/* roulang page: index */
:root{
  --p:#7A5CFF; --c:#2FE0D0; --k:#FF5FA2; --y:#FFC53D;
  --bg:#F6F4FF; --card:#FFFFFF; --dark:#191634; --border:#E8E4FA;
  --t1:#1B1830; --t2:#565173; --t3:#8B87A3;
  --grad:linear-gradient(120deg,#7A5CFF 0%,#FF5FA2 55%,#2FE0D0 100%);
  --r-lg:24px; --r-md:16px; --r-sm:12px;
  --sh:0 12px 32px rgba(122,92,255,.12);
  --sh-h:0 20px 48px rgba(122,92,255,.22);
  --bs-primary:#7A5CFF; --bs-body-bg:#F6F4FF; --bs-body-color:#1B1830;
  --bs-border-color:#E8E4FA; --bs-border-radius:16px; --bs-border-radius-lg:24px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--t1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--p);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--k);}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--t1);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;}
.num,.stat-num,.hb-num{font-variant-numeric:tabular-nums;}
@media (min-width:1400px){.container{max-width:1320px;}}

:focus-visible{outline:3px solid rgba(122,92,255,.35);outline-offset:2px;border-radius:8px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.site-header.scrolled{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 24px rgba(27,24,48,.06);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.brand{display:inline-flex;align-items:center;gap:10px;padding:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 38px;
  box-shadow:0 8px 20px rgba(122,92,255,.28);
}
.brand-mark svg{width:18px;height:18px;fill:#fff;}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.4px;color:#fff;transition:color .25s ease-out;}
.site-header.scrolled .brand-name{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav .nav-link{
  position:relative;font-size:15px;font-weight:500;color:rgba(255,255,255,.86);
  padding:8px 14px !important;transition:color .2s ease-out;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.main-nav .nav-link:hover::after,.main-nav .nav-link.active::after{transform:scaleX(1);}
.main-nav .nav-link:hover,.main-nav .nav-link.active{color:#fff;}
.site-header.scrolled .main-nav .nav-link{color:var(--t2);}
.site-header.scrolled .main-nav .nav-link:hover,.site-header.scrolled .main-nav .nav-link.active{color:var(--t1);}
.icon-btn{
  width:40px;height:40px;border-radius:999px;border:1px solid rgba(255,255,255,.3);
  background:rgba(255,255,255,.12);display:inline-flex;align-items:center;justify-content:center;
  color:#fff;transition:all .2s ease-out;
}
.icon-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;}
.icon-btn:hover{background:rgba(255,255,255,.24);}
.site-header.scrolled .icon-btn{border-color:var(--border);background:#fff;color:var(--t2);}
.site-header.scrolled .icon-btn:hover{border-color:var(--p);color:var(--p);}

.btn-brand{
  display:inline-flex;align-items:center;gap:8px;
  background-image:var(--grad);background-size:180% 180%;background-position:0% 50%;
  color:#fff !important;border:0;border-radius:999px;padding:12px 26px;
  font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;
  box-shadow:0 10px 26px rgba(122,92,255,.22);
  transition:background-position .25s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-brand:hover{background-position:100% 50%;transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,95,162,.32);}
.btn-brand .arrow{transition:transform .2s ease-out;display:inline-flex;}
.btn-brand:hover .arrow{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);
  color:var(--p) !important;border-radius:999px;padding:11px 24px;font-size:15px;font-weight:600;line-height:1.2;
  transition:all .2s ease-out;
}
.btn-ghost:hover{background:var(--bg);border-color:rgba(122,92,255,.55);transform:translateY(-2px);}
.btn-ghost-dark{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.34);color:#fff !important;border-radius:999px;
  padding:11px 24px;font-size:15px;font-weight:600;line-height:1.2;transition:all .2s ease-out;
}
.btn-ghost-dark:hover{background:rgba(255,255,255,.18);transform:translateY(-2px);}
.btn-brand-sm{border-radius:14px;padding:9px 18px;font-size:14px;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--p);
}
.text-link::after{content:"→";transition:transform .2s ease-out;display:inline-block;}
.text-link:hover::after{transform:translateX(4px);}

.navbar-toggler{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:12px;padding:8px 10px;}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(122,92,255,.35);}
.toggler-bars{display:block;width:20px;}
.toggler-bars span{display:block;height:2px;border-radius:2px;background:#fff;margin:4px 0;transition:background .25s;}
.site-header.scrolled .toggler-bars span{background:var(--t1);}

.offcanvas{border-radius:24px 0 0 24px;}
.offcanvas-header{border-bottom:1px solid var(--border);padding:22px 24px;}
.offcanvas-body{padding:20px 24px 32px;}
.m-nav-link{display:block;padding:13px 4px;font-size:16px;font-weight:600;color:var(--t1);border-bottom:1px dashed var(--border);}
.m-nav-link:hover{color:var(--p);}
.btn-close-custom{width:36px;height:36px;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--t2);display:inline-flex;align-items:center;justify-content:center;font-size:16px;line-height:1;}

/* ---------- hero ---------- */
.hero{position:relative;isolation:isolate;overflow:hidden;color:#fff;background:var(--dark);padding:172px 0 96px;}
.hero-bg{position:absolute;inset:0;z-index:-2;background-image:url('/assets/images/backpic/back-1.jpg');background-size:cover;background-position:center 35%;}
.hero-mask{position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,rgba(25,22,52,.90) 0%,rgba(25,22,52,.66) 48%,rgba(25,22,52,.30) 100%);}
.hero-mask::after{content:"";position:absolute;inset:0;background:var(--grad);opacity:.20;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.28);
  font-size:13.5px;font-weight:600;color:#fff;margin-bottom:22px;
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--c);display:inline-block;}
.hero h1{font-size:48px;line-height:1.16;font-weight:800;color:#fff;letter-spacing:-.4px;}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#FFC53D 0%,#FF5FA2 55%,#2FE0D0 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-lead{font-size:16px;line-height:1.9;color:rgba(255,255,255,.82);max-width:640px;margin-top:20px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-mini{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.mini-chip{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 15px;border-radius:999px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);
  font-size:13px;color:rgba(255,255,255,.9);
}
.mini-chip b{color:#fff;font-weight:700;}
.hero-badges{
  position:absolute;right:max(24px,calc((100% - 1320px)/2 + 24px));bottom:56px;
  display:flex;gap:14px;z-index:3;
}
.hero-badge{
  min-width:132px;padding:16px 18px;border-radius:20px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.24);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  display:flex;flex-direction:column;gap:2px;
}
.hb-num{font-size:32px;font-weight:800;line-height:1.1;
  background:linear-gradient(120deg,#FFC53D 0%,#FF5FA2 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.hb-unit{font-size:12px;font-weight:600;color:rgba(255,255,255,.72);}
.hb-label{font-size:12.5px;color:rgba(255,255,255,.86);margin-top:4px;}

/* ---------- pill bar ---------- */
.pill-bar{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.pill-scroll{
  display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:16px 0;scrollbar-width:none;-ms-overflow-style:none;
}
.pill-scroll::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;scroll-snap-align:start;display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--border);
  background:#fff;color:var(--t2) !important;font-size:14px;font-weight:500;
  transition:all .2s ease-out;
}
.pill:hover{border-color:rgba(122,92,255,.5);color:var(--p) !important;transform:translateY(-2px);}
.pill.active{background-image:var(--grad);color:#fff !important;border-color:transparent;box-shadow:0 10px 24px rgba(122,92,255,.24);}
.pill.active::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.sec-title{position:relative;padding-left:16px;font-size:32px;font-weight:700;line-height:1.3;}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:var(--grad);}
.sec-sub{font-size:15px;color:var(--t2);line-height:1.85;max-width:780px;margin-top:14px;}
.sec-eyebrow{font-size:13px;font-weight:700;letter-spacing:1.4px;color:var(--p);text-transform:uppercase;margin-bottom:10px;}

/* ---------- cards ---------- */
.v-card{
  position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.v-card::before{
  content:"";position:absolute;top:0;left:0;height:3px;width:0;background:var(--grad);
  transition:width .3s ease-out;z-index:3;
}
.v-card:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:rgba(122,92,255,.28);}
.v-card:hover::before{width:100%;}
.v-card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.v-card-title{font-size:19px;font-weight:700;line-height:1.45;}
.v-card-text{font-size:14px;color:var(--t2);line-height:1.75;}

.cover-frame{position:relative;overflow:hidden;background:linear-gradient(120deg,#EFEBFF,#E4FBF8);}
.cover-frame img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease-out;}
.v-card:hover .cover-frame img{transform:scale(1.04);}
.ratio-43{aspect-ratio:4/3;}
.ratio-169{aspect-ratio:16/9;}
.ratio-11{aspect-ratio:1/1;}

.num-badge{
  position:absolute;top:12px;left:12px;z-index:2;border-radius:8px;
  background:rgba(25,22,52,.74);color:#fff;font-size:12px;font-weight:700;
  padding:4px 10px;letter-spacing:.6px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 11px;border-radius:999px;
  border:1px solid var(--border);background:#fff;font-size:12.5px;color:var(--t2);white-space:nowrap;
}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid var(--border);padding-top:12px;margin-top:auto;font-size:13px;color:var(--t3);
}
.stat-pill{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 16px;border-radius:999px;
  background:linear-gradient(120deg,rgba(122,92,255,.13),rgba(47,224,208,.13));
  border:1px solid rgba(122,92,255,.3);color:var(--t1);font-size:13.5px;font-weight:600;
}
.stat-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--k);flex:0 0 8px;}

/* ---------- metrics ---------- */
.metric-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:24px 22px;height:100%;position:relative;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--sh);}
.metric-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;}
.metric-label{font-size:14px;color:var(--t2);font-weight:600;}
.metric-num{font-size:44px;font-weight:800;line-height:1;letter-spacing:-1px;
  background:linear-gradient(120deg,#7A5CFF 0%,#FF5FA2 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.metric-num small{font-size:16px;font-weight:600;margin-left:4px;color:var(--t2);
  background:none;-webkit-text-fill-color:var(--t2);}
.metric-note{font-size:13px;color:var(--t3);margin-top:12px;line-height:1.7;}
.metric-wide{
  background:linear-gradient(135deg,#FFFFFF 0%,#FAF8FF 100%);
  border:1px solid var(--border);border-radius:var(--r-md);padding:24px 26px;height:100%;
}
.trend{display:flex;align-items:flex-end;gap:10px;height:104px;margin-top:18px;}
.trend i{flex:1;border-radius:8px 8px 4px 4px;background:linear-gradient(180deg,#7A5CFF,#2FE0D0);opacity:.85;display:block;}
.trend i:nth-child(even){background:linear-gradient(180deg,#FF5FA2,#FFC53D);}

/* ---------- service matrix ---------- */
.svc-main{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:30px 30px 28px;
  height:100%;display:flex;gap:22px;position:relative;overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.svc-main::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);}
.svc-main:hover{transform:translateY(-4px);box-shadow:var(--sh-h);}
.svc-icon{
  width:64px;height:64px;flex:0 0 64px;border-radius:18px;background-image:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;box-shadow:0 12px 26px rgba(122,92,255,.26);
}
.svc-icon svg{width:28px;height:28px;stroke:#fff;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.svc-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.svc-list li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);line-height:1.7;}
.svc-list li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--grad);flex:0 0 8px;margin-top:9px;}
.svc-card-icon{
  width:44px;height:44px;border-radius:14px;background:rgba(122,92,255,.10);
  display:inline-flex;align-items:center;justify-content:center;
}
.svc-card-icon svg{width:20px;height:20px;stroke:var(--p);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- compare ---------- */
.compare{background:var(--dark);color:#fff;padding:96px 0;}
.compare h2{color:#fff;}
.compare .sec-sub{color:rgba(255,255,255,.72);}
.cmp-panel{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg);padding:28px;height:100%;}
.cmp-panel h3{color:#fff;font-size:20px;margin-bottom:6px;}
.cmp-panel .cap{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:20px;}
.cmp-item{margin-bottom:20px;}
.cmp-item:last-child{margin-bottom:0;}
.cmp-line{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14.5px;color:rgba(255,255,255,.82);margin-bottom:9px;}
.cmp-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden;}
.cmp-bar span{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(120deg,#7A5CFF,#FF5FA2 55%,#2FE0D0);transition:width 1.1s ease-out;}
.cmp-bar.plain span{background:rgba(255,255,255,.34);}
.cmp-axis{width:1px;background:linear-gradient(180deg,transparent,#7A5CFF,#FF5FA2,#2FE0D0,transparent);border-radius:2px;align-self:stretch;}

/* ---------- timeline ---------- */
.timeline{position:relative;display:flex;gap:18px;margin-top:44px;}
.tl-item{flex:1;position:relative;padding-top:48px;}
.tl-item::before{content:"";position:absolute;top:9px;left:18px;right:-18px;height:1px;background:var(--border);}
.tl-item:last-child::before{display:none;}
.tl-dot{position:absolute;top:0;left:0;width:20px;height:20px;border-radius:50%;background-image:var(--grad);box-shadow:0 0 0 3px rgba(255,197,61,.55);}
.tl-year{font-size:14px;font-weight:800;color:var(--p);letter-spacing:.6px;margin-bottom:8px;font-variant-numeric:tabular-nums;}
.tl-title{font-size:17px;font-weight:700;margin-bottom:8px;}
.tl-text{font-size:13.5px;color:var(--t2);line-height:1.75;}

/* ---------- news ---------- */
.news-main .cover-frame{border-radius:0;}
.news-side-item{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border:1px solid var(--border);border-radius:var(--r-md);background:#fff;transition:all .2s ease-out;}
.news-side-item:hover{border-color:rgba(122,92,255,.35);box-shadow:var(--sh);transform:translateY(-2px);}
.news-thumb{width:120px;height:80px;flex:0 0 120px;border-radius:12px;overflow:hidden;background:linear-gradient(120deg,#EFEBFF,#E4FBF8);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-side-title{font-size:15.5px;font-weight:600;line-height:1.55;color:var(--t1);}
.news-side-date{font-size:12.5px;color:var(--t3);margin-top:6px;}

/* ---------- guarantee ---------- */
.guard-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:26px 24px;height:100%;display:flex;flex-direction:column;gap:12px;transition:transform .2s ease-out,box-shadow .2s ease-out;}
.guard-card:hover{transform:translateY(-4px);box-shadow:var(--sh);}
.guard-icon{width:48px;height:48px;border-radius:16px;background:linear-gradient(120deg,rgba(122,92,255,.14),rgba(47,224,208,.16));display:inline-flex;align-items:center;justify-content:center;}
.guard-icon svg{width:22px;height:22px;stroke:var(--p);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.guard-foot{border-top:1px solid var(--border);padding-top:12px;font-size:12.5px;color:var(--t3);margin-top:auto;}

/* ---------- quick answer ---------- */
.qa-track{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 18px;scrollbar-width:none;-ms-overflow-style:none;}
.qa-track::-webkit-scrollbar{display:none;}
.qa-card{
  flex:0 0 300px;scroll-snap-align:start;position:relative;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:22px 22px 22px 26px;overflow:hidden;
}
.qa-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);}
.qa-q{font-size:15.5px;font-weight:700;margin-bottom:10px;}
.qa-a{font-size:13.5px;color:var(--t2);line-height:1.8;}
.qa-more{position:absolute;right:16px;bottom:14px;font-size:12px;color:var(--t3);}

/* ---------- review ---------- */
.review-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:26px 24px;height:100%;display:flex;flex-direction:column;gap:14px;transition:transform .2s ease-out,box-shadow .2s ease-out;}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh);}
.stars{display:flex;gap:4px;}
.stars svg{width:16px;height:16px;fill:var(--y);}
.review-title{font-size:16.5px;font-weight:700;line-height:1.55;}
.review-text{font-size:13.5px;color:var(--t2);line-height:1.8;}
.review-user{display:flex;align-items:center;gap:12px;margin-top:auto;border-top:1px solid var(--border);padding-top:14px;}
.avatar{width:40px;height:40px;border-radius:999px;background-image:var(--grad);color:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center;font-size:15px;}
.review-name{font-size:14px;font-weight:600;}
.review-role{font-size:12.5px;color:var(--t3);}
.review-card.offset{margin-top:-12px;}

/* ---------- logo wall ---------- */
.logo-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:14px;}
.logo-cell{
  height:78px;border:1px solid var(--border);border-radius:var(--r-sm);background:#fff;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:13px;font-weight:600;color:var(--t3);padding:8px;transition:all .2s ease-out;
}
.logo-cell:hover{color:var(--p);border-color:rgba(122,92,255,.4);background:linear-gradient(120deg,rgba(122,92,255,.06),rgba(47,224,208,.08));transform:translateY(-3px);}

/* ---------- faq ---------- */
.accordion-item-faq{
  background:#fff;border:1px solid var(--border) !important;border-radius:var(--r-md) !important;
  margin-bottom:12px;overflow:hidden;
}
.accordion-item-faq .accordion-button{
  background:#fff;color:var(--t1);font-size:16px;font-weight:650;padding:20px 22px;
  border-radius:var(--r-md) !important;box-shadow:none;
}
.accordion-item-faq .accordion-button:not(.collapsed){
  background:linear-gradient(120deg,rgba(122,92,255,.08),rgba(47,224,208,.08));color:var(--t1);
}
.accordion-item-faq .accordion-button::after{display:none;}
.accordion-item-faq .accordion-button .sign{
  margin-left:auto;width:26px;height:26px;flex:0 0 26px;border-radius:999px;
  border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;color:var(--p);font-weight:700;transition:all .2s ease-out;
}
.accordion-item-faq .accordion-button:not(.collapsed) .sign{background-image:var(--grad);color:#fff;border-color:transparent;}
.accordion-item-faq .accordion-button:focus{box-shadow:0 0 0 3px rgba(122,92,255,.22);}
.accordion-body-faq{padding:4px 22px 22px;font-size:14.5px;color:var(--t2);line-height:1.85;}
.accordion-item-faq.expanded{border-left:3px solid transparent !important;border-image:var(--grad) 1;}

/* ---------- form ---------- */
.consult{background:linear-gradient(180deg,#F6F4FF 0%,#FFFFFF 100%);}
.form-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh);}
.form-label{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:8px;}
.form-control,.form-select{
  border-radius:var(--r-sm);border:1px solid var(--border);padding:12px 16px;
  font-size:14.5px;color:var(--t1);background:#fff;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.form-control::placeholder{color:var(--t3);}
.form-control:focus,.form-select:focus{
  border-color:rgba(122,92,255,.7);box-shadow:0 0 0 4px rgba(122,92,255,.13);outline:none;
}
.chip-group{display:flex;flex-wrap:wrap;gap:10px;}
.chip-input{position:absolute;opacity:0;width:0;height:0;}
.chip-label{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  border:1px solid var(--border);background:#fff;font-size:13.5px;color:var(--t2);cursor:pointer;
  transition:all .2s ease-out;
}
.chip-label:hover{border-color:rgba(122,92,255,.5);color:var(--p);}
.chip-input:checked + .chip-label{background-image:var(--grad);color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(122,92,255,.22);}
.chip-input:focus-visible + .chip-label{outline:3px solid rgba(122,92,255,.35);outline-offset:2px;}
.trust-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:28px;height:100%;display:flex;flex-direction:column;gap:18px;}
.trust-item{display:flex;gap:12px;font-size:14px;color:var(--t2);line-height:1.75;}
.trust-item svg{width:20px;height:20px;flex:0 0 20px;stroke:var(--p);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;margin-top:3px;}
.trust-badges{display:flex;flex-wrap:wrap;gap:10px;}
.form-check-input:checked{background-color:var(--p);border-color:var(--p);}
.form-check-input:focus{box-shadow:0 0 0 4px rgba(122,92,255,.16);}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:78px 0 0;}
.site-footer .f-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.site-footer .f-brand-name{font-size:20px;font-weight:800;color:#fff;letter-spacing:.4px;}
.site-footer h4{color:#fff;font-size:15.5px;font-weight:700;margin-bottom:18px;}
.f-links li{margin-bottom:11px;}
.f-links a{color:rgba(255,255,255,.72);font-size:14px;}
.f-links a:hover{color:#fff;}
.f-text{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);}
.f-divider{height:1px;background:linear-gradient(90deg,rgba(122,92,255,.6),rgba(255,95,162,.5),rgba(47,224,208,.5));margin:44px 0 22px;border:0;opacity:.8;}
.f-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.55);padding-bottom:28px;}
.f-keywords{font-size:13px;color:rgba(255,255,255,.55);line-height:1.9;}

/* ---------- responsive ---------- */
@media (max-width:1399px){
  .hero-badges{right:24px;}
}
@media (max-width:1199px){
  .hero h1{font-size:40px;}
  .hero{padding:152px 0 84px;}
  .metric-num{font-size:38px;}
  .logo-grid{grid-template-columns:repeat(4,1fr);}
}
@media (max-width:991px){
  .site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--border);}
  .site-header .brand-name{color:var(--t1);}
  .navbar-toggler{background:#fff;border-color:var(--border);}
  .toggler-bars span{background:var(--t1);}
  .section{padding:64px 0;}
  .compare{padding:64px 0;}
  .hero{padding:132px 0 72px;}
  .hero h1{font-size:34px;}
  .hero-badges{position:static;margin-top:32px;flex-wrap:wrap;}
  .hero-badge{flex:1 1 140px;}
  .sec-title{font-size:27px;}
  .timeline{flex-direction:column;gap:26px;}
  .tl-item{padding-top:0;padding-left:36px;}
  .tl-item::before{top:14px;left:9px;right:auto;bottom:-26px;width:1px;height:auto;}
  .tl-dot{top:4px;left:0;}
  .logo-grid{grid-template-columns:repeat(2,1fr);}
  .review-card.offset{margin-top:0;}
}
@media (max-width:767px){
  .hero{padding:118px 0 58px;background-position:center 30%;}
  .hero h1{font-size:30px;}
  .hero-lead{font-size:15px;}
  .section{padding:48px 0;}
  .section-sm{padding:44px 0;}
  .compare{padding:52px 0;}
  .v-card-body{padding:20px;}
  .form-card{padding:22px;}
  .trust-card{padding:22px;}
  .sec-title{font-size:23px;}
  .metric-num{font-size:34px;}
  .news-side-item{flex-direction:column;}
  .news-thumb{width:100%;flex:0 0 auto;height:auto;aspect-ratio:16/9;}
  .btn-brand,.btn-ghost,.btn-ghost-dark{width:100%;justify-content:center;}
  .hero-actions{gap:12px;}
  .qa-card{flex:0 0 84%;}
  .logo-grid{grid-template-columns:repeat(2,1fr);}
  .f-bottom{font-size:12.5px;}
}
@media (max-width:575px){
  .metric-num{font-size:30px;}
  .hb-num{font-size:26px;}
  .hero h1{font-size:27px;}
  .hero-badges{gap:10px;}
  .logo-grid{grid-template-columns:repeat(2,1fr);}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --p:#7A5CFF; --c:#2FE0D0; --k:#FF5FA2; --y:#FFC53D;
  --bg:#F6F4FF; --card:#FFFFFF; --dark:#191634; --border:#E8E4FA;
  --t1:#1B1830; --t2:#565173; --t3:#8B87A3;
  --grad:linear-gradient(120deg,#7A5CFF 0%,#FF5FA2 55%,#2FE0D0 100%);
  --r-lg:24px; --r-md:16px; --r-sm:12px;
  --sh:0 12px 32px rgba(122,92,255,.12);
  --sh-h:0 20px 48px rgba(122,92,255,.22);
  --bs-primary:#7A5CFF; --bs-body-bg:#F6F4FF; --bs-body-color:#1B1830;
  --bs-border-color:#E8E4FA; --bs-border-radius:16px; --bs-border-radius-lg:24px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--t1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
body.solid-header{padding-top:74px;}
img{max-width:100%;display:block;}
a{color:var(--p);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--k);}
button,input,select,textarea{font-family:inherit;}
ul{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;color:var(--t1);}
p{margin:0;}
.container{max-width:1320px;padding-left:24px;padding-right:24px;}
.num{font-variant-numeric:tabular-nums;}
::selection{background:rgba(122,92,255,.22);}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(122,92,255,.35);border-radius:8px;}
/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.site-header.scrolled{
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 24px rgba(27,24,48,.06);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.brand{display:inline-flex;align-items:center;gap:10px;padding:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 38px;
  box-shadow:0 8px 20px rgba(122,92,255,.28);
}
.brand-mark svg{width:18px;height:18px;fill:#fff;}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.4px;color:#fff;transition:color .25s ease-out;}
.site-header.scrolled .brand-name{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.main-nav .nav-link{
  position:relative;font-size:15px;font-weight:500;color:rgba(255,255,255,.86);
  padding:8px 14px !important;transition:color .2s ease-out;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.main-nav .nav-link:hover::after,.main-nav .nav-link.active::after{transform:scaleX(1);}
.main-nav .nav-link:hover,.main-nav .nav-link.active{color:#fff;}
.site-header.scrolled .main-nav .nav-link{color:var(--t2);}
.site-header.scrolled .main-nav .nav-link:hover,.site-header.scrolled .main-nav .nav-link.active{color:var(--t1);}
.icon-btn{
  width:40px;height:40px;border-radius:999px;border:1px solid rgba(255,255,255,.3);
  background:rgba(255,255,255,.12);display:inline-flex;align-items:center;justify-content:center;
  color:#fff;transition:all .2s ease-out;
}
.icon-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;}
.icon-btn:hover{background:rgba(255,255,255,.24);}
.site-header.scrolled .icon-btn{border-color:var(--border);background:#fff;color:var(--t2);}
.site-header.scrolled .icon-btn:hover{border-color:var(--p);color:var(--p);}
.btn-brand{
  display:inline-flex;align-items:center;gap:8px;
  background-image:var(--grad);background-size:180% 180%;background-position:0% 50%;
  color:#fff !important;border:0;border-radius:999px;padding:12px 26px;
  font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;
  box-shadow:0 10px 26px rgba(122,92,255,.22);
  transition:background-position .25s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-brand:hover{background-position:100% 50%;transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,95,162,.32);}
.btn-brand .arrow{transition:transform .2s ease-out;display:inline-flex;}
.btn-brand:hover .arrow{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);
  color:var(--p) !important;border-radius:999px;padding:11px 24px;font-size:15px;font-weight:600;line-height:1.2;
  transition:all .2s ease-out;
}
.btn-ghost:hover{background:var(--bg);border-color:rgba(122,92,255,.55);transform:translateY(-2px);}
.btn-brand-sm{border-radius:14px;padding:9px 18px;font-size:14px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--p);}
.text-link::after{content:"→";transition:transform .2s ease-out;display:inline-block;}
.text-link:hover::after{transform:translateX(4px);}
.navbar-toggler{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:12px;padding:8px 10px;}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(122,92,255,.35);}
.toggler-bars{display:block;width:20px;}
.toggler-bars span{display:block;height:2px;border-radius:2px;background:#fff;margin:4px 0;transition:background .25s ease-out;}
.site-header.scrolled .toggler-bars span{background:var(--t1);}
.offcanvas{border-radius:24px 0 0 24px;}
.offcanvas-header{border-bottom:1px solid var(--border);padding:22px 24px;}
.offcanvas-body{padding:20px 24px 32px;}
.m-nav-link{display:block;padding:13px 4px;font-size:16px;font-weight:600;color:var(--t1);border-bottom:1px dashed var(--border);}
.m-nav-link:hover{color:var(--p);}
.btn-close-custom{width:36px;height:36px;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--t2);display:inline-flex;align-items:center;justify-content:center;font-size:16px;line-height:1;}
/* ---------- pill bar ---------- */
.pill-bar{
  background:#fff;border-bottom:1px solid var(--border);
  padding:14px 0;position:relative;
}
.pill-track{
  display:flex;gap:10px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:2px 4px 6px;-webkit-overflow-scrolling:touch;
}
.pill-track::-webkit-scrollbar{display:none;}
.pill-track{scrollbar-width:none;}
.pill{
  scroll-snap-align:start;flex:0 0 auto;
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;
  border-radius:999px;border:1px solid var(--border);background:#fff;
  color:var(--t2) !important;font-size:14px;font-weight:600;white-space:nowrap;
  transition:all .2s ease-out;
}
.pill::before{content:"";width:6px;height:6px;border-radius:999px;background:transparent;transition:background .2s ease-out;}
.pill:hover{border-color:rgba(122,92,255,.5);background:var(--bg);color:var(--t1) !important;}
.pill.active{
  background-image:var(--grad);background-size:180% 180%;color:#fff !important;border-color:transparent;
  box-shadow:0 10px 24px rgba(122,92,255,.24);
}
.pill.active::before{background:#fff;}
/* ---------- section base ---------- */
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
.sec-head{margin-bottom:40px;}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.6px;
  color:var(--p);text-transform:uppercase;margin-bottom:12px;
}
.sec-eyebrow::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--grad);display:inline-block;}
.sec-title{font-size:32px;font-weight:700;letter-spacing:-.2px;}
.sec-title em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.sec-sub{color:var(--t2);font-size:15.5px;margin-top:12px;max-width:760px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;
  border:1px solid var(--border);background:#fff;font-size:12.5px;font-weight:600;color:var(--t2);
}
.chip-grad{
  border:1px solid transparent;
  background-image:linear-gradient(#fff,#fff),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;color:var(--t1);
}
.dot{width:7px;height:7px;border-radius:999px;background:var(--k);display:inline-block;}
/* ---------- category hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  padding:64px 0 56px;
  background:
    linear-gradient(120deg,rgba(122,92,255,.10) 0%,rgba(255,95,162,.07) 55%,rgba(47,224,208,.10) 100%),
    #FFFFFF;
  border-bottom:1px solid var(--border);
}
.cat-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:var(--grad);opacity:.10;filter:blur(10px);pointer-events:none;
}
.cat-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
  background-image:linear-gradient(#fff,#fff),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;border:1px solid transparent;
  font-size:13px;font-weight:700;color:var(--t1);margin-bottom:18px;
}
.cat-hero h1{font-size:40px;font-weight:800;line-height:1.18;letter-spacing:-.4px;max-width:840px;}
.cat-hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.cat-desc{color:var(--t2);font-size:16px;margin-top:16px;max-width:760px;}
.cat-badge{
  border-radius:var(--r-lg);background:#fff;border:1px solid var(--border);box-shadow:var(--sh);
  padding:22px 24px;min-width:220px;
}
.cat-badge .big{
  font-size:44px;font-weight:800;line-height:1;
  font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-badge .unit{font-size:14px;font-weight:600;color:var(--t2);margin-left:6px;}
.cat-badge .lbl{font-size:13.5px;color:var(--t3);margin-top:8px;}
/* ---------- crumb + stats ---------- */
.crumb-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 0;
}
.crumb{font-size:13.5px;color:var(--t3);display:flex;align-items:center;gap:8px;}
.crumb a{color:var(--t2);}
.crumb a:hover{color:var(--p);}
.crumb .sep{color:#C9C4E4;}
.stat-row{display:flex;flex-wrap:wrap;gap:10px;}
.mini-badge{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;
  border:1px solid transparent;
  background-image:linear-gradient(rgba(255,255,255,.92),rgba(255,255,255,.92)),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;
  font-size:13px;color:var(--t2);white-space:nowrap;
}
.mini-badge b{color:var(--t1);font-weight:800;font-variant-numeric:tabular-nums;}
/* ---------- filter bar ---------- */
.filter-bar{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  padding:16px 20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  box-shadow:0 8px 24px rgba(122,92,255,.07);
}
.filter-label{font-size:13.5px;font-weight:700;color:var(--t2);}
.fchip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--border);background:#fff;color:var(--t2);font-size:13.5px;font-weight:600;
  cursor:pointer;transition:all .2s ease-out;
}
.fchip:hover{border-color:rgba(122,92,255,.5);color:var(--t1);}
.fchip.active{background-image:var(--grad);background-size:180% 180%;color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(122,92,255,.22);}
.sort-select{
  margin-left:auto;height:40px;border-radius:var(--r-sm);border:1px solid var(--border);
  background:#fff;color:var(--t1);font-size:13.5px;padding:0 14px;min-width:168px;
}
.sort-select:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(122,92,255,.18);}
/* ---------- content cards ---------- */
.card-shell{
  position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card-shell::before{
  content:"";position:absolute;left:0;top:0;height:3px;width:0;background:var(--grad);
  transition:width .25s ease-out;z-index:3;
}
.card-shell:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:rgba(122,92,255,.28);}
.card-shell:hover::before{width:100%;}
.card-cover{position:relative;aspect-ratio:4/3;overflow:hidden;background:linear-gradient(120deg,#7A5CFF,#FF5FA2,#2FE0D0);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.card-shell:hover .card-cover img{transform:scale(1.04);}
.card-no{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:4px 10px;border-radius:8px;background:rgba(25,22,52,.72);color:#fff;
  font-size:12px;font-weight:700;letter-spacing:.5px;font-variant-numeric:tabular-nums;
}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;
  border:1px solid var(--border);background:#FBFAFF;font-size:12px;font-weight:600;color:var(--t2);
}
.card-title{font-size:19px;font-weight:700;line-height:1.4/* */;margin-bottom:8px;}
.card-title a{color:var(--t1);}
.card-shell:hover .card-title a{color:var(--p);}
.card-text{font-size:14px;color:var(--t2);line-height:1.7;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--t3);
}
.card-foot .cat{color:var(--p);font-weight:700;}
.more-wrap{display:flex;justify-content:center;margin-top:44px;}
/* ---------- topic list ---------- */
.topic-item{
  display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);padding:16px;height:100%;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.topic-item:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:rgba(122,92,255,.28);}
.topic-thumb{width:96px;height:96px;flex:0 0 96px;border-radius:16px;overflow:hidden;background:linear-gradient(120deg,#7A5CFF,#2FE0D0);}
.topic-thumb img{width:100%;height:100%;object-fit:cover;}
.topic-item h3{font-size:16.5px;margin-bottom:6px;}
.topic-item h3 a{color:var(--t1);}
.topic-item h3 a:hover{color:var(--p);}
.topic-item p{font-size:13.5px;color:var(--t2);}
/* ---------- dark summary ---------- */
.summary-dark{
  background:var(--dark);border-radius:var(--r-lg);color:#fff;padding:40px;position:relative;overflow:hidden;
}
.summary-dark::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:320px;height:320px;border-radius:50%;
  background:var(--grad);opacity:.20;filter:blur(20px);pointer-events:none;
}
.summary-dark h2{color:#fff;font-size:26px;}
.summary-dark .lead{color:rgba(255,255,255,.72);font-size:14.5px;margin-top:10px;max-width:560px;}
.dark-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:28px;position:relative;z-index:2;}
.dstat{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:18px 20px;
}
.dstat .v{font-size:34px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;color:#fff;}
.dstat .v small{font-size:14px;font-weight:600;color:rgba(255,255,255,.72);margin-left:4px;}
.dstat .k{font-size:12.5px;color:rgba(255,255,255,.72);margin-top:8px;}
.trend{display:flex;align-items:flex-end;gap:8px;height:96px;margin-top:28px;position:relative;z-index:2;}
.trend i{
  flex:1 1 0;border-radius:8px 8px 4px 4px;background-image:var(--grad);background-size:100% 100%;
  opacity:.86;display:block;
}
.trend-cap{font-size:12.5px;color:rgba(255,255,255,.6);margin-top:10px;position:relative;z-index:2;}
/* ---------- quick answers ---------- */
.qa-track{
  display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 16px;
  -webkit-overflow-scrolling:touch;
}
.qa-track::-webkit-scrollbar{display:none;}
.qa-track{scrollbar-width:none;}
.qa-card{
  scroll-snap-align:start;flex:0 0 320px;background:#fff;border:1px solid var(--border);
  border-left:3px solid var(--p);border-radius:var(--r-md);padding:22px 22px 20px;
  display:flex;flex-direction:column;transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.qa-card:hover{transform:translateY(-4px);box-shadow:var(--sh);}
.qa-card .q{font-size:15.5px;font-weight:700;margin-bottom:10px;}
.qa-card .a{font-size:13.5px;color:var(--t2);line-height:1.7;flex:1 1 auto;}
.qa-card .ico{align-self:flex-end;width:28px;height:28px;border-radius:999px;border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;color:var(--p);font-size:15px;margin-top:14px;font-weight:700;}
/* ---------- subscribe ---------- */
.sub-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  padding:36px;box-shadow:var(--sh);display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
}
.sub-card h2{font-size:24px;}
.sub-card p{font-size:14px;color:var(--t2);margin-top:8px;max-width:520px;}
.sub-form{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}
.sub-input{
  height:48px;min-width:280px;border-radius:var(--r-sm);border:1px solid var(--border);
  background:#FBFAFF;padding:0 16px;font-size:14.5px;color:var(--t1);
  transition:border-color .2s ease-out,box-shadow .2s ease-out,background .2s ease-out;
}
.sub-input::placeholder{color:var(--t3);}
.sub-input:focus{outline:none;background:#fff;border-color:var(--p);box-shadow:0 0 0 4px rgba(122,92,255,.16);}
.privacy{font-size:12.5px;color:var(--t3);margin-top:12px;width:100%;}
/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 32px;margin-top:0;}
.f-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.f-brand-name{font-size:19px;font-weight:800;color:#fff;letter-spacing:.4px;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:700;}
.f-text{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.72);}
.f-keywords{font-size:12.5px;color:rgba(255,255,255,.55);}
.f-links li{margin-bottom:10px;}
.f-links a{font-size:13.5px;color:rgba(255,255,255,.72);}
.f-links a:hover{color:#fff;}
.f-divider{border:0;height:1px;background:var(--grad);opacity:.55;margin:40px 0 22px;}
.f-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.55);}
/* ---------- responsive ---------- */
@media (max-width:1399.98px){
  .container{max-width:1200px;}
}
@media (max-width:1199.98px){
  .section{padding:76px 0;}
  .cat-hero h1{font-size:36px;}
  .dark-stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  body.solid-header{padding-top:68px;}
  .section{padding:64px 0;}
  .cat-hero{padding:48px 0 44px;}
  .cat-hero h1{font-size:32px;}
  .sec-title{font-size:27px;}
  .cat-badge{margin-top:24px;display:inline-block;}
  .summary-dark{padding:30px;}
}
@media (max-width:767.98px){
  .section{padding:48px 0;}
  .container{padding-left:16px;padding-right:16px;}
  .cat-hero h1{font-size:28px;}
  .cat-hero{padding:40px 0 36px;}
  .cat-desc{font-size:15px;}
  .sec-title{font-size:24px;}
  .card-body{padding:20px;}
  .card-cover{aspect-ratio:16/9;}
  .qa-card{flex:0 0 84%;}
  .sub-card{padding:24px;}
  .sub-input{min-width:100%;}
  .sub-form{width:100%;}
  .sub-form .btn-brand{width:100%;justify-content:center;}
  .sort-select{margin-left:0;width:100%;}
  .topic-thumb{width:76px;height:76px;flex:0 0 76px;}
  .site-footer{padding:52px 0 26px;}
}
@media (max-width:575.98px){
  .cat-badge .big{font-size:36px;}
  .dstat .v{font-size:28px;}
  .dark-stats{grid-template-columns:repeat(2,1fr);gap:12px;}
  .crumb-bar{flex-direction:column;align-items:flex-start;}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}