/* roulang page: index */
:root{
  --berry:#5B2E9E;
  --berry-deep:#3E1F70;
  --berry-light:#8B5CF6;
  --mint:#12C79A;
  --bg:#F7F5FA;
  --surface:#FFFFFF;
  --dark:#17121F;
  --ink:#1B1626;
  --muted:#6B6478;
  --line:rgba(27,22,38,.08);
  --line-strong:rgba(27,22,38,.14);
  --r-card:16px;
  --r-img:12px;
  --shadow-xs:0 1px 2px rgba(27,22,38,.04);
  --shadow-lg:0 14px 34px -14px rgba(91,46,158,.28);
  --grad:linear-gradient(92deg,#5B2E9E 0%,#8B5CF6 52%,#12C79A 118%);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:16.5px;line-height:1.75;
  color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-family:var(--font);line-height:1.22;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--berry-light);outline-offset:3px;border-radius:8px}
::selection{background:rgba(91,46,158,.18)}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background-image:var(--grad);
  transition:box-shadow .3s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(62,31,112,.18)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;letter-spacing:.01em;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.3);display:grid;place-items:center;flex:0 0 auto;
  transition:background .25s ease,transform .25s ease;
}
.brand:hover .brand-mark{background:rgba(255,255,255,.26);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:inline-block;padding:9px 14px;border-radius:999px;
  color:rgba(255,255,255,.82);font-size:15px;font-weight:500;
  transition:color .22s ease,background .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:#fff;border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .28s cubic-bezier(.4,0,.2,1);
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.14)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:600;background:rgba(255,255,255,.14)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:10px}
.btn-cta{
  display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:999px;
  background:var(--mint);color:#10201B;font-weight:700;font-size:15px;white-space:nowrap;
  box-shadow:0 6px 18px -8px rgba(18,199,154,.75);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn-cta:hover{transform:translateY(-1px);background:#0FB68C;box-shadow:0 10px 24px -10px rgba(18,199,154,.9)}
.btn-cta:active{transform:translateY(0)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.3);
  background:rgba(255,255,255,.1);flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:background .2s ease;
}
.menu-toggle:hover{background:rgba(255,255,255,.2)}
.menu-toggle span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,18,31,.5);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(84vw,340px);background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .32s cubic-bezier(.4,0,.2,1);
  padding:22px 20px 32px;display:flex;flex-direction:column;gap:10px;overflow-y:auto;
  box-shadow:-18px 0 40px -20px rgba(23,18,31,.4);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:6px}
.drawer-title{font-weight:800;color:var(--berry);font-size:17px}
.drawer-close{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--berry);font-size:17px;line-height:1}
.drawer-link{
  display:block;padding:13px 15px;border-radius:12px;color:var(--berry);font-weight:600;
  border:1px solid var(--line);transition:background .2s ease,border-color .2s ease;
}
.drawer-link:hover{background:rgba(91,46,158,.06)}
.drawer-link.is-active{background:rgba(91,46,158,.1);border-color:rgba(91,46,158,.32)}
.drawer .btn-cta{justify-content:center;margin-top:10px;padding:12px 20px}
body.is-locked{overflow:hidden}

/* ============ 通用板块 ============ */
.section{padding:56px 0}
.section--white{background:var(--surface)}
.section--dark{background:var(--dark);color:#fff}
.section--dark h2,.section--dark h3{color:#fff}
.sec-head{max-width:780px;margin-bottom:36px}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--berry);margin-bottom:12px;
}
.sec-title{font-size:clamp(1.55rem,3.2vw,2.4rem);font-weight:700;letter-spacing:-.015em}
.sec-sub{color:var(--muted);margin-top:14px;font-size:16px}
.section--dark .sec-tag{color:#B79CF7}
.section--dark .sec-sub{color:rgba(255,255,255,.7)}
.section--dark .sec-title{color:#fff}

/* ============ 按钮 ============ */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;background:var(--berry);color:#fff;font-weight:700;font-size:16px;
  border:1px solid transparent;box-shadow:0 10px 26px -12px rgba(91,46,158,.8);
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-primary:hover{background:var(--berry-deep);transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(62,31,112,.85)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;background:#fff;color:var(--berry);font-weight:700;font-size:16px;
  border:1px solid var(--berry);transition:background .22s ease,transform .22s ease,color .22s ease;
}
.btn-ghost:hover{background:rgba(91,46,158,.08);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{
  color:var(--berry);font-weight:600;font-size:15px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .2s ease;
}
.link-arrow:hover{color:var(--mint)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:var(--dark);isolation:isolate}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45;z-index:0}
.hero-veil{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(23,18,31,.6) 0%,rgba(23,18,31,.84) 58%,#17121F 100%);
}
.hero-inner{position:relative;z-index:2;padding:72px 0 64px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.82);
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background-image:var(--grad)}
.hero h1{
  color:#fff;font-size:clamp(2.2rem,5vw,4.2rem);font-weight:800;line-height:1.08;
  letter-spacing:-.02em;margin-top:18px;
}
.hero-lead{color:rgba(255,255,255,.78);margin-top:20px;max-width:660px;font-size:16.5px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:26px;margin-top:34px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14)}
.hero-point strong{display:block;color:#fff;font-size:26px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.hero-point span{display:block;color:rgba(255,255,255,.66);font-size:14px;margin-top:4px}
.route-panel{
  background:#1E1830;border:1px solid rgba(255,255,255,.12);border-radius:var(--r-card);
  padding:22px;box-shadow:0 20px 44px -26px rgba(0,0,0,.8);
}
.route-media{position:relative;aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;background:#2A2140}
.route-media img{width:100%;height:100%;object-fit:cover;opacity:.9}
.play-badge{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:52px;height:52px;border-radius:50%;background:var(--mint);
  display:grid;place-items:center;border:0;
  animation:pulseRing 2.6s ease-out infinite;
}
.play-badge svg{margin-left:3px}
@keyframes pulseRing{
  0%{box-shadow:0 0 0 0 rgba(18,199,154,.5)}
  70%{box-shadow:0 0 0 18px rgba(18,199,154,0)}
  100%{box-shadow:0 0 0 0 rgba(18,199,154,0)}
}
.route-media-tag{
  position:absolute;left:12px;bottom:12px;background:rgba(23,18,31,.72);
  color:#fff;font-size:12.5px;padding:5px 11px;border-radius:999px;letter-spacing:.02em;
}
.route-title{color:#fff;font-size:16px;font-weight:700;margin-top:20px}
.route-list{margin-top:14px}
.route-item{position:relative;padding:0 0 16px 22px;color:rgba(255,255,255,.78);font-size:14.5px}
.route-item b{color:#fff;font-weight:600;margin-right:8px;font-variant-numeric:tabular-nums}
.route-item::before{
  content:"";position:absolute;left:3px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--mint);box-shadow:0 0 0 3px rgba(18,199,154,.16);
}
.route-item::after{
  content:"";position:absolute;left:7px;top:20px;bottom:2px;width:1px;background:rgba(255,255,255,.16);
}
.route-item:last-child{padding-bottom:0}
.route-item:last-child::after{display:none}
.subscribe{display:flex;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}
.subscribe input{
  flex:1;min-width:0;padding:11px 16px;border-radius:999px;font-size:14.5px;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;
}
.subscribe input::placeholder{color:rgba(255,255,255,.5)}
.subscribe input:focus{outline:none;border-color:var(--mint)}
.subscribe button{
  border:0;border-radius:999px;padding:11px 20px;background:var(--mint);color:#10201B;
  font-weight:700;font-size:14.5px;white-space:nowrap;transition:background .2s ease,transform .2s ease;
}
.subscribe button:hover{background:#0FB68C;transform:translateY(-1px)}
.form-note{color:rgba(255,255,255,.5);font-size:13px;margin-top:10px}

/* ============ 卡片 ============ */
.card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-xs);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.35)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EDE9F4}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:20px;font-weight:600;line-height:1.35}
.card-text{color:var(--muted);font-size:15px;line-height:1.72}
.card-foot{margin-top:auto;padding-top:6px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.03em;background:rgba(91,46,158,.09);color:var(--berry);
}
.tag--mint{background:rgba(18,199,154,.12);color:#0B8F6E}
.icon-tile{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex:0 0 auto;
  background:rgba(91,46,158,.09);color:var(--berry);
}

/* ============ 数据条 ============ */
.stat-grid{display:grid;gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-card);overflow:hidden}
.stat-cell{background:var(--dark);padding:30px 24px}
.stat-num{font-size:clamp(1.9rem,3.6vw,2.6rem);font-weight:800;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.1}
.stat-label{color:rgba(255,255,255,.66);font-size:14.5px;margin-top:8px}
.stat-note{color:rgba(255,255,255,.42);font-size:13px;margin-top:6px}

/* ============ 场景交替 ============ */
.scene-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#EDE9F4}
.scene-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-list li{display:flex;gap:10px;color:var(--muted);font-size:15.5px;margin-top:12px}
.scene-list li::before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--mint);margin-top:10px}

/* ============ 流程 ============ */
.step{position:relative;padding:26px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-xs);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;height:100%}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.32)}
.step-idx{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;
  font-weight:800;font-size:15px;background-image:var(--grad);font-variant-numeric:tabular-nums;
}
.step h3{font-size:19px;font-weight:600;margin-top:16px}
.step p{color:var(--muted);font-size:15px;margin-top:9px}
.step-line{position:absolute;left:50%;right:-50%;top:44px;height:1px;background-image:linear-gradient(90deg,rgba(91,46,158,.3),rgba(18,199,154,.3))}
@media(max-width:1023px){.step-line{display:none}}

/* ============ 案例墙 ============ */
.case{position:relative;display:block;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:#EDE9F4;box-shadow:var(--shadow-xs);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.35)}
.case img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;transition:transform .5s ease}
.case:hover img{transform:scale(1.03)}
.case-overlay{
  position:absolute;inset:0;display:flex;align-items:flex-end;padding:18px;
  background:linear-gradient(180deg,rgba(23,18,31,0) 32%,rgba(23,18,31,.9) 100%);
  opacity:0;transition:opacity .3s ease;color:#fff;font-size:14.5px;line-height:1.6;
}
.case:hover .case-overlay{opacity:1}
.case-caption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;color:#fff;font-size:15.5px;font-weight:600;
  background:linear-gradient(180deg,rgba(23,18,31,0) 0%,rgba(23,18,31,.82) 100%);
}
.case:hover .case-caption{opacity:0;transition:opacity .25s ease}

/* ============ 分类入口 ============ */
.cat-entry{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:24px 26px;border-radius:var(--r-card);background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-xs);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.cat-entry:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.35)}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-strong);background:#fff;color:var(--ink);font-size:14.5px;font-weight:500;
  transition:all .2s ease;
}
.chip:hover{border-color:var(--berry);color:var(--berry);background:rgba(91,46,158,.06)}
.chip.is-active{background:var(--berry);border-color:var(--berry);color:#fff}

/* ============ 资讯 ============ */
.news-item{display:block;padding:16px 0;border-bottom:1px solid var(--line);transition:padding-left .2s ease}
.news-item:last-child{border-bottom:0}
.news-item:hover{padding-left:6px}
.news-date{color:var(--muted);font-size:13.5px;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.news-title{font-size:16.5px;font-weight:600;margin-top:6px;transition:color .2s ease}
.news-item:hover .news-title{color:var(--berry)}
.news-desc{color:var(--muted);font-size:14.5px;margin-top:5px}

/* ============ 评价 ============ */
.quote{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;
  box-shadow:var(--shadow-xs);height:100%;display:flex;flex-direction:column;gap:16px;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.3)}
.quote p{font-size:16px;line-height:1.8}
.quote-who{display:flex;align-items:center;gap:12px;margin-top:auto}
.avatar{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:#fff;
  font-weight:700;font-size:15px;background-image:var(--grad);flex:0 0 auto;
}
.quote-name{font-weight:600;font-size:15px}
.quote-role{color:var(--muted);font-size:13.5px}

/* ============ 合作伙伴 ============ */
.partner-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.partner-cell{
  background:#fff;padding:26px 18px;text-align:center;color:#8E879B;font-size:15.5px;font-weight:600;
  letter-spacing:.04em;transition:color .25s ease,background .25s ease;
}
.partner-cell:hover{color:var(--berry);background:#FCFBFE}

/* ============ FAQ ============ */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease}
.faq-item.is-open{border-color:rgba(91,46,158,.4);box-shadow:0 12px 30px -18px rgba(91,46,158,.5)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:rgba(91,46,158,.1);color:var(--berry);font-size:16px;font-weight:700;line-height:1;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.faq-item.is-open .faq-icon{background:var(--berry);color:#fff;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s cubic-bezier(.4,0,.2,1)}
.faq-a-inner{padding:0 22px 22px;color:var(--muted);font-size:15.5px;line-height:1.8}

/* ============ 保障条 ============ */
.guard{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.guard-item{display:flex;align-items:center;gap:12px;padding:20px 0}
.guard-item svg{flex:0 0 auto}
.guard-item strong{display:block;font-size:15.5px;font-weight:600}
.guard-item span{display:block;color:var(--muted);font-size:13.8px;margin-top:2px}

/* ============ 收口 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:22px;padding:52px 34px;
  background-image:var(--grad);color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.cta-band h2{color:#fff;font-size:clamp(1.5rem,3vw,2.2rem);font-weight:700;position:relative;z-index:1}
.cta-band p{color:rgba(255,255,255,.86);margin-top:14px;max-width:620px;position:relative;z-index:1}
.cta-band .btn-ghost{background:#fff;border-color:#fff;position:relative;z-index:1}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.88)}
.cta-meta{position:relative;z-index:1;margin-top:22px;color:rgba(255,255,255,.78);font-size:14px;display:flex;flex-wrap:wrap;gap:8px 22px}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#B7B2C4;padding:60px 0 0;margin-top:8px}
.footer-title{color:#fff;font-size:15.5px;font-weight:700;margin-bottom:16px}
.footer-text{color:#B7B2C4;font-size:14.6px;line-height:1.8}
.footer-list li{margin-bottom:10px}
.footer-list a{color:#B7B2C4;font-size:14.6px;transition:color .2s ease}
.footer-list a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding:22px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13.8px;color:rgba(183,178,196,.85);
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;margin-bottom:14px}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1 !important;transform:none !important}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (min-width:768px){
  .section{padding:88px 0}
  .hero-inner{padding:96px 0 80px}
  .partner-grid{grid-template-columns:repeat(4,1fr)}
}
@media (min-width:1024px){
  .section{padding:104px 0}
  .stat-grid{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .nav-bar{height:56px}
  .brand{font-size:17px}
}
@media (max-width:640px){
  .btn-cta{display:none}
  .hero-actions .btn-primary,.hero-actions .btn-ghost{width:100%}
  .hero-points{gap:20px}
  .hero-point strong{font-size:22px}
  .subscribe{flex-direction:column}
  .subscribe button{width:100%}
  .card-title{font-size:18.5px}
  .faq-q{font-size:16px;padding:17px 18px}
  .faq-a-inner{padding:0 18px 18px}
  .cta-band{padding:40px 22px}
}

/* roulang page: category1 */
:root{
  --berry:#5B2E9E;
  --berry-deep:#3E1F70;
  --berry-light:#8B5CF6;
  --mint:#12C79A;
  --bg:#F7F5FA;
  --surface:#FFFFFF;
  --dark:#17121F;
  --ink:#1B1626;
  --muted:#6B6478;
  --line:rgba(27,22,38,.08);
  --line-strong:rgba(27,22,38,.14);
  --r-card:16px;
  --r-img:12px;
  --shadow-xs:0 1px 2px rgba(27,22,38,.04);
  --shadow-lg:0 14px 34px -14px rgba(91,46,158,.28);
  --grad:linear-gradient(92deg,#5B2E9E 0%,#8B5CF6 52%,#12C79A 118%);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:16.5px;line-height:1.75;
  color:var(--ink);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;cursor:pointer;background:none;border:none}
ul,ol,li{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--berry-light);outline-offset:3px;border-radius:6px}
/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background-image:var(--grad);
  transition:box-shadow .3s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(62,31,112,.18)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;letter-spacing:.01em;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.3);display:grid;place-items:center;flex:0 0 auto;
  transition:background .25s ease,transform .25s ease;
}
.brand:hover .brand-mark{background:rgba(255,255,255,.26);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:inline-block;padding:9px 14px;border-radius:999px;
  color:rgba(255,255,255,.82);font-size:15px;font-weight:500;
  transition:color .22s ease,background .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:#fff;border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .28s cubic-bezier(.4,0,.2,1);
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.14)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:600;background:rgba(255,255,255,.14)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:10px}
.btn-cta{
  display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:999px;
  background:var(--mint);color:#10201B;font-weight:700;font-size:15px;white-space:nowrap;
  box-shadow:0 6px 18px -8px rgba(18,199,154,.75);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn-cta:hover{transform:translateY(-1px);background:#0FB68C;box-shadow:0 10px 24px -10px rgba(18,199,154,.9)}
.btn-cta:active{transform:translateY(0)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.3);
  background:rgba(255,255,255,.1);flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:background .2s ease;
}
.menu-toggle:hover{background:rgba(255,255,255,.2)}
.menu-toggle span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,18,31,.5);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(84vw,340px);background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .32s cubic-bezier(.4,0,.2,1);
  padding:22px 20px 32px;display:flex;flex-direction:column;gap:10px;overflow-y:auto;
  box-shadow:-18px 0 40px -20px rgba(23,18,31,.4);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:6px}
.drawer-title{font-weight:800;color:var(--berry);font-size:17px}
.drawer-close{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--berry);font-size:16px;line-height:1}
.drawer-link{
  display:block;padding:13px 15px;border-radius:12px;color:var(--berry);font-weight:600;
  border:1px solid var(--line);transition:background .2s ease,border-color .2s ease;
}
.drawer-link:hover{background:rgba(91,46,158,.06)}
.drawer-link.is-active{background:rgba(91,46,158,.1);border-color:rgba(91,46,158,.32)}
.drawer .btn-cta{justify-content:center;margin-top:10px;padding:12px 20px}
body.is-locked{overflow:hidden}
/* ============ 通用板块 ============ */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:84px 0}}
.section--white{background:var(--surface)}
.section--dark{background:var(--dark);color:#fff}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--berry);margin-bottom:12px;
}
.sec-title{font-size:clamp(1.5rem,3.1vw,2.25rem);font-weight:700;letter-spacing:-.015em;line-height:1.25}
.sec-sub{color:var(--muted);font-size:15.5px;line-height:1.8;max-width:720px;margin-top:10px}
.section--dark .sec-tag{color:#B79CF7}
.section--dark .sec-sub{color:rgba(255,255,255,.7)}
.section--dark .sec-title{color:#fff}
.sec-head{margin-bottom:32px}
@media(min-width:768px){.sec-head{margin-bottom:44px}}
/* ============ 按钮 ============ */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;background:var(--berry);color:#fff;font-weight:700;font-size:16px;
  border:1px solid transparent;box-shadow:0 10px 26px -12px rgba(91,46,158,.8);
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-primary:hover{background:var(--berry-deep);transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(62,31,112,.85)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;background:#fff;color:var(--berry);font-weight:700;font-size:15.5px;
  border:1px solid var(--berry);
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn-ghost:hover{background:rgba(91,46,158,.08);transform:translateY(-1px);box-shadow:0 12px 26px -16px rgba(91,46,158,.7)}
.btn-ghost:active{transform:translateY(0)}
.btn-mint{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;background:var(--mint);color:#10201B;font-weight:800;font-size:16px;
  box-shadow:0 12px 28px -14px rgba(18,199,154,.9);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.btn-mint:hover{transform:translateY(-1px);background:#0FB68C;box-shadow:0 18px 34px -16px rgba(18,199,154,1)}
.btn-mint:active{transform:translateY(0)}
/* ============ 分类头 ============ */
.cat-hero{
  position:relative;
  padding:32px 0 38px;
  background:
    radial-gradient(760px 300px at 92% -40%, rgba(139,92,246,.18), transparent 68%),
    radial-gradient(520px 260px at 4% 130%, rgba(18,199,154,.10), transparent 70%),
    rgba(91,46,158,.06);
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--berry)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--berry);font-weight:600}
.cat-hero-grid{display:grid;gap:26px;grid-template-columns:minmax(0,1fr)}
@media(min-width:1024px){
  .cat-hero-grid{grid-template-columns:minmax(0,1.55fr) minmax(320px,.85fr);gap:44px;align-items:start}
}
.cat-h1{
  font-size:clamp(1.75rem,3.5vw,2.6rem);font-weight:800;line-height:1.18;letter-spacing:-.02em;
  max-width:760px;
}
.cat-h1 em{font-style:normal;background-image:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cat-lead{color:var(--muted);font-size:16.5px;line-height:1.8;max-width:660px;margin-top:14px}
.cat-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.cat-tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--muted);font-size:13px;font-weight:600;
}
.cat-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--mint)}
.cat-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-xs);padding:20px 20px 18px;
}
.stat-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding-bottom:16px;border-bottom:1px solid var(--line)}
@media(min-width:1024px){.stat-list{grid-template-columns:minmax(0,1fr);gap:0;padding-bottom:14px}}
.stat-item{padding:0}
@media(min-width:1024px){
  .stat-item{display:flex;align-items:baseline;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
  .stat-item:last-child{border-bottom:none}
}
.stat-num{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:800;letter-spacing:-.02em;color:var(--berry);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:13px;color:var(--muted);line-height:1.5;display:block;margin-top:4px}
@media(min-width:1024px){.stat-label{margin-top:0}}
.spec-box{
  margin-top:16px;background:var(--dark);border-radius:var(--r-img);padding:14px 16px;
  font-family:var(--mono);font-size:12.5px;line-height:2;color:rgba(255,255,255,.78);
  overflow-x:auto;
}
.spec-box .row{display:flex;gap:10px;white-space:nowrap}
.spec-box .k{color:var(--mint);font-weight:700;min-width:62px;display:inline-block}
.spec-box .v{color:rgba(255,255,255,.62)}
.spec-title{
  display:block;font-family:var(--font);font-size:12px;letter-spacing:.08em;font-weight:700;
  color:rgba(255,255,255,.5);margin-bottom:8px;text-transform:uppercase;
}
/* ============ 标签条 ============ */
.chip-bar{
  display:flex;gap:10px;overflow-x:auto;padding:2px 2px 14px;
  scrollbar-width:thin;
}
@media(min-width:768px){.chip-bar{flex-wrap:wrap;overflow:visible;padding-bottom:6px}}
.chip{
  flex:0 0 auto;padding:9px 17px;border-radius:999px;background:#fff;border:1px solid var(--line);
  color:var(--ink);font-size:14.5px;font-weight:600;
  transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.chip:hover{border-color:rgba(91,46,158,.4);color:var(--berry);transform:translateY(-1px)}
.chip.is-on{background:var(--berry);border-color:var(--berry);color:#fff;box-shadow:0 10px 22px -14px rgba(91,46,158,.9)}
/* ============ 内容卡网格 ============ */
.v-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-xs);
  transition:transform .28s cubic-bezier(.4,0,.2,1),box-shadow .28s ease,border-color .28s ease;
}
.v-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.38)}
.v-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:#EDE9F5}
.v-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.4,0,.2,1)}
.v-card:hover .v-cover img{transform:scale(1.03)}
.v-badge{
  position:absolute;left:12px;bottom:12px;padding:4px 11px;border-radius:999px;
  background:rgba(23,18,31,.74);color:#fff;font-size:12px;font-weight:600;letter-spacing:.02em;
  backdrop-filter:blur(4px);
}
.v-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.v-title{font-size:17px;font-weight:700;line-height:1.5;letter-spacing:-.01em}
.v-title a{transition:color .2s ease}
.v-title a:hover{color:var(--berry)}
.v-desc{
  margin-top:9px;color:var(--muted);font-size:14.5px;line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.v-meta{
  margin-top:auto;padding-top:13px;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12.5px;font-weight:600;
}
.v-meta .sep{color:var(--line-strong)}
.list-foot{display:flex;justify-content:center;margin-top:34px}
/* ============ 精选三卡 ============ */
.pick-grid{display:grid;gap:22px;grid-template-columns:minmax(0,1fr)}
@media(min-width:1024px){.pick-grid{grid-template-columns:minmax(0,1.32fr) minmax(0,1fr)}}
.pick-main{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-xs);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.pick-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.38)}
.pick-main .v-cover{aspect-ratio:16/9}
.pick-side{display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
.mini-card{
  display:grid;grid-template-columns:112px minmax(0,1fr);gap:14px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:12px;
  box-shadow:var(--shadow-xs);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.38)}
.mini-card .thumb{aspect-ratio:16/9;border-radius:10px;overflow:hidden;background:#EDE9F5}
.mini-card .thumb img{width:100%;height:100%;object-fit:cover}
.mini-card h3{font-size:15.5px;font-weight:700;line-height:1.5}
.mini-card h3 a:hover{color:var(--berry)}
.mini-card p{color:var(--muted);font-size:13px;line-height:1.65;margin-top:6px}
@media(max-width:520px){
  .mini-card{grid-template-columns:minmax(0,1fr)}
  .mini-card .thumb{aspect-ratio:16/9}
}
/* ============ 步骤指南 ============ */
.step-grid{display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
@media(min-width:640px){.step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.step-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}}
.step-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 18px 18px;box-shadow:var(--shadow-xs);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.34)}
.step-num{
  width:30px;height:30px;border-radius:10px;display:grid;place-items:center;
  background-image:var(--grad);color:#fff;font-weight:800;font-size:14px;
  font-variant-numeric:tabular-nums;margin-bottom:13px;
}
.step-item h3{font-size:15.5px;font-weight:700;line-height:1.5}
.step-item p{color:var(--muted);font-size:13.5px;line-height:1.7;margin-top:8px}
/* ============ FAQ ============ */
.faq-list{max-width:880px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
  overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item:hover{border-color:rgba(91,46,158,.3)}
.faq-item.is-open{border-color:rgba(91,46,158,.42);box-shadow:0 12px 30px -20px rgba(91,46,158,.6)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;text-align:left;font-size:16.5px;font-weight:600;line-height:1.55;
}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:rgba(91,46,158,.1);
  color:var(--berry);display:grid;place-items:center;font-size:16px;line-height:1;
  transition:transform .3s ease,background .3s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(91,46,158,.18)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s cubic-bezier(.4,0,.2,1)}
.faq-a p{padding:0 20px 19px;color:var(--muted);font-size:15px;line-height:1.8}
/* ============ 专题与动态 ============ */
.topic-list{display:grid;gap:14px;grid-template-columns:minmax(0,1fr)}
@media(min-width:768px){.topic-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
.topic-item{
  display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;box-shadow:var(--shadow-xs);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.topic-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(91,46,158,.34)}
.topic-idx{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--berry);
  background:rgba(91,46,158,.08);border-radius:8px;padding:4px 9px;flex:0 0 auto;
}
.topic-item h3{font-size:16px;font-weight:700;line-height:1.55}
.topic-item h3 a:hover{color:var(--berry)}
.topic-item p{color:var(--muted);font-size:13.5px;line-height:1.7;margin-top:7px}
.news-list{display:grid;gap:14px;grid-template-columns:minmax(0,1fr)}
.news-item{
  display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:17px 20px;transition:border-color .24s ease,box-shadow .24s ease,transform .24s ease;
}
.news-item:hover{border-color:rgba(91,46,158,.34);box-shadow:0 12px 28px -20px rgba(91,46,158,.65);transform:translateY(-2px)}
.news-date{
  flex:0 0 auto;font-family:var(--mono);font-size:12.5px;font-weight:700;color:var(--berry-deep);
  background:rgba(91,46,158,.08);border-radius:8px;padding:5px 10px;white-space:nowrap;
}
.news-item h3{font-size:15.5px;font-weight:700;line-height:1.55}
.news-item h3 a:hover{color:var(--berry)}
.news-item p{color:var(--muted);font-size:13.5px;line-height:1.68;margin-top:6px}
@media(max-width:520px){.news-item{flex-direction:column;gap:10px}}
/* ============ 保障条 ============ */
.guard-grid{display:grid;gap:20px;grid-template-columns:minmax(0,1fr)}
@media(min-width:640px){.guard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.guard-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.guard-item{display:flex;gap:14px;align-items:flex-start}
.guard-icon{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(18,199,154,.14);color:var(--mint);border:1px solid rgba(18,199,154,.3);
}
.guard-item h3{font-size:16px;font-weight:700;color:#fff;line-height:1.5}
.guard-item p{font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.66);margin-top:6px}
/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background-image:var(--grad);border-radius:22px;
  padding:38px 26px;color:#fff;
}
@media(min-width:768px){.cta-band{padding:52px 48px}}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.12);pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:grid;gap:24px;grid-template-columns:minmax(0,1fr);align-items:center}
@media(min-width:1024px){.cta-inner{grid-template-columns:minmax(0,1.5fr) auto;gap:40px}}
.cta-band h2{font-size:clamp(1.4rem,2.8vw,2rem);font-weight:800;letter-spacing:-.015em;line-height:1.3;color:#fff}
.cta-band p{margin-top:12px;font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.86);max-width:640px}
.cta-contact{margin-top:16px;font-size:13.5px;color:rgba(255,255,255,.78)}
.cta-contact a{text-decoration:underline;text-underline-offset:4px;transition:color .2s ease}
.cta-contact a:hover{color:#fff}
.back-top{display:flex;justify-content:center;margin-top:26px}
.back-top a{
  font-size:13.5px;font-weight:600;color:var(--muted);display:inline-flex;align-items:center;gap:6px;
  transition:color .2s ease;
}
.back-top a:hover{color:var(--berry)}
/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#B7B2C4;padding:56px 0 26px;margin-top:0}
@media(min-width:768px){.site-footer{padding:68px 0 28px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;margin-bottom:14px}
.footer-text{font-size:14px;line-height:1.85;color:#B7B2C4;margin:0;max-width:420px}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.01em}
.footer-list li{margin-bottom:10px}
.footer-list a,.footer-list span{font-size:14px;color:#B7B2C4;transition:color .2s ease}
.footer-list a:hover{color:#fff}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .55s cubic-bezier(.4,0,.2,1),transform .55s cubic-bezier(.4,0,.2,1)}
.reveal.is-in{opacity:1;transform:translateY(0)}
.reveal[data-d="1"]{transition-delay:.07s}
.reveal[data-d="2"]{transition-delay:.14s}
.reveal[data-d="3"]{transition-delay:.21s}
@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 !important;transform:none !important}
}
/* ============ 响应式导航 ============ */
@media(max-width:1023px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .nav-right .btn-cta{display:none}
  .nav-bar{height:56px}
  .brand{font-size:16.5px}
  .brand-mark{width:30px;height:30px;border-radius:10px}
}
@media(max-width:520px){
  .cat-hero{padding:24px 0 30px}
  .cat-tag{font-size:12.5px;padding:5px 12px}
  .stat-num{font-size:1.35rem}
  .sec-title{font-size:1.42rem}
}