/* roulang page: index */
:root{
  --brand-900:#170E2B;
  --brand-700:#4B21A8;
  --brand-600:#5E2ED6;
  --brand-500:#7A4DF0;
  --accent-600:#E8621A;
  --accent-500:#FF7A2F;
  --mint-500:#17C39A;
  --bg:#F7F5FC;
  --bg-warm:#FFF8F1;
  --surface:#FFFFFF;
  --text:#1C1526;
  --text-muted:#6A6279;
  --line:#E8E3F2;
  --disabled:#D8D3E3;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-pill:999px;
  --radius-block:24px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(23,14,43,.05),0 2px 8px rgba(23,14,43,.05);
  --shadow-md:0 6px 20px rgba(23,14,43,.08);
  --shadow-lg:0 18px 40px rgba(23,14,43,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media(min-width:1024px){.container{padding:0 24px;}}
.section{padding:72px 0;}
@media(max-width:1023px){.section{padding:56px 0;}}
@media(max-width:639px){.section{padding:44px 0;}}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 顶部公告条 ---------- */
.topbar{background:var(--brand-900);color:#fff;font-size:13px;line-height:34px;height:34px;overflow:hidden;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar__note{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar__dot{width:6px;height:6px;border-radius:50%;background:var(--mint-500);flex:0 0 auto;box-shadow:0 0 0 3px rgba(23,195,154,.22);}
.topbar__meta{color:#C9B8FF;white-space:nowrap;}
@media(max-width:767px){.topbar__meta{display:none;}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .2s var(--ease),border-color .2s var(--ease);}
.site-header.is-scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--line);}
.header__inner{display:flex;align-items:center;gap:20px;height:68px;}
@media(max-width:639px){.header__inner{height:60px;gap:12px;}}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand-600),var(--brand-700));display:grid;place-items:center;color:#fff;box-shadow:0 4px 12px rgba(94,46,214,.32);}
.brand__mark svg{width:20px;height:20px;}
.brand__text{font-size:19px;font-weight:700;letter-spacing:.5px;color:var(--text);}
@media(max-width:400px){.brand__text{font-size:17px;}}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav__link{position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;color:var(--text);transition:background .2s var(--ease),color .2s var(--ease);}
.nav__link::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:center;transition:transform .2s var(--ease);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link:hover{color:var(--brand-700);}
.nav__link.is-active{background:rgba(94,46,214,.08);color:var(--brand-700);font-weight:700;}
.nav__link.is-active::after{transform:scaleX(0);}
.header__actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search{display:flex;align-items:center;gap:8px;width:220px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg);transition:border-color .2s var(--ease),background .2s var(--ease);}
.search:focus-within{border-color:var(--brand-600);background:#fff;}
.search svg{width:16px;height:16px;color:var(--text-muted);flex:0 0 auto;}
.search input{width:100%;border:0;outline:none;background:transparent;font-size:14px;color:var(--text);}
.search input::placeholder{color:#9A93A8;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--radius-btn);font-weight:600;font-size:15px;line-height:1;padding:0 22px;height:48px;transition:transform .16s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--primary{background:var(--accent-600);color:#fff;box-shadow:0 4px 14px rgba(232,98,26,.28);}
.btn--primary:hover{background:#D2570F;box-shadow:var(--shadow-md);}
.btn--primary:active{transform:translateY(1px);}
.btn--outline{background:#fff;color:var(--brand-700);border-color:var(--brand-600);}
.btn--outline:hover{background:rgba(94,46,214,.06);box-shadow:var(--shadow-sm);}
.btn--ghostlight{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn--ghostlight:hover{background:rgba(255,255,255,.12);}
.btn[disabled]{background:var(--disabled);color:#fff;cursor:not-allowed;box-shadow:none;}
.btn--block{width:100%;}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;align-items:center;justify-content:center;flex-direction:column;gap:5px;}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
@media(max-width:1023px){
  .nav,.search{display:none;}
  .hamburger{display:inline-flex;}
}
@media(max-width:639px){.header__actions .btn--primary{display:none;}}

/* ---------- 移动抽屉 ---------- */
.drawer-overlay{position:fixed;inset:0;background:rgba(23,14,43,.5);opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s;z-index:90;}
.drawer-overlay.is-open{opacity:1;visibility:visible;}
.drawer{position:fixed;top:0;right:0;height:100%;width:88%;max-width:360px;background:#fff;z-index:100;transform:translateX(100%);transition:transform .26s var(--ease);display:flex;flex-direction:column;padding:20px;overflow-y:auto;}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer__close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:20px;color:var(--text);line-height:1;}
.drawer__search{display:flex;align-items:center;gap:8px;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg);margin-bottom:12px;}
.drawer__search input{border:0;outline:none;background:transparent;width:100%;font-size:15px;}
.drawer__nav a{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);font-size:16px;font-weight:600;color:var(--text);}
.drawer__nav a:first-child{border-top:1px solid var(--line);}
.drawer__nav a.is-active{color:var(--brand-700);}
.drawer__nav span{color:#B7B0C6;font-size:15px;}
.drawer__cta{margin-top:20px;display:grid;gap:12px;}
.drawer__contact{margin-top:22px;font-size:14px;color:var(--text-muted);line-height:1.9;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 420px at 12% -10%,rgba(122,77,240,.14),transparent 62%),
  radial-gradient(700px 360px at 88% 8%,rgba(255,122,47,.10),transparent 60%),
  var(--bg);}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(94,46,214,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(94,46,214,.05) 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);pointer-events:none;}
.hero__inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center;padding:72px 0 80px;min-height:520px;}
@media(max-width:1023px){
  .hero__inner{grid-template-columns:1fr;gap:28px;padding:48px 0 56px;min-height:0;}
}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:var(--radius-pill);background:rgba(94,46,214,.09);color:var(--brand-700);font-size:13px;font-weight:600;letter-spacing:.3px;}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:block;}
.hero__title{margin-top:20px;font-size:46px;line-height:1.25;font-weight:700;letter-spacing:-.5px;color:var(--text);}
.hero__title em{font-style:normal;color:var(--brand-700);}
@media(max-width:1023px){.hero__title{font-size:34px;}}
@media(max-width:639px){.hero__title{font-size:29px;margin-top:16px;}}
.hero__sub{margin-top:18px;font-size:18px;line-height:1.85;color:var(--text-muted);max-width:560px;}
@media(max-width:639px){.hero__sub{font-size:16px;}}
.hero__actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}
@media(max-width:639px){.hero__actions{flex-direction:column;}.hero__actions .btn{width:100%;}}
.hero__trust{margin-top:32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;}
@media(max-width:767px){.hero__trust{grid-template-columns:repeat(2,minmax(0,1fr));}}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);}
.trust-item svg{width:16px;height:16px;color:var(--mint-500);flex:0 0 auto;}
.hero__media{position:relative;border-radius:var(--radius-block);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/3;background:linear-gradient(135deg,var(--brand-900),var(--brand-600));}
.hero__media img{width:100%;height:100%;object-fit:cover;}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(75,33,168,.08);}
.hero__badge{position:absolute;left:18px;bottom:18px;z-index:2;background:rgba(23,14,43,.86);color:#fff;border-radius:var(--radius-pill);padding:8px 16px;font-size:13px;font-weight:600;backdrop-filter:blur(6px);}
@media(max-width:1023px){.hero__media{aspect-ratio:16/10;}}

/* ---------- 通用板块头 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.section-head__title{font-size:32px;line-height:1.35;font-weight:700;letter-spacing:-.3px;}
@media(max-width:639px){.section-head__title{font-size:23px;}}
.section-head__sub{margin-top:8px;font-size:15px;color:var(--text-muted);}
.textlink{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-700);white-space:nowrap;}
.textlink svg{width:16px;height:16px;transition:transform .2s var(--ease);}
.textlink:hover svg{transform:translateX(4px);}

/* ---------- 商品网格 ---------- */
.pgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.pcard{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease);}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.pcard__media{position:relative;aspect-ratio:4/3;background:linear-gradient(135deg,rgba(23,14,43,.9),rgba(94,46,214,.9));overflow:hidden;}
.pcard__media img{width:100%;height:100%;object-fit:cover;}
.pcard__tag{position:absolute;left:12px;top:12px;z-index:2;padding:5px 12px;border-radius:var(--radius-pill);font-size:12px;font-weight:600;color:#fff;background:var(--accent-600);}
.pcard__tag--mint{background:var(--mint-500);}
.pcard__body{padding:16px;display:flex;flex-direction:column;gap:8px;flex:1;}
.pcard__title{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pcard__desc{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.pcard__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px dashed var(--line);}
.price{font-size:20px;font-weight:700;color:var(--accent-600);}
.price small{font-size:13px;font-weight:500;color:var(--text-muted);margin-left:6px;text-decoration:line-through;}
.pill-btn{display:inline-flex;align-items:center;justify-content:center;height:34px;padding:0 16px;border-radius:var(--radius-pill);background:rgba(94,46,214,.08);color:var(--brand-700);font-size:14px;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease);}
.pill-btn:hover{background:var(--brand-600);color:#fff;}
.pcard--hero{grid-column:span 2;grid-row:span 2;}
.pcard--hero .pcard__media{aspect-ratio:16/10;}
.pcard--hero .pcard__title{font-size:22px;}
.pcard--hero .pcard__desc{-webkit-line-clamp:2;font-size:15px;}
@media(max-width:1023px){
  .pgrid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .pcard--hero{grid-column:span 2;grid-row:auto;}
}
@media(max-width:639px){
  .pgrid{grid-template-columns:1fr;}
  .pcard--hero{grid-column:span 1;}
}

/* ---------- 评价轮播 ---------- */
.reviews{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.reviews__wrap{position:relative;}
.reviews__track{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:6px;}
.reviews__track::-webkit-scrollbar{display:none;}
.review{flex:0 0 calc((100% - 40px)/3);scroll-snap-align:start;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;display:flex;flex-direction:column;gap:14px;}
@media(max-width:1023px){.review{flex:0 0 calc((100% - 20px)/2);}}
@media(max-width:639px){.review{flex:0 0 86%;padding:20px;}}
.stars{display:flex;gap:3px;color:var(--mint-500);font-size:15px;letter-spacing:2px;}
.review__text{font-size:15px;line-height:1.85;color:var(--text);}
.review__user{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;border-top:1px dashed var(--line);}
.review__avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;background:linear-gradient(135deg,var(--brand-600),var(--brand-900));display:grid;place-items:center;color:#fff;font-size:15px;font-weight:600;flex:0 0 auto;}
.review__avatar img{width:100%;height:100%;object-fit:cover;}
.review__name{font-size:15px;font-weight:600;}
.review__meta{font-size:12px;color:var(--text-muted);}
.review__time{margin-left:auto;font-size:12px;color:var(--text-muted);}
.reviews__nav{display:flex;align-items:center;justify-content:space-between;margin-top:24px;}
.reviews__dots{display:flex;gap:8px;}
.dot{width:8px;height:8px;border-radius:50%;background:#D8D3E3;border:0;padding:0;transition:background .2s var(--ease),width .2s var(--ease);}
.dot.is-active{background:var(--brand-600);width:22px;border-radius:4px;}
.reviews__arrows{display:flex;gap:10px;}
.arrow-btn{width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);display:grid;place-items:center;color:var(--text);transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);}
.arrow-btn:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.arrow-btn svg{width:18px;height:18px;}

/* ---------- 保障条 ---------- */
.guarantee{background:var(--bg-warm);padding:0;}
.guarantee__inner{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));min-height:88px;align-items:center;}
.guarantee__item{display:flex;align-items:center;gap:14px;padding:18px 20px;position:relative;}
.guarantee__item+.guarantee__item::before{content:"";position:absolute;left:0;top:22%;bottom:22%;width:1px;background-image:linear-gradient(to bottom,var(--line) 50%,transparent 50%);background-size:1px 8px;}
.guarantee__item svg{width:28px;height:28px;color:var(--brand-600);flex:0 0 auto;}
.guarantee__label{font-size:15px;font-weight:600;}
.guarantee__desc{font-size:13px;color:var(--text-muted);line-height:1.7;}
@media(max-width:1023px){.guarantee__inner{grid-template-columns:repeat(2,minmax(0,1fr));}.guarantee__item:nth-child(3)::before{display:none;}}
@media(max-width:639px){.guarantee__inner{grid-template-columns:repeat(2,minmax(0,1fr));}.guarantee__item{padding:14px 12px;}}

/* ---------- 最新资讯 ---------- */
.news__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media(max-width:1023px){.news__grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:639px){.news__grid{grid-template-columns:1fr;}}
.news-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease);}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.news-card__media{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,rgba(23,14,43,.9),rgba(94,46,214,.85));}
.news-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.news-card:hover .news-card__media img{transform:scale(1.04);}
.news-card__cat{position:absolute;left:12px;top:12px;padding:5px 12px;border-radius:var(--radius-pill);background:rgba(23,14,43,.82);color:#fff;font-size:12px;font-weight:600;}
.news-card__body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card__title{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__sum{font-size:14px;color:var(--text-muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px dashed var(--line);}
.news-card__date{font-size:13px;color:var(--text-muted);}
.news-card__more{font-size:13px;font-weight:600;color:var(--brand-700);display:inline-flex;align-items:center;gap:4px;}
.news__more-wrap{display:flex;justify-content:center;margin-top:36px;}
.empty-state{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:280px;background:#fff;border:1px dashed var(--line);border-radius:var(--radius-card);color:var(--text-muted);font-size:15px;text-align:center;padding:32px;}
.empty-state svg{width:36px;height:36px;color:#B7B0C6;}
.empty-state a{color:var(--brand-700);font-weight:600;}

/* ---------- CTA 区块 ---------- */
.cta-block{background:var(--brand-900);border-radius:var(--radius-block);padding:56px;color:#fff;position:relative;overflow:hidden;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center;}
.cta-block::after{content:"";position:absolute;top:-40%;left:-10%;width:60%;height:180%;background:linear-gradient(100deg,rgba(255,255,255,.07),transparent 70%);transform:rotate(8deg);pointer-events:none;}
.cta-block__title{font-size:32px;line-height:1.35;font-weight:700;position:relative;}
@media(max-width:639px){.cta-block__title{font-size:23px;}}
.cta-block__sub{margin-top:12px;font-size:15px;line-height:1.85;color:#C9B8FF;position:relative;}
.cta-block__right{position:relative;display:flex;flex-direction:column;gap:16px;}
.cta-form{display:flex;gap:10px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius-btn);padding:8px;}
.cta-form input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:#fff;font-size:15px;padding:0 8px;height:40px;}
.cta-form input::placeholder{color:#A99BD6;}
.cta-block__btns{display:flex;gap:12px;flex-wrap:wrap;}
@media(max-width:1023px){
  .cta-block{grid-template-columns:1fr;padding:36px 24px;gap:26px;border-radius:20px;}
}
@media(max-width:639px){
  .cta-block{padding:32px 20px;}
  .cta-form{flex-direction:column;}
  .cta-block__btns .btn{width:100%;}
}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:box-shadow .2s var(--ease);}
.faq-item.is-open{box-shadow:var(--shadow-sm);border-color:rgba(94,46,214,.28);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;background:transparent;border:0;padding:18px 20px;font-size:16px;font-weight:600;color:var(--text);}
.faq-icon{width:24px;height:24px;flex:0 0 auto;border-radius:50%;background:rgba(94,46,214,.09);color:var(--brand-700);display:grid;place-items:center;font-size:16px;line-height:1;transition:transform .2s var(--ease);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand-600);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s var(--ease);}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--text-muted);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 0;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;}
@media(max-width:1023px){.footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}}
@media(max-width:639px){.footer__grid{grid-template-columns:1fr;gap:12px;}}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer__brand .brand__mark{box-shadow:none;}
.footer__brand-text{font-size:18px;font-weight:700;}
.footer__desc{font-size:14px;line-height:1.9;color:#B8AEE0;max-width:320px;}
.footer__domain{margin-top:14px;font-size:13px;color:#8E82BE;letter-spacing:.4px;}
.footer__col h3{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff;}
.footer__list li{margin-bottom:10px;}
.footer__list a{font-size:14px;color:#C9C0E4;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block;}
.footer__list a:hover{color:#C9B8FF;transform:translateX(2px);}
.footer__contact{font-size:14px;color:#C9C0E4;line-height:2;}
.footer__contact strong{color:#fff;font-weight:600;}
.footer-toggle{display:none;width:100%;align-items:center;justify-content:space-between;background:transparent;border:0;color:#fff;font-size:15px;font-weight:600;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.footer__col.is-collapsible .footer__body{display:block;}
@media(max-width:639px){
  .footer-toggle{display:flex;}
  .footer__col.is-collapsible .footer__body{display:none;}
  .footer__col.is-collapsible.is-open .footer__body{display:block;padding-top:14px;}
  .footer__col h3{display:none;}
}
.footer__bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8E82BE;}
.footer__bottom p{margin:0;}
.to-top{display:inline-flex;align-items:center;gap:6px;color:#C9C0E4;font-weight:600;}
.to-top:hover{color:#C9B8FF;}

/* roulang page: article */
:root{
  --brand-900:#170E2B;
  --brand-700:#4B21A8;
  --brand-600:#5E2ED6;
  --brand-500:#7A4DF0;
  --accent-600:#E8621A;
  --accent-500:#FF7A2F;
  --mint-500:#17C39A;
  --bg:#F7F5FC;
  --bg-warm:#FFF8F1;
  --surface:#FFFFFF;
  --text:#1C1526;
  --text-muted:#6A6279;
  --line:#E8E3F2;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(23,14,43,.05),0 2px 8px rgba(23,14,43,.05);
  --shadow-md:0 6px 20px rgba(23,14,43,.08);
  --shadow-lg:0 18px 40px rgba(23,14,43,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),transform .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;letter-spacing:.2px}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
::selection{background:rgba(94,46,214,.16)}
.num{font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:1024px){.container{padding-left:24px;padding-right:24px}}

/* ============ 顶部公告条 ============ */
.topbar{background:var(--brand-900);color:#EDE7FB;font-size:13px;line-height:1.6}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px}
.topbar__note{display:flex;align-items:center;gap:8px;margin:0}
.topbar__note::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500);flex:none}
.topbar__contact{margin:0;color:#BCB0DE;white-space:nowrap}
@media (max-width:767px){
  .topbar__note{font-size:12px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
  .topbar__contact{display:none}
}

/* ============ 导航 ============ */
.navbar{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.navbar.is-scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--line)}
.navbar__inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;color:#fff;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  box-shadow:0 4px 12px rgba(94,46,214,.28);
}
.brand__text{font-size:18px;font-weight:700;color:var(--brand-900);white-space:nowrap}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 14px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;color:var(--text);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:6px;height:2px;width:0;
  background:var(--brand-600);border-radius:2px;transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav__link:hover{color:var(--brand-700)}
.nav__link:hover::after{width:56%}
.nav__link.is-active{background:rgba(94,46,214,.08);color:var(--brand-700);font-weight:700}
.navbar__tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:4px;width:220px;height:40px;
  padding:0 6px 0 14px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-pill);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(122,77,240,.16)}
.search__input{flex:1;min-width:0;border:0;outline:none;background:transparent;font-size:14px;color:var(--text)}
.search__input::placeholder{color:#A49CB6}
.search__btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:50%;color:var(--brand-700);flex:none;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.search__btn:hover{background:rgba(94,46,214,.1)}
.hamburger{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  color:var(--brand-700);background:#fff;
}
.hamburger:hover{background:rgba(94,46,214,.06)}
@media (max-width:1023px){
  .nav,.search{display:none}
  .hamburger{display:inline-flex}
  .navbar__inner{height:60px}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;cursor:pointer;
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--accent-600);color:#fff;box-shadow:0 4px 14px rgba(232,98,26,.24)}
.btn--primary:hover{background:#CF5514;box-shadow:var(--shadow-md)}
.btn--ghost{background:#fff;color:var(--brand-700);border-color:rgba(94,46,214,.32)}
.btn--ghost:hover{background:rgba(94,46,214,.07);border-color:var(--brand-600)}
.btn--light{background:#fff;color:var(--brand-900);border-color:rgba(255,255,255,.4)}
.btn--light:hover{background:#F0EBFF}
.btn--sm{min-height:40px;padding:0 16px;font-size:14px}
.btn--block{width:100%}

/* ============ 移动端抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,14,43,.5);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;background:#fff;z-index:90;
  transform:translateX(105%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:20px 20px 28px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer__close{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);color:var(--brand-700)}
.drawer__search{display:flex;align-items:center;gap:8px;height:46px;padding:0 6px 0 16px;border:1px solid var(--line);border-radius:var(--radius-pill);margin-bottom:16px}
.drawer__search input{flex:1;min-width:0;border:0;outline:none;background:transparent;font-size:15px}
.drawer__nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer__link{display:flex;align-items:center;justify-content:space-between;min-height:56px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer__link:hover{color:var(--brand-700)}
.drawer__foot{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.drawer__info{font-size:13px;color:var(--text-muted);line-height:1.9}
@media (min-width:1024px){.drawer,.drawer-mask{display:none}}

/* ============ 面包屑 ============ */
.crumbs{padding:20px 0 0}
.crumbs__list{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--text-muted)}
.crumbs__list a:hover{color:var(--brand-700)}
.crumbs__sep{color:#C6BEDA}
.crumbs__current{max-width:min(560px,60vw);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;color:var(--text)}

/* ============ 文章头 ============ */
.article-hero{padding:24px 0 0;max-width:840px}
.article-hero__cat{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 14px;
  border-radius:var(--radius-pill);background:rgba(94,46,214,.08);color:var(--brand-700);
  font-size:13px;font-weight:600;
}
.article-hero__title{
  margin:16px 0 0;font-size:30px;line-height:1.32;font-weight:700;color:var(--brand-900);
  overflow-wrap:break-word;
}
@media (min-width:768px){.article-hero__title{font-size:38px}}
@media (min-width:1024px){.article-hero__title{font-size:42px;line-height:1.25}}
@media (max-width:639px){.article-hero__title{font-size:26px}}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:18px;font-size:14px;color:var(--text-muted)}
.article-meta__item{display:inline-flex;align-items:center;gap:6px}
.article-meta__item+.article-meta__item::before{content:"·";margin-right:6px;color:#C6BEDA}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 14px;
  border-radius:var(--radius-pill);border:1px solid var(--line);background:#fff;
  font-size:13px;font-weight:600;color:var(--brand-700);transition:all .2s var(--ease);
}
.share-btn:hover{background:rgba(94,46,214,.08);border-color:rgba(94,46,214,.3)}

/* ============ 封面 ============ */
.article-cover{
  max-width:840px;margin:28px 0 0;border-radius:var(--radius-card);overflow:hidden;
  aspect-ratio:16/9;background:linear-gradient(135deg,var(--brand-900),var(--brand-600));
  box-shadow:var(--shadow-sm);
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ============ 阅读区布局 ============ */
.article-layout{display:grid;grid-template-columns:1fr;gap:32px;padding:40px 0 0}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
}
.article-main{min-width:0;max-width:800px}
@media (min-width:1024px){.article-main{max-width:740px}}

/* ============ 正文排版 ============ */
.article-body{
  font-size:17px;line-height:1.95;color:var(--text);overflow-wrap:break-word;
}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  position:relative;margin:40px 0 20px;padding-left:14px;
  font-size:24px;line-height:1.4;font-weight:700;color:var(--brand-900);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;
  background:var(--brand-600);
}
.article-body h3{margin:28px 0 12px;font-size:20px;line-height:1.5;font-weight:600;color:var(--brand-900)}
.article-body h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--brand-700)}
.article-body ul{margin:0 0 1.15em}
.article-body ul>li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul>li::before{
  content:"";position:absolute;left:4px;top:.74em;width:6px;height:6px;border-radius:50%;
  background:var(--brand-600);
}
.article-body ol{margin:0 0 1.15em;padding-left:22px;list-style:decimal}
.article-body ol>li{margin-bottom:10px}
.article-body ol>li::marker{color:var(--brand-600);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand-600);
  background:#F3F0FB;border-radius:0 12px 12px 0;color:var(--text-muted);font-size:15px;line-height:1.9;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:20px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--text-muted)}
.article-body a{color:var(--brand-700);font-weight:600;border-bottom:1px solid rgba(75,33,168,.3)}
.article-body a:hover{border-bottom-color:var(--brand-700)}
.article-body table{
  display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;
  margin:24px 0;font-size:15px;
}
.article-body th{
  background:var(--brand-600);color:#fff;font-weight:600;text-align:left;
  padding:12px 16px;white-space:nowrap;
}
.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body tbody tr:nth-child(even){background:#F7F5FC}
.article-body code{background:#F3F0FB;padding:2px 6px;border-radius:6px;font-size:14px}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:320px;padding:48px 24px;text-align:center;
  background:#F3F0FB;border:1px dashed #D8D0EE;border-radius:var(--radius-card);
}
.empty-state__icon{width:48px;height:48px;color:#9C90C0}
.empty-state p{margin:0;font-size:16px;color:var(--text-muted)}

/* ============ 侧栏 ============ */
.side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){
  .side{position:sticky;top:96px}
}
.side__card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-sm);
}
.side__title{
  font-size:15px;font-weight:700;color:var(--brand-900);margin:0 0 14px;
  padding-left:10px;position:relative;line-height:1.5;
}
.side__title::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;border-radius:2px;
  background:var(--accent-600);
}
.side__nav li{margin-bottom:8px}
.side__nav a{
  display:block;padding:7px 12px;border-radius:8px;font-size:14px;color:var(--text-muted);
  border-left:3px solid transparent;transition:all .2s var(--ease);
}
.side__nav a:hover{background:#F7F5FC;color:var(--brand-700)}
.side__nav a.is-active{
  color:var(--brand-700);font-weight:700;background:#F7F5FC;border-left-color:var(--brand-600);
}
.side__links li{margin-bottom:10px}
.side__links a{display:block;font-size:14px;line-height:1.65;color:var(--text);transition:color .2s var(--ease)}
.side__links a:hover{color:var(--brand-700)}
.side__links span{display:block;margin-top:2px;font-size:12px;color:var(--text-muted)}
.side__card--cta{background:var(--brand-900);border-color:var(--brand-900)}
.side__card--cta .side__title{color:#fff}
.side__card--cta .side__title::before{background:var(--accent-500)}
.side__card--cta p{margin:0 0 16px;font-size:14px;line-height:1.8;color:#C7BCE8}

/* ============ 标签云 ============ */
.tagcloud{margin:44px 0 0;max-width:740px}
.tagcloud__title{font-size:15px;font-weight:700;color:var(--brand-900);margin-bottom:14px}
.tagcloud__list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--radius-pill);
  background:rgba(94,46,214,.08);color:var(--brand-700);font-size:13px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.tag:hover{background:rgba(94,46,214,.16);transform:translateY(-2px)}

/* ============ 上一篇 / 下一篇 ============ */
.pager{display:grid;grid-template-columns:1fr;gap:16px;margin:32px 0 0;max-width:740px}
@media (min-width:640px){.pager{grid-template-columns:1fr 1fr}}
.pager__card{
  display:block;padding:20px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.pager__card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(94,46,214,.28)}
.pager__label{display:block;font-size:12px;font-weight:700;letter-spacing:.6px;color:var(--accent-600);margin-bottom:8px}
.pager__title{display:block;font-size:16px;font-weight:600;line-height:1.55;color:var(--brand-900)}
.pager__desc{display:block;margin-top:6px;font-size:13px;color:var(--text-muted)}

/* ============ 相关推荐 ============ */
.related{margin:64px 0 0}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section__title{font-size:24px;line-height:1.4;font-weight:700;color:var(--brand-900)}
.section__sub{margin:8px 0 0;font-size:14px;color:var(--text-muted)}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-700);
  white-space:nowrap;
}
.link-more svg{transition:transform .2s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}
.related__grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.related__grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.related__grid{grid-template-columns:repeat(3,1fr)}}
.rcard{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.rcard__media{aspect-ratio:16/10;background:linear-gradient(135deg,var(--brand-900),var(--brand-600));overflow:hidden}
.rcard__media img{width:100%;height:100%;object-fit:cover}
.rcard__body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard__cat{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--radius-pill);background:rgba(23,195,154,.12);color:#0E8A6C;
  font-size:12px;font-weight:600;
}
.rcard__title{font-size:17px;font-weight:600;line-height:1.5;color:var(--brand-900)}
.rcard__desc{font-size:14px;line-height:1.7;color:var(--text-muted);flex:1}
.rcard__more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-700)}
.rcard:hover .rcard__more svg{transform:translateX(4px)}
.rcard__more svg{transition:transform .2s var(--ease)}

/* ============ 返回入口 ============ */
.back-entry{margin:64px 0 0}
.back-entry__inner{
  display:flex;flex-direction:column;gap:24px;
  padding:32px;border-radius:24px;background:var(--brand-900);color:#fff;
  background-image:linear-gradient(115deg,rgba(122,77,240,.22),rgba(23,14,43,0) 62%);
}
@media (min-width:768px){
  .back-entry__inner{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px}
}
.back-entry__title{font-size:24px;line-height:1.4;font-weight:700}
.back-entry__desc{margin:10px 0 0;font-size:15px;line-height:1.8;color:#C7BCE8;max-width:560px}
.back-entry__actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* ============ 页脚 ============ */
.site-footer{margin-top:88px;padding:64px 0 24px;background:var(--brand-900);color:#D9D2EC;font-size:14px}
.footer__grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:768px){.footer__grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px}}
.footer__brand{display:flex;align-items:center;gap:10px}
.footer__brand-text{font-size:18px;font-weight:700;color:#fff}
.footer__desc{margin:14px 0 0;line-height:1.85;color:#B6AAD6;max-width:320px}
.footer__domain{margin:10px 0 0;font-size:13px;color:#8E82B4}
.footer__col h3{font-size:15px;font-weight:700;color:#fff;margin:0 0 14px}
.footer__list li{margin-bottom:2px}
.footer__list a{display:inline-block;line-height:2.1;color:#D9D2EC}
.footer__list a:hover{color:#C9B8FF;transform:translateX(2px)}
.footer__contact p{margin:0 0 8px;line-height:1.8;color:#B6AAD6}
.footer__contact strong{color:#EDE7FB;font-weight:600}
.footer-toggle{display:none}
.footer__bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-direction:column;gap:6px;font-size:13px;color:#8E82B4;
}
@media (min-width:768px){
  .footer__bottom{flex-direction:row;align-items:center;justify-content:space-between}
}
@media (max-width:767px){
  .footer__col.is-collapsible .footer__body{display:none}
  .footer__col.is-collapsible.is-open .footer__body{display:block;margin-top:14px}
  .footer__col.is-collapsible .footer__body h3{display:none}
  .footer-toggle{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    min-height:48px;padding:0;color:#fff;font-size:15px;font-weight:700;
    border-bottom:1px solid rgba(255,255,255,.1);
  }
  .footer-toggle span{font-size:20px;line-height:1;color:#9A8DC2;transition:transform .2s var(--ease)}
  .footer__col.is-collapsible.is-open .footer-toggle span{transform:rotate(45deg)}
}
.to-top{
  position:fixed;right:16px;bottom:24px;z-index:70;width:46px;height:46px;border-radius:14px;
  display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--brand-700);
  border:1px solid var(--line);box-shadow:var(--shadow-md);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

/* roulang page: category1 */
:root{
    --brand-900:#170E2B;
    --brand-700:#4B21A8;
    --brand-600:#5E2ED6;
    --brand-500:#7A4DF0;
    --accent-600:#E8621A;
    --accent-500:#FF7A2F;
    --mint-500:#17C39A;
    --bg:#F7F5FC;
    --bg-warm:#FFF8F1;
    --surface:#FFFFFF;
    --text:#1C1526;
    --text-muted:#6A6279;
    --line:#E8E3F2;
    --radius-card:16px;
    --radius-btn:10px;
    --radius-lg:24px;
    --shadow-sm:0 1px 2px rgba(23,14,43,.05),0 2px 8px rgba(23,14,43,.05);
    --shadow-md:0 6px 20px rgba(23,14,43,.08);
    --shadow-lg:0 18px 40px rgba(23,14,43,.12);
    --ease:cubic-bezier(.2,.8,.2,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body.site-body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul,ol{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:8px;}
  .container-x{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
  @media (min-width:1024px){.container-x{padding-left:24px;padding-right:24px;}}
  .num{font-variant-numeric:tabular-nums;}

  /* ---------- 顶部公告条 ---------- */
  .topbar{background:var(--brand-900);color:#fff;font-size:13px;line-height:1.7;}
  .topbar__inner{display:flex;align-items:center;justify-content:space-between;height:34px;gap:12px;}
  .topbar__note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .topbar__contact{display:none;white-space:nowrap;color:#D8CCFF;}
  @media (min-width:768px){.topbar__contact{display:block;}}

  /* ---------- 头部与导航 ---------- */
  .site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .2s var(--ease),border-color .2s var(--ease);}
  .site-header.is-scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--line);}
  .site-header__inner{display:flex;align-items:center;gap:14px;height:60px;}
  @media (min-width:1024px){.site-header__inner{height:68px;gap:22px;}}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand__mark{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(140deg,var(--brand-600),var(--brand-900));}
  .brand__text{font-size:17px;font-weight:700;letter-spacing:.01em;}
  .nav{display:none;}
  @media (min-width:1024px){.nav{display:flex;align-items:center;gap:4px;}}
  .nav__link{position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;border-radius:999px;font-size:15px;font-weight:600;color:var(--text);transition:background .2s var(--ease),color .2s var(--ease);}
  .nav__link::after{content:"";position:absolute;left:14px;right:14px;bottom:7px;height:2px;border-radius:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:center;transition:transform .2s var(--ease);}
  .nav__link:hover{color:var(--brand-700);}
  .nav__link:hover::after{transform:scaleX(1);}
  .nav__link.is-active{background:rgba(94,46,214,.08);color:var(--brand-700);}
  .nav__link.is-active::after{transform:scaleX(1);}
  .header__actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
  .search-pill{display:none;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:999px;background:var(--bg);border:1px solid var(--line);width:220px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
  @media (min-width:1180px){.search-pill{display:flex;}}
  .search-pill:focus-within{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(94,46,214,.12);}
  .search-pill input{flex:1;min-width:0;border:0;outline:none;background:transparent;font-size:14px;color:var(--text);}
  .search-pill svg{flex:0 0 auto;color:var(--text-muted);}
  .header__cta{display:none;}
  @media (min-width:640px){.header__cta{display:inline-flex;}}
  .hamburger{width:44px;height:44px;border-radius:12px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:1px solid var(--line);background:#fff;transition:background .2s var(--ease),border-color .2s var(--ease);}
  .hamburger:hover{background:var(--bg);border-color:var(--brand-500);}
  .hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);}
  @media (min-width:1024px){.hamburger{display:none;}}

  /* ---------- 按钮 ---------- */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);}
  .btn--accent{background:var(--accent-600);color:#fff;box-shadow:var(--shadow-sm);}
  .btn--accent:hover{background:#cf5413;box-shadow:var(--shadow-md);}
  .btn--accent:active{transform:translateY(1px);}
  .btn--outline{background:#fff;border-color:var(--brand-600);color:var(--brand-700);}
  .btn--outline:hover{background:rgba(94,46,214,.07);box-shadow:var(--shadow-md);}
  .btn--outline:active{transform:translateY(1px);}
  .btn--light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff;}
  .btn--light:hover{background:rgba(255,255,255,.14);}
  .btn--block{width:100%;}
  .text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-700);}
  .text-link span{transition:transform .2s var(--ease);}
  .text-link:hover span{transform:translateX(4px);}

  /* ---------- 抽屉 ---------- */
  .drawer-mask{position:fixed;inset:0;background:rgba(23,14,43,.5);opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);z-index:60;}
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .drawer{position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;background:#fff;z-index:70;padding:20px;overflow-y:auto;transform:translateX(100%);transition:transform .28s var(--ease);box-shadow:var(--shadow-lg);}
  .drawer.is-open{transform:translateX(0);}
  .drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
  .drawer__title{font-size:17px;font-weight:700;}
  .drawer__close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-muted);}
  .drawer__close:hover{background:var(--bg);color:var(--text);}
  .drawer__search{margin-top:16px;}
  .drawer__nav{margin-top:8px;}
  .drawer__nav a{display:flex;align-items:center;justify-content:space-between;height:56px;font-weight:600;border-bottom:1px solid var(--line);color:var(--text);transition:color .2s var(--ease);}
  .drawer__nav a:hover{color:var(--brand-700);}
  .drawer__nav a.is-active{color:var(--brand-700);}
  .drawer__nav small{font-size:13px;font-weight:400;color:var(--text-muted);}
  .drawer__cta{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
  .drawer__contact{margin-top:24px;padding:16px;border-radius:var(--radius-card);background:var(--bg);border:1px solid var(--line);font-size:14px;color:var(--text-muted);}
  .drawer__contact p{margin:0 0 8px;}
  .drawer__contact p:last-child{margin-bottom:0;}

  /* ---------- 面包屑 ---------- */
  .crumb{padding:16px 0 0;font-size:14px;color:var(--text-muted);}
  .crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;}
  .crumb li{display:flex;align-items:center;gap:6px;min-width:0;}
  .crumb a{color:var(--text-muted);transition:color .2s var(--ease);}
  .crumb a:hover{color:var(--brand-700);}
  .crumb__sep{color:#C3BCD2;}
  .crumb__current{color:var(--text);font-weight:600;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

  /* ---------- 内页 Hero ---------- */
  .page-hero{padding:32px 0 48px;background:radial-gradient(900px 420px at 82% -12%,rgba(122,77,240,.14),transparent 62%),var(--bg);}
  @media (min-width:1024px){.page-hero{padding:48px 0 72px;}}
  .page-hero__grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;}
  @media (min-width:1024px){.page-hero__grid{grid-template-columns:1.05fr .95fr;gap:48px;}}
  .pill{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;border-radius:999px;background:rgba(94,46,214,.1);color:var(--brand-700);font-size:13px;font-weight:600;}
  .page-hero h1{margin:16px 0 0;font-size:28px;line-height:1.28;font-weight:700;letter-spacing:-.01em;}
  @media (min-width:1024px){.page-hero h1{font-size:44px;}}
  .page-hero__lead{margin:18px 0 0;font-size:16px;line-height:1.9;color:var(--text-muted);max-width:640px;}
  .page-hero__cta{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}
  .page-hero__cta .btn{flex:1 1 200px;}
  @media (min-width:640px){.page-hero__cta .btn{flex:0 0 auto;}}
  .hero-stats{margin-top:32px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding-top:24px;border-top:1px solid var(--line);}
  @media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}}
  .hero-stats__item strong{display:block;font-size:22px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;}
  .hero-stats__item span{font-size:13px;color:var(--text-muted);}
  .page-hero__media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:5/4;background:linear-gradient(150deg,var(--brand-900),var(--brand-600));}
  .page-hero__media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
  .page-hero__media::after{content:"";position:absolute;inset:0;background:rgba(94,46,214,.06);pointer-events:none;}

  /* ---------- 吸顶锚点胶囊条 ---------- */
  .anchor-bar{position:sticky;top:60px;z-index:30;background:rgba(247,245,252,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
  @media (min-width:1024px){.anchor-bar{top:68px;}}
  .anchor-bar__inner{display:flex;align-items:center;gap:10px;height:52px;overflow-x:auto;scroll-snap-type:x mandatory;-ms-overflow-style:none;scrollbar-width:none;}
  .anchor-bar__inner::-webkit-scrollbar{display:none;}
  .anchor-pill{flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;background:#fff;border:1px solid var(--brand-600);color:var(--brand-700);font-size:14px;font-weight:600;scroll-snap-align:start;transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);}
  .anchor-pill:hover{background:rgba(94,46,214,.08);box-shadow:var(--shadow-sm);}
  .anchor-pill.is-current{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm);}

  /* ---------- 通用板块 ---------- */
  .section{padding:48px 0;}
  @media (min-width:1024px){.section{padding:80px 0;}}
  .section--tight{padding:40px 0 0;}
  .section-head{max-width:720px;margin-bottom:32px;}
  .section-head h2{margin:0;font-size:23px;line-height:1.35;font-weight:700;letter-spacing:-.01em;}
  @media (min-width:1024px){.section-head h2{font-size:32px;}}
  .section-head p{margin:12px 0 0;font-size:15px;color:var(--text-muted);}
  .eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand-700);letter-spacing:.04em;text-transform:uppercase;}
  .eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--brand-600);}
  section[id]{scroll-margin-top:130px;}

  /* ---------- 交错图文 ---------- */
  .feat-row{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;margin-bottom:40px;}
  .feat-row:last-child{margin-bottom:0;}
  @media (min-width:900px){
    .feat-row{grid-template-columns:1fr 1fr;gap:48px;margin-bottom:56px;}
    .feat-row--flip .feat-row__media{order:2;}
  }
  .feat-row__media{border-radius:var(--radius-card);overflow:hidden;aspect-ratio:5/4;background:linear-gradient(150deg,var(--brand-900),var(--brand-600));box-shadow:var(--shadow-md);}
  .feat-row__media img{width:100%;height:100%;object-fit:cover;}
  .feat-row__body h3{margin:0;font-size:20px;line-height:1.5;font-weight:600;}
  .feat-row__body p{margin:14px 0 0;font-size:16px;line-height:1.9;color:var(--text-muted);}
  .check-list{margin-top:18px;display:grid;gap:10px;}
  .check-list li{position:relative;padding-left:24px;font-size:15px;color:var(--text);}
  .check-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--brand-500);}
  .check-list li em{font-style:normal;color:var(--text-muted);}

  /* ---------- 卡片网格（不等宽） ---------- */
  .tier-grid{display:grid;grid-template-columns:1fr;gap:20px;}
  @media (min-width:768px){.tier-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
  @media (min-width:1024px){
    .tier-grid{grid-template-columns:repeat(10,minmax(0,1fr));gap:24px;}
    .tier-card--wide{grid-column:span 6;}
    .tier-card--narrow{grid-column:span 4;}
  }
  .tier-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);}
  .tier-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#DCD4EE;}
  .tier-card__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:linear-gradient(150deg,var(--brand-900),var(--brand-600));}
  .tier-card__media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
  .tier-card:hover .tier-card__media img{transform:scale(1.04);}
  .badge{position:absolute;top:12px;left:12px;z-index:2;display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:600;color:#fff;letter-spacing:.02em;}
  .badge--hot{background:var(--accent-600);}
  .badge--new{background:var(--mint-500);}
  .badge--limit{background:var(--brand-600);}
  .tier-card__body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1;}
  .tier-card__body h3{margin:0;font-size:17px;line-height:1.5;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .tier-card__desc{margin:0;font-size:14px;line-height:1.75;color:var(--text-muted);}
  .tier-card__points{display:grid;gap:8px;font-size:14px;color:var(--text);}
  .tier-card__points li{position:relative;padding-left:18px;}
  .tier-card__points li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);}
  .tier-card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:16px;border-top:1px solid var(--line);}
  .price{font-size:20px;font-weight:700;color:var(--accent-600);font-variant-numeric:tabular-nums;}
  .price small{font-size:12px;font-weight:400;color:var(--text-muted);margin-left:4px;}
  .chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;background:rgba(94,46,214,.08);color:var(--brand-700);font-size:13px;font-weight:600;transition:background .2s var(--ease);}
  .chip:hover{background:rgba(94,46,214,.16);}

  /* ---------- 对比表 ---------- */
  .table-wrap{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);}
  table.cmp{width:100%;border-collapse:collapse;font-size:15px;}
  table.cmp caption{text-align:left;padding:20px 20px 0;font-size:14px;color:var(--text-muted);}
  table.cmp th,table.cmp td{padding:16px 20px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);}
  table.cmp thead th{background:var(--brand-700);color:#fff;font-weight:600;font-size:14px;border-bottom-color:transparent;}
  table.cmp tbody tr:nth-child(even){background:#FAF8FE;}
  table.cmp tbody tr:last-child td{border-bottom:0;}
  table.cmp td:first-child{font-weight:600;}
  table.cmp .num{font-weight:600;color:var(--accent-600);}
  @media (max-width:767px){
    .table-wrap{border:0;border-radius:0;box-shadow:none;background:transparent;}
    table.cmp caption{padding:0 0 12px;}
    table.cmp,table.cmp tbody,table.cmp tr,table.cmp td{display:block;width:100%;}
    table.cmp thead{display:none;}
    table.cmp tr{background:var(--surface)!important;border:1px solid var(--line);border-radius:var(--radius-card);padding:8px 4px;margin-bottom:16px;box-shadow:var(--shadow-sm);}
    table.cmp td{border-bottom:1px dashed var(--line);display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:12px 16px;}
    table.cmp tr td:last-child{border-bottom:0;}
    table.cmp td::before{content:attr(data-label);flex:0 0 auto;font-size:13px;font-weight:600;color:var(--text-muted);}
    table.cmp td>*{text-align:right;}
    table.cmp td:first-child{font-size:16px;}
  }

  /* ---------- 深色 CTA ---------- */
  .cta-band{position:relative;overflow:hidden;background:var(--brand-900);border-radius:var(--radius-lg);padding:32px;color:#fff;box-shadow:var(--shadow-lg);}
  .cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 38%,rgba(255,255,255,.07) 50%,transparent 62%);pointer-events:none;}
  @media (min-width:1024px){.cta-band{padding:56px;display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center;}}
  .cta-band h2{position:relative;z-index:2;margin:0;font-size:23px;line-height:1.4;font-weight:700;}
  @media (min-width:1024px){.cta-band h2{font-size:30px;}}
  .cta-band p{position:relative;z-index:2;margin:14px 0 0;font-size:15px;line-height:1.85;color:#C9C0E4;max-width:560px;}
  .cta-band__actions{position:relative;z-index:2;margin-top:24px;display:flex;flex-direction:column;gap:12px;}
  @media (min-width:640px){.cta-band__actions{flex-direction:row;flex-wrap:wrap;}}
  .cta-band__form{position:relative;z-index:2;display:flex;align-items:center;gap:8px;height:52px;padding:0 8px 0 16px;border-radius:12px;background:#fff;}
  .cta-band__form input{flex:1;min-width:0;border:0;outline:none;font-size:15px;color:var(--text);background:transparent;}
  .cta-band__form button{height:40px;padding:0 18px;border-radius:10px;background:var(--accent-600);color:#fff;font-weight:600;font-size:14px;transition:background .2s var(--ease);}
  .cta-band__form button:hover{background:#cf5413;}
  .cta-band__hint{position:relative;z-index:2;margin-top:12px;font-size:13px;color:#A79CC9;}

  /* ---------- FAQ ---------- */
  .faq{max-width:840px;margin:0 auto;display:grid;gap:12px;}
  .faq__item{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
  .faq__item.is-open{border-color:#D6CBEF;box-shadow:var(--shadow-sm);}
  .faq__btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--text);}
  .faq__btn:hover{color:var(--brand-700);}
  .faq__icon{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .2s var(--ease);}
  .faq__icon::before,.faq__icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;transform:translate(-50%,-50%);}
  .faq__icon::before{width:14px;height:2px;}
  .faq__icon::after{width:2px;height:14px;}
  .faq__item.is-open .faq__icon{transform:rotate(45deg);}
  .faq__panel{max-height:0;overflow:hidden;transition:max-height .2s var(--ease);}
  .faq__panel p{margin:0;padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--text-muted);}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--brand-900);color:#EDE9F7;padding:56px 0 24px;margin-top:64px;}
  @media (min-width:1024px){.site-footer{padding:72px 0 28px;}}
  .footer__grid{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:1024px){.footer__grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}}
  .footer__brand{display:flex;align-items:center;gap:10px;}
  .footer__brand .brand__mark{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;color:#fff;}
  .footer__brand-text{font-size:17px;font-weight:700;color:#fff;}
  .footer__desc{margin:16px 0 0;font-size:14px;line-height:1.85;color:#B6ABD2;max-width:360px;}
  .footer__domain{margin:12px 0 0;font-size:13px;color:#8F84B4;}
  .footer__col h3{margin:0 0 16px;font-size:15px;font-weight:600;color:#fff;}
  .footer__list{display:grid;gap:10px;}
  .footer__list a{font-size:14px;color:#C9C0E4;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block;}
  .footer__list a:hover{color:#C9B8FF;transform:translateX(2px);}
  .footer__contact p{margin:0 0 10px;font-size:14px;color:#C9C0E4;}
  .footer__contact p:last-child{margin-bottom:0;}
  .footer__contact strong{color:#fff;font-weight:600;}
  .footer-toggle{display:none;}
  @media (max-width:1023px){
    .footer-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;height:52px;font-size:15px;font-weight:600;color:#fff;border-bottom:1px solid rgba(255,255,255,.12);}
    .footer-toggle span{font-size:18px;color:#B6ABD2;transition:transform .2s var(--ease);}
    .footer__col.is-collapsible.is-open .footer-toggle span{transform:rotate(45deg);}
    .footer__col.is-collapsible .footer__body{max-height:0;overflow:hidden;transition:max-height .25s var(--ease);}
    .footer__col.is-collapsible.is-open .footer__body{max-height:420px;}
    .footer__col.is-collapsible .footer__body h3{display:none;}
    .footer__col.is-collapsible .footer__body > *:first-child{margin-top:14px;}
  }
  .footer__bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:grid;gap:8px;font-size:13px;color:#8F84B4;}
  @media (min-width:1024px){.footer__bottom{grid-template-columns:auto 1fr;gap:24px;align-items:center;}}

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

/* roulang page: category2 */
:root{
  --brand-900:#170E2B;
  --brand-700:#4B21A8;
  --brand-600:#5E2ED6;
  --brand-500:#7A4DF0;
  --accent-600:#E8621A;
  --accent-500:#FF7A2F;
  --mint-500:#17C39A;
  --bg:#F7F5FC;
  --bg-warm:#FFF8F1;
  --surface:#FFFFFF;
  --text:#1C1526;
  --text-muted:#6A6279;
  --line:#E8E3F2;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-block:24px;
  --shadow-sm:0 1px 2px rgba(23,14,43,.05),0 2px 8px rgba(23,14,43,.05);
  --shadow-md:0 6px 20px rgba(23,14,43,.08);
  --shadow-lg:0 18px 40px rgba(23,14,43,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0 !important;
  background-color:var(--bg) !important;
  color:var(--text) !important;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif !important;
  font-size:16px !important;
  line-height:1.85 !important;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:1024px){.container{padding:0 24px}}
.num{font-variant-numeric:tabular-nums}

/* ============ 顶部公告条 ============ */
.topbar{background:var(--brand-900);color:#E8E2FA;font-size:13px;line-height:1.6}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px;padding-top:4px;padding-bottom:4px}
.topbar__note{display:flex;align-items:center;gap:8px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.topbar__note i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--mint-500);flex:none}
.topbar__contact{white-space:nowrap;color:#C9B8FF}
@media (max-width:767px){.topbar__contact{display:none}}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .2s var(--ease),border-color .2s var(--ease)}
.site-header.is-scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--line)}
.header__inner{display:flex;align-items:center;gap:20px;height:60px}
@media (min-width:1024px){.header__inner{height:68px;gap:24px}}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand__mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand-600),var(--brand-500));color:#fff;display:grid;place-items:center;box-shadow:0 4px 12px rgba(94,46,214,.28)}
.brand__text{font-size:17px;font-weight:700;letter-spacing:.2px;color:var(--brand-900);white-space:nowrap}
@media (min-width:1024px){.brand__text{font-size:18px}}
.nav{display:none;align-items:center;gap:2px;margin:0 auto}
@media (min-width:1024px){.nav{display:flex}}
.nav__link{position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:999px;font-size:15px;font-weight:600;color:var(--text);transition:color .2s var(--ease),background-color .2s var(--ease)}
.nav__link::after{content:"";position:absolute;left:50%;bottom:3px;width:0;height:2px;border-radius:2px;background:var(--brand-600);transform:translateX(-50%);transition:width .22s var(--ease)}
.nav__link:hover{color:var(--brand-700)}
.nav__link:hover::after{width:calc(100% - 30px)}
.nav__link.is-active{background:rgba(94,46,214,.08);color:var(--brand-700);font-weight:700}
.nav__link.is-active::after{width:0}
.header__actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.header__search{display:none;position:relative}
@media (min-width:1024px){.header__search{display:block}}
.header__search input{width:220px;height:40px;border-radius:999px;border:1px solid var(--line);background:#F7F5FC;padding:0 42px 0 16px;font-size:14px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease)}
.header__search input::placeholder{color:#9A93AA}
.header__search input:focus{outline:none;border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 3px rgba(122,77,240,.16)}
.header__search button{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:50%;display:grid;place-items:center;color:var(--brand-600)}
.header__search button:hover{background:rgba(94,46,214,.1)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease),transform .12s var(--ease),border-color .2s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--accent-500);color:#fff;box-shadow:0 4px 14px rgba(232,98,26,.26)}
.btn--primary:hover{background:var(--accent-600);box-shadow:var(--shadow-md)}
.btn--ghost{background:#fff;border-color:var(--brand-600);color:var(--brand-700)}
.btn--ghost:hover{background:rgba(94,46,214,.07)}
.btn--light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn--light:hover{background:rgba(255,255,255,.12)}
.btn--sm{height:40px;padding:0 16px;font-size:14px}
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0 10px;border-radius:10px;border:1px solid var(--line);background:#fff}
.burger span{display:block;height:2px;border-radius:2px;background:var(--brand-900);transition:transform .2s var(--ease)}
.burger:hover{background:#F7F5FC}
@media (min-width:1024px){.burger{display:none}}

/* ============ 移动抽屉 ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(23,14,43,.5);opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s;z-index:60}
.drawer{position:fixed;top:0;right:0;height:100%;width:88%;max-width:360px;background:#fff;z-index:61;padding:20px;overflow-y:auto;transform:translateX(102%);transition:transform .28s var(--ease)}
body.drawer-open{overflow:hidden}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .drawer{transform:none}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer__close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;font-size:20px;color:var(--brand-700)}
.drawer__search{display:flex;align-items:center;height:44px;border-radius:10px;border:1px solid var(--line);background:#F7F5FC;padding:0 12px;gap:8px;margin-bottom:16px}
.drawer__search input{flex:1;border:0;background:transparent;font-size:14px;outline:none;min-width:0}
.drawer__nav{display:block}
.drawer__nav a{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);font-size:16px;font-weight:600}
.drawer__nav a.is-active{color:var(--brand-700)}
.drawer__nav a span{color:var(--brand-500)}
.drawer__cta{margin-top:20px;display:grid;gap:12px}
.drawer__contact{margin-top:24px;font-size:13px;color:var(--text-muted);line-height:1.9}

/* ============ 面包屑 ============ */
.crumb{padding:18px 0 0}
.crumb__inner{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;color:var(--text-muted)}
.crumb__inner a{color:var(--text-muted)}
.crumb__inner a:hover{color:var(--brand-700)}
.crumb__sep{color:#BDB6CC}
.crumb__current{color:var(--text);font-weight:600;max-width:62%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}

/* ============ 内页 Hero ============ */
.page-hero{padding:28px 0 48px;background:radial-gradient(900px 380px at 12% 0%,rgba(122,77,240,.10),transparent 70%),linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%)}
.page-hero__inner{display:grid;gap:32px;align-items:center}
@media (min-width:1024px){.page-hero__inner{grid-template-columns:1.08fr .92fr;gap:48px}.page-hero{padding:40px 0 64px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(94,46,214,.09);color:var(--brand-700);font-size:13px;font-weight:600}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-500)}
.page-hero h1{margin-top:18px;font-size:30px;line-height:1.28;font-weight:700;letter-spacing:-.2px;color:var(--brand-900)}
@media (min-width:1024px){.page-hero h1{font-size:44px}}
.lead{margin-top:16px;font-size:16px;line-height:1.9;color:var(--text-muted);max-width:36em}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
.hero-stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 12px;box-shadow:var(--shadow-sm)}
.hero-stat b{display:block;font-size:18px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums}
.hero-stat span{display:block;margin-top:2px;font-size:13px;color:var(--text-muted);line-height:1.6}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
@media (max-width:639px){.hero-actions .btn{width:100%}}
.page-hero__media{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg)}
.page-hero__media img{width:100%;aspect-ratio:5/4;object-fit:cover}
.page-hero__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(23,14,43,0) 55%,rgba(23,14,43,.34) 100%)}
.page-hero__tag{position:absolute;left:16px;bottom:16px;z-index:2;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.92);color:var(--brand-900);font-size:13px;font-weight:600}

/* ============ 吸顶锚点胶囊条 ============ */
.anchorbar{position:sticky;top:60px;z-index:40;background:rgba(247,245,252,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
@media (min-width:1024px){.anchorbar{top:68px}}
.anchorbar__inner{display:flex;gap:10px;overflow-x:auto;padding:10px 0;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}
.anchorbar__inner::-webkit-scrollbar{height:0}
.anchor-pill{flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;border:1px solid var(--brand-600);background:#fff;color:var(--brand-700);font-size:14px;font-weight:600;white-space:nowrap;scroll-snap-align:start;transition:background-color .2s var(--ease),color .2s var(--ease),transform .12s var(--ease)}
.anchor-pill:hover{background:rgba(94,46,214,.07)}
.anchor-pill.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}

/* ============ 主体：窄栏 + 粘性目录 ============ */
.guide{padding:56px 0 72px}
.guide__grid{display:grid;gap:36px}
@media (min-width:1024px){.guide__grid{grid-template-columns:minmax(0,760px) 268px;justify-content:space-between;gap:48px}}
.guide__main{min-width:0}
[id]{scroll-margin-top:140px}
.block{margin-bottom:56px}
.block > h2{position:relative;padding-left:18px;font-size:22px;line-height:1.4;font-weight:700;color:var(--brand-900)}
@media (min-width:1024px){.block > h2{font-size:28px}}
.block > h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:3px;background:linear-gradient(180deg,var(--brand-600),var(--brand-500))}
.block p{margin-top:18px;font-size:16px;line-height:1.95;color:#2C2538}
.checks{margin-top:18px}
.checks li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15.5px;line-height:1.85;color:#3A3346}
.checks li:last-child{margin-bottom:0}
.checks li::before{content:"";position:absolute;left:8px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand-600)}
.checks li b{color:var(--brand-700)}
.steps{position:relative;margin-top:26px}
.steps::before{content:"";position:absolute;left:19px;top:10px;bottom:10px;width:2px;background:linear-gradient(180deg,#D8CCFA,#EFE9FB)}
.step{position:relative;padding-left:58px;margin-bottom:24px}
.step:last-child{margin-bottom:0}
.step__num{position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;background:var(--brand-600);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700;box-shadow:0 0 0 6px #F3F0FB;font-variant-numeric:tabular-nums}
.step h3{margin:6px 0 6px;font-size:17px;font-weight:600;color:var(--brand-900)}
.step p{margin:0;font-size:15px;line-height:1.85;color:var(--text-muted)}
.tiles{display:grid;gap:16px;margin-top:22px}
@media (min-width:640px){.tiles{grid-template-columns:repeat(3,minmax(0,1fr))}}
.tile{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.tile h3{font-size:16px;font-weight:600;color:var(--brand-900);margin-bottom:8px}
.tile p{margin:0;font-size:14px;line-height:1.8;color:var(--text-muted)}
.quote{margin-top:22px;border-left:3px solid var(--brand-500);background:#F5F2FE;border-radius:0 12px 12px 0;padding:16px 20px;font-size:15px;line-height:1.9;color:#4A4358}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);padding:20px}
.toc h2{font-size:15px;font-weight:700;color:var(--brand-900);margin-bottom:12px}
.toc__list a{display:block;padding:9px 12px;border-left:2px solid transparent;border-radius:8px;font-size:14px;color:var(--text-muted);transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease)}
.toc__list a:hover{color:var(--brand-700);background:rgba(94,46,214,.06)}
.toc__list a.is-active{color:var(--brand-700);font-weight:700;border-left-color:var(--brand-600);background:rgba(94,46,214,.07)}
.guide__aside{display:grid;gap:20px;align-content:start}
@media (min-width:1024px){.guide__aside{position:sticky;top:148px}}
.aside-cta{background:var(--brand-900);color:#fff;border-radius:var(--radius-card);padding:22px}
.aside-cta h3{font-size:16px;font-weight:600;margin-bottom:8px}
.aside-cta p{font-size:13.5px;line-height:1.8;color:#C6BCE6;margin-bottom:16px}
.aside-cta .btn{width:100%}

/* ============ 关联内容卡 ============ */
.related{padding:0 0 72px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:26px}
.sec-head h2{font-size:24px;font-weight:700;color:var(--brand-900)}
@media (min-width:1024px){.sec-head h2{font-size:30px}}
.sec-head p{margin-top:8px;font-size:15px;color:var(--text-muted)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-700)}
.link-more span{transition:transform .2s var(--ease)}
.link-more:hover span{transform:translateX(4px)}
.related__grid{display:grid;gap:20px}
@media (min-width:640px){.related__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.related__grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.rcard__media{position:relative}
.rcard__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.rcard__badge{position:absolute;left:12px;top:12px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;color:#fff;background:var(--accent-500)}
.rcard__badge--mint{background:var(--mint-500)}
.rcard__body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard__body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--brand-900)}
.rcard__body p{font-size:14px;line-height:1.75;color:var(--text-muted)}
.rcard__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#9A93AA}

/* ============ CTA ============ */
.cta-wrap{padding:0 0 80px}
.cta{position:relative;overflow:hidden;background:var(--brand-900);color:#fff;border-radius:var(--radius-block);padding:32px}
@media (min-width:1024px){.cta{padding:56px}}
.cta::after{content:"";position:absolute;top:-40%;right:-10%;width:60%;height:180%;background:linear-gradient(100deg,rgba(122,77,240,.16),rgba(232,98,26,.10));transform:rotate(12deg);pointer-events:none}
.cta__grid{position:relative;z-index:2;display:grid;gap:28px}
@media (min-width:1024px){.cta__grid{grid-template-columns:1.15fr 1fr;align-items:center;gap:40px}}
.cta h2{font-size:24px;line-height:1.35;font-weight:700;color:#fff}
@media (min-width:1024px){.cta h2{font-size:32px}}
.cta p{margin-top:14px;font-size:15px;line-height:1.9;color:#CFC5EE}
.cta__form{display:flex;flex-wrap:wrap;gap:12px}
.cta__form input{flex:1 1 200px;min-width:0;height:44px;border-radius:var(--radius-btn);border:1px solid rgba(255,255,255,.26);background:rgba(255,255,255,.09);color:#fff;padding:0 14px;font-size:14px}
.cta__form input::placeholder{color:rgba(255,255,255,.56)}
.cta__form input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(122,77,240,.3)}
.cta__hint{margin-top:12px;font-size:13px;color:#B7ACDC}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:#D8D2EA;padding:56px 0 0;font-size:14px}
.footer__grid{display:grid;gap:28px}
@media (min-width:1024px){.footer__grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer__brand-text{font-size:17px;font-weight:700;color:#fff}
.footer__desc{line-height:1.9;color:#B9B0D6}
.footer__domain{margin-top:12px;font-size:13px;color:#8E85AE}
.footer__col h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.footer__list li{margin-bottom:10px}
.footer__list a{color:#D8D2EA;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.footer__list a:hover{color:#C9B8FF;transform:translateX(2px)}
.footer__contact p{margin-bottom:10px;line-height:1.8;color:#B9B0D6}
.footer__contact strong{color:#EDE8FA;font-weight:600}
.footer-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;height:48px;font-size:15px;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-toggle span{font-size:18px;font-weight:400;color:#C9B8FF;transition:transform .2s var(--ease)}
.footer__col.is-open .footer-toggle span{transform:rotate(45deg)}
.footer__body{display:none;padding-top:14px}
.footer__col.is-open .footer__body{display:block}
@media (min-width:1024px){
  .footer-toggle{display:none}
  .footer__body{display:block !important;padding-top:0}
}
.footer__bottom{margin-top:40px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;font-size:13px;color:#8E85AE;line-height:1.9}
.footer__bottom p + p{margin-top:6px}