/* roulang page: index */
:root{
  --c-bg:#0B0B14;
  --c-bg-alt:#12121E;
  --c-surface:#171727;
  --c-surface-2:#1E1E30;
  --c-primary:#6C4CF1;
  --c-primary-deep:#4A2FD0;
  --c-primary-soft:rgba(108,76,241,.12);
  --c-accent:#22D3EE;
  --c-lime:#B8FF3C;
  --c-text:#F2F3F8;
  --c-text-2:#A7A9BE;
  --c-text-3:#6E7085;
  --c-line:rgba(255,255,255,.08);
  --c-line-soft:rgba(255,255,255,.05);
  --c-ok:#34D399;
  --c-warn:#FFB020;
  --c-err:#FF5C7A;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 44px rgba(108,76,241,.22);
  --maxw:1200px;
  --sp:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1400px){.container{max-width:1280px}}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}

/* ============ 顶部信息条 ============ */
.topbar{background:#080810;border-bottom:1px solid var(--c-line-soft);font-size:13px;color:var(--c-text-2)}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar-left{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-left .dot{width:6px;height:6px;border-radius:50%;background:var(--c-ok);display:inline-block;flex:none}
.topbar-right{display:flex;align-items:center;gap:18px}
.topbar-right a{color:var(--c-text-2)}
.topbar-right a:hover{color:var(--c-accent)}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:1050}
.mainnav{position:relative;background:rgba(11,11,20,.94);border-bottom:1px solid var(--c-line);transition:background .2s ease,box-shadow .2s ease}
.site-header.scrolled .topbar{display:none}
.site-header.scrolled .mainnav{background:rgba(11,11,20,.98);box-shadow:0 10px 30px rgba(0,0,0,.5)}
.nav-inner{display:flex;align-items:center;height:76px;gap:16px;transition:height .2s ease}
.site-header.scrolled .nav-inner{height:64px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));display:grid;place-items:center;color:#fff;flex:none;box-shadow:0 6px 18px rgba(108,76,241,.35)}
.brand-text{display:block;line-height:1.15}
.brand-name{display:block;font-size:16px;font-weight:800;color:var(--c-text);letter-spacing:.01em;white-space:nowrap}
.brand-sub{display:block;font-size:11px;color:var(--c-text-3);letter-spacing:.06em;margin-top:2px;white-space:nowrap}
.nav-collapse{display:flex;align-items:center;margin-left:auto;gap:16px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links>li>a{display:block;position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:var(--c-text-2);border-radius:8px;white-space:nowrap}
.nav-links>li>a:hover{color:var(--c-text);background:rgba(255,255,255,.05)}
.nav-links>li>a.active{color:var(--c-text)}
.nav-links>li>a.active::after{content:"";position:absolute;left:14px;bottom:2px;width:60%;height:2px;background:var(--c-primary);border-radius:2px}
.nav-right{position:relative;display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:12px 24px;border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;line-height:1.2}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.btn-primary:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(108,76,241,.35)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#B9ABFF;border-color:rgba(108,76,241,.42)}
.btn-ghost:hover{background:var(--c-primary-soft);color:#fff;border-color:rgba(108,76,241,.7);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:disabled,.btn.disabled{opacity:.4;cursor:not-allowed;transform:none}
.mega-toggle{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--c-line);color:var(--c-text-2);padding:9px 14px;border-radius:var(--r-btn);font-size:14px;font-weight:500;cursor:pointer;transition:.18s ease}
.mega-toggle:hover{color:var(--c-text);border-color:rgba(108,76,241,.55)}
.mega-toggle svg{transition:transform .22s ease}
.mega-toggle[aria-expanded="true"]{color:var(--c-primary);border-color:rgba(108,76,241,.6)}
.mega-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.nav-toggle{display:none;margin-left:auto;background:transparent;border:1px solid var(--c-line);border-radius:10px;color:var(--c-text);width:44px;height:40px;place-items:center;cursor:pointer}

/* Mega Menu */
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:860px;max-width:calc(100vw - 48px);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:18px;
  box-shadow:0 28px 64px rgba(0,0,0,.65);padding:24px;
  display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:1200;
}
.mega-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
@media (hover:hover) and (min-width:992px){
  .nav-right:hover .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
}
.mega-col-title{font-size:12px;letter-spacing:.14em;color:var(--c-text-3);font-weight:700;text-transform:uppercase;margin-bottom:14px}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.mega-cats a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--c-text-2)}
.mega-cats a:hover{background:rgba(255,255,255,.06);color:var(--c-primary)}
.mega-cats span.ic{width:26px;height:26px;border-radius:8px;background:var(--c-primary-soft);display:grid;place-items:center;color:var(--c-accent);flex:none}
.mega-news a{display:block;padding:10px 0;border-bottom:1px solid var(--c-line-soft);font-size:14px;color:var(--c-text-2)}
.mega-news a:last-child{border-bottom:none}
.mega-news a:hover{color:var(--c-primary)}
.mega-news time{display:block;font-size:12px;color:var(--c-text-3);margin-top:2px}
.mega-entry{display:block;border-radius:14px;overflow:hidden;border:1px solid var(--c-line);background:var(--c-surface-2);transition:.18s ease}
.mega-entry img{aspect-ratio:16/10;width:100%;object-fit:cover}
.mega-entry:hover{border-color:rgba(108,76,241,.45);transform:translateY(-3px)}
.mega-entry-body{padding:12px 14px}
.mega-entry-body strong{font-size:14px;display:block}
.mega-entry-body em{font-style:normal;font-size:12px;color:var(--c-text-3);display:block;margin-top:4px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:88px 0 108px;background:var(--c-bg)}
.hero-grid-bg{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 72% 18%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 72% 18%,#000 0%,transparent 72%);
}
.hero-glow{position:absolute;top:-260px;right:-180px;width:760px;height:760px;pointer-events:none;
  background:radial-gradient(circle,rgba(108,76,241,.26),transparent 66%)}
.hero .container{position:relative;z-index:2}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--c-accent);background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.22);padding:6px 14px;border-radius:999px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-lime);display:block}
.hero h1{font-size:clamp(28px,4vw,42px);line-height:1.24;font-weight:800;margin-top:22px;max-width:20ch}
.hero-sub{margin-top:20px;font-size:17px;color:var(--c-text-2);max-width:46ch;line-height:1.8}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-list{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:36px}
.trust-list li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-text-2)}
.trust-list svg{color:var(--c-lime);flex:none}
.hero-visual{position:relative}
.hero-visual>img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:16px;border:1px solid var(--c-line);background:var(--c-surface-2);box-shadow:0 24px 60px rgba(0,0,0,.55)}
.float-card{position:absolute;left:-22px;bottom:26px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:14px;padding:16px 20px;min-width:196px;box-shadow:0 18px 44px rgba(0,0,0,.6)}
.float-num{font-size:34px;font-weight:800;color:var(--c-lime);line-height:1;font-variant-numeric:tabular-nums}
.float-num span{font-size:16px;margin-left:2px}
.float-label{font-size:13px;color:var(--c-text-2);margin-top:8px}
.float-bar{height:4px;border-radius:4px;background:rgba(255,255,255,.08);margin-top:12px;overflow:hidden}
.float-bar i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}

/* ============ KPI ============ */
.kpi-band{position:relative;z-index:3;margin-top:-52px;padding-bottom:8px}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kpi-card{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px 24px 22px;box-shadow:var(--sh-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.kpi-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.35);box-shadow:var(--sh-hover)}
.kpi-icon{position:absolute;top:20px;right:20px;color:var(--c-text-3)}
.kpi-num{font-size:42px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.kpi-num.is-lime{color:var(--c-lime)}
.kpi-num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--c-text-2)}
.kpi-label{margin-top:12px;font-size:14px;color:var(--c-text-2)}
.kpi-note{margin-top:6px;font-size:12px;color:var(--c-text-3);border-top:1px solid var(--c-line-soft);padding-top:10px}

/* ============ 区块通用 ============ */
.section{padding:96px 0}
.section-alt{background:var(--c-bg-alt)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head-main{border-left:3px solid var(--c-primary);padding-left:16px}
.section-index{display:block;font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--c-text-3);margin-bottom:8px}
.section-head h2{font-size:clamp(23px,2.6vw,32px);font-weight:800}
.section-head p{margin-top:12px;font-size:15px;color:var(--c-text-2);max-width:62ch}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-accent);white-space:nowrap}
.arrow-link svg{transition:transform .18s ease}
.arrow-link:hover{color:#7FE9FA}
.arrow-link:hover svg{transform:translateX(4px)}

/* ============ 卡片 ============ */
.card-base{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;height:100%}
.card-base:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.38);box-shadow:var(--sh-hover)}
.svc-lg{display:grid;grid-template-columns:1.05fr 1fr;overflow:hidden;height:100%;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.svc-lg:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.38);box-shadow:var(--sh-hover)}
.svc-lg-media{background:var(--c-surface-2);min-height:300px}
.svc-lg-media img{width:100%;height:100%;object-fit:cover}
.svc-lg-body{padding:34px 32px;display:flex;flex-direction:column}
.svc-lg-body h3{font-size:22px;margin-bottom:14px}
.svc-lg-body p{font-size:15px;color:var(--c-text-2)}
.svc-points{margin-top:20px;display:grid;gap:10px}
.svc-points li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2)}
.svc-points li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--c-primary);border-radius:2px}
.svc-lg-body .arrow-link{margin-top:auto;padding-top:24px}
.svc-sm{padding:26px 24px;display:flex;flex-direction:column;gap:12px}
.svc-sm .ic{width:42px;height:42px;border-radius:12px;background:var(--c-primary-soft);display:grid;place-items:center;color:var(--c-accent)}
.svc-sm h3{font-size:17px}
.svc-sm p{font-size:14px;color:var(--c-text-2);line-height:1.7}
.svc-sm .arrow-link{margin-top:auto;padding-top:8px}

/* ============ 结果对比 ============ */
.seg-toggle{display:inline-flex;background:var(--c-surface);border:1px solid var(--c-line);border-radius:12px;padding:4px;gap:4px}
.seg-btn{background:transparent;border:none;color:var(--c-text-2);font-size:14px;font-weight:600;padding:8px 18px;border-radius:9px;cursor:pointer;transition:.18s ease}
.seg-btn:hover{color:var(--c-text)}
.seg-btn.active{background:var(--c-primary);color:#fff}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{border-radius:var(--r-card);border:1px solid var(--c-line);background:rgba(255,255,255,.02);padding:34px 32px}
.compare-card h3{font-size:19px;margin-bottom:8px}
.compare-card .sub{font-size:13px;color:var(--c-text-3);margin-bottom:22px}
.compare-card.is-best{border-color:rgba(108,76,241,.5);background:linear-gradient(180deg,rgba(108,76,241,.12),rgba(108,76,241,.02));box-shadow:var(--sh-hover)}
.compare-card.is-muted{opacity:.92}
.compare-list{display:grid;gap:14px}
.compare-list li{display:flex;gap:12px;font-size:15px;color:var(--c-text-2);line-height:1.7}
.compare-list .mk{flex:none;width:20px;height:20px;border-radius:6px;display:grid;place-items:center;margin-top:3px}
.compare-card.is-best .mk{background:rgba(52,211,153,.14);color:var(--c-ok)}
.compare-card.is-muted .mk{background:rgba(255,255,255,.06);color:var(--c-text-3)}

/* ============ 最新信息 ============ */
.news-card{display:flex;flex-direction:column;overflow:hidden;height:100%;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.news-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.38);box-shadow:var(--sh-hover)}
.news-cover{display:block;aspect-ratio:16/9;background:var(--c-surface-2);overflow:hidden}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge-soft{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--c-accent);background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.25);padding:3px 10px;border-radius:999px;align-self:flex-start}
.news-title{font-size:17px;font-weight:700;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.news-title a:hover{color:var(--c-primary)}
.news-excerpt{font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-text-3);border-top:1px solid var(--c-line-soft);padding-top:12px}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;padding:64px 24px;border:1px dashed var(--c-line);border-radius:var(--r-card);background:var(--c-surface);color:var(--c-text-2);text-align:center}
.empty-state svg{color:var(--c-text-3)}

/* ============ 流程条 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-top:34px}
.step-line{position:absolute;top:5px;left:22px;right:-24px;height:1px;background:var(--c-line)}
.step:last-child .step-line{display:none}
.step-dot{position:absolute;top:0;left:0;width:12px;height:12px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 0 4px rgba(108,76,241,.16);z-index:1}
.step-num{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--c-text-3)}
.step h3{font-size:17px;margin-top:8px}
.step p{font-size:14px;color:var(--c-text-2);margin-top:8px;line-height:1.7}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{background:transparent;border:none;border-bottom:1px solid var(--c-line)}
.accordion-button{position:relative;width:100%;text-align:left;background:transparent;color:var(--c-text);font-size:18px;font-weight:600;line-height:1.55;padding:22px 52px 22px 16px;border:none;border-left:3px solid transparent;box-shadow:none;border-radius:0;transition:color .18s ease,background .18s ease,border-color .18s ease}
.accordion-button:hover{color:var(--c-primary)}
.accordion-button:not(.collapsed){color:var(--c-primary);border-left-color:var(--c-primary);background:rgba(108,76,241,.06)}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--c-lime);outline-offset:-2px}
.accordion-button::after,.accordion-button::before{content:"";position:absolute;right:20px;top:50%;background:var(--c-accent);border-radius:2px;transition:transform .18s ease,opacity .18s ease}
.accordion-button::after{width:14px;height:2px;transform:translateY(-50%)}
.accordion-button::before{width:2px;height:14px;right:26px;transform:translateY(-50%)}
.accordion-button:not(.collapsed)::before{transform:translateY(-50%) rotate(90deg);opacity:0}
.accordion-button:not(.collapsed)::after{background:var(--c-lime)}
.accordion-body{padding:0 52px 24px 16px;font-size:15px;line-height:1.85;color:var(--c-text-2)}

/* ============ 表单 ============ */
.form-section{position:relative;overflow:hidden}
.form-section::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px}
.form-section .container{position:relative;z-index:2}
.form-panel{background:var(--c-surface);border:1px solid var(--c-line);border-radius:18px;padding:34px 32px;box-shadow:var(--sh-card)}
.form-panel h3{font-size:20px;margin-bottom:6px}
.form-panel .lead{font-size:14px;color:var(--c-text-3);margin-bottom:26px}
.form-label{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:8px;font-weight:500}
.form-control,.form-select{display:block;width:100%;background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-text);border-radius:10px;padding:12px 14px;font-size:15px;line-height:1.5;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}
.form-control::placeholder{color:var(--c-text-3)}
.form-control:focus,.form-select:focus{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(108,76,241,.12);color:var(--c-text);outline:none}
.form-select{appearance:none;-webkit-appearance:none;background-color:var(--c-surface);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A7A9BE' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}
.form-select option{background:var(--c-surface);color:var(--c-text)}
.field-error{display:none;font-size:13px;color:var(--c-err);margin-top:6px}
.field.has-error .form-control{border-color:var(--c-err)}
.field.has-error .field-error{display:block}
.form-note{font-size:12px;color:var(--c-text-3);margin-top:12px;line-height:1.7}
.form-alert{display:none;align-items:center;gap:10px;font-size:14px;color:var(--c-ok);background:rgba(52,211,153,.10);border-top:2px solid var(--c-ok);border-radius:10px;padding:12px 16px;margin-bottom:20px}
.form-alert.show{display:flex}
.info-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:18px;padding:32px;height:100%;display:flex;flex-direction:column;gap:22px}
.info-card h3{font-size:19px}
.info-item{display:flex;gap:14px}
.info-item .ic{flex:none;width:40px;height:40px;border-radius:12px;background:var(--c-primary-soft);display:grid;place-items:center;color:var(--c-accent)}
.info-item strong{display:block;font-size:15px;font-weight:600}
.info-item span{display:block;font-size:14px;color:var(--c-text-2);margin-top:2px;overflow-wrap:anywhere}
.info-divider{height:1px;background:var(--c-line-soft)}
.info-list{display:grid;gap:10px}
.info-list li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2)}
.info-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--c-lime)}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:#08080F;padding-top:64px;margin-top:0}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--c-text-2);max-width:34ch;line-height:1.8}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);display:grid;place-items:center;color:var(--c-text-2);transition:.18s ease}
.socials a:hover{color:var(--c-primary);border-color:rgba(108,76,241,.5);background:var(--c-primary-soft);transform:translateY(-2px)}
.footer-title{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--c-text);display:flex;align-items:center;justify-content:space-between}
.footer-title .acc-arrow{display:none;transition:transform .18s ease;color:var(--c-text-3)}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:14px;color:var(--c-text-2)}
.footer-links a:hover{color:var(--c-accent)}
.footer-contact li{font-size:14px;color:var(--c-text-2);margin-bottom:12px;line-height:1.7;overflow-wrap:anywhere}
.footer-contact li strong{color:var(--c-text);font-weight:600;margin-right:6px}
.footer-bottom{border-top:1px solid var(--c-line-soft);padding:22px 0 26px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--c-text-3)}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-accent)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.in{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 断点 ============ */
@media (max-width:1199.98px){
  .mega-panel{width:720px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:991.98px){
  .nav-links>li>a{padding:10px 12px;font-size:14px}
  .hero{padding:64px 0 96px}
  .section{padding:72px 0}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .svc-lg{grid-template-columns:1fr}
  .svc-lg-media{min-height:200px;aspect-ratio:16/9}
  .compare-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .step:nth-child(2) .step-line{display:none}
  .form-panel{padding:28px 24px}
  .info-card{padding:26px 24px}
}
@media (max-width:991.98px){
  .nav-toggle{display:grid}
  .nav-collapse{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:#101020;border-bottom:1px solid var(--c-line);
    padding:18px 24px 26px;flex-direction:column;align-items:stretch;gap:14px;
    max-height:calc(100vh - 80px);overflow-y:auto;box-shadow:0 22px 44px rgba(0,0,0,.6);
  }
  .nav-collapse.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px;width:100%}
  .nav-links>li>a{padding:13px 10px;border-radius:10px;border-bottom:1px solid var(--c-line-soft)}
  .nav-links>li>a.active::after{left:10px;bottom:6px;width:36px}
  .nav-right{flex-direction:column;align-items:stretch;gap:10px;margin-top:6px}
  .nav-right .btn{width:100%}
  .mega-toggle{width:100%;justify-content:space-between}
  .mega-panel{
    position:static;width:100%;max-width:100%;display:none;transform:none;opacity:1;visibility:visible;
    box-shadow:none;background:#12121E;border-radius:14px;padding:18px;
    grid-template-columns:1fr;gap:18px;margin-top:10px;
  }
  .mega-panel.open{display:grid}
  .nav-right:hover .mega-panel{opacity:1;visibility:visible;transform:none}
}
@media (max-width:767.98px){
  .container{padding-left:16px;padding-right:16px}
  .topbar{display:none}
  .nav-inner{height:64px;gap:10px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:10px}
  .hero{padding:48px 0 84px}
  .hero h1{font-size:26px}
  .hero-sub{font-size:15px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .float-card{left:12px;right:12px;bottom:12px;min-width:0;padding:14px 16px}
  .float-num{font-size:28px}
  .kpi-band{margin-top:-36px}
  .kpi-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .kpi-card{padding:20px 16px 18px}
  .kpi-num{font-size:30px}
  .kpi-label{font-size:13px}
  .section{padding:52px 0}
  .section-head{margin-bottom:30px}
  .svc-lg-body{padding:24px 20px}
  .svc-sm{padding:22px 18px}
  .compare-card{padding:24px 20px}
  .accordion-button{font-size:16px;padding:18px 46px 18px 14px}
  .accordion-body{padding:0 20px 20px 14px}
  .steps{grid-template-columns:1fr;gap:26px}
  .step-line{display:none}
  .step{padding-top:30px;padding-left:26px}
  .step-dot{top:2px;left:0}
  .footer-grid{grid-template-columns:1fr;gap:0;padding-bottom:24px}
  .footer-brand{grid-column:auto;padding-bottom:24px}
  .footer-col--acc{border-top:1px solid var(--c-line-soft)}
  .footer-col--acc .footer-title{margin:0;padding:16px 0;cursor:pointer}
  .footer-col--acc .footer-title .acc-arrow{display:block}
  .footer-col--acc.open .footer-title .acc-arrow{transform:rotate(180deg)}
  .footer-col--acc .footer-links,.footer-col--acc .footer-contact{display:none;padding-bottom:18px}
  .footer-col--acc.open .footer-links,.footer-col--acc.open .footer-contact{display:grid}
  .footer-col--acc.open .footer-contact{display:block}
  .footer-bottom{justify-content:center;text-align:center}
}
@media (max-width:520px){
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .seg-toggle{width:100%}
  .seg-btn{flex:1;padding:8px 10px;font-size:13px}
}

/* roulang page: category1 */
/* ============ 变量 ============ */
:root{
  --c-bg:#0B0B14;
  --c-bg-alt:#12121E;
  --c-surface:#171727;
  --c-surface-2:#1E1E30;
  --c-primary:#6C4CF1;
  --c-primary-deep:#4A2FD0;
  --c-primary-soft:rgba(108,76,241,.12);
  --c-accent:#22D3EE;
  --c-lime:#B8FF3C;
  --c-text:#F2F3F8;
  --c-text-2:#A7A9BE;
  --c-text-3:#6E7085;
  --c-line:rgba(255,255,255,.08);
  --c-line-soft:rgba(255,255,255,.05);
  --c-ok:#34D399;
  --c-warn:#FFB020;
  --c-err:#FF5C7A;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 44px rgba(108,76,241,.22);
  --ff:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{color:var(--c-text)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;overflow-wrap:break-word}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px}
::selection{background:rgba(108,76,241,.45);color:#fff}
/* ============ 容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1400px){.container{max-width:1280px}}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}
/* ============ 顶部信息条 ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(11,11,20,.96)}
.topbar{height:38px;font-size:12.5px;color:var(--c-text-3);border-bottom:1px solid var(--c-line-soft)}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.topbar-left{display:flex;align-items:center;letter-spacing:.02em}
.dot{width:6px;height:6px;border-radius:50%;background:var(--c-lime);display:inline-block;margin-right:8px;box-shadow:0 0 8px rgba(184,255,60,.8)}
.topbar-right{display:flex;gap:20px}
.topbar-right a{color:var(--c-text-3)}
.topbar-right a:hover{color:var(--c-accent)}
/* ============ 主导航 ============ */
.mainnav{height:76px;border-bottom:1px solid var(--c-line);background:rgba(11,11,20,.96);transition:height .25s ease}
.site-header.is-stuck .mainnav{height:64px}
.site-header.is-stuck .topbar{display:none}
.nav-inner{display:flex;align-items:center;gap:32px;height:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));color:#fff;box-shadow:0 6px 18px rgba(108,76,241,.35)}
.brand-name{display:block;font-size:16px;font-weight:700;letter-spacing:.02em;line-height:1.2;white-space:nowrap}
.brand-sub{display:block;font-size:11px;color:var(--c-text-3);letter-spacing:.08em;line-height:1.4}
.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-text);place-items:center;margin-left:auto}
.nav-collapse{display:flex;align-items:center;justify-content:space-between;gap:24px;flex:1}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{position:relative;display:block;padding:10px 14px;font-size:14.5px;font-weight:500;color:var(--c-text-2);border-radius:8px}
.nav-links a:hover{color:var(--c-text);background:rgba(255,255,255,.05)}
.nav-links a.active{color:#fff}
.nav-links a.active::after{content:"";position:absolute;left:14px;bottom:2px;width:60%;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.nav-right{position:relative;display:flex;align-items:center;gap:12px}
/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);font-weight:600;font-size:15px;padding:12px 24px;border:1px solid transparent;line-height:1.2;transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));color:#fff;box-shadow:0 10px 26px rgba(108,76,241,.32)}
.btn-primary:hover{background:linear-gradient(135deg,var(--c-primary-deep),var(--c-primary));color:#fff;transform:translateY(-2px)}
.btn-secondary{background:transparent;border-color:rgba(108,76,241,.4);color:#C6BCFF}
.btn-secondary:hover{background:var(--c-primary-soft);color:#fff;border-color:var(--c-primary)}
.btn-sm{padding:9px 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-accent)}
.link-arrow svg{transition:transform .18s ease}
.link-arrow:hover{color:#8FF3FF}
.link-arrow:hover svg{transform:translateX(4px)}
/* ============ Mega 面板 ============ */
.mega-toggle{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:var(--r-btn);border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-text-2);font-size:14px;font-weight:500;transition:.18s ease}
.mega-toggle:hover{color:#fff;border-color:rgba(108,76,241,.45)}
.mega-toggle svg{transition:transform .22s ease}
.mega-toggle[aria-expanded="true"]{color:#fff;border-color:var(--c-primary);background:var(--c-primary-soft)}
.mega-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.mega-panel{position:absolute;top:calc(100% + 16px);right:0;width:820px;display:grid;grid-template-columns:1.15fr 1fr .9fr;gap:24px;padding:24px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.6);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:60}
.mega-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col-title{font-size:11.5px;letter-spacing:.1em;color:var(--c-text-3);text-transform:uppercase;margin-bottom:14px}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.mega-cats a{display:flex;align-items:flex-start;gap:8px;padding:10px;border-radius:10px;font-size:14px;color:var(--c-text-2)}
.mega-cats a:hover{background:rgba(255,255,255,.06);color:var(--c-primary)}
.mega-cats .ic{width:26px;height:26px;flex:0 0 26px;border-radius:8px;display:grid;place-items:center;background:var(--c-primary-soft);color:var(--c-accent)}
.mega-news li + li{margin-top:10px}
.mega-news a{display:block;font-size:14px;color:var(--c-text-2);line-height:1.5}
.mega-news a:hover{color:#fff}
.mega-news .date{display:block;font-size:12px;color:var(--c-text-3);margin-top:4px;font-variant-numeric:tabular-nums}
.mega-entry{display:flex;flex-direction:column;gap:10px;padding:14px;border-radius:14px;background:var(--c-surface-2);border:1px solid var(--c-line)}
.mega-entry img{border-radius:10px;aspect-ratio:16/10;object-fit:cover;background:var(--c-surface-2)}
.mega-entry p{font-size:13px;color:var(--c-text-2);margin:0}
.nav-backdrop{position:fixed;inset:0;background:rgba(5,5,12,.6);opacity:0;visibility:hidden;transition:.25s ease;z-index:50}
.nav-backdrop.show{opacity:1;visibility:visible}
/* ============ Banner ============ */
.page-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--c-line);background-color:var(--c-bg-alt);background-image:
  radial-gradient(620px 260px at 86% 8%,rgba(108,76,241,.38),transparent 72%),
  radial-gradient(420px 200px at 62% 120%,rgba(34,211,238,.16),transparent 70%),
  linear-gradient(90deg,rgba(11,11,20,.97) 0%,rgba(11,11,20,.86) 52%,rgba(11,11,20,.58) 100%),
  url("/assets/images/backpic/back-2.png");
  background-position:center,center,center,right center;
  background-size:auto,auto,auto,cover;
  background-repeat:no-repeat}
.page-banner::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}
.banner-inner{position:relative;min-height:240px;padding:46px 0;display:flex;flex-direction:column;justify-content:center;max-width:720px}
.crumb-tag{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;font-size:12px;letter-spacing:.12em;color:#C6BCFF;background:var(--c-primary-soft);border:1px solid rgba(108,76,241,.35);border-radius:999px;padding:6px 14px;margin-bottom:18px}
.page-banner h1{font-size:38px;font-weight:800;line-height:1.25;letter-spacing:.01em;margin-bottom:12px}
.page-banner .banner-sub{font-size:16px;color:var(--c-text-2);max-width:46ch}
/* ============ 面包屑 ============ */
.crumb{border-bottom:1px solid var(--c-line-soft);background:var(--c-bg)}
.crumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:0;padding:14px 0;font-size:13px;color:var(--c-text-3)}
.crumb li{display:flex;align-items:center;overflow-wrap:anywhere}
.crumb li+li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--c-primary);display:inline-block;margin:0 10px;flex:0 0 4px}
.crumb a{color:var(--c-text-2)}
.crumb a:hover{color:var(--c-accent)}
.crumb li[aria-current] {color:var(--c-text-2)}
/* ============ 主体布局 ============ */
.page-main{padding:56px 0 88px}
.block+.block{margin-top:64px}
.sec-head{margin-bottom:28px}
.sec-title{display:flex;align-items:baseline;gap:12px;font-size:26px;font-weight:700;line-height:1.4}
.sec-title::before{content:"";width:3px;height:20px;border-radius:2px;background:linear-gradient(180deg,var(--c-primary),var(--c-accent));flex:0 0 3px;transform:translateY(1px)}
.sec-num{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--c-primary);font-variant-numeric:tabular-nums}
.sec-desc{margin-top:12px;font-size:15px;color:var(--c-text-2);max-width:72ch}
/* ============ 下载卡片 ============ */
.dl-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.dl-card{display:flex;flex-direction:column;gap:12px;padding:24px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.dl-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.4);box-shadow:var(--sh-hover)}
.dl-ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--c-primary-soft);border:1px solid var(--c-line);color:var(--c-accent)}
.dl-card h3{font-size:18px;font-weight:700}
.dl-card p{font-size:14.5px;color:var(--c-text-2);line-height:1.72}
.dl-points{display:flex;flex-direction:column;gap:8px;margin:2px 0 6px}
.dl-points li{position:relative;padding-left:16px;font-size:13.5px;color:var(--c-text-2)}
.dl-points li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--c-primary)}
.dl-card .link-arrow{margin-top:auto;padding-top:6px}
/* ============ 流程条 ============ */
.flow{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-bottom:32px}
.flow::before{content:"";position:absolute;left:12px;right:12px;top:9px;height:1px;background:var(--c-line)}
.flow-step{position:relative;padding-top:34px}
.flow-step .node{position:absolute;top:2px;left:0;width:16px;height:16px;border-radius:50%;background:var(--c-primary);border:3px solid var(--c-bg);box-shadow:0 0 0 1px rgba(108,76,241,.5)}
.flow-step .step-num{display:block;font-size:12px;letter-spacing:.12em;color:var(--c-text-3);margin-bottom:6px;font-variant-numeric:tabular-nums}
.flow-step h3{font-size:16.5px;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--c-text-2)}
/* ============ 图文区块 ============ */
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center;padding:28px;background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:16px}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:var(--c-surface-2);border:1px solid var(--c-line)}
.split-list{display:flex;flex-direction:column;gap:16px}
.split-list li{display:flex;gap:12px}
.split-list .tick{flex:0 0 22px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:rgba(52,211,153,.14);color:var(--c-ok);margin-top:3px}
.split-list strong{display:block;font-size:15.5px;margin-bottom:4px}
.split-list p{font-size:14px;color:var(--c-text-2);margin:0}
/* ============ 侧栏 ============ */
.sidebar-sticky{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-card)}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--c-primary)}
.side-nav li+li{margin-top:6px}
.side-nav a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:10px;font-size:14.5px;color:var(--c-text-2);border:1px solid transparent}
.side-nav a:hover{background:rgba(255,255,255,.05);color:#fff}
.side-nav a.is-current{background:var(--c-primary-soft);border-color:rgba(108,76,241,.4);color:#fff}
.side-nav a.is-current::after{content:"当前";font-size:11px;color:var(--c-accent)}
.side-consult p{font-size:14px;color:var(--c-text-2)}
.side-consult .btn{width:100%;margin-top:16px}
.side-meta{margin-top:16px;padding-top:16px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-text-3);display:flex;flex-direction:column;gap:8px}
.side-meta span{display:flex;align-items:center;gap:8px}
/* ============ FAQ ============ */
.faq-wrap{background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:16px;padding:12px 28px}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line)}
.faq-acc .accordion-item:last-child{border-bottom:0}
.faq-acc .accordion-header{position:relative}
.faq-acc .accordion-button{position:relative;width:100%;background:transparent;border:0;color:var(--c-text);font-size:18px;font-weight:600;text-align:left;padding:22px 48px 22px 18px;border-radius:0;box-shadow:none;transition:color .18s ease,background .18s ease}
.faq-acc .accordion-button:hover{color:#fff}
.faq-acc .accordion-button:not(.collapsed){color:var(--c-primary);box-shadow:inset 3px 0 0 0 var(--c-primary);background:rgba(255,255,255,.02)}
.faq-acc .accordion-button::before{content:"";position:absolute;right:20px;top:50%;width:14px;height:1.5px;background:var(--c-text-2);transform:translateY(-50%)}
.faq-acc .accordion-button::after{content:"";position:absolute;right:26.25px;top:50%;width:1.5px;height:14px;background:var(--c-text-2);margin:0;border:0;transform:translateY(-50%);transition:transform .22s ease,opacity .22s ease}
.faq-acc .accordion-button:not(.collapsed)::before{background:var(--c-primary)}
.faq-acc .accordion-button:not(.collapsed)::after{background:var(--c-primary);transform:translateY(-50%) scaleY(0);opacity:0}
.faq-acc .accordion-body{padding:0 48px 24px 18px;font-size:15px;line-height:1.8;color:var(--c-text-2)}
.faq-acc .accordion-body a{color:var(--c-accent)}
.faq-acc .accordion-body a:hover{text-decoration:underline}
/* ============ CTA ============ */
.cta-bar{margin-top:64px}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:32px 34px;border-radius:16px;border:1px solid rgba(108,76,241,.35);background:
  radial-gradient(420px 180px at 12% 0%,rgba(108,76,241,.24),transparent 70%),
  var(--c-surface)}
.cta-inner h2{font-size:24px;margin-bottom:8px}
.cta-inner p{font-size:14.5px;color:var(--c-text-2);max-width:60ch;margin:0}
/* ============ 相关分类 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}
.rel-card{display:flex;flex-direction:column;overflow:hidden;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.4);box-shadow:var(--sh-hover)}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2)}
.rel-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:17px}
.rel-body p{font-size:14px;color:var(--c-text-2);margin:0}
.rel-body .link-arrow{margin-top:auto}
/* ============ 页脚 ============ */
.site-footer{margin-top:0;border-top:1px solid var(--c-line);background:var(--c-bg-alt);position:relative}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;padding:64px 0 40px}
.footer-col h4.footer-title{font-size:15px;margin-bottom:16px;display:flex;align-items:center;justify-content:space-between}
.footer-brand p{font-size:14px;color:var(--c-text-2);margin:16px 0 18px;max-width:34ch}
.socials{display:flex;gap:10px}
.socials a{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;border:1px solid var(--c-line);color:var(--c-text-2);background:var(--c-surface)}
.socials a:hover{color:#fff;border-color:rgba(108,76,241,.5);background:var(--c-primary-soft)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--c-text-2)}
.footer-links a:hover{color:var(--c-accent)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--c-text-2)}
.footer-contact span{display:flex;gap:8px}
.acc-arrow{display:none;color:var(--c-text-3)}
.footer-bottom{border-top:1px solid var(--c-line-soft);padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:var(--c-text-3);flex-wrap:wrap}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-accent)}
/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}
/* ============ 断点 ============ */
@media (max-width:1399.98px){
  .mega-panel{width:760px}
}
@media (max-width:1199.98px){
  .page-banner h1{font-size:34px}
  .mega-panel{width:700px;grid-template-columns:1.1fr 1fr}
  .mega-entry{display:none}
  .sidebar-sticky{position:static}
}
@media (max-width:991.98px){
  .nav-toggle{display:grid}
  .nav-collapse{position:fixed;top:0;right:0;bottom:0;width:min(88vw,380px);flex-direction:column;align-items:stretch;justify-content:flex-start;gap:20px;padding:88px 20px 32px;background:var(--c-bg-alt);border-left:1px solid var(--c-line);overflow-y:auto;transform:translateX(100%);transition:transform .28s ease;z-index:60}
  .nav-collapse.open{transform:translateX(0)}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px}
  .nav-links a{padding:14px 12px;font-size:16px;border-radius:10px}
  .nav-links a.active::after{display:none}
  .nav-links a.active{background:var(--c-primary-soft);color:#fff}
  .nav-right{flex-direction:column;align-items:stretch;gap:12px}
  .nav-right .btn{width:100%}
  .mega-toggle{width:100%;justify-content:space-between;padding:13px 14px}
  .mega-panel{position:static;width:100%;display:none;opacity:1;visibility:visible;transform:none;grid-template-columns:1fr;gap:18px;padding:16px;box-shadow:none}
  .mega-panel.open{display:grid}
  .mega-entry{display:flex}
  .dl-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;padding:22px}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col--acc .footer-title{border-bottom:1px solid var(--c-line);padding-bottom:12px;margin-bottom:12px;cursor:pointer}
  .acc-arrow{display:block;transition:transform .22s ease}
  .footer-col--acc.open .acc-arrow{transform:rotate(180deg)}
  .footer-col--acc .footer-links,.footer-col--acc .footer-contact{display:none}
  .footer-col--acc.open .footer-links,.footer-col--acc.open .footer-contact{display:flex}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .container{padding-left:16px;padding-right:16px}
  .page-banner h1{font-size:28px}
  .banner-inner{min-height:200px;padding:36px 0}
  .page-main{padding:40px 0 64px}
  .block+.block{margin-top:48px}
  .sec-title{font-size:22px}
  .flow{grid-template-columns:1fr;gap:24px}
  .flow::before{left:7px;right:auto;top:8px;bottom:8px;width:1px;height:auto}
  .flow-step{padding-top:0;padding-left:32px}
  .flow-step .node{top:4px}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:26px 22px}
  .cta-inner .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 32px}
  .footer-bottom{justify-content:center;text-align:center}
  .faq-wrap{padding:8px 18px}
  .faq-acc .accordion-button{font-size:16.5px;padding:18px 42px 18px 14px}
  .faq-acc .accordion-body{padding:0 42px 20px 14px}
}
@media (max-width:575.98px){
  .topbar-left{font-size:12px}
  .topbar-right{display:none}
  .brand-sub{display:none}
  .page-banner h1{font-size:24px}
  .dl-card{padding:20px}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root{
  --c-bg:#0B0B14;
  --c-bg-alt:#12121E;
  --c-surface:#171727;
  --c-surface-2:#1E1E30;
  --c-primary:#6C4CF1;
  --c-primary-deep:#4A2FD0;
  --c-primary-soft:rgba(108,76,241,.12);
  --c-accent:#22D3EE;
  --c-lime:#B8FF3C;
  --c-text:#F2F3F8;
  --c-text-2:#A7A9BE;
  --c-text-3:#6E7085;
  --c-line:rgba(255,255,255,.08);
  --c-line-soft:rgba(255,255,255,.05);
  --c-ok:#34D399;
  --c-warn:#FFB020;
  --c-err:#FF5C7A;

  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;

  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --shadow-hover:0 18px 44px rgba(108,76,241,.22);

  --font-sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --container:1200px;
  --nav-h:76px;
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-text);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;}
p{margin:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(108,76,241,.45);color:#fff;}

/* ===== 容器与栅格 ===== */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){.container{max-width:1280px;}}
.section{padding:88px 0;}
.section--alt{background:var(--c-bg-alt);}
.section-head{margin-bottom:40px;max-width:760px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-text-3);margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";width:3px;height:14px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-head h2{font-size:30px;line-height:1.35;}
.section-head p{margin-top:12px;color:var(--c-text-2);font-size:15.5px;max-width:72ch;}

/* ===== 顶部信息条 ===== */
.topbar{
  background:#0E0E1A;
  border-bottom:1px solid var(--c-line-soft);
  font-size:12px;
  color:var(--c-text-3);
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;}
.topbar-left{display:flex;align-items:center;gap:8px;}
.topbar .dot{
  width:6px;height:6px;border-radius:50%;background:var(--c-lime);
  box-shadow:0 0 0 3px rgba(184,255,60,.15);display:inline-block;
}
.topbar-right{display:flex;align-items:center;gap:18px;}
.topbar-right a{color:var(--c-text-3);font-size:12px;}
.topbar-right a:hover{color:var(--c-accent);}

/* ===== 主导航 ===== */
.site-header{position:sticky;top:0;z-index:1030;}
.mainnav{
  background:rgba(11,11,20,.94);
  border-bottom:1px solid var(--c-line);
  transition:background .2s ease,box-shadow .2s ease;
}
.site-header.is-stuck .mainnav{background:rgba(11,11,20,.98);box-shadow:0 10px 30px rgba(0,0,0,.45);}
.site-header.is-stuck .nav-inner{height:64px;}
.nav-inner{display:flex;align-items:center;gap:20px;height:var(--nav-h);transition:height .2s ease;}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#fff;box-shadow:0 8px 20px rgba(108,76,241,.35);flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.22;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--c-text);}
.brand-sub{font-size:11px;color:var(--c-text-3);letter-spacing:.06em;}
.brand:hover .brand-name{color:#fff;}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-links > li > a{
  position:relative;display:block;padding:10px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--c-text-2);white-space:nowrap;
}
.nav-links > li > a:hover{color:var(--c-text);background:rgba(255,255,255,.06);}
.nav-links > li > a.active{color:var(--c-text);}
.nav-links > li > a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;position:relative;}

.mega-toggle{
  display:inline-flex;align-items:center;gap:7px;
  background:transparent;border:1px solid var(--c-line);
  border-radius:var(--r-btn);padding:9px 14px;font-size:14px;font-weight:500;
  color:var(--c-text-2);cursor:pointer;transition:all .18s ease;
}
.mega-toggle svg{transition:transform .2s ease;}
.mega-toggle:hover{color:var(--c-text);border-color:rgba(108,76,241,.5);background:rgba(255,255,255,.04);}
.mega-toggle[aria-expanded="true"]{color:#C9BCFF;border-color:rgba(108,76,241,.6);background:var(--c-primary-soft);}
.mega-toggle[aria-expanded="true"] svg{transform:rotate(180deg);}

.nav-toggle{
  display:none;background:transparent;border:1px solid var(--c-line);border-radius:9px;
  width:40px;height:40px;place-items:center;color:var(--c-text-2);cursor:pointer;margin-left:auto;
}
.nav-toggle:hover{color:var(--c-text);border-color:rgba(108,76,241,.5);}

/* ===== Mega Menu ===== */
.mega-panel{
  position:absolute;top:calc(100% + 16px);right:0;width:840px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.6);
  padding:24px;display:none;z-index:1040;
}
.mega-panel.is-open{display:block;}
.mega-grid{display:grid;grid-template-columns:1.25fr 1fr 0.95fr;gap:24px;}
.mega-col-title{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-text-3);margin-bottom:14px;
}
.mega-cats{display:grid;grid-template-columns:1fr;gap:4px;}
.mega-cats a{
  display:flex;gap:10px;align-items:flex-start;padding:9px 10px;border-radius:10px;
  transition:background .18s ease,color .18s ease;
}
.mega-cats a:hover{background:rgba(255,255,255,.06);color:var(--c-text);}
.mega-cats .ic{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex:0 0 auto;
  background:var(--c-primary-soft);color:#C9BCFF;
}
.mega-item-text{display:flex;flex-direction:column;line-height:1.4;}
.mega-item-text strong{font-size:14px;font-weight:600;color:var(--c-text);}
.mega-item-text em{font-style:normal;font-size:12px;color:var(--c-text-3);}
.mega-cats a:hover .mega-item-text strong{color:#C9BCFF;}

.mega-list{display:flex;flex-direction:column;gap:2px;}
.mega-list a{display:block;padding:10px;border-radius:10px;transition:background .18s ease;}
.mega-list a:hover{background:rgba(255,255,255,.06);}
.mega-list span{display:block;font-size:13.5px;color:var(--c-text-2);line-height:1.5;}
.mega-list a:hover span{color:var(--c-text);}
.mega-list em{font-style:normal;font-size:12px;color:var(--c-text-3);}

.mega-card{
  display:block;border:1px solid var(--c-line);border-radius:14px;overflow:hidden;
  background:var(--c-surface-2);transition:border-color .18s ease,transform .18s ease;
}
.mega-card:hover{border-color:rgba(108,76,241,.45);transform:translateY(-2px);}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
.mega-card-body{display:block;padding:14px;}
.mega-card-body strong{display:block;font-size:14.5px;color:var(--c-text);}
.mega-card-body em{display:block;font-style:normal;font-size:12.5px;color:var(--c-text-3);margin-top:4px;}
.mega-card-body .arrow{display:inline-block;margin-top:10px;font-size:12.5px;color:#C9BCFF;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);padding:12px 24px;font-size:15px;font-weight:600;
  border:1px solid transparent;line-height:1.2;cursor:pointer;
  transition:transform .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));color:#fff;box-shadow:0 10px 26px rgba(108,76,241,.3);}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 32px rgba(108,76,241,.38);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:rgba(108,76,241,.4);color:#C9BCFF;}
.btn-ghost:hover{background:var(--c-primary-soft);color:#fff;border-color:var(--c-primary);}
.btn-outline{background:transparent;border-color:var(--c-line);color:var(--c-text-2);}
.btn-outline:hover{border-color:rgba(108,76,241,.5);color:var(--c-text);background:rgba(255,255,255,.04);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn:disabled,.btn.disabled{opacity:.4;cursor:not-allowed;transform:none;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#C9BCFF;}
.link-arrow svg{transition:transform .18s ease;}
.link-arrow:hover svg{transform:translateX(4px);}

/* ===== 徽章 / 标签 ===== */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;background:var(--c-primary-soft);
  border:1px solid rgba(108,76,241,.32);color:#C9BCFF;
}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;}
.tag-list a,.tag-list span{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-text-2);font-size:13px;
  transition:all .18s ease;
}
.tag-list a:hover{border-color:rgba(108,76,241,.5);color:#C9BCFF;background:var(--c-primary-soft);}

/* ===== 文章头部 ===== */
.article-hero{padding:36px 0 0;position:relative;overflow:hidden;}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 70% 0%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 70% 0%,#000 0%,transparent 72%);
}
.article-hero .container{position:relative;z-index:1;}

.breadcrumb-nav{font-size:13px;color:var(--c-text-3);margin-bottom:22px;}
.breadcrumb-nav ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.breadcrumb-nav li{display:flex;align-items:center;gap:10px;min-width:0;}
.breadcrumb-nav li + li::before{
  content:"";width:4px;height:4px;border-radius:50%;background:var(--c-primary);flex:0 0 auto;
}
.breadcrumb-nav a{color:var(--c-text-2);}
.breadcrumb-nav a:hover{color:var(--c-accent);}
.breadcrumb-nav .current{
  color:var(--c-text-3);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

.article-head{max-width:900px;}
.article-title{
  font-size:clamp(26px,3.3vw,40px);
  line-height:1.25;font-weight:800;margin-top:18px;
  overflow-wrap:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:6px 20px;margin-top:18px;
  font-size:13px;color:var(--c-text-3);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta svg{opacity:.7;}

.article-cover{
  margin-top:28px;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line);background:var(--c-surface-2);
  aspect-ratio:21/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover;}

/* ===== 文章布局 ===== */
.article-wrap{padding:56px 0 0;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;}
.article-main{min-width:0;max-width:820px;margin:0 auto;width:100%;}

.article-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:36px 34px;box-shadow:var(--shadow-card);
}

/* ===== 正文排版 ===== */
.article-body{font-size:16px;line-height:1.9;color:#DCDEE9;overflow-wrap:break-word;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;color:var(--c-text);
  margin:2em 0 .85em;padding-left:14px;font-weight:700;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.22em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.article-body h3{font-size:19px;line-height:1.5;color:var(--c-text);margin:1.6em 0 .7em;}
.article-body h4{font-size:17px;color:var(--c-text);margin:1.4em 0 .6em;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:2px;}
.article-body ul li{position:relative;padding-left:18px;margin:.4em 0;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--c-primary);
}
.article-body ol{counter-reset:olc;padding-left:0;}
.article-body ol li{position:relative;padding-left:26px;margin:.4em 0;counter-increment:olc;}
.article-body ol li::before{
  content:counter(olc);position:absolute;left:0;top:.34em;width:18px;height:18px;border-radius:6px;
  background:var(--c-primary-soft);color:#C9BCFF;font-size:11px;font-weight:700;
  display:grid;place-items:center;
}
.article-body blockquote{
  margin:1.5em 0;padding:16px 22px;border-left:3px solid var(--c-accent);
  background:rgba(255,255,255,.05);border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--c-text-2);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-img);margin:1.5em auto;background:var(--c-surface-2);}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-img);overflow:hidden;
}
.article-body thead th{
  background:rgba(108,76,241,.12);color:var(--c-text);font-weight:600;
  text-align:left;padding:12px 14px;border-bottom:1px solid var(--c-line);
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--c-line-soft);color:var(--c-text-2);}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.04);}
.article-body tbody tr:hover{background:rgba(255,255,255,.06);}
.article-body pre{
  background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-img);
  padding:16px 18px;overflow:auto;margin:1.5em 0;
  font-family:var(--font-mono);font-size:13.5px;line-height:1.7;color:#CFD3E4;
}
.article-body code{
  font-family:var(--font-mono);font-size:13.5px;background:var(--c-surface-2);
  padding:2px 6px;border-radius:6px;color:#C9BCFF;
}
.article-body pre code{background:none;padding:0;color:inherit;}
.article-body a{color:#9E8BFF;border-bottom:1px solid rgba(158,139,255,.35);}
.article-body a:hover{color:var(--c-accent);border-bottom-color:var(--c-accent);}
.article-body strong{color:#fff;font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0;}

.article-empty{text-align:center;padding:40px 10px;}
.article-empty .empty-ic{
  width:64px;height:64px;border-radius:18px;margin:0 auto 18px;display:grid;place-items:center;
  background:var(--c-surface-2);color:var(--c-text-3);border:1px solid var(--c-line);
}
.article-empty h2{font-size:22px;color:var(--c-text);margin-bottom:10px;}
.article-empty p{color:var(--c-text-2);font-size:15px;margin-bottom:22px;}

/* ===== 文末操作 ===== */
.article-foot{margin-top:34px;padding-top:26px;border-top:1px solid var(--c-line);}
.article-foot .foot-row{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center;}
.share-group{display:flex;gap:10px;}
.share-group button{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:var(--c-surface-2);border:1px solid var(--c-line);color:var(--c-text-2);cursor:pointer;
  transition:all .18s ease;
}
.share-group button:hover{border-color:var(--c-primary);color:#C9BCFF;background:var(--c-primary-soft);}

/* ===== 侧栏 ===== */
.article-side{display:none;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px;margin-bottom:20px;
}
.side-card h3{font-size:15px;color:var(--c-text);margin-bottom:14px;letter-spacing:.02em;}
.side-card--sticky{position:sticky;top:calc(var(--nav-h) + 24px);}
.toc-list{max-height:52vh;overflow:auto;}
.toc-list a{
  display:block;padding:7px 0 7px 12px;border-left:2px solid var(--c-line);
  font-size:13.5px;line-height:1.5;color:var(--c-text-2);
  border-radius:0 6px 6px 0;transition:all .16s ease;
}
.toc-list a:hover{color:var(--c-text);border-left-color:rgba(108,76,241,.6);background:rgba(255,255,255,.04);}
.toc-list a.lv3{padding-left:26px;font-size:12.5px;color:var(--c-text-3);}
.toc-list a.is-active{color:#C9BCFF;border-left-color:var(--c-primary);background:var(--c-primary-soft);}
.side-cats{display:flex;flex-direction:column;gap:8px;}
.side-cats a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:11px;background:var(--c-surface-2);
  border:1px solid var(--c-line);font-size:13.5px;color:var(--c-text-2);
  transition:all .18s ease;
}
.side-cats a:hover{border-color:rgba(108,76,241,.5);color:#fff;background:var(--c-primary-soft);}
.side-cats a span{color:var(--c-text-3);font-size:12px;}

/* ===== 卡片 ===== */
.card-post{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.card-post:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.35);box-shadow:var(--shadow-hover);}
.card-post .card-media{aspect-ratio:16/9;background:var(--c-surface-2);overflow:hidden;}
.card-post .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card-post:hover .card-media img{transform:scale(1.04);}
.card-post .card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-post h3{font-size:17px;line-height:1.5;color:var(--c-text);}
.card-post:hover h3{color:#C9BCFF;}
.card-post p{font-size:14px;color:var(--c-text-2);line-height:1.7;}
.card-post .card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--c-text-3);padding-top:12px;border-top:1px solid var(--c-line-soft);
}

/* ===== 上一篇 / 下一篇 ===== */
.pn-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:24px;}
.pn-card{
  display:flex;align-items:center;gap:14px;padding:18px 20px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  transition:all .18s ease;
}
.pn-card:hover{border-color:rgba(108,76,241,.4);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.pn-card .pn-ic{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto;
  background:var(--c-primary-soft);color:#C9BCFF;
}
.pn-card small{display:block;font-size:12px;color:var(--c-text-3);letter-spacing:.08em;}
.pn-card strong{display:block;font-size:15px;color:var(--c-text);margin-top:2px;font-weight:600;}
.pn-card.next{justify-content:flex-end;text-align:right;}

/* ===== FAQ ===== */
.faq-list{max-width:860px;margin:0 auto;}
.accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--c-line);
}
.accordion-button{
  background:transparent;color:var(--c-text);font-size:18px;font-weight:600;
  padding:22px 44px 22px 0;border-radius:0;box-shadow:none;position:relative;
  transition:color .18s ease;
}
.accordion-button:not(.collapsed){color:#C9BCFF;background:transparent;box-shadow:none;}
.accordion-button:not(.collapsed)::after{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.accordion-button::after{
  content:"";position:absolute;right:6px;top:50%;width:14px;height:14px;
  transform:translateY(-50%);
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A7A9BE' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-size:contain;transition:transform .18s ease;
}
.accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236C4CF1' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
  transform:translateY(-50%) rotate(180deg);
}
.accordion-button:focus{box-shadow:none;}
.accordion-body{
  padding:0 46px 24px 0;color:var(--c-text-2);font-size:15px;line-height:1.8;
}

/* ===== 转化表单 ===== */
.consult-section{
  background:var(--c-bg-alt);position:relative;overflow:hidden;
}
.consult-section::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:56px 56px;
}
.consult-section .container{position:relative;z-index:1;}
.consult-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.consult-form-wrap h2{font-size:28px;line-height:1.35;}
.consult-form-wrap > p{margin-top:12px;color:var(--c-text-2);font-size:15px;}
.consult-form{margin-top:26px;display:flex;flex-direction:column;gap:16px;}
.form-row{display:grid;grid-template-columns:1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;color:var(--c-text-2);letter-spacing:.02em;}
.field input,.field select,.field textarea{
  width:100%;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-input);padding:12px 14px;font-size:14.5px;color:var(--c-text);
  transition:border-color .18s ease,box-shadow .18s ease;outline:none;
}
.field input::placeholder,.field textarea::placeholder{color:var(--c-text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(108,76,241,.14);
}
.field select{appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A7A9BE' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:14px;padding-right:40px;
}
.form-tip{font-size:12.5px;color:var(--c-text-3);margin-top:2px;}
.form-msg{font-size:13px;color:var(--c-ok);min-height:20px;}

.info-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-card);
}
.info-card h3{font-size:17px;margin-bottom:18px;}
.info-item{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--c-line-soft);}
.info-item:last-of-type{border-bottom:0;}
.info-item .ic{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto;
  background:var(--c-primary-soft);color:#C9BCFF;
}
.info-item strong{display:block;font-size:14.5px;color:var(--c-text);}
.info-item span{display:block;font-size:13px;color:var(--c-text-3);margin-top:3px;}
.info-note{
  margin-top:18px;padding:14px 16px;border-radius:12px;
  background:var(--c-surface-2);border:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-2);line-height:1.7;
}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:88px;background:var(--c-bg-alt);position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--c-text-2);line-height:1.8;max-width:36ch;}
.socials{display:flex;gap:10px;margin-top:20px;}
.socials a{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-text-2);
  transition:all .18s ease;
}
.socials a:hover{border-color:var(--c-primary);color:#C9BCFF;background:var(--c-primary-soft);}
.footer-title{
  font-size:14px;color:var(--c-text);margin-bottom:16px;display:flex;
  align-items:center;justify-content:space-between;gap:10px;
}
.acc-arrow{display:none;color:var(--c-text-3);transition:transform .18s ease;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--c-text-2);}
.footer-links a:hover{color:var(--c-accent);}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--c-text-2);}
.footer-contact li{display:flex;gap:9px;align-items:flex-start;line-height:1.6;}
.footer-contact svg{flex:0 0 auto;margin-top:4px;color:var(--c-text-3);}
.footer-bottom{border-top:1px solid var(--c-line);}
.footer-bottom-inner{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:22px 0;font-size:12.5px;color:var(--c-text-3);
}
.footer-bottom-inner a{color:var(--c-text-3);}
.footer-bottom-inner a:hover{color:var(--c-accent);}

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

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .article-side{display:none !important;}
  .article-main{max-width:820px;}
}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 310px;}
  .article-main{margin:0;}
  .article-side{display:block;}
}
@media (min-width:992px){
  .consult-grid{grid-template-columns:1.4fr 1fr;gap:48px;}
  .form-row{grid-template-columns:1fr 1fr;}
  .pn-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991px){
  .nav-toggle{display:grid;}
  .nav-collapse{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:1050;
    background:var(--c-bg);padding:88px 20px 32px;overflow-y:auto;
    transform:translateX(100%);transition:transform .24s ease;display:block;
  }
  .nav-collapse.is-open{transform:translateX(0);}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px;margin-left:0;}
  .nav-links > li > a{padding:14px 12px;font-size:16px;border-radius:10px;}
  .nav-links > li > a.active::after{left:12px;right:auto;width:28px;bottom:8px;}
  .nav-right{margin:20px 0 0;flex-direction:column;align-items:stretch;gap:12px;}
  .mega-toggle{justify-content:space-between;width:100%;padding:13px 16px;}
  .mega-panel{
    position:static;width:100%;margin-top:12px;box-shadow:none;
    padding:16px;border-radius:14px;
  }
  .mega-grid{grid-template-columns:1fr;gap:20px;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding:44px 0 24px;}
  .footer-col{border-bottom:1px solid var(--c-line);padding:16px 0;}
  .footer-col:last-child{border-bottom:0;}
  .acc-arrow{display:block;}
  .footer-col.is-open .acc-arrow{transform:rotate(180deg);}
  .footer-links,.footer-contact{display:none;}
  .footer-col.is-open .footer-links,.footer-col.is-open .footer-contact{display:flex;}
  .footer-brand p,.footer-brand .socials{display:block;}
  .footer-brand{border-bottom:1px solid var(--c-line);padding-bottom:20px;}
  .footer-bottom-inner{justify-content:center;text-align:center;}
}
@media (max-width:767px){
  .section{padding:64px 0;}
  .article-card{padding:24px 20px;}
  .article-cover{aspect-ratio:16/9;}
  .breadcrumb-nav .current{max-width:180px;}
  .accordion-button{font-size:16.5px;padding:18px 38px 18px 0;}
  .accordion-body{padding:0 30px 20px 0;font-size:14.5px;}
  .consult-form-wrap h2{font-size:24px;}
  .site-footer{margin-top:64px;}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px;}
  .topbar .container{padding-left:16px;padding-right:16px;}
  .topbar-right{display:none;}
  .brand-sub{display:none;}
  .brand-name{font-size:16px;}
  .article-hero{padding-top:24px;}
  .article-meta{gap:6px 14px;}
  .article-body h2{font-size:21px;}
  .article-body h3{font-size:17.5px;}
  .btn-block-sm{width:100%;}
  .share-group{margin-top:6px;}
  .footer-bottom-inner{font-size:12px;}
}

/* roulang page: category2 */
:root{
  --c-bg:#0B0B14;--c-bg-alt:#12121E;--c-surface:#171727;--c-surface-2:#1E1E30;
  --c-primary:#6C4CF1;--c-primary-deep:#4A2FD0;--c-primary-soft:rgba(108,76,241,.12);
  --c-accent:#22D3EE;--c-lime:#B8FF3C;
  --c-text:#F2F3F8;--c-text-2:#A7A9BE;--c-text-3:#6E7085;
  --c-line:rgba(255,255,255,.08);--c-line-soft:rgba(255,255,255,.05);
  --c-ok:#34D399;--c-warn:#FFB020;--c-err:#FF5C7A;
  --r-card:14px;--r-btn:10px;--r-input:10px;--r-img:12px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-hover:0 18px 44px rgba(108,76,241,.22);
  --ease:180ms ease;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;overflow-x:hidden;
}
img{max-width:100%;display:block;background:var(--c-surface-2)}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease)}
a:hover{color:#8f78ff}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.01em}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;padding-inline:24px}
@media(min-width:1400px){.container{max-width:1280px}}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:var(--c-bg);border-bottom:1px solid var(--c-line-soft);transition:box-shadow var(--ease)}
.site-header.scrolled{box-shadow:0 8px 28px rgba(0,0,0,.5)}
.topbar{background:var(--c-bg-alt);border-bottom:1px solid var(--c-line-soft);font-size:12px;color:var(--c-text-3)}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar-left{display:flex;align-items:center;gap:8px}
.topbar .dot{width:6px;height:6px;border-radius:50%;background:var(--c-lime);display:inline-block;box-shadow:0 0 8px rgba(184,255,60,.7)}
.topbar-right{display:flex;gap:18px}
.topbar-right a{color:var(--c-text-2)}
.topbar-right a:hover{color:var(--c-primary)}
.mainnav{position:relative}
.nav-inner{display:flex;align-items:center;gap:28px;height:76px;transition:height var(--ease)}
.site-header.scrolled .nav-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-text);flex:0 0 auto}
.brand:hover{color:var(--c-text)}
.brand-mark{width:36px;height:36px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  color:#fff;background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));box-shadow:0 6px 18px rgba(108,76,241,.35)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--c-text-3);letter-spacing:.08em}
.nav-toggle{display:none;margin-left:auto;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-text);align-items:center;justify-content:center}
.nav-collapse{display:flex;align-items:center;justify-content:space-between;flex:1;gap:24px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--c-text-2)}
.nav-links a:hover{color:var(--c-text)}
.nav-links a.active{color:var(--c-text)}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:-2px;width:60%;height:2px;border-radius:2px;background:var(--c-primary)}
.nav-right{position:relative;display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn{--bs-btn-border-radius:var(--r-btn);font-weight:600;font-size:14px;padding:10px 20px;border-width:1px;transition:transform var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease)}
.btn-sm{padding:8px 16px;font-size:13px}
.btn-primary{--bs-btn-color:#fff;--bs-btn-bg:var(--c-primary);--bs-btn-border-color:var(--c-primary);
  --bs-btn-hover-color:#fff;--bs-btn-hover-bg:var(--c-primary-deep);--bs-btn-hover-border-color:var(--c-primary-deep);
  --bs-btn-active-color:#fff;--bs-btn-active-bg:var(--c-primary-deep);--bs-btn-active-border-color:var(--c-primary-deep);
  --bs-btn-disabled-bg:var(--c-primary);--bs-btn-disabled-border-color:var(--c-primary);--bs-btn-disabled-opacity:.4}
.btn-primary:hover{transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1px solid rgba(108,76,241,.4);color:#c3b6ff}
.btn-ghost:hover{background:var(--c-primary-soft);color:#ddd5ff;border-color:rgba(108,76,241,.7)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-accent)}
.link-arrow svg{transition:transform var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
.mega-toggle{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--c-line);
  color:var(--c-text-2);font-size:14px;font-weight:500;padding:8px 14px;border-radius:var(--r-btn);transition:var(--ease)}
.mega-toggle:hover{border-color:rgba(108,76,241,.6);color:var(--c-text)}
.mega-toggle svg{transition:transform var(--ease)}
.mega-toggle[aria-expanded="true"]{color:var(--c-primary);border-color:rgba(108,76,241,.6)}
.mega-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.mega-panel{position:absolute;top:calc(100% + 16px);right:0;width:820px;max-width:calc(100vw - 48px);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:0 24px 60px rgba(0,0,0,.6);
  padding:24px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity var(--ease),transform var(--ease),visibility var(--ease);z-index:1050}
.mega-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col-title{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--c-text-3);margin-bottom:12px}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.mega-cats a{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:9px;font-size:13.5px;color:var(--c-text-2);transition:var(--ease)}
.mega-cats a:hover{background:rgba(255,255,255,.06);color:var(--c-primary)}
.mega-cats .ic{width:26px;height:26px;border-radius:8px;background:var(--c-surface-2);display:inline-flex;align-items:center;justify-content:center;color:var(--c-accent);flex:0 0 auto}
.mega-list li{padding:8px 0;border-bottom:1px dashed var(--c-line-soft)}
.mega-list li:last-child{border-bottom:0}
.mega-list a{display:block;font-size:13.5px;color:var(--c-text-2)}
.mega-list a:hover{color:var(--c-primary)}
.mega-list .date{font-size:11.5px;color:var(--c-text-3)}
.mega-entry{display:block;border:1px solid var(--c-line);border-radius:12px;overflow:hidden;background:var(--c-surface-2)}
.mega-entry img{aspect-ratio:16/9;object-fit:cover;width:100%}
.mega-entry span{display:block;padding:10px 12px;font-size:12.5px;color:var(--c-text-2)}
.mega-entry:hover{border-color:rgba(108,76,241,.5)}

/* ---------- banner ---------- */
.page-banner{position:relative;padding:64px 0 56px;background:
  linear-gradient(180deg,rgba(11,11,20,.72),rgba(11,11,20,.96)),
  url("/assets/images/backpic/back-2.png") center/cover no-repeat, var(--c-surface-2);
  border-bottom:1px solid var(--c-line-soft);overflow:hidden}
.page-banner::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;pointer-events:none;mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 78%)}
.banner-inner{position:relative;z-index:1;text-align:center;max-width:820px;margin:0 auto}
.banner-tag{display:inline-block;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-accent);
  border:1px solid rgba(34,211,238,.35);border-radius:999px;padding:5px 14px;margin-bottom:18px}
.page-banner h1{font-size:40px;font-weight:800;margin-bottom:14px}
.page-banner .banner-sub{font-size:16px;color:var(--c-text-2);margin:0}
.banner-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px;text-align:left}
.metric-mini{background:rgba(23,23,39,.86);border:1px solid var(--c-line);border-radius:var(--r-card);padding:18px 20px;box-shadow:var(--sh-card)}
.metric-mini .mn{font-size:30px;font-weight:800;color:var(--c-lime);line-height:1.1}
.metric-mini .mn small{font-size:13px;color:var(--c-text-2);font-weight:600;margin-left:4px}
.metric-mini .ml{font-size:12.5px;color:var(--c-text-3);margin-top:6px}

/* ---------- crumbs ---------- */
.crumb-bar{background:var(--c-bg-alt);border-bottom:1px solid var(--c-line-soft)}
.crumb-bar .container{padding-block:12px}
.crumbs{font-size:13px;color:var(--c-text-3)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"";width:3px;height:3px;border-radius:50%;background:var(--c-primary);display:inline-block}
.crumbs a{color:var(--c-text-3)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .current{color:var(--c-text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:240px}

/* ---------- section ---------- */
.section{padding:88px 0}
.section--alt{background:var(--c-bg-alt);border-top:1px solid var(--c-line-soft);border-bottom:1px solid var(--c-line-soft)}
.section-head{max-width:760px;margin-bottom:40px}
.sec-eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.sec-num{font-size:12px;letter-spacing:.16em;color:var(--c-primary);font-weight:700}
.sec-rule{width:3px;height:16px;background:var(--c-primary);border-radius:2px}
.sec-title{font-size:30px;font-weight:800}
.sec-desc{color:var(--c-text-2);margin-top:12px;max-width:72ch}

/* ---------- spec rows ---------- */
.spec-rows{border-top:1px solid var(--c-line)}
.spec-row{display:grid;grid-template-columns:180px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--c-line);transition:background-color var(--ease)}
.spec-row:hover{background:rgba(255,255,255,.025)}
.spec-key{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--c-text-3);font-weight:600;padding-top:4px}
.spec-row:hover .spec-key{color:var(--c-primary)}
.spec-val h3{font-size:18px;margin-bottom:8px}
.spec-val p{margin:0;color:var(--c-text-2);font-size:15px}

/* ---------- feature split ---------- */
.feature-split{display:grid;grid-template-columns:2fr 1fr;gap:28px;align-items:stretch}
.feature-media{border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.feature-media img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover}
.feature-points{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;display:flex;flex-direction:column;justify-content:center;gap:18px}
.point{display:flex;gap:12px;align-items:flex-start}
.point .tick{width:22px;height:22px;flex:0 0 auto;border-radius:6px;background:rgba(184,255,60,.12);color:var(--c-lime);display:inline-flex;align-items:center;justify-content:center;margin-top:2px}
.point b{display:block;font-size:15px;font-weight:700}
.point span{font-size:13.5px;color:var(--c-text-2)}

/* ---------- table ---------- */
.table-wrap{border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:var(--c-surface)}
.spec-table{margin:0;--bs-table-bg:transparent;--bs-table-color:var(--c-text);--bs-table-border-color:var(--c-line);color:var(--c-text)}
.spec-table thead th{background:var(--c-primary-soft);color:#cfc6ff;font-size:12.5px;letter-spacing:.08em;font-weight:700;
  border-bottom:1px solid var(--c-line);padding:14px 18px;white-space:nowrap}
.spec-table tbody td{padding:15px 18px;border-color:var(--c-line-soft);font-size:14.5px;color:var(--c-text-2);vertical-align:middle}
.spec-table tbody tr:hover td{background:rgba(255,255,255,.04);color:var(--c-text)}
.spec-table tbody td:first-child{color:var(--c-text);font-weight:600}
.spec-table .pill{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;background:var(--c-surface-2);border:1px solid var(--c-line);color:var(--c-text-2)}

/* ---------- log list ---------- */
.log-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.log-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px;position:relative;transition:var(--ease)}
.log-item::before{content:"";position:absolute;left:20px;top:0;width:34px;height:2px;background:var(--c-primary);border-radius:0 0 2px 2px}
.log-item:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.45);box-shadow:var(--sh-hover)}
.log-date{font-size:12px;letter-spacing:.1em;color:var(--c-accent);font-weight:600}
.log-item h3{font-size:16px;margin:10px 0 8px}
.log-item p{font-size:14px;color:var(--c-text-2);margin:0}

/* ---------- sidebar ---------- */
.side-stack{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-card)}
.side-title{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--c-text-3);margin-bottom:14px}
.side-nav li+li{margin-top:6px}
.side-nav a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:9px;
  font-size:14px;color:var(--c-text-2);border:1px solid transparent;transition:var(--ease)}
.side-nav a:hover{background:var(--c-primary-soft);color:var(--c-text);border-color:rgba(108,76,241,.35)}
.side-nav a.is-current{background:var(--c-primary-soft);border-color:rgba(108,76,241,.5);color:var(--c-text);font-weight:600}
.side-nav a svg{flex:0 0 auto;opacity:.6}
.side-consult{background:linear-gradient(160deg,rgba(108,76,241,.18),rgba(23,23,39,.9));border-color:rgba(108,76,241,.35)}
.side-consult h3{font-size:19px;margin-bottom:8px}
.side-consult p{font-size:14px;color:var(--c-text-2);margin-bottom:16px}
.side-meta{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:var(--c-text-2);margin-top:16px;padding-top:16px;border-top:1px solid var(--c-line-soft)}
.side-meta span{display:flex;align-items:center;gap:8px}
.side-meta svg{color:var(--c-accent);flex:0 0 auto}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;--bs-accordion-border-radius:0;
  --bs-accordion-inner-border-radius:0;--bs-accordion-btn-padding-x:0;--bs-accordion-btn-padding-y:20px;
  --bs-accordion-btn-color:var(--c-text);--bs-accordion-btn-bg:transparent;
  --bs-accordion-active-color:var(--c-primary);--bs-accordion-active-bg:transparent;
  --bs-accordion-body-padding-x:0;--bs-accordion-body-padding-y:0;
  --bs-accordion-btn-focus-box-shadow:none;--bs-accordion-transition:none}
.accordion-item{border:0;border-bottom:1px solid var(--c-line);background:transparent}
.accordion-button{font-size:18px;font-weight:600;align-items:flex-start;gap:16px;position:relative}
.accordion-button::after{display:none}
.accordion-button .pm{margin-left:auto;flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform var(--ease);color:var(--c-text-3)}
.accordion-button .pm::before,.accordion-button .pm::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.accordion-button .pm::before{left:4px;right:4px;top:10px;height:2px}
.accordion-button .pm::after{top:4px;bottom:4px;left:10px;width:2px}
.accordion-button:not(.collapsed) .pm{transform:rotate(180deg);color:var(--c-primary)}
.accordion-button:not(.collapsed) .pm::after{opacity:0}
.accordion-button::before{content:"";position:absolute;left:-16px;top:20px;bottom:20px;width:3px;border-radius:2px;background:transparent;transition:var(--ease)}
.accordion-button:not(.collapsed)::before{background:var(--c-primary)}
.accordion-body{padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--c-text-2);max-width:72ch}

/* ---------- form ---------- */
.consult-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;align-items:start}
.form-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-card)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:8px;font-weight:600}
.form-control,.form-select{background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:var(--r-input);
  color:var(--c-text);font-size:14.5px;padding:11px 14px;transition:var(--ease)}
.form-control::placeholder{color:var(--c-text-3)}
.form-control:focus,.form-select:focus{background:var(--c-surface-2);border-color:var(--c-primary);color:var(--c-text);
  box-shadow:0 0 0 4px rgba(108,76,241,.14);outline:none}
.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23A7A9BE' stroke-width='2.2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E")}
.form-select option{background:var(--c-surface);color:var(--c-text)}
.form-note{font-size:12.5px;color:var(--c-text-3);margin:12px 0 0}
.info-card{background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px}
.info-card h3{font-size:19px;margin-bottom:16px}
.info-list{display:flex;flex-direction:column;gap:16px}
.info-list li{display:flex;gap:12px;font-size:14px;color:var(--c-text-2)}
.info-list svg{color:var(--c-accent);flex:0 0 auto;margin-top:3px}
.info-list b{color:var(--c-text);display:block;font-size:14.5px}

/* ---------- cta bar ---------- */
.cta-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:linear-gradient(120deg,rgba(108,76,241,.22),rgba(34,211,238,.12));
  border:1px solid rgba(108,76,241,.35);border-radius:var(--r-card);padding:30px 34px}
.cta-bar h2{font-size:24px;margin-bottom:6px}
.cta-bar p{margin:0;color:var(--c-text-2);font-size:14.5px}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cross-card{display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;color:var(--c-text);transition:var(--ease)}
.cross-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.45);box-shadow:var(--sh-hover);color:var(--c-text)}
.cross-card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.cross-body{padding:18px 20px 22px}
.cross-body h3{font-size:17px;margin-bottom:8px}
.cross-body p{font-size:13.5px;color:var(--c-text-2);margin:0 0 12px}

/* ---------- footer ---------- */
.site-footer{position:relative;background:var(--c-bg-alt);padding:64px 0 0;margin-top:0}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand p{font-size:13.5px;color:var(--c-text-2);margin:16px 0 18px;max-width:34ch}
.socials{display:flex;gap:10px}
.socials a{width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);color:var(--c-text-2);
  display:inline-flex;align-items:center;justify-content:center;transition:var(--ease)}
.socials a:hover{border-color:rgba(108,76,241,.6);color:var(--c-primary);transform:translateY(-2px)}
.footer-title{font-size:14px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;justify-content:space-between}
.acc-arrow{display:none}
.footer-links li+li{margin-top:10px}
.footer-links a{font-size:13.5px;color:var(--c-text-2)}
.footer-links a:hover{color:var(--c-primary)}
.footer-contact li{font-size:13.5px;color:var(--c-text-2);display:flex;gap:9px;margin-bottom:11px}
.footer-contact svg{color:var(--c-primary);flex:0 0 auto;margin-top:3px}
.footer-bottom{border-top:1px solid var(--c-line-soft);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--c-text-3)}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-primary)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- breakpoints ---------- */
@media(max-width:1199.98px){
  .mega-panel{width:720px}
}
@media(max-width:991.98px){
  .topbar{display:none}
  .nav-toggle{display:inline-flex}
  .nav-collapse{position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:6px;
    background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
    padding:14px 24px 24px;max-height:calc(100vh - 76px);overflow-y:auto;box-shadow:0 24px 50px rgba(0,0,0,.6)}
  .nav-collapse.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:0}
  .nav-links li{border-bottom:1px solid var(--c-line-soft)}
  .nav-links a{display:block;padding:14px 0;font-size:16px}
  .nav-links a.active::after{display:none}
  .nav-right{flex-direction:column;align-items:stretch;gap:10px;margin-top:14px}
  .nav-right .btn{width:100%;text-align:center}
  .mega-toggle{width:100%;justify-content:space-between}
  .mega-panel{position:static;width:auto;max-width:none;grid-template-columns:1fr;display:none;opacity:1;visibility:visible;
    transform:none;box-shadow:none;padding:16px;margin-top:6px}
  .mega-panel.open{display:grid}
  .page-banner h1{font-size:32px}
  .section{padding:64px 0}
  .feature-split{grid-template-columns:1fr}
  .log-list{grid-template-columns:repeat(2,1fr)}
  .cross-grid{grid-template-columns:repeat(2,1fr)}
  .consult-grid{grid-template-columns:1fr}
  .side-stack{position:static}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media(max-width:767.98px){
  .container{padding-inline:16px}
  .page-banner{padding:48px 0 44px}
  .page-banner h1{font-size:27px}
  .banner-metrics{grid-template-columns:1fr;gap:12px}
  .section{padding:48px 0}
  .sec-title{font-size:24px}
  .spec-row{grid-template-columns:1fr;gap:8px;padding:20px 0}
  .spec-key{padding-top:0}
  .log-list{grid-template-columns:1fr}
  .cross-grid{grid-template-columns:1fr}
  .cta-bar{padding:24px;flex-direction:column;align-items:flex-start}
  .cta-bar .btn{width:100%}
  .accordion-button{font-size:16px}
  .table-wrap{background:transparent;border:0;border-radius:0}
  .spec-table thead{display:none}
  .spec-table,.spec-table tbody,.spec-table tr,.spec-table td{display:block;width:100%}
  .spec-table tr{background:var(--c-surface);border:1px solid var(--c-line);border-radius:12px;padding:14px;margin-bottom:12px}
  .spec-table tbody td{border:0;padding:7px 0;display:flex;justify-content:space-between;gap:14px}
  .spec-table tbody td::before{content:attr(data-label);color:var(--c-text-3);font-size:12px;letter-spacing:.08em;flex:0 0 auto}
  .footer-grid{grid-template-columns:1fr;gap:0}
  .footer-col--acc{border-bottom:1px solid var(--c-line-soft);padding:14px 0}
  .footer-title{margin-bottom:0;cursor:pointer}
  .acc-arrow{display:inline-flex;color:var(--c-text-3);transition:transform var(--ease)}
  .footer-col--acc.open .acc-arrow{transform:rotate(180deg);color:var(--c-primary)}
  .footer-links,.footer-contact{display:none;margin-top:14px}
  .footer-col--acc.open .footer-links,.footer-col--acc.open .footer-contact{display:block}
  .footer-brand{padding:0 0 20px}
  .footer-bottom{justify-content:center;text-align:center}
}
@media(max-width:575.98px){
  .brand-name{font-size:15px}
  .page-banner h1{font-size:24px}
  .metric-mini .mn{font-size:26px}
  .form-card,.info-card,.side-card{padding:20px}
  .btn{width:100%}
  .nav-right .btn{width:100%}
}

/* roulang page: category3 */
:root{
  --c-bg:#0B0B14;
  --c-bg-alt:#12121E;
  --c-surface:#171727;
  --c-surface-2:#1E1E30;
  --c-primary:#6C4CF1;
  --c-primary-deep:#4A2FD0;
  --c-primary-soft:rgba(108,76,241,.12);
  --c-accent:#22D3EE;
  --c-lime:#B8FF3C;
  --c-text:#F2F3F8;
  --c-text-2:#A7A9BE;
  --c-text-3:#6E7085;
  --c-line:rgba(255,255,255,.08);
  --c-line-soft:rgba(255,255,255,.05);
  --c-ok:#34D399;
  --c-warn:#FFB020;
  --c-err:#FF5C7A;
  --r-card:14px;
  --r-btn:10px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --shadow-hover:0 18px 44px rgba(108,76,241,.22);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
a:hover{color:var(--c-primary);}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--c-text);}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.container{max-width:1280px;}}
.section{padding:88px 0;}
.section--alt{background:var(--c-bg-alt);}
@media (max-width:991px){.section{padding:64px 0;}}
@media (max-width:575px){.section{padding:48px 0;} .container{padding:0 16px;}}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(11,11,20,.94);transition:border-color .2s ease,background-color .2s ease;border-bottom:1px solid transparent;}
.site-header.stuck{background:rgba(11,11,20,.97);border-bottom-color:var(--c-line);}
.topbar{height:38px;border-bottom:1px solid var(--c-line-soft);font-size:12px;color:var(--c-text-3);display:flex;align-items:center;}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:8px;}
.topbar .dot{width:6px;height:6px;border-radius:50%;background:var(--c-lime);display:inline-block;flex:none;}
.topbar-right{display:flex;gap:18px;}
.topbar-right a{color:var(--c-text-2);}
.topbar-right a:hover{color:var(--c-primary);}
.mainnav{height:76px;display:flex;align-items:center;transition:height .2s ease;}
@media (min-width:992px){
  .site-header.stuck .topbar{display:none;}
  .site-header.stuck .mainnav{height:64px;}
}
.nav-inner{display:flex;align-items:center;gap:20px;height:100%;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(140deg,rgba(108,76,241,.9),rgba(34,211,238,.7));color:#fff;flex:none;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:15.5px;font-weight:700;letter-spacing:.01em;color:var(--c-text);}
.brand-sub{font-size:11px;color:var(--c-text-3);letter-spacing:.05em;margin-top:3px;}
.nav-toggle{display:none;background:transparent;border:1px solid var(--c-line);color:var(--c-text);border-radius:9px;padding:8px 10px;margin-left:auto;}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.nav-collapse{display:flex;align-items:center;flex:1;gap:16px;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-links a{display:inline-block;padding:10px 14px;font-size:14.5px;font-weight:500;color:var(--c-text-2);border-radius:9px;position:relative;white-space:nowrap;}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.05);}
.nav-links a.active{color:#fff;}
.nav-links a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;position:relative;}
.btn{--bs-btn-border-radius:10px;border-radius:10px;font-weight:600;padding:12px 24px;border:1px solid transparent;transition:transform .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease;font-size:15px;}
.btn-primary{--bs-btn-bg:#6C4CF1;--bs-btn-border-color:#6C4CF1;--bs-btn-hover-bg:#4A2FD0;--bs-btn-hover-border-color:#4A2FD0;--bs-btn-active-bg:#4A2FD0;--bs-btn-active-border-color:#4A2FD0;--bs-btn-color:#fff;--bs-btn-hover-color:#fff;--bs-btn-active-color:#fff;--bs-btn-disabled-bg:#6C4CF1;--bs-btn-disabled-border-color:#6C4CF1;--bs-btn-disabled-opacity:.4;}
.btn-primary:hover{transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-sm{padding:9px 16px;font-size:13.5px;}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:10px;border:1px solid rgba(108,76,241,.4);color:var(--c-primary);background:transparent;font-weight:600;font-size:15px;}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary);border-color:var(--c-primary);}
.btn-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:14.5px;background:none;border:0;padding:0;}
.btn-arrow svg{transition:transform .18s ease;}
.btn-arrow:hover svg{transform:translateX(4px);}
.mega-toggle{display:inline-flex;align-items:center;gap:7px;background:transparent;border:1px solid var(--c-line);color:var(--c-text-2);border-radius:10px;padding:10px 16px;font-size:14px;font-weight:500;transition:color .18s ease,border-color .18s ease;}
.mega-toggle svg{transition:transform .18s ease;}
.mega-toggle:hover,.mega-toggle[aria-expanded="true"]{color:var(--c-primary);border-color:rgba(108,76,241,.5);}
.mega-toggle[aria-expanded="true"] svg{transform:rotate(180deg);}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:800px;display:none;grid-template-columns:1.15fr .9fr .95fr;gap:26px;padding:26px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;box-shadow:var(--shadow-hover);z-index:70;}
.mega-panel.open{display:grid;}
.mega-col-title{font-size:11.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--c-text-3);font-weight:600;margin-bottom:14px;}
.mega-cats{display:grid;grid-template-columns:1fr 1fr;gap:4px;}
.mega-cats a{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;font-size:13.5px;color:var(--c-text-2);}
.mega-cats a:hover{color:var(--c-primary);background:rgba(255,255,255,.06);}
.mega-cats .ic{width:28px;height:28px;border-radius:8px;background:var(--c-primary-soft);color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;flex:none;}
.mega-list a{display:block;padding:11px 0;border-bottom:1px solid var(--c-line-soft);font-size:13.5px;color:var(--c-text-2);}
.mega-list a:last-child{border-bottom:0;}
.mega-list .date{display:block;font-size:11.5px;color:var(--c-text-3);margin-top:4px;}
.mega-card{display:block;border:1px solid var(--c-line);border-radius:12px;overflow:hidden;background:var(--c-surface-2);}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
.mega-card span{display:block;padding:12px 14px;font-size:13.5px;color:var(--c-text-2);}
.mega-card:hover span{color:var(--c-primary);}

/* ============ Banner ============ */
.banner{position:relative;min-height:240px;display:flex;align-items:flex-end;padding:44px 0 36px;background-image:linear-gradient(rgba(11,11,20,.82),rgba(11,11,20,.95)),url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;border-bottom:1px solid var(--c-line);overflow:hidden;}
.banner::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;opacity:.55;pointer-events:none;}
.banner::after{content:"";position:absolute;right:-140px;top:-160px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(108,76,241,.28),transparent 68%);pointer-events:none;}
.banner .container{position:relative;z-index:2;}
.banner h1{font-size:40px;letter-spacing:-.01em;margin-bottom:12px;}
.banner-desc{font-size:15.5px;color:var(--c-text-2);max-width:640px;margin:0;}
.banner-steps{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2);margin-bottom:14px;}
.banner-steps .bar{width:26px;height:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));border-radius:2px;}
@media (max-width:767px){.banner h1{font-size:30px;} .banner{min-height:200px;padding:32px 0 28px;}}

.breadcrumb-wrap{padding:16px 0 0;font-size:13px;color:var(--c-text-3);}
.breadcrumb-wrap ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;list-style:none;margin:0;padding:0;}
.breadcrumb-wrap li{display:flex;align-items:center;gap:10px;}
.breadcrumb-wrap .sep{width:4px;height:4px;border-radius:50%;background:var(--c-primary);display:inline-block;}
.breadcrumb-wrap a{color:var(--c-text-3);}
.breadcrumb-wrap a:hover{color:var(--c-primary);}
.breadcrumb-wrap .current{color:var(--c-text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60vw;}

/* ============ 区块标题 ============ */
.section-head{margin-bottom:40px;max-width:760px;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--c-text-3);font-weight:600;margin-bottom:14px;}
.section-head .eyebrow::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--c-primary);display:inline-block;}
.section-head h2{font-size:30px;margin-bottom:12px;letter-spacing:-.01em;}
.section-head p{color:var(--c-text-2);font-size:15.5px;max-width:72ch;margin:0;}
@media (max-width:575px){.section-head h2{font-size:24px;} .section-head{margin-bottom:28px;}}

/* ============ 主体布局 ============ */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
@media (max-width:1199px){.layout{grid-template-columns:1fr;gap:40px;}}

/* ============ 时间线 ============ */
.timeline{position:relative;padding-left:0;}
.timeline::before{content:"";position:absolute;left:11px;top:14px;bottom:14px;width:2px;border-radius:2px;background:linear-gradient(180deg,var(--c-primary),rgba(34,211,238,.45));}
.tl-item{position:relative;padding-left:56px;margin-bottom:26px;}
.tl-item:last-child{margin-bottom:0;}
.tl-node{position:absolute;left:4px;top:26px;width:16px;height:16px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 0 4px rgba(108,76,241,.18);}
.tl-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px 26px;box-shadow:var(--shadow-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.35);box-shadow:var(--shadow-hover);}
.tl-num{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--c-primary);font-variant-numeric:tabular-nums;margin-bottom:8px;display:block;}
.tl-card h3{font-size:19px;margin-bottom:10px;}
.tl-card p{color:var(--c-text-2);font-size:15px;margin:0 0 12px;max-width:66ch;}
.tl-points{display:flex;flex-wrap:wrap;gap:10px 22px;}
.tl-points li{position:relative;padding-left:14px;font-size:13.5px;color:var(--c-text-2);}
.tl-points li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--c-primary);}
.tl-card img{width:100%;border-radius:12px;margin-top:16px;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
@media (max-width:575px){
  .timeline::before{left:15px;}
  .tl-item{padding-left:42px;}
  .tl-node{left:8px;top:24px;}
  .tl-card{padding:20px;}
  .tl-card h3{font-size:17px;}
}

/* ============ 对比条 ============ */
.compare-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;border-top:1px solid var(--c-line);padding-top:36px;}
.compare-col{padding-right:8px;}
.compare-col .tick{width:26px;height:26px;border-radius:50%;background:rgba(52,211,153,.14);color:var(--c-ok);display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;}
.compare-col h3{font-size:17px;margin-bottom:8px;}
.compare-col p{font-size:14.5px;color:var(--c-text-2);margin:0;}
@media (max-width:767px){.compare-strip{grid-template-columns:1fr;gap:22px;padding-top:28px;}}

/* ============ 侧栏 ============ */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-card);}
.side-title{font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--c-text);margin-bottom:14px;padding-left:12px;position:relative;}
.side-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;border-radius:2px;background:var(--c-primary);}
.side-links li a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:11px 0;border-bottom:1px solid var(--c-line-soft);font-size:14px;color:var(--c-text-2);}
.side-links li:last-child a{border-bottom:0;}
.side-links li a:hover{color:var(--c-primary);}
.side-links li a.current{color:var(--c-primary);font-weight:600;}
.side-card p{font-size:13.5px;color:var(--c-text-2);margin-bottom:14px;}
.side-info li{display:flex;gap:10px;font-size:13.5px;color:var(--c-text-2);padding:7px 0;}
.side-info li span:first-child{color:var(--c-text-3);flex:none;}
@media (max-width:1199px){.sidebar{position:static;}}

/* ============ FAQ ============ */
.faq-acc{border-top:1px solid var(--c-line);max-width:860px;margin:0 auto;}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;--bs-accordion-border-width:0;--bs-accordion-border-radius:0;--bs-accordion-inner-border-radius:0;--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-active-bg:transparent;--bs-accordion-active-color:#6C4CF1;--bs-accordion-btn-color:#F2F3F8;}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line);}
.faq-acc .accordion-button{background:transparent;color:var(--c-text);font-size:18px;font-weight:600;padding:20px 0 20px 16px;border-radius:0;box-shadow:none;position:relative;line-height:1.5;}
.faq-acc .accordion-button::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:2px;background:transparent;transition:background-color .18s ease;}
.faq-acc .accordion-button:not(.collapsed)::before{background:var(--c-primary);}
.faq-acc .accordion-button:not(.collapsed){color:var(--c-primary);}
.faq-acc .accordion-button:hover{color:var(--c-primary);}
.faq-acc .accordion-button::after{width:16px;height:16px;background-size:16px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A7A9BE' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");transition:transform .18s ease;}
.faq-acc .accordion-button:not(.collapsed)::after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236C4CF1' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");transform:rotate(180deg);}
.faq-acc .accordion-body{padding:0 40px 22px 16px;font-size:15px;line-height:1.8;color:var(--c-text-2);}
@media (max-width:575px){.faq-acc .accordion-button{font-size:16px;padding:16px 0 16px 14px;} .faq-acc .accordion-body{padding:0 10px 18px 14px;}}

/* ============ CTA / 表单 ============ */
.section--cta{background:var(--c-bg-alt);position:relative;overflow:hidden;}
.section--cta::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.cta-copy h2{font-size:30px;margin-bottom:16px;letter-spacing:-.01em;}
.cta-copy p{color:var(--c-text-2);font-size:15.5px;max-width:60ch;}
.cta-points{margin:22px 0;}
.cta-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-text-2);padding-bottom:10px;}
.cta-points li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--c-lime);}
.cta-meta{display:flex;flex-wrap:wrap;gap:14px 28px;border-top:1px solid var(--c-line);padding-top:20px;font-size:13.5px;color:var(--c-text-3);}
.cta-meta strong{display:block;color:var(--c-text);font-size:14.5px;font-weight:600;margin-bottom:2px;}
.form-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-card);}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .form-sub{font-size:13.5px;color:var(--c-text-3);margin-bottom:20px;}
.form-group{margin-bottom:16px;}
.form-group label{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:7px;font-weight:500;}
.form-control,.form-select{background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:10px;color:var(--c-text);padding:11px 14px;font-size:14.5px;width:100%;transition:border-color .18s ease,box-shadow .18s ease;}
.form-control::placeholder{color:var(--c-text-3);}
.form-control:focus,.form-select:focus{background:var(--c-surface-2);color:var(--c-text);border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(108,76,241,.12);outline:none;}
.form-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A7A9BE' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:14px;padding-right:38px;}
.form-select option{background:var(--c-surface);color:var(--c-text);}
.form-card .btn-primary{width:100%;margin-top:6px;}
.form-note{font-size:12px;color:var(--c-text-3);margin:12px 0 0;line-height:1.6;}
.form-ok{display:none;margin-top:14px;padding:11px 14px;border-radius:10px;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.35);color:var(--c-ok);font-size:13.5px;}
.form-ok.show{display:block;}
@media (max-width:991px){.cta-grid{grid-template-columns:1fr;gap:32px;} .cta-copy h2{font-size:24px;}}
@media (max-width:575px){.form-card{padding:20px;}}

/* ============ 互链卡片 ============ */
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.link-card{display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;}
.link-card:hover{transform:translateY(-3px);border-color:rgba(108,76,241,.35);box-shadow:var(--shadow-hover);color:inherit;}
.link-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
.link-card .lc-body{padding:20px 22px 22px;}
.badge-tag{display:inline-block;font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--c-primary);background:var(--c-primary-soft);border-radius:999px;padding:4px 12px;font-weight:600;margin-bottom:12px;}
.link-card h3{font-size:17px;margin-bottom:8px;}
.link-card p{font-size:14px;color:var(--c-text-2);margin:0 0 14px;}
@media (max-width:991px){.link-cards{grid-template-columns:1fr 1fr;}}
@media (max-width:575px){.link-cards{grid-template-columns:1fr;}}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-bg);border-top:1px solid var(--c-line);position:relative;padding:64px 0 0;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));opacity:.75;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand p{font-size:13.5px;color:var(--c-text-2);margin:16px 0 18px;max-width:36ch;}
.socials{display:flex;gap:10px;}
.socials a{width:34px;height:34px;border-radius:9px;border:1px solid var(--c-line);display:inline-flex;align-items:center;justify-content:center;color:var(--c-text-2);}
.socials a:hover{color:var(--c-primary);border-color:rgba(108,76,241,.5);background:var(--c-primary-soft);}
.footer-title{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--c-text);display:flex;align-items:center;justify-content:space-between;}
.acc-arrow{display:none;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:13.5px;color:var(--c-text-2);}
.footer-links a:hover{color:var(--c-primary);}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--c-text-2);margin-bottom:12px;}
.footer-contact li span:first-child{color:var(--c-text-3);flex:none;}
.footer-bottom{border-top:1px solid var(--c-line-soft);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--c-text-3);}
.footer-bottom a{color:var(--c-text-3);}
.footer-bottom a:hover{color:var(--c-primary);}
@media (max-width:991px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-col--acc .footer-links{display:none;}
  .footer-col--acc.open .footer-links{display:block;}
  .footer-col--acc .footer-title{cursor:pointer;}
  .acc-arrow{display:inline-flex;color:var(--c-text-3);transition:transform .18s ease;}
  .footer-col--acc.open .acc-arrow{transform:rotate(180deg);}
}
@media (max-width:575px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{justify-content:center;text-align:center;}
}

/* ============ 移动端导航 ============ */
@media (max-width:991px){
  .nav-toggle{display:inline-flex;}
  .mainnav{height:auto;padding:14px 0;}
  .nav-collapse{display:none;position:fixed;left:0;right:0;top:114px;bottom:0;background:var(--c-bg-alt);border-top:1px solid var(--c-line);padding:20px 24px 40px;overflow-y:auto;flex-direction:column;align-items:stretch;gap:0;z-index:900;}
  .nav-collapse.open{display:flex;}
  .nav-links{flex-direction:column;align-items:stretch;gap:0;margin:0;}
  .nav-links a{display:block;padding:15px 0;border-bottom:1px solid var(--c-line-soft);font-size:16px;border-radius:0;}
  .nav-links a:hover{background:transparent;}
  .nav-links a.active::after{display:none;}
  .nav-links a.active{color:var(--c-primary);}
  .nav-right{margin-left:0;flex-direction:column;align-items:stretch;gap:12px;margin-top:22px;}
  .nav-right .btn-primary{width:100%;text-align:center;}
  .mega-toggle{justify-content:space-between;width:100%;padding:12px 16px;}
  .mega-panel{position:static;width:100%;display:none;grid-template-columns:1fr;gap:22px;margin-top:14px;box-shadow:none;}
  .mega-panel.open{display:grid;}
}

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