;
  border-radius:var(--r-sm);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-900);
}

.nav-drawer{background:#fff}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 20px;
  border-bottom:1px solid var(--line);
}
.drawer-body{padding:20px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{
  font-size:16px;
  color:var(--ink-900);
  padding:12px 14px;
  border-radius:var(--r-sm);
  background:var(--bg-soft);
}
.drawer-nav a.is-active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.drawer-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:#F7F9FC;
  padding:0 12px;
  color:var(--ink-500);
  margin-bottom:16px;
}
.drawer-search input{border:0;background:transparent;outline:none;flex:1 1 auto;font-size:15px;color:var(--ink-700)}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-500);
  margin-bottom:16px;
}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-600)}
.crumb .sep{color:var(--ink-300)}
.crumb .current{color:var(--ink-900);font-weight:600}

/* ---------- 极简 Hero ---------- */
.hero-mini{
  position:relative;
  background:var(--bg-soft);
  border-bottom:1px solid var(--line);
  padding:34px 0 34px;
  overflow:hidden;
}
.hero-mini::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.14;
  pointer-events:none;
}
.hero-mini .container-xl{position:relative;z-index:1}
.hero-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:40px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--brand-700);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:5px 14px 5px 12px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:4px;height:14px;
  border-radius:2px;
  background:var(--brand-600);
}
.hero-mini h1{
  font-size:34px;
  line-height:1.3;
  margin-bottom:12px;
}
.hero-mini h1 .h1-key{
  display:block;
  font-size:17px;
  font-weight:600;
  color:var(--brand-600);
  margin-top:6px;
}
.hero-mini .hero-desc{
  font-size:15px;
  color:var(--ink-500);
  max-width:640px;
}

.filter-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-2);
  padding:20px;
}
.filter-panel h2{
  font-size:15px;
  font-weight:600;
  margin-bottom:12px;
  color:var(--ink-900);
}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.chip{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  font-size:13px;
  border-radius:var(--r-pill);
  background:var(--brand-50);
  color:var(--brand-700);
  border:1px solid transparent;
  transition:all .2s var(--ease);
}
.chip:hover{background:var(--brand-100);color:var(--brand-700)}
.chip.is-on{background:var(--brand-600);color:#fff}
.chip.chip-accent{background:var(--accent-100);color:var(--accent-600)}
.filter-search{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#F7F9FC;
  padding:0 14px;
  color:var(--ink-500);
  transition:all .2s var(--ease);
}
.filter-search:focus-within{background:#fff;border-color:var(--brand-600);box-shadow:0 0 0 4px rgba(22,104,214,.12)}
.filter-search input{border:0;background:transparent;outline:none;flex:1 1 auto;font-size:15px;color:var(--ink-700)}
.filter-note{font-size:12px;color:var(--ink-300);margin-top:10px}

/* ---------- 区块通用 ---------- */
.section{padding:72px 0}
.section-tight{padding:56px 0}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{
  font-size:28px;
  line-height:1.35;
  margin-bottom:12px;
}
.section-head p{font-size:15px;color:var(--ink-500)}

.quick-index{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin-top:-26px;
  position:relative;
  z-index:2;
}
.quick-index a{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  padding:16px 18px;
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--ink-900);
  font-size:15px;
  font-weight:600;
  transition:all .22s var(--ease);
}
.quick-index a:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:var(--brand-500);
  color:var(--brand-700);
}
.quick-index .qi-num{
  width:26px;height:26px;
  border-radius:8px;
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:13px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
}

/* ---------- 问答分组 ---------- */
.qa-group{margin-bottom:44px}
.qa-group:last-child{margin-bottom:0}
.group-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:18px;
  border-bottom:1px solid var(--line);
  padding-bottom:14px;
}
.group-head h2{
  font-size:23px;
  line-height:1.4;
  display:flex;
  align-items:center;
  gap:12px;
}
.group-head h2::before{
  content:"";
  width:4px;height:20px;
  border-radius:2px;
  background:var(--brand-600);
  flex:0 0 auto;
}
.group-head .group-count{
  font-size:13px;
  color:var(--ink-500);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:4px 12px;
  white-space:nowrap;
}

.accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-md) !important;
  background:var(--surface);
  box-shadow:var(--shadow-1);
  margin-bottom:12px;
  overflow:hidden;
}
.accordion-item:last-child{margin-bottom:0}
.accordion-button{
  background:var(--surface);
  color:var(--ink-900);
  font-size:16px;
  font-weight:600;
  padding:16px 20px;
  box-shadow:none;
  display:flex;
  align-items:center;
  gap:12px;
  line-height:1.5;
}
.accordion-button::before{
  content:"Q";
  width:24px;height:24px;
  border-radius:50%;
  background:var(--brand-50);
  color:var(--brand-600);
  font-size:12px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
}
.accordion-button::after{
  background-image:none;
  width:11px;height:11px;
  border-right:2px solid var(--ink-300);
  border-bottom:2px solid var(--ink-300);
  border-radius:1px;
  transform:rotate(45deg);
  margin-left:auto;
  margin-top:-5px;
  transition:transform .22s var(--ease),border-color .22s var(--ease);
  flex:0 0 auto;
}
.accordion-button:not(.collapsed){
  color:var(--brand-700);
  background:var(--brand-50);
  box-shadow:inset 3px 0 0 var(--brand-600);
}
.accordion-button:not(.collapsed)::before{background:var(--brand-600);color:#fff}
.accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);
  border-color:var(--brand-600);
  margin-top:2px;
}
.accordion-button:focus{box-shadow:0 0 0 4px rgba(46,134,240,.18)}
.accordion-body{
  padding:0 20px 18px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-700);
}
.accordion-body p{margin-bottom:10px}
.accordion-body p:last-child{margin-bottom:0}
.accordion-body ul{margin:10px 0 0;display:flex;flex-direction:column;gap:8px}
.accordion-body li{
  position:relative;
  padding-left:18px;
  font-size:15px;
  color:var(--ink-700);
}
.accordion-body li::before{
  content:"";
  position:absolute;
  left:2px;
  top:10px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--brand-500);
}
.answer-note{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--accent-600);
  background:var(--accent-100);
  border-radius:var(--r-pill);
  padding:4px 12px;
  margin-top:12px;
}

/* ---------- 热门入口 ---------- */
.entry-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.entry-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:all .22s var(--ease);
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.entry-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-soft);
}
.entry-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.entry-card:hover .entry-thumb img{transform:scale(1.03)}
.entry-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.entry-body h3{font-size:18px;line-height:1.5}
.entry-body p{font-size:14px;color:var(--ink-500);line-height:1.75}
.entry-body .entry-link{
  margin-top:auto;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.entry-card:hover .entry-link{color:var(--brand-700)}
.badge-soft{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  font-size:12px;
  border-radius:var(--r-pill);
  background:var(--brand-50);
  color:var(--brand-700);
  font-weight:600;
}
.badge-accent{background:var(--accent-100);color:var(--accent-600)}
.badge-warn{background:var(--warn-500);color:#fff}

/* ---------- 咨询表单 ---------- */
.help-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--shadow-3);
  padding:36px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.help-card h2{font-size:26px;line-height:1.4;margin-bottom:12px}
.help-card .help-desc{font-size:15px;color:var(--ink-500);margin-bottom:20px}
.help-list{display:flex;flex-direction:column;gap:12px}
.help-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--ink-700);
  line-height:1.7;
}
.help-list li span.dot{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand-500);
  margin-top:9px;
  flex:0 0 auto;
}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  margin-bottom:8px;
}
.form-control-custom{
  width:100%;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:0 14px;
  background:#fff;
  color:var(--ink-900);
  font-size:15px;
  transition:all .2s var(--ease);
}
textarea.form-control-custom{height:110px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-control-custom::placeholder{color:var(--ink-300)}
.form-control-custom:focus{
  outline:none;
  border-color:var(--brand-600);
  box-shadow:0 0 0 4px rgba(22,104,214,.12);
}
.form-hint{font-size:12px;color:var(--ink-500);margin-top:10px}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  background:var(--brand-50);
  border-top:1px solid var(--line);
  padding:64px 0;
  text-align:center;
}
.cta-band h2{font-size:28px;line-height:1.4;margin-bottom:12px}
.cta-band p{font-size:15px;color:var(--ink-500);max-width:620px;margin:0 auto 26px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:#C6D2E0;
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand-text{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:18px;
  font-weight:700;
  margin-bottom:14px;
}
.footer-brand .brand-mark{
  width:32px;height:32px;
  border-radius:var(--r-sm);
  background:linear-gradient(140deg,var(--brand-500),var(--brand-600));
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.footer-brand p{font-size:14px;line-height:1.85;color:#93A5B8;max-width:340px}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:#93A5B8;
  margin-bottom:11px;
}
.footer-col a:hover{color:var(--brand-500)}
.footer-contact{font-size:13px;color:#7E90A3;line-height:1.8;margin-top:6px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#7E90A3;
}
.footer-bottom-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.footer-bottom-links a{color:#93A5B8;font-size:13px}
.footer-bottom-links a:hover{color:var(--brand-500)}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:44px;height:44px;
  border-radius:50%;
  background:var(--brand-600);
  color:#fff;
  border:0;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:all .25s var(--ease);
  z-index:1040;
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-700)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .command-search{width:200px}
  .hero-grid{gap:28px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}
}
@media (max-width:991px){
  .header-inner{height:64px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .hero-mini{padding:26px 0 30px}
  .hero-grid{grid-template-columns:1fr;gap:24px}
  .hero-mini h1{font-size:28px}
  .quick-index{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:-18px}
  .entry-grid{grid-template-columns:1fr;gap:18px}
  .help-card{grid-template-columns:1fr;padding:26px;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section-head h2{font-size:24px}
  .group-head h2{font-size:20px}
}
@media (max-width:767px){
  .container-xl{padding-left:16px;padding-right:16px}
  .section{padding:52px 0}
  .hero-mini h1{font-size:24px}
  .hero-mini h1 .h1-key{font-size:15px}
  .hero-mini .hero-desc{font-size:14px}
  .quick-index{grid-template-columns:1fr;gap:12px}
  .quick-index a{font-size:14px;padding:14px 16px}
  .cta-band{padding:52px 0}
  .cta-band h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-brand p{max-width:none}
  .accordion-button{font-size:15px;padding:14px 16px}
  .accordion-body{padding:0 16px 16px}
  .group-head{flex-direction:column;align-items:flex-start;gap:10px}
  .to-top{right:16px;bottom:18px}
}
@media (max-width:479px){
  .brand-name{font-size:17px}
  .brand-name .brand-sub{font-size:12px}
  .help-card{padding:20px}
  .btn{font-size:14px;padding:0 18px}
  .btn-lg{height:46px;font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}