/* roulang page: index */
:root{
  --bg:#0B0E11;
  --panel:#12161B;
  --panel-2:#171C22;
  --card:#14181D;
  --brand:#2EE6A8;
  --brand-deep:#17B384;
  --amber:#FFB545;
  --purple:#8A6BFF;
  --text:#E6ECF2;
  --text-2:#9AA6B2;
  --text-3:#6B7683;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(46,230,168,.30);
  --glow:0 0 24px rgba(46,230,168,.35);
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sec-gap:112px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
::selection{background:rgba(46,230,168,.28);color:#fff;}

.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-gap) 0;}
.section-tight{padding:88px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);font-family:var(--mono);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand),transparent);}
.sec-title{font-size:clamp(24px,3vw,40px);margin-bottom:14px;}
.sec-desc{color:var(--text-2);font-size:16px;max-width:680px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;margin-bottom:44px;}
.muted{color:var(--text-2);}
.mono{font-family:var(--mono);}

/* ---------- 按钮 ---------- */
.btn-neon,.btn-ghost,.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);font-weight:600;font-size:15px;
  padding:13px 26px;border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);white-space:nowrap;
}
.btn-neon{background:var(--brand);color:#06120D;box-shadow:0 8px 24px rgba(46,230,168,.18);}
.btn-neon:hover{background:#4bf0b8;color:#06120D;box-shadow:var(--glow);transform:translateY(-2px);}
.btn-neon:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.18);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(46,230,168,.06);transform:translateY(-2px);}
.btn-soft{background:rgba(255,181,69,.12);color:var(--amber);border-color:rgba(255,181,69,.28);}
.btn-soft:hover{background:rgba(255,181,69,.2);color:var(--amber);}
.btn-sm-neon{padding:9px 18px;font-size:14px;border-radius:9px;}
.link-more{color:var(--brand);font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:6px;}
.link-more i{transition:transform .2s var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;height:68px;
  background:rgba(11,14,17,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,.15) 40%,transparent 75%);
}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-dot{
  width:12px;height:12px;border-radius:4px;
  background:linear-gradient(140deg,var(--brand),var(--purple));
  box-shadow:var(--glow);flex-shrink:0;
}
.brand-text{display:flex;align-items:baseline;gap:2px;font-size:21px;line-height:1;}
.brand-latin{font-family:var(--mono);font-weight:500;letter-spacing:-.02em;color:var(--text);}
.brand-cn{font-weight:700;color:var(--text);letter-spacing:.02em;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;color:var(--text-2);
  border-radius:8px;transition:color .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link.active{color:var(--brand);text-shadow:0 0 14px rgba(46,230,168,.45);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:var(--glow);
  animation:breathe 2.4s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.55;}50%{opacity:1;}}
.header-actions{display:flex;align-items:center;gap:12px;}
.drawer-btn{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);color:var(--text);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .2s var(--ease);
}
.drawer-btn:hover{border-color:var(--brand);color:var(--brand);}

.drawer{
  position:fixed;inset:0;z-index:1055;background:rgba(8,10,13,.98);
  padding:20px 24px;display:flex;flex-direction:column;
  transform:translateY(-100%);opacity:0;pointer-events:none;
  transition:transform .32s var(--ease),opacity .32s var(--ease);
}
.drawer.open{transform:translateY(0);opacity:1;pointer-events:auto;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:48px;margin-bottom:24px;}
.drawer-close{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--text);cursor:pointer;}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer nav{display:flex;flex-direction:column;}
.drawer nav a{
  padding:0 16px;height:56px;display:flex;align-items:center;
  border-left:2px solid transparent;color:var(--text-2);font-size:17px;
}
.drawer nav a:hover{color:var(--text);background:rgba(255,255,255,.03);}
.drawer nav a.active{color:var(--brand);border-left-color:var(--brand);background:rgba(46,230,168,.06);}
.drawer .btn-neon{margin-top:auto;width:100%;padding:15px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 88px;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(1100px 520px at 12% 18%, rgba(11,14,17,.94) 0%, rgba(11,14,17,.72) 46%, rgba(11,14,17,.42) 100%),
    linear-gradient(90deg,#0B0E11 8%,rgba(11,14,17,.86) 48%,rgba(11,14,17,.55) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.35;pointer-events:none;
  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:56px 56px;
  mask-image:radial-gradient(720px 420px at 25% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(720px 420px at 25% 30%,#000 0%,transparent 78%);
}
.hero .shell{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.14;margin-bottom:20px;}
.hero h1 .hl{
  background:linear-gradient(100deg,var(--brand) 0%,#7de9c8 55%,var(--amber) 120%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:18px;color:var(--text-2);margin-bottom:34px;max-width:520px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px;}
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat-item{padding:18px 16px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:0;}
.stat-num{font-family:var(--mono);font-size:26px;font-weight:600;color:var(--brand);line-height:1.2;}
.stat-num .unit{font-size:13px;color:var(--text-2);margin-left:4px;font-family:var(--font-cn);font-weight:400;}
.stat-label{font-size:13px;color:var(--text-3);margin-top:4px;}

.hero-visual{position:relative;}
.hero-visual .frame{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  background:var(--panel);
}
.hero-visual .frame img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-visual .frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,17,.05) 40%,rgba(11,14,17,.82) 100%);
}
.hero-visual .caption{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.hero-visual .caption span{font-size:14px;color:var(--text-2);}
.float-card{
  position:absolute;left:-22px;bottom:52px;z-index:3;
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 18px;box-shadow:var(--shadow);min-width:170px;
}
.float-card .fc-num{font-family:var(--mono);color:var(--amber);font-size:20px;font-weight:600;}
.float-card .fc-txt{font-size:12px;color:var(--text-3);}

/* ---------- 通用卡片 ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;line-height:1.7;
}
.badge-brand{background:rgba(46,230,168,.12);color:var(--brand);}
.badge-amber{background:rgba(255,181,69,.12);color:var(--amber);}
.badge-purple{background:rgba(138,107,255,.14);color:#b3a2ff;}

/* ---------- 权益对比表 ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:var(--card);box-shadow:var(--shadow);
}
.compare-table{width:100%;border-collapse:separate;border-spacing:0;min-width:760px;}
.compare-table thead th{
  position:sticky;top:0;z-index:3;
  background:var(--panel-2);color:var(--text);
  font-size:14px;font-weight:600;text-align:left;
  padding:18px 20px;border-bottom:1px solid var(--line);
}
.compare-table thead th:first-child{color:var(--text-2);font-weight:500;}
.compare-table thead th.spot{color:var(--brand);}
.compare-table tbody td{
  height:56px;padding:12px 20px;font-size:14.5px;color:var(--text-2);
  border-bottom:1px solid rgba(255,255,255,.05);
  position:relative;
}
.compare-table tbody tr:nth-child(even) td{background:rgba(255,255,255,.03);}
.compare-table tbody tr{transition:background .2s var(--ease);}
.compare-table tbody tr:hover td{background:rgba(46,230,168,.05);}
.compare-table tbody tr:hover td:first-child::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--brand);box-shadow:var(--glow);
}
.compare-table td .yes{color:var(--brand);font-size:15px;}
.compare-table td .no{color:var(--text-3);}
.table-scroll{overflow-x:auto;scrollbar-width:thin;}

/* ---------- 等级亮点 ---------- */
.level-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px;}
.level-card{
  position:relative;padding:30px 26px;border-radius:var(--radius-lg);
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.level-card:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.level-card .lv-index{
  font-family:var(--mono);font-size:56px;line-height:1;font-weight:600;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.20);
  margin-bottom:10px;
}
.level-card h3{font-size:22px;margin-bottom:6px;}
.level-card .lv-tag{font-size:13px;color:var(--text-3);margin-bottom:20px;}
.level-card ul{display:flex;flex-direction:column;gap:10px;margin-bottom:26px;}
.level-card ul li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);}
.level-card ul li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;
  background:var(--brand);opacity:.75;
}
.level-card .lv-cta{margin-top:auto;}
.level-card.is-top{
  border-color:var(--line-strong);
  box-shadow:0 18px 50px rgba(0,0,0,.45),0 0 34px rgba(46,230,168,.12);
}
.level-card.is-top .lv-index{color:rgba(46,230,168,.16);-webkit-text-stroke:1px rgba(46,230,168,.45);}
.level-card.is-top::before{
  content:"";position:absolute;inset:0;border-radius:var(--radius-lg);pointer-events:none;
  background:linear-gradient(160deg,rgba(46,230,168,.08),transparent 42%);
}
.lv-a{grid-column:span 3;}
.lv-b{grid-column:span 3;}
.lv-c{grid-column:span 3;}
.lv-d{grid-column:span 3;}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{
  position:relative;padding:28px 22px 26px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.step:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.step .st-no{
  font-family:var(--mono);font-size:13px;color:var(--brand);
  letter-spacing:.14em;margin-bottom:14px;display:block;
}
.step h3{font-size:18px;margin-bottom:10px;}
.step p{font-size:14px;color:var(--text-2);line-height:1.8;}
.step::after{
  content:"";position:absolute;right:-11px;top:50px;width:22px;height:1px;
  background:linear-gradient(90deg,var(--line),transparent);
}
.step:last-child::after{display:none;}

/* ---------- 专属内容预览 ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.pv-card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--card);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.pv-card:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.pv-card img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.pv-card:hover img{transform:scale(1.03);}
.pv-media{position:relative;overflow:hidden;}
.pv-lock{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg,rgba(11,14,17,.30),rgba(11,14,17,.86));
  color:var(--text);transition:opacity .25s var(--ease);
}
.pv-lock i{font-size:20px;color:var(--brand);}
.pv-card:hover .pv-lock{opacity:.72;}
.pv-body{padding:16px 18px 18px;}
.pv-body h3{font-size:16.5px;margin-bottom:6px;}
.pv-body p{font-size:13.5px;color:var(--text-3);}
.pv-badge{position:absolute;top:12px;right:12px;z-index:2;}
.pv-lg{grid-column:span 6;}
.pv-lg .pv-media{aspect-ratio:16/9;}
.pv-md{grid-column:span 3;}
.pv-md .pv-media{aspect-ratio:4/3;}
.pv-sm{grid-column:span 3;}
.pv-sm .pv-media{aspect-ratio:1/1;}

/* ---------- CMS 列表 ---------- */
.post-hero{
  display:grid;grid-template-columns:7fr 5fr;gap:0;
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:var(--card);box-shadow:var(--shadow);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.post-hero:hover{border-color:var(--line-strong);transform:translateY(-2px);}
.post-hero .ph-media{position:relative;overflow:hidden;min-height:280px;}
.post-hero .ph-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.post-hero:hover .ph-media img{transform:scale(1.03);}
.post-hero .ph-body{padding:34px 32px;display:flex;flex-direction:column;gap:14px;}
.post-hero h3{font-size:clamp(20px,2.2vw,26px);line-height:1.4;}
.post-hero h3 a:hover{color:var(--brand);}
.post-hero .ph-sum{font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.post-meta .time{font-family:var(--mono);}
.post-list{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px;}
.post-row{
  display:flex;gap:16px;padding:16px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.post-row:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.post-row .pr-media{width:112px;flex-shrink:0;border-radius:10px;overflow:hidden;}
.post-row .pr-media img{width:100%;height:100%;min-height:86px;object-fit:cover;}
.post-row h3{font-size:16px;margin:8px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-row h3 a:hover{color:var(--brand);}
.post-row .pr-sum{font-size:13px;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px;}
.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--line);
  border-radius:var(--radius);background:var(--panel);color:var(--text-2);
}
.empty-state p{margin-bottom:18px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:transparent !important;border:0 !important;
  border-bottom:1px solid var(--line) !important;border-radius:0 !important;
}
.accordion-button{
  background:transparent !important;color:var(--text) !important;
  box-shadow:none !important;font-size:17px;font-weight:600;
  padding:22px 44px 22px 18px !important;position:relative;
  border-radius:0 !important;transition:color .2s var(--ease);
}
.accordion-button::after{display:none;}
.accordion-button .fx{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:8px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-2);font-size:12px;transition:transform .28s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.accordion-button:not(.collapsed){color:var(--brand) !important;}
.accordion-button:not(.collapsed) .fx{transform:translateY(-50%) rotate(180deg);color:var(--brand);border-color:var(--line-strong);}
.accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.accordion-button::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .24s var(--ease);
}
.accordion-button:not(.collapsed)::before{opacity:1;box-shadow:var(--glow);}
.accordion-body{
  padding:0 44px 24px 18px !important;color:var(--text-2);
  font-size:15px;line-height:1.85;
}

/* ---------- CTA 表单 ---------- */
.cta-panel{
  border-radius:var(--radius-lg);border:1px solid var(--line);
  background:
    radial-gradient(720px 320px at 8% 0%,rgba(46,230,168,.10),transparent 62%),
    radial-gradient(520px 300px at 96% 100%,rgba(138,107,255,.10),transparent 60%),
    var(--panel);
  padding:52px 48px;box-shadow:var(--shadow);overflow:hidden;
}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:start;}
.cta-panel h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.cta-notes{display:flex;flex-direction:column;gap:14px;margin-top:28px;}
.cta-notes li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);}
.cta-notes li i{color:var(--brand);margin-top:4px;}
.form-card{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.form-label{font-size:13.5px;color:var(--text-2);margin-bottom:8px;display:block;}
.form-control,.form-select{
  background:var(--panel) !important;border:1px solid var(--line) !important;
  color:var(--text) !important;border-radius:var(--radius-sm) !important;
  height:48px;font-size:15px;padding:0 16px;
  box-shadow:none !important;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.form-control::placeholder{color:var(--text-3);}
.form-control:focus,.form-select:focus{border-color:var(--brand) !important;box-shadow:0 0 0 3px rgba(46,230,168,.14) !important;}
.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%239AA6B2'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E") !important;}
.form-select option{background:var(--panel);color:var(--text);}
.form-tip{font-size:12.5px;color:var(--text-3);margin-top:10px;}
.form-row{margin-bottom:18px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0A0C0F;border-top:1px solid var(--line);position:relative;
  padding:72px 0 0;margin-top:24px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,.16) 38%,transparent 78%);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-size:20px;}
.footer-brand .brand-cn{font-weight:700;}
.footer-brand .brand-latin{font-family:var(--mono);font-weight:500;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:18px;letter-spacing:.06em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--brand);}
.footer-desc{font-size:14px;color:var(--text-3);line-height:1.85;max-width:330px;}
.footer-contact li{font-size:14px;color:var(--text-2);display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;
  align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sec-gap:88px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:991px){
  :root{--sec-gap:72px;}
  .main-nav{display:none;}
  .hero{padding:72px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-visual{order:-1;}
  .float-card{display:none;}
  .level-grid .lv-a,.level-grid .lv-b,.level-grid .lv-c,.level-grid .lv-d{grid-column:span 6;}
  .steps{grid-template-columns:1fr 1fr;}
  .step::after{display:none;}
  .pv-lg{grid-column:span 12;}
  .pv-md,.pv-sm{grid-column:span 6;}
  .post-hero{grid-template-columns:1fr;}
  .post-hero .ph-media{min-height:220px;}
  .post-list{grid-template-columns:1fr;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .cta-panel{padding:36px 26px;}
}
@media (max-width:767px){
  .shell{padding:0 18px;}
  .stat-bar{grid-template-columns:1fr 1fr;}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .compare-table{min-width:0;}
  .table-scroll{overflow:visible;}
  .compare-table thead{display:none;}
  .compare-table,.compare-table tbody,.compare-table tr,.compare-table td{display:block;width:100%;}
  .compare-table tbody tr{
    border:1px solid var(--line);border-radius:var(--radius);
    margin-bottom:14px;padding:8px 4px;background:var(--card);
  }
  .compare-table tbody tr:nth-child(even) td{background:transparent;}
  .compare-table tbody td{
    height:auto;padding:11px 16px;border-bottom:1px solid rgba(255,255,255,.05);
    display:flex;justify-content:space-between;gap:18px;text-align:right;
  }
  .compare-table tbody td:last-child{border-bottom:0;}
  .compare-table tbody td::before{
    content:attr(data-label);color:var(--text);font-weight:600;font-size:13.5px;text-align:left;
  }
  .compare-table tbody tr:hover td:first-child::before{display:none;}
  .level-grid .lv-a,.level-grid .lv-b,.level-grid .lv-c,.level-grid .lv-d{grid-column:span 12;}
  .steps{grid-template-columns:1fr;}
  .pv-md,.pv-sm{grid-column:span 12;}
  .post-row{flex-direction:column;}
  .post-row .pr-media{width:100%;}
  .post-row .pr-media img{min-height:150px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:519px){
  .hero h1{font-size:30px;}
  .hero-sub{font-size:16px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn-neon,.hero-cta .btn-ghost{width:100%;}
  .stat-item{padding:14px 12px;}
  .stat-num{font-size:22px;}
  .cta-panel{padding:28px 18px;}
  .form-card{padding:20px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg:#0B0E11;
  --bg-deep:#0A0C0F;
  --panel:#12161B;
  --panel-2:#171C22;
  --card:#14181D;
  --primary:#2EE6A8;
  --primary-dark:#17B384;
  --amber:#FFB545;
  --violet:#8A6BFF;
  --text:#E6ECF2;
  --text-2:#9AA6B2;
  --text-3:#6B7683;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glow:0 0 24px rgba(46,230,168,.35);
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:18px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 480px at 12% -6%,rgba(46,230,168,.10),transparent 62%),
    radial-gradient(760px 420px at 96% 4%,rgba(138,107,255,.09),transparent 60%);
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--primary);}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.3;color:var(--text);}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:2;}
.mono{font-family:var(--font-mono);}

/* ============ 顶部导航 ============ */
.read-progress{
  position:fixed;top:0;left:0;height:2px;width:0%;
  background:linear-gradient(90deg,var(--primary),var(--amber));
  box-shadow:0 0 12px rgba(46,230,168,.6);
  z-index:1200;transition:width .1s linear;
}
.site-header{
  position:sticky;top:0;z-index:1100;
  background:rgba(11,14,17,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--primary),rgba(46,230,168,0) 62%);
}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-dot{
  width:12px;height:12px;border-radius:4px;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  box-shadow:var(--glow);display:inline-block;
}
.brand-text{display:flex;align-items:baseline;gap:2px;font-size:21px;line-height:1;}
.brand-latin{font-family:var(--font-mono);font-weight:600;color:var(--text);letter-spacing:.04em;}
.brand-cn{font-weight:700;color:var(--primary);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.main-nav .nav-link{
  position:relative;display:inline-block;padding:10px 14px;font-size:15px;
  color:var(--text-2);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);
}
.main-nav .nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.main-nav .nav-link.active{color:var(--primary);text-shadow:0 0 14px rgba(46,230,168,.5);}
.main-nav .nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 12px rgba(46,230,168,.8);
  animation:breathe 2.4s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.65}50%{opacity:1}}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);color:var(--text);font-size:17px;cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(46,230,168,.4);color:var(--primary);}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(5,7,9,.78);backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s;z-index:1150;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--bg-deep);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s var(--ease);
  z-index:1160;padding:22px 20px;display:flex;flex-direction:column;gap:6px;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open .drawer{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{background:none;border:1px solid var(--line);color:var(--text-2);width:38px;height:38px;border-radius:10px;cursor:pointer;}
.drawer-close:hover{color:var(--primary);border-color:rgba(46,230,168,.4);}
.drawer a.drawer-link{
  display:flex;align-items:center;height:56px;padding:0 14px;border-radius:10px;
  color:var(--text-2);font-size:16px;border-left:2px solid transparent;
}
.drawer a.drawer-link:hover{background:rgba(255,255,255,.04);color:var(--text);}
.drawer a.drawer-link.active{color:var(--primary);border-left-color:var(--primary);background:rgba(46,230,168,.07);}
.drawer .drawer-cta{margin-top:16px;}

/* ============ 按钮 ============ */
.btn-neo{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary-neo{background:var(--primary);color:#06120D;}
.btn-primary-neo:hover{background:#4DF0BC;color:#06120D;box-shadow:var(--glow);transform:translateY(-1px);}
.btn-ghost-neo{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn-ghost-neo:hover{border-color:var(--primary);color:var(--primary);background:rgba(46,230,168,.06);}
.btn-amber-neo{background:var(--amber);color:#1A1206;}
.btn-amber-neo:hover{background:#FFC86B;color:#1A1206;box-shadow:0 0 22px rgba(255,181,69,.35);}
.btn-sm-neo{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;}
.btn-text:hover{color:#4DF0BC;}
.btn-text i{transition:transform .2s var(--ease);}
.btn-text:hover i{transform:translateX(3px);}

/* ============ 面包屑 / 文章头 ============ */
.page-top{padding:34px 0 0;}
.breadcrumb-neo{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);}
.breadcrumb-neo a{color:var(--text-2);}
.breadcrumb-neo a:hover{color:var(--primary);}
.breadcrumb-neo .sep{color:var(--text-3);opacity:.7;}
.breadcrumb-neo .current{color:var(--text);}

.article-hero{padding:26px 0 0;}
.article-hero .kicker{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(46,230,168,.12);color:var(--primary);font-size:12.5px;font-weight:600;letter-spacing:.04em;
}
.article-hero h1{
  margin:18px 0 16px;font-size:clamp(28px,3.6vw,46px);font-weight:700;letter-spacing:.02em;line-height:1.28;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  font-size:13.5px;color:var(--text-2);
}
.article-meta .item{display:inline-flex;align-items:center;gap:7px;}
.article-meta .item i{color:var(--primary);opacity:.85;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}
.title-rule{
  height:1px;margin-top:26px;border:0;
  background:linear-gradient(90deg,var(--primary),rgba(138,107,255,.5) 42%,rgba(255,255,255,0));
}

/* ============ 布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:56px;
  padding:52px 0 0;align-items:start;
}
.article-main{min-width:0;}
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:22px;}

/* 正文排版 */
.article-body{
  max-width:800px;font-size:16.5px;line-height:1.85;color:var(--text);
}
.article-body > * + *{margin-top:20px;}
.article-body p{margin:0 0 20px;color:#DCE4EC;}
.article-body h2{
  position:relative;margin:48px 0 18px;padding-left:14px;
  font-size:clamp(20px,2.2vw,26px);font-weight:700;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--violet));
  box-shadow:0 0 14px rgba(46,230,168,.5);
}
.article-body h3{margin:34px 0 12px;font-size:20px;font-weight:600;color:var(--text);}
.article-body h4{margin:26px 0 10px;font-size:17px;font-weight:600;color:var(--text-2);}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:0;}
.article-body ul li,.article-body ol li{
  position:relative;padding-left:26px;margin-bottom:10px;color:#DCE4EC;
}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(46,230,168,.5);
}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:1px;
  font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--amber);
  width:20px;text-align:left;
}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--primary);
  background:rgba(46,230,168,.06);border-radius:0 var(--radius) var(--radius) 0;
  color:var(--text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:12px;margin:24px 0 8px;box-shadow:var(--shadow);width:100%;
}
.article-body figure{margin:26px 0;}
.article-body figcaption{margin-top:10px;font-size:13.5px;color:var(--text-3);text-align:center;}
.article-body table{
  display:block;overflow-x:auto;width:100%;min-width:0;margin:26px 0;border-collapse:separate;border-spacing:0;
  border:1px solid var(--line);border-radius:var(--radius);font-size:15px;
}
.article-body thead th{
  background:var(--panel-2);color:var(--text);font-weight:600;text-align:left;
  padding:14px 16px;white-space:nowrap;border-bottom:1px solid var(--line);
}
.article-body tbody td{padding:13px 16px;border-bottom:1px solid rgba(255,255,255,.05);color:var(--text-2);white-space:nowrap;}
.article-body tbody tr:nth-child(even) td{background:rgba(255,255,255,.03);}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body code{
  font-family:var(--font-mono);font-size:14px;padding:2px 7px;border-radius:6px;
  background:var(--panel-2);color:var(--primary);border:1px solid var(--line);
}
.article-body pre{
  margin:24px 0;padding:18px 20px;border-radius:var(--radius);overflow-x:auto;
  background:var(--panel);border:1px solid var(--line);
}
.article-body pre code{background:none;border:0;padding:0;color:var(--text-2);}
.article-body hr{border:0;height:1px;margin:36px 0;background:linear-gradient(90deg,rgba(46,230,168,.5),rgba(255,255,255,0));}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(46,230,168,.35);}
.article-body a:hover{color:#4DF0BC;border-bottom-color:#4DF0BC;}

.tip-card{
  margin:28px 0;padding:20px 22px;border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(46,230,168,.09),rgba(23,28,34,.9));
  border:1px solid rgba(46,230,168,.22);
}
.tip-card strong{display:block;margin-bottom:6px;color:var(--primary);font-size:15px;}
.tip-card p{margin:0;color:var(--text-2);font-size:15px;}

/* 空状态 */
.article-empty{
  max-width:760px;padding:44px 30px;border:1px dashed var(--line-strong);border-radius:var(--radius-lg);
  background:var(--panel);text-align:center;
}
.article-empty .icon{
  width:58px;height:58px;margin:0 auto 18px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,181,69,.12);color:var(--amber);font-size:22px;
}
.article-empty h2{font-size:22px;margin-bottom:10px;}
.article-empty p{color:var(--text-2);font-size:15px;margin-bottom:22px;}

/* 标签与底部 */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:38px 0 0;}
.tag-neo{
  display:inline-flex;align-items:center;height:30px;padding:0 13px;border-radius:999px;
  font-size:13px;color:var(--text-2);background:var(--panel-2);border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.tag-neo:hover{color:var(--primary);border-color:rgba(46,230,168,.4);}
.tag-neo.amber{background:rgba(255,181,69,.12);color:var(--amber);border-color:transparent;}

.article-foot{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  margin-top:30px;padding:22px 24px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--line);
}
.article-foot .back-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--text-2);}
.article-foot .back-link:hover{color:var(--primary);}
.article-foot .foot-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* 侧栏 */
.side-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px 22px 18px;box-shadow:var(--shadow);
}
.side-card h3{
  font-size:15px;letter-spacing:.06em;color:var(--text-2);font-weight:600;
  display:flex;align-items:center;gap:9px;margin-bottom:16px;
}
.side-card h3::before{
  content:"";width:3px;height:14px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px rgba(46,230,168,.6);
}
.toc-list li{margin-bottom:2px;}
.toc-list a{
  display:block;padding:9px 12px;border-radius:9px;font-size:14.5px;color:var(--text-2);
  border-left:2px solid transparent;
}
.toc-list a:hover{background:rgba(255,255,255,.04);color:var(--text);border-left-color:var(--primary);}
.side-cta{background:linear-gradient(150deg,rgba(46,230,168,.12),rgba(23,28,34,.95));border-color:rgba(46,230,168,.24);}
.side-cta p{font-size:14.5px;color:var(--text-2);margin:0 0 16px;}
.side-cta h3::before{background:var(--amber);box-shadow:0 0 10px rgba(255,181,69,.6);}
.hot-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05);}
.hot-list li:last-child{border-bottom:0;padding-bottom:0;}
.hot-list .num{font-family:var(--font-mono);font-size:14px;color:var(--amber);flex-shrink:0;padding-top:2px;}
.hot-list .txt{font-size:14.5px;color:var(--text-2);line-height:1.6;}
.hot-list a:hover .txt{color:var(--primary);}
.side-mobile-toggle{display:none;}

/* ============ 相关推荐 ============ */
.section{padding:96px 0 0;}
.section-head{margin-bottom:38px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;
  letter-spacing:.16em;color:var(--primary);text-transform:uppercase;
}
.section-head h2{margin:12px 0 10px;font-size:clamp(23px,2.8vw,34px);}
.section-head p{color:var(--text-2);font-size:15.5px;margin:0;max-width:620px;}
.section-head.with-action{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card-neo{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card-neo:hover{transform:translateY(-2px);border-color:rgba(46,230,168,.3);box-shadow:0 22px 54px rgba(0,0,0,.5);}
.card-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--panel-2);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.card-neo:hover .card-media img{transform:scale(1.03);}
.card-media .badge-float{
  position:absolute;left:14px;top:14px;height:26px;padding:0 11px;border-radius:999px;
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;
  background:rgba(46,230,168,.16);color:var(--primary);backdrop-filter:blur(6px);
}
.card-media .badge-float.amber{background:rgba(255,181,69,.18);color:var(--amber);}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:17.5px;line-height:1.5;margin-bottom:10px;}
.card-body p{font-size:14.5px;color:var(--text-2);margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);}
.card-foot .tm{font-family:var(--font-mono);}

/* ============ FAQ ============ */
.faq-wrap{max-width:940px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;padding:22px 0;display:flex;align-items:center;gap:16px;
  text-align:left;color:var(--text);font-size:17px;font-weight:600;cursor:pointer;position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:-16px;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:var(--primary);opacity:0;box-shadow:0 0 12px rgba(46,230,168,.7);transition:opacity .2s var(--ease);
}
.faq-item.open .faq-q::before{opacity:1;}
.faq-q .ic{
  margin-left:auto;flex-shrink:0;width:26px;height:26px;border-radius:8px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:12px;
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.faq-item.open .faq-q .ic{transform:rotate(180deg);border-color:rgba(46,230,168,.4);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a-inner{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px;}

/* ============ CTA ============ */
.cta-panel{
  margin-top:96px;padding:52px 48px;border-radius:var(--radius-lg);
  background:
    radial-gradient(560px 260px at 88% 0%,rgba(46,230,168,.16),transparent 62%),
    linear-gradient(150deg,var(--panel-2),var(--bg-deep));
  border:1px solid rgba(46,230,168,.2);
  display:grid;grid-template-columns:1.25fr .9fr;gap:44px;align-items:center;
}
.cta-panel h2{font-size:clamp(23px,2.8vw,32px);margin-bottom:14px;}
.cta-panel p{color:var(--text-2);font-size:15.5px;margin-bottom:26px;max-width:520px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-points{display:flex;flex-direction:column;gap:14px;}
.cta-point{
  display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:var(--radius);
  background:rgba(255,255,255,.03);border:1px solid var(--line);
}
.cta-point i{color:var(--primary);margin-top:4px;}
.cta-point span{font-size:14.5px;color:var(--text-2);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:110px;background:var(--bg-deep);border-top:1px solid var(--line);position:relative;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,var(--primary),rgba(138,107,255,.4) 46%,rgba(255,255,255,0));
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:62px 0 42px;
}
.footer-brand{display:flex;align-items:baseline;gap:2px;font-size:20px;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--text-3);line-height:1.8;max-width:320px;margin:0;}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:18px;letter-spacing:.04em;}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:14.5px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--primary);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-3);align-items:flex-start;}
.footer-contact i{color:var(--primary);opacity:.8;margin-top:4px;}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;
  align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);
}

/* ============ 动画 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:40px;}
  .rel-grid{gap:20px;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;padding-top:44px;}
  .article-side{position:static;margin-top:44px;}
  .side-mobile-toggle{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
    padding:16px 18px;color:var(--text);font-size:15px;font-weight:600;cursor:pointer;
  }
  .side-collapse{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
  .side-collapse.open{max-height:640px;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-panel{grid-template-columns:1fr;padding:38px 28px;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;padding:48px 0 34px;}
  .section{padding-top:74px;}
  .cta-panel{margin-top:74px;}
  .site-footer{margin-top:80px;}
}
@media (max-width:767px){
  .shell{padding:0 18px;}
  .rel-grid{grid-template-columns:1fr;}
  .article-hero h1{font-size:26px;}
  .article-body{font-size:16px;}
  .article-body h2{margin-top:38px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .article-foot{padding:18px;}
  .section{padding-top:60px;}
}
@media (max-width:519px){
  .header-inner{gap:14px;}
  .brand-text{font-size:18px;}
  .header-actions .btn-neo{display:none;}
  .cta-actions .btn-neo{width:100%;}
  .article-body{font-size:15.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg:#0B0E11;
  --bg-2:#12161B;
  --panel:#14181D;
  --panel-2:#171C22;
  --brand:#2EE6A8;
  --brand-deep:#17B384;
  --amber:#FFB545;
  --violet:#8A6BFF;
  --text:#E6ECF2;
  --text-2:#9AA6B2;
  --text-3:#6B7683;
  --line:rgba(255,255,255,.08);
  --glow:0 0 24px rgba(46,230,168,.35);
  --r-s:10px;
  --r:14px;
  --r-l:18px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --sp-section:112px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}

.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1050;
  background:rgba(11,14,17,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,0) 70%);
  opacity:.75;
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:28px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:21px;
  white-space:nowrap;
}
.logo-mark{
  width:12px;height:12px;border-radius:3px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
  flex:none;
}
.brand-latin{font-family:var(--mono);font-weight:500;color:var(--brand);letter-spacing:.04em;}
.brand-cn{font-weight:700;color:var(--text);}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link.active{
  color:var(--brand);
  text-shadow:0 0 12px rgba(46,230,168,.45);
  background:rgba(46,230,168,.07);
}
.nav-link.active::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:var(--glow);
  animation:breath 2.4s ease-in-out infinite;
}
@keyframes breath{
  0%,100%{opacity:.55;}
  50%{opacity:1;}
}
.header-cta{margin-left:8px;flex:none;}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-s);
  background:rgba(255,255,255,.02);
  padding:0;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--text);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-s);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:#06120D;}
.btn-primary:hover{background:#4AF0B8;color:#06120D;box-shadow:var(--glow);transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--text);border-color:rgba(255,255,255,.18);}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:rgba(46,230,168,.06);transform:translateY(-2px);}
.btn-amber{background:var(--amber);color:#1A1204;}
.btn-amber:hover{background:#FFC766;color:#1A1204;box-shadow:0 0 24px rgba(255,181,69,.3);transform:translateY(-2px);}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:15px;font-weight:500;
  border:0;background:none;padding:0;
}
.btn-link i{transition:transform .2s var(--ease);}
.btn-link:hover i{transform:translateX(4px);}

/* ============ 窄幅 Hero ============ */
.hero-cat{
  position:relative;
  padding:132px 0 56px;
  overflow:hidden;
  background:
    linear-gradient(180deg,rgba(11,14,17,.78) 0%,rgba(11,14,17,.93) 62%,var(--bg) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.hero-cat::before{
  content:"";
  position:absolute;inset:0;
  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;
  mask-image:radial-gradient(ellipse at 30% 40%,#000 10%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 40%,#000 10%,transparent 72%);
  pointer-events:none;
}
.hero-cat .shell{position:relative;z-index:2;max-width:980px;}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb-line a{color:var(--text-2);}
.breadcrumb-line a:hover{color:var(--brand);}
.breadcrumb-line i{font-size:10px;color:var(--text-3);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;
  border-radius:999px;
  border:1px solid rgba(46,230,168,.32);
  background:rgba(46,230,168,.09);
  color:var(--brand);
  font-size:13px;
  font-weight:500;
  letter-spacing:.04em;
  margin-bottom:20px;
}
.hero-cat h1{
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.2;
  margin-bottom:18px;
}
.hero-cat h1 em{
  font-style:normal;
  color:var(--brand);
  text-shadow:0 0 26px rgba(46,230,168,.35);
}
.hero-lead{
  font-size:clamp(16px,1.5vw,18px);
  color:var(--text-2);
  font-weight:300;
  max-width:720px;
}
.anchor-bar{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:34px;
}
.anchor-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(20,24,29,.72);
  font-size:14px;
  color:var(--text-2);
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.anchor-chip:hover{border-color:rgba(46,230,168,.4);color:var(--brand);transform:translateY(-2px);}
.anchor-chip i{color:var(--brand);font-size:12px;}

/* ============ 板块通用 ============ */
.section{padding:var(--sp-section) 0;}
.section-alt{background:linear-gradient(180deg,var(--bg) 0%,#0D1114 40%,var(--bg) 100%);}
.section-head{max-width:760px;margin-bottom:52px;}
.section-kicker{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--brand);
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(24px,3vw,38px);
  margin-bottom:16px;
}
.section-head p{color:var(--text-2);font-size:16px;font-weight:300;}

/* ============ 图文交错 ============ */
.zz-item{margin-bottom:88px;}
.zz-item:last-child{margin-bottom:0;}
.zz-media{
  position:relative;
  margin:0;
  border-radius:var(--r-l);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:var(--panel);
}
.zz-media img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease);}
.zz-media:hover img{transform:scale(1.03);}
.zz-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,17,0) 45%,rgba(11,14,17,.55) 100%);
  pointer-events:none;
}
.zz-index{
  font-family:var(--mono);
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.14em;
  margin-bottom:14px;
  display:block;
}
.zz-body h3{
  font-size:clamp(20px,2.2vw,26px);
  margin-bottom:16px;
}
.zz-body p{color:var(--text-2);font-weight:300;margin-bottom:18px;}
.zz-points{display:grid;gap:12px;margin-bottom:24px;}
.zz-points li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  color:var(--text);
}
.zz-points li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 12px rgba(46,230,168,.5);
}
.zz-points li span{color:var(--text-2);font-weight:300;}

/* ============ 要点清单 ============ */
.check-wrap{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:24px;
  padding:clamp(28px,4vw,56px);
}
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px 32px;
}
.check-item{
  display:flex;
  gap:16px;
  padding:20px;
  border-radius:var(--r);
  border:1px solid var(--line);
  background:var(--panel);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.check-item:hover{
  transform:translateY(-2px);
  border-color:rgba(46,230,168,.32);
  box-shadow:0 14px 38px rgba(0,0,0,.4);
}
.check-icon{
  flex:none;
  width:34px;height:34px;
  border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,230,168,.12);
  color:var(--brand);
  font-size:14px;
}
.check-item h3{font-size:16px;margin-bottom:6px;}
.check-item p{font-size:14px;color:var(--text-2);font-weight:300;line-height:1.7;}

/* ============ 提示卡 ============ */
.tip-card{
  height:100%;
  padding:32px;
  border-radius:var(--r-l);
  border:1px solid var(--line);
  background:var(--panel);
  box-shadow:var(--shadow);
  display:flex;
  flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.tip-card:hover{transform:translateY(-2px);border-color:rgba(255,181,69,.3);}
.tip-card .tip-tag{
  display:inline-flex;align-items:center;align-self:flex-start;
  height:26px;padding:0 12px;
  border-radius:999px;
  font-size:12px;
  background:rgba(255,181,69,.12);
  color:var(--amber);
  margin-bottom:18px;
}
.tip-card h3{font-size:19px;margin-bottom:12px;}
.tip-card p{font-size:14.5px;color:var(--text-2);font-weight:300;}
.tip-card.feature{
  background:linear-gradient(150deg,rgba(46,230,168,.09) 0%,rgba(20,24,29,.96) 55%);
  border-color:rgba(46,230,168,.24);
}
.tip-card.feature .tip-tag{background:rgba(46,230,168,.14);color:var(--brand);}

/* ============ FAQ ============ */
.faq-list .accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
}
.faq-list .accordion-button{
  position:relative;
  background:transparent;
  color:var(--text);
  font-size:16.5px;
  font-weight:500;
  padding:22px 46px 22px 0;
  box-shadow:none;
  border-radius:0;
}
.faq-list .accordion-button::after{
  position:absolute;
  right:8px;
  margin:0;
  background-image:none;
  content:"\002B";
  font-family:var(--mono);
  font-size:20px;
  width:auto;height:auto;
  color:var(--brand);
  transform:none;
  transition:transform .25s var(--ease);
  line-height:1;
}
.faq-list .accordion-button:not(.collapsed){color:var(--brand);}
.faq-list .accordion-button:not(.collapsed)::after{
  content:"\2212";
  transform:rotate(180deg);
}
.faq-list .accordion-button:focus{box-shadow:none;outline:none;}
.faq-list .accordion-button:hover{color:var(--brand);}
.faq-list .accordion-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:2px;
  background:var(--brand);
  box-shadow:var(--glow);
  opacity:0;
  transition:opacity .25s var(--ease);
}
.faq-list .accordion-item{position:relative;}
.faq-list .accordion-item:has(.accordion-button:not(.collapsed))::before{opacity:1;}
.faq-list .accordion-body{
  padding:0 46px 24px 0;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  font-weight:300;
}

/* ============ CTA ============ */
.cta-panel{
  position:relative;
  overflow:hidden;
  border-radius:26px;
  border:1px solid rgba(46,230,168,.22);
  background:
    linear-gradient(120deg,rgba(46,230,168,.1) 0%,rgba(20,24,29,.98) 48%,rgba(138,107,255,.08) 100%),
    url('/assets/images/backpic/back-3.png') right center/cover no-repeat;
  padding:clamp(32px,5vw,64px);
}
.cta-panel::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,14,17,.94) 0%,rgba(11,14,17,.72) 55%,rgba(11,14,17,.4) 100%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;max-width:640px;}
.cta-panel h2{font-size:clamp(24px,3vw,36px);margin-bottom:16px;}
.cta-panel p{color:var(--text-2);font-weight:300;margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.cta-notes{display:grid;gap:10px;}
.cta-notes li{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-2);
}
.cta-notes i{color:var(--brand);font-size:12px;}

/* ============ 页脚 ============ */
.site-footer{
  background:#0A0C0F;
  border-top:1px solid var(--line);
  position:relative;
  padding-top:72px;
}
.site-footer::before{
  content:"";
  position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,0) 65%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:9px;
  font-size:20px;margin-bottom:16px;
}
.brand-dot{
  width:11px;height:11px;border-radius:3px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
  flex:none;
}
.footer-desc{
  font-size:14px;
  color:var(--text-2);
  font-weight:300;
  line-height:1.85;
  max-width:340px;
}
.site-footer h4{
  font-size:14px;
  color:var(--text);
  letter-spacing:.08em;
  margin-bottom:20px;
}
.site-footer ul{display:grid;gap:12px;}
.site-footer ul a{
  font-size:14px;
  color:var(--text-2);
  font-weight:300;
}
.site-footer ul a:hover{color:var(--brand);}
.footer-contact li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text-2);font-weight:300;
}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:12px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding:22px 0 30px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--sp-section:88px;}
}
@media (max-width:991px){
  :root{--sp-section:72px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    inset:68px 0 0 0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px;
    margin:0;
    background:rgba(8,10,13,.97);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transform:translateX(100%);
    opacity:0;
    visibility:hidden;
    transition:transform .3s var(--ease),opacity .3s var(--ease),visibility .3s;
    overflow-y:auto;
  }
  body.nav-open .main-nav{transform:translateX(0);opacity:1;visibility:visible;}
  .nav-link{
    display:flex;
    align-items:center;
    height:56px;
    padding:0 16px;
    font-size:16px;
    border-radius:10px;
    border-bottom:1px solid var(--line);
  }
  .nav-link.active{background:transparent;}
  .nav-link.active::after{
    left:0;top:12px;bottom:12px;right:auto;
    width:3px;height:auto;
    border-radius:3px;
  }
  .nav-link.active{box-shadow:inset 8px 0 0 -5px rgba(46,230,168,.18);}
  .header-cta{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .footer-desc{max-width:none;}
  .zz-item{margin-bottom:64px;}
  .check-grid{grid-template-columns:1fr;}
}
@media (max-width:767px){
  .shell{padding:0 18px;}
  .hero-cat{padding:112px 0 44px;}
  .hero-cat .shell{max-width:100%;}
  .anchor-bar{gap:8px;}
  .anchor-chip{height:36px;padding:0 14px;font-size:13px;}
  .zz-media img{aspect-ratio:4/3;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575px){
  .logo{font-size:18px;}
  .hero-cat h1{font-size:clamp(26px,7vw,34px);}
  .section-head{margin-bottom:36px;}
  .check-wrap{padding:22px 18px;border-radius:18px;}
  .tip-card{padding:24px;}
  .faq-list .accordion-button{font-size:15.5px;padding:18px 40px 18px 0;}
  .faq-list .accordion-body{padding:0 0 20px 0;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg:#0B0E11;
  --panel:#12161B;
  --panel-up:#171C22;
  --card:#14181D;
  --brand:#2EE6A8;
  --brand-deep:#17B384;
  --amber:#FFB545;
  --violet:#8A6BFF;
  --text:#E6ECF2;
  --muted:#9AA6B2;
  --dim:#6B7683;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glow:0 0 24px rgba(46,230,168,.35);
  --r-sm:10px;
  --r-md:12px;
  --r-card:14px;
  --r-lg:18px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sec:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.28}
p{margin:0 0 18px}
ul,ol{margin:0 0 18px;padding-left:20px}
li{margin-bottom:8px}
button{font-family:inherit}
.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn-neon,.btn-ghost,.btn-amber{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:500;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);white-space:nowrap;
}
.btn-neon{background:var(--brand);color:#06120D;border-color:var(--brand)}
.btn-neon:hover{background:#4bf0b8;box-shadow:var(--glow);transform:translateY(-1px);color:#06120D}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(46,230,168,.06)}
.btn-amber{background:transparent;color:var(--amber);border-color:rgba(255,181,69,.42)}
.btn-amber:hover{background:rgba(255,181,69,.12);border-color:var(--amber)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:500}
.link-more:hover{color:#6ff2c6;gap:10px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:1035;height:68px;
  background:rgba(11,14,17,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,.25) 38%,rgba(46,230,168,0) 78%);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:inline-flex;align-items:baseline;gap:2px;font-size:21px;line-height:1}
.brand-dot{
  width:9px;height:9px;border-radius:50%;background:var(--brand);
  box-shadow:var(--glow);margin-right:9px;align-self:center;flex:0 0 auto;
}
.brand-latin{font-family:var(--mono);font-weight:500;letter-spacing:.02em;color:var(--text)}
.brand-cn{font-weight:700;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:68px;
  padding:0 14px;font-size:15px;color:var(--muted);font-weight:400;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;
  background:var(--brand);border-radius:2px;opacity:0;transform:scaleX(.4);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--brand);text-shadow:0 0 14px rgba(46,230,168,.45);font-weight:500}
.nav-link.active::after{opacity:1;transform:scaleX(1);animation:breathe 2.4s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:.65}50%{opacity:1}}
.header-actions{display:flex;align-items:center;gap:12px}
.burger{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  background:transparent;border:1px solid var(--line-strong);color:var(--text);
  font-size:17px;align-items:center;justify-content:center;cursor:pointer;
}
.burger:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:1060;background:rgba(10,12,15,.98);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  transform:translateX(102%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;padding:20px 22px 32px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:48px;margin-bottom:18px}
.drawer-close{
  width:42px;height:42px;border-radius:var(--r-sm);background:transparent;
  border:1px solid var(--line-strong);color:var(--text);font-size:18px;cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-nav a{
  display:flex;align-items:center;height:56px;padding-left:16px;
  font-size:16px;color:var(--muted);border-bottom:1px solid var(--line);position:relative;
}
.drawer-nav a.active{color:var(--brand);font-weight:500}
.drawer-nav a.active::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  border-radius:3px;background:var(--brand);box-shadow:var(--glow);
}
.drawer-nav a:hover{color:var(--text)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.drawer-foot .btn-neon{width:100%}
.drawer-note{font-size:13px;color:var(--dim);text-align:center}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--dim);margin-bottom:22px;
}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:rgba(255,255,255,.18)}
.crumbs .current{color:var(--text)}

/* ---------- 页面 Hero（窄幅） ---------- */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  padding:56px 0 48px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(115deg,rgba(11,14,17,.96) 0%,rgba(11,14,17,.86) 46%,rgba(11,14,17,.62) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
  opacity:.85;
}
.page-hero::after{
  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:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse at 70% 20%,#000 0%,transparent 72%);
  mask-image:radial-gradient(ellipse at 70% 20%,#000 0%,transparent 72%);
}
.page-hero .shell{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);background:rgba(46,230,168,.1);
  border:1px solid rgba(46,230,168,.24);border-radius:999px;
  padding:6px 14px;margin-bottom:18px;font-family:var(--mono);
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  font-weight:700;max-width:22ch;margin-bottom:16px;
}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;color:var(--muted);max-width:52ch;margin-bottom:26px}
.anchor-bar{display:flex;flex-wrap:wrap;gap:10px}
.anchor-bar a{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border:1px solid var(--line-strong);border-radius:999px;
  font-size:14px;color:var(--muted);background:rgba(18,22,27,.6);
}
.anchor-bar a:hover{border-color:rgba(46,230,168,.5);color:var(--brand);background:rgba(46,230,168,.08)}

/* ---------- 布局 ---------- */
.layout{
  display:grid;grid-template-columns:264px minmax(0,1fr);
  gap:56px;padding:64px 0 96px;align-items:start;
}
.toc{position:sticky;top:96px}
.toc-card{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px 20px;box-shadow:var(--shadow);
}
.toc-title{
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);font-family:var(--mono);margin-bottom:14px;
}
.toc-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:18px}
.toc-link{
  position:relative;display:block;padding:9px 12px 9px 16px;
  font-size:14px;color:var(--muted);border-radius:8px;
}
.toc-link::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;
  background:var(--brand);border-radius:2px;
  opacity:0;transform:scaleY(.4);transition:all .22s var(--ease);
}
.toc-link:hover{color:var(--text);background:rgba(255,255,255,.03)}
.toc-link.active{color:var(--brand);background:rgba(46,230,168,.07)}
.toc-link.active::before{opacity:1;transform:scaleY(1);box-shadow:var(--glow)}
.toc-tip{
  border-top:1px solid var(--line);padding-top:16px;
  font-size:13px;color:var(--dim);line-height:1.7;
}
.toc-tip strong{color:var(--amber);font-weight:500}

/* ---------- 内容区 ---------- */
.content{min-width:0}
.doc-section{padding-bottom:56px;margin-bottom:56px;border-bottom:1px solid var(--line)}
.doc-section:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:16px}
.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:22px}
.section-index{
  font-family:var(--mono);font-size:14px;color:var(--brand);
  letter-spacing:.06em;flex:0 0 auto;
}
.doc-section h2{
  font-size:clamp(22px,2.4vw,32px);
  position:relative;padding-left:0;
}
.doc-section h3{
  font-size:20px;font-weight:500;margin:34px 0 14px;color:var(--text);
  display:flex;align-items:center;gap:10px;
}
.doc-section h3::before{
  content:"";width:3px;height:18px;border-radius:2px;
  background:var(--brand);flex:0 0 auto;box-shadow:0 0 12px rgba(46,230,168,.5);
}
.doc-section p{color:var(--muted);font-size:16px}
.doc-section p strong{color:var(--text);font-weight:500}

/* 等级卡（非对称） */
.level-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px;margin:30px 0 8px}
.level-card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--shadow);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.level-card:hover{transform:translateY(-2px);border-color:rgba(46,230,168,.3)}
.level-card.feature{border-color:rgba(46,230,168,.45);box-shadow:var(--shadow),0 0 34px rgba(46,230,168,.14)}
.level-card .tag{
  position:absolute;top:20px;right:20px;
  font-size:12px;color:var(--amber);background:rgba(255,181,69,.12);
  border-radius:999px;padding:4px 12px;font-family:var(--mono);
}
.level-num{
  font-family:var(--mono);font-size:56px;line-height:1;
  font-weight:700;color:transparent;
  -webkit-text-stroke:1px rgba(46,230,168,.6);margin-bottom:14px;letter-spacing:-.02em;
}
.level-card.feature .level-num{-webkit-text-stroke:1px var(--brand);text-shadow:0 0 26px rgba(46,230,168,.25)}
.level-card h3{font-size:19px;margin:0 0 14px;color:var(--text);display:block}
.level-card h3::before{display:none}
.level-list{list-style:none;padding:0;margin:0 0 20px}
.level-list li{
  position:relative;padding-left:22px;font-size:14px;color:var(--muted);margin-bottom:9px;line-height:1.7;
}
.level-list li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(46,230,168,.6);
}
.level-card.feature .level-list li::before{background:var(--brand)}
.level-card:not(.feature) .level-list li::before{background:var(--dim);box-shadow:none}

/* 对照列表 */
.diff-table{
  border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;margin:26px 0 8px;background:var(--card);
}
.diff-head{
  display:grid;grid-template-columns:1.1fr 1fr 1fr 1fr;gap:0;
  background:rgba(255,255,255,.03);
  border-bottom:1px solid var(--line);
}
.diff-head span{
  padding:16px 18px;font-size:13px;color:var(--dim);
  font-family:var(--mono);letter-spacing:.04em;
}
.diff-head span:first-child{color:var(--muted)}
.diff-row{
  display:grid;grid-template-columns:1.1fr 1fr 1fr 1fr;
  border-bottom:1px solid var(--line);position:relative;
  transition:background-color .2s var(--ease);
}
.diff-row:last-child{border-bottom:0}
.diff-row::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  background:var(--brand);border-radius:3px;opacity:0;transition:opacity .2s var(--ease);
}
.diff-row:hover{background:rgba(255,255,255,.03)}
.diff-row:hover::before{opacity:1}
.diff-row:nth-child(even){background:rgba(255,255,255,.02)}
.diff-row > *{padding:17px 18px;font-size:14px;color:var(--muted);line-height:1.6}
.diff-label{color:var(--text);font-weight:500}
.diff-cell.yes{color:var(--brand)}
.diff-cell.mid{color:var(--amber)}
.diff-cell.no{color:var(--dim)}

/* 步骤 */
.steps{list-style:none;padding:0;margin:26px 0 8px;counter-reset:step}
.steps li{
  position:relative;padding:0 0 24px 62px;counter-increment:step;margin-bottom:0;
}
.steps li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--mono);font-size:15px;color:var(--brand);
  width:42px;height:42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,230,168,.08);border:1px solid rgba(46,230,168,.24);
}
.steps li::after{
  content:"";position:absolute;left:20px;top:46px;bottom:6px;width:1px;
  background:linear-gradient(180deg,rgba(46,230,168,.4),rgba(46,230,168,0));
}
.steps li:last-child{padding-bottom:0}
.steps li:last-child::after{display:none}
.steps h4{font-size:16px;margin-bottom:6px;color:var(--text);font-weight:500}
.steps p{font-size:14px;color:var(--muted);margin:0}

/* 提示卡 */
.tip-card{
  display:flex;gap:16px;align-items:flex-start;
  background:linear-gradient(135deg,rgba(46,230,168,.09),rgba(46,230,168,.02));
  border:1px solid rgba(46,230,168,.22);
  border-left:3px solid var(--brand);
  border-radius:var(--r-md);padding:18px 20px;margin:26px 0;
}
.tip-card i{color:var(--brand);font-size:17px;margin-top:4px}
.tip-card p{margin:0;font-size:14px;color:var(--muted);line-height:1.75}
.tip-card p strong{color:var(--text);font-weight:500}
.tip-card.amber{
  background:linear-gradient(135deg,rgba(255,181,69,.1),rgba(255,181,69,.02));
  border-color:rgba(255,181,69,.26);border-left-color:var(--amber);
}
.tip-card.amber i{color:var(--amber)}

/* 图文块 */
.figure-block{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  margin:28px 0 8px;background:var(--card);
}
.figure-block img{width:100%;aspect-ratio:16/7;object-fit:cover;opacity:.92}
.figure-block figcaption{
  padding:14px 18px;font-size:13px;color:var(--dim);
  border-top:1px solid var(--line);
}

/* 迷你指标 */
.mini-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;margin:26px 0;
}
.mini-stats div{background:var(--panel);padding:20px 18px}
.mini-stats .num{
  font-family:var(--mono);font-size:26px;color:var(--brand);
  line-height:1.2;letter-spacing:-.01em;
}
.mini-stats .cap{font-size:13px;color:var(--dim);margin-top:4px}

/* FAQ */
.faq-wrap{margin-top:6px}
.acc{--bs-accordion-bg:transparent;background:transparent}
.acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.acc .accordion-item:first-of-type{border-top:1px solid var(--line)}
.acc .accordion-button{
  position:relative;background:transparent;color:var(--text);
  font-size:16px;font-weight:500;padding:22px 52px 22px 18px;
  box-shadow:none;border-radius:0;line-height:1.6;
}
.acc .accordion-button::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:2px;
  border-radius:2px;background:var(--brand);opacity:0;
  transition:opacity .22s var(--ease);
}
.acc .accordion-button:not(.collapsed){
  color:var(--brand);background:rgba(46,230,168,.05);box-shadow:none;
}
.acc .accordion-button:not(.collapsed)::before{opacity:1;box-shadow:var(--glow)}
.acc .accordion-button:focus{box-shadow:none;border-color:transparent}
.acc .accordion-button::after{
  content:"+";background-image:none;font-family:var(--mono);font-size:20px;
  width:auto;height:auto;line-height:1;color:var(--brand);
  transform:none;transition:transform .25s var(--ease);
  display:flex;align-items:center;justify-content:center;
}
.acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--brand)}
.acc .accordion-body{
  padding:0 46px 24px 18px;font-size:15px;color:var(--muted);line-height:1.85;
  background:transparent;
}

/* 相关入口 */
.related{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:22px;margin-top:26px}
.related-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.related-card:hover{transform:translateY(-2px);border-color:rgba(46,230,168,.3)}
.related-media{overflow:hidden;position:relative}
.related-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.related-card:hover .related-media img{transform:scale(1.03)}
.related-card.big .related-media img{aspect-ratio:16/9}
.related-card:not(.big) .related-media img{aspect-ratio:4/3}
.related-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.related-body .badge-line{
  font-size:12px;color:var(--brand);background:rgba(46,230,168,.1);
  border-radius:999px;padding:3px 11px;align-self:flex-start;font-family:var(--mono);
}
.related-body h3{font-size:17px;font-weight:500;margin:0;color:var(--text)}
.related-body p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
.related-body .link-more{margin-top:auto;padding-top:6px}

/* CTA */
.cta-panel{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#10151A 0%,#0B0E11 62%);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:44px 42px;margin-top:16px;box-shadow:var(--shadow);
}
.cta-panel::before{
  content:"";position:absolute;top:-120px;right:-80px;width:320px;height:320px;
  border-radius:50%;background:radial-gradient(circle,rgba(46,230,168,.22),transparent 68%);
}
.cta-panel::after{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,0));
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.cta-panel h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:14px}
.cta-panel p{color:var(--muted);font-size:15px;max-width:46ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.service-notes{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px}
.service-notes li{
  display:flex;gap:12px;align-items:flex-start;margin:0;
  font-size:14px;color:var(--muted);line-height:1.7;
}
.service-notes i{color:var(--amber);margin-top:5px}
.back-row{
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;
  margin-top:30px;padding-top:22px;border-top:1px solid var(--line);
  font-size:14px;color:var(--dim);
}
.back-row a{color:var(--muted)}
.back-row a:hover{color:var(--brand)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0A0C0F;border-top:1px solid var(--line);
  margin-top:24px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(46,230,168,.7),rgba(46,230,168,.12) 42%,rgba(46,230,168,0) 82%);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;padding:66px 0 44px;
}
.footer-brand{display:inline-flex;align-items:baseline;font-size:20px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--dim);line-height:1.8;max-width:34ch;margin:0}
.footer-col h4{
  font-size:14px;font-weight:500;color:var(--text);
  letter-spacing:.06em;margin-bottom:18px;
}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--muted);line-height:1.6}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--dim);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(18,22,27,.9);border:1px solid var(--line-strong);
  color:var(--muted);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .25s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--brand);border-color:var(--brand);box-shadow:var(--glow)}

/* 滚动淡入 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  :root{--sec:96px}
  .layout{gap:40px;grid-template-columns:230px minmax(0,1fr)}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
  .footer-grid .footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:991.98px){
  .main-nav{display:none}
  .burger{display:inline-flex}
  .header-actions .btn-neon{display:none}
  .layout{grid-template-columns:1fr;gap:32px;padding:44px 0 72px}
  .toc{position:static}
  .toc-card{padding:18px}
  .toc-nav{flex-direction:row;flex-wrap:wrap;gap:8px;margin-bottom:12px}
  .toc-link{
    padding:8px 14px;border:1px solid var(--line);border-radius:999px;
    font-size:13px;background:var(--panel-up);
  }
  .toc-link::before{display:none}
  .toc-link.active{border-color:rgba(46,230,168,.45)}
  .toc-tip{border-top:0;padding-top:10px;font-size:12px}
  .level-grid{grid-template-columns:1fr 1fr}
  .level-grid .level-card.feature{grid-column:1 / -1}
  .related{grid-template-columns:1fr 1fr}
  .related-card.big{grid-column:1 / -1}
  .cta-inner{grid-template-columns:1fr;gap:30px}
  .page-hero{padding:40px 0 36px}
}
@media (max-width:767.98px){
  .site-header,.header-inner{height:62px}
  .brand{font-size:19px}
  .page-hero h1{max-width:100%}
  .hero-sub{font-size:15px}
  .doc-section{padding-bottom:40px;margin-bottom:40px}
  .doc-section h3{margin-top:28px}
  .level-grid{grid-template-columns:1fr}
  .mini-stats{grid-template-columns:1fr}
  .diff-head{display:none}
  .diff-table{border:0;background:transparent;border-radius:0;overflow:visible}
  .diff-row{
    display:block;border:1px solid var(--line);border-radius:var(--r-md);
    background:var(--card) !important;margin-bottom:12px;padding:6px 0;
  }
  .diff-row::before{display:none}
  .diff-row > *{padding:9px 16px;font-size:14px}
  .diff-label{font-size:15px;color:var(--brand);font-weight:500;padding-bottom:4px}
  .diff-cell::before{
    content:attr(data-label) "：";color:var(--dim);font-size:13px;
    display:inline-block;min-width:74px;
  }
  .related{grid-template-columns:1fr}
  .cta-panel{padding:32px 22px}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding:48px 0 34px}
  .footer-grid .footer-col:last-child{grid-column:auto}
  .footer-bottom{font-size:12px}
  .anchor-bar a{height:34px;font-size:13px;padding:0 13px}
}
@media (max-width:520px){
  .shell{padding:0 18px}
  .page-hero h1{font-size:27px}
  .level-num{font-size:44px}
  .acc .accordion-button{font-size:15px;padding:18px 44px 18px 14px}
  .acc .accordion-body{padding:0 30px 20px 14px;font-size:14px}
  .steps li{padding-left:54px}
  .steps li::before{width:38px;height:38px;font-size:14px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --bg:#0B0E11;
  --panel:#12161B;
  --raise:#171C22;
  --card:#14181D;
  --brand:#2EE6A8;
  --brand-d:#17B384;
  --amber:#FFB545;
  --purple:#8A6BFF;
  --text:#E6ECF2;
  --muted:#9AA6B2;
  --dim:#6B7683;
  --line:rgba(255,255,255,.08);
  --glow:0 0 24px rgba(46,230,168,.35);
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.75;font-weight:400;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--text);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.28}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0}
::selection{background:rgba(46,230,168,.28)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px
}
.shell{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section-sm{padding:72px 0}
@media (max-width:991px){.section{padding:76px 0}.section-sm{padding:56px 0}}
@media (max-width:575px){.section{padding:56px 0}.shell{padding:0 18px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(11,14,17,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(46,230,168,.18) 42%,rgba(46,230,168,0) 100%);
}
.header-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-dot{
  width:12px;height:12px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-d));
  box-shadow:var(--glow);position:relative;flex:0 0 auto;
}
.brand-dot::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:1px solid rgba(46,230,168,.28)
}
.brand-latin{font-family:var(--mono);font-size:20px;font-weight:700;letter-spacing:.04em;color:var(--text)}
.brand-cn{font-size:20px;font-weight:700;color:var(--text);margin-left:2px}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--muted);border-radius:8px
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-link.active{color:var(--brand);text-shadow:0 0 14px rgba(46,230,168,.45)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:var(--glow);
  animation:pulse 2.4s infinite ease-in-out;
}
@keyframes pulse{0%,100%{opacity:.55}50%{opacity:1}}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.btn-neon{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#06120D;font-weight:700;font-size:15px;
  padding:11px 20px;border-radius:10px;border:1px solid var(--brand);
  transition:all .2s var(--ease);white-space:nowrap;
}
.btn-neon:hover{background:#4df3bd;color:#06120D;box-shadow:var(--glow);transform:translateY(-1px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:var(--text);font-weight:500;font-size:15px;
  padding:11px 20px;border-radius:10px;border:1px solid var(--line);
  transition:all .2s var(--ease);
}
.btn-ghost:hover{border-color:rgba(46,230,168,.6);color:var(--brand);background:rgba(46,230,168,.06)}
.btn-text{color:var(--brand);font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover{gap:10px;color:#4df3bd}
.nav-toggle{
  display:none;background:transparent;border:1px solid var(--line);color:var(--text);
  width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center
}
.nav-toggle:hover{border-color:rgba(46,230,168,.6);color:var(--brand)}
@media (max-width:991px){
  .main-nav,.header-actions .btn-neon{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{justify-content:space-between}
}
.drawer{
  position:fixed;inset:0;z-index:200;background:rgba(9,11,14,.97);
  backdrop-filter:blur(14px);padding:84px 22px 32px;
  transform:translateY(-100%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;overflow-y:auto;
}
.drawer.open{transform:translateY(0)}
.drawer-close{
  position:absolute;top:16px;right:20px;width:42px;height:42px;border-radius:10px;
  background:transparent;border:1px solid var(--line);color:var(--text)
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer .brand{margin-bottom:26px}
.drawer-nav .nav-link{
  display:block;line-height:56px;font-size:17px;padding:0 0 0 14px;border-bottom:1px solid var(--line);
  border-radius:0;color:var(--text);
}
.drawer-nav .nav-link.active{color:var(--brand)}
.drawer-nav .nav-link.active::after{display:none}
.drawer-nav .nav-link.active::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:2px;
  background:var(--brand);box-shadow:var(--glow);
}
.drawer-cta{margin-top:28px;display:grid;gap:12px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;padding:96px 0 84px;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(11,14,17,.96) 38%,rgba(11,14,17,.72) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  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;
  mask-image:radial-gradient(ellipse at 70% 30%,#000 10%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 70% 30%,#000 10%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.crumb{font-size:13px;color:var(--dim);margin-bottom:20px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb span.sep{color:var(--dim)}
.crumb .now{color:var(--brand)}
.tag-line{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);
  background:rgba(46,230,168,.12);border:1px solid rgba(46,230,168,.24);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.page-hero h1{font-size:clamp(30px,4.2vw,50px);margin-bottom:18px}
.page-hero h1 .accent{color:var(--brand)}
.hero-sub{font-size:17px;color:var(--muted);max-width:620px;margin-bottom:26px}
.anchor-bar{display:flex;flex-wrap:wrap;gap:10px}
.anchor-bar a{
  font-size:14px;color:var(--muted);border:1px solid var(--line);border-radius:999px;
  padding:8px 16px;background:rgba(255,255,255,.02)
}
.anchor-bar a:hover{color:var(--brand);border-color:rgba(46,230,168,.5);background:rgba(46,230,168,.06)}
.hero-card{
  background:linear-gradient(180deg,rgba(23,28,34,.96),rgba(18,22,27,.96));
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);
}
.hero-card h2{font-size:17px;font-weight:500;color:var(--muted);margin-bottom:18px;letter-spacing:.04em}
.mini-step{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.07)}
.mini-step:last-child{border-bottom:0;padding-bottom:0}
.mini-step .n{font-family:var(--mono);font-size:14px;color:var(--brand);flex:0 0 auto;padding-top:2px}
.mini-step .t{font-size:15px;color:var(--text)}
.mini-step .t small{display:block;color:var(--dim);font-size:13px;margin-top:2px}
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .page-hero{padding:70px 0 60px}
}

/* ---------- section head ---------- */
.section-head{margin-bottom:44px;max-width:760px}
.section-head .eyebrow{
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);display:block;margin-bottom:12px
}
.section-head h2{font-size:clamp(23px,2.6vw,36px);margin-bottom:14px}
.section-head p{color:var(--muted);margin:0}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- steps timeline ---------- */
.step-list{list-style:none;position:relative}
.step-list::before{
  content:"";position:absolute;left:37px;top:14px;bottom:24px;width:1px;
  background:linear-gradient(180deg,rgba(46,230,168,.55),rgba(46,230,168,.16) 60%,rgba(255,255,255,.05));
}
.step-item{position:relative;display:grid;grid-template-columns:76px 1fr;gap:26px;padding-bottom:46px}
.step-item:last-child{padding-bottom:0}
.step-num{
  width:76px;height:76px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--panel);border:1px solid var(--line);
  font-family:var(--mono);font-size:24px;font-weight:700;color:var(--brand);
}
.step-item:first-child .step-num{border-color:rgba(46,230,168,.5);box-shadow:var(--glow)}
.step-body{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;transition:all .2s var(--ease)}
.step-body:hover{transform:translateY(-2px);border-color:rgba(46,230,168,.3)}
.step-body h3{font-size:20px;margin-bottom:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.step-body p{color:var(--muted);margin-bottom:14px}
.step-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.chip{
  font-size:12.5px;border-radius:999px;padding:4px 12px;
  background:rgba(46,230,168,.12);color:var(--brand);border:1px solid rgba(46,230,168,.2)
}
.chip.amber{background:rgba(255,181,69,.12);color:var(--amber);border-color:rgba(255,181,69,.22)}
@media (max-width:767px){
  .step-list::before{left:27px}
  .step-item{grid-template-columns:56px 1fr;gap:16px}
  .step-num{width:56px;height:56px;font-size:18px}
  .step-body{padding:20px}
}

/* ---------- checklist / notes ---------- */
.split{display:grid;grid-template-columns:1.25fr .95fr;gap:40px;align-items:start}
@media (max-width:991px){.split{grid-template-columns:1fr;gap:28px}}
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;
}
.tick-list{list-style:none;display:grid;gap:14px}
.tick-list li{display:flex;gap:12px;font-size:15.5px;color:var(--muted);line-height:1.7}
.tick-list li i{color:var(--brand);font-size:14px;padding-top:5px;flex:0 0 auto}
.tick-list li strong{color:var(--text);font-weight:500}
.media-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow)
}
.media-card img{width:100%;height:210px;object-fit:cover;transition:transform .35s var(--ease)}
.media-card:hover img{transform:scale(1.03)}
.media-card .body{padding:22px 24px}
.media-card h3{font-size:18px;margin-bottom:10px}
.media-card p{color:var(--muted);font-size:14.5px;margin:0}

.note-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:32px}
@media (max-width:767px){.note-grid{grid-template-columns:1fr}}
.note-card{
  background:var(--raise);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  transition:all .2s var(--ease)
}
.note-card:hover{border-color:rgba(255,181,69,.4);transform:translateY(-2px)}
.note-card .ic{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,181,69,.12);color:var(--amber);margin-bottom:14px
}
.note-card h3{font-size:17px;margin-bottom:8px}
.note-card p{color:var(--muted);font-size:14.5px;margin:0}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-acc .accordion-button{
  background:transparent;color:var(--text);font-size:16.5px;font-weight:500;
  padding:22px 48px 22px 18px;box-shadow:none;border-radius:0;
}
.faq-acc .accordion-button:hover{color:var(--brand)}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .2s var(--ease)
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1;box-shadow:var(--glow)}
.faq-acc .accordion-button::after{
  background-image:none;content:"+";font-family:var(--mono);font-size:20px;color:var(--brand);
  width:24px;height:24px;display:flex;align-items:center;justify-content:center;
  transition:transform .25s var(--ease);transform:none
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq-acc .accordion-body{color:var(--muted);font-size:15px;line-height:1.85;padding:0 24px 24px 18px}

/* ---------- cta form ---------- */
.cta-panel{
  position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line);
  background:linear-gradient(140deg,#101a19 0%,#0d1116 55%,#0b0e11 100%);
  padding:52px;box-shadow:var(--shadow)
}
.cta-panel::after{
  content:"";position:absolute;width:420px;height:420px;right:-140px;top:-160px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,230,168,.22),transparent 68%);pointer-events:none
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:44px}
@media (max-width:991px){.cta-grid{grid-template-columns:1fr;gap:32px}.cta-panel{padding:32px}}
.cta-panel h2{font-size:clamp(22px,2.4vw,32px);margin-bottom:14px}
.cta-panel .lead{color:var(--muted);margin-bottom:22px}
.svc-list{list-style:none;display:grid;gap:12px}
.svc-list li{display:flex;gap:10px;font-size:14.5px;color:var(--muted)}
.svc-list li i{color:var(--brand);padding-top:4px;font-size:13px}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:7px}
.form-control,.form-select{
  width:100%;height:48px;background:var(--panel);border:1px solid var(--line);color:var(--text);
  border-radius:10px;padding:0 14px;font-size:15px;transition:all .18s var(--ease)
}
textarea.form-control{height:auto;min-height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-control:focus,.form-select:focus{
  background:var(--panel);color:var(--text);border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(46,230,168,.16);outline:none
}
.form-control::placeholder{color:var(--dim)}
.form-select option{background:var(--panel);color:var(--text)}
.form-note{font-size:12.5px;color:var(--dim);margin-top:10px}
.btn-submit{
  width:100%;height:50px;border:none;border-radius:10px;background:var(--brand);color:#06120D;
  font-weight:700;font-size:16px;transition:all .2s var(--ease)
}
.btn-submit:hover{background:#4df3bd;box-shadow:var(--glow)}

/* ---------- footer ---------- */
.site-footer{background:#0A0C0F;padding:70px 0 0;position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(46,230,168,.7),transparent)
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:575px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{color:var(--dim);font-size:14px;line-height:1.8;max-width:340px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text)}
.footer-col ul{list-style:none;display:grid;gap:11px}
.footer-col ul li a{font-size:14px;color:var(--muted)}
.footer-col ul li a:hover{color:var(--brand)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--muted);align-items:flex-start}
.footer-contact li i{color:var(--brand);padding-top:5px;font-size:13px}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--dim)
}
.footer-bottom a{color:var(--dim)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .nav-link.active::after{animation:none}
  *{scroll-behavior:auto !important}
}
html{scroll-behavior:smooth}

/* roulang page: category3 */
:root{
  --bg:#0B0E11;
  --panel:#12161B;
  --panel-2:#14181D;
  --panel-up:#171C22;
  --footer-bg:#0A0C0F;
  --brand:#2EE6A8;
  --brand-deep:#17B384;
  --amber:#FFB545;
  --violet:#8A6BFF;
  --text:#E6ECF2;
  --text-2:#9AA6B2;
  --text-3:#6B7683;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --glow:0 0 24px rgba(46,230,168,.35);
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --shell:1264px;
  --sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.02em;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px;}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
.section{padding:104px 0;}
.section-sm{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);background:rgba(46,230,168,.1);
  border:1px solid rgba(46,230,168,.24);
  padding:6px 12px;border-radius:999px;margin-bottom:18px;
}
.eyebrow.amber{color:var(--amber);background:rgba(255,181,69,.1);border-color:rgba(255,181,69,.24);}
h2.h-sec{font-size:clamp(24px,3vw,40px);margin-bottom:14px;}
.sec-sub{color:var(--text-2);font-size:16px;max-width:660px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(11,14,17,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,var(--brand) 0%,rgba(46,230,168,.35) 26%,rgba(46,230,168,0) 72%);
}
.header-inner{height:68px;display:flex;align-items:center;gap:28px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-dot{
  width:11px;height:11px;border-radius:3px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);flex-shrink:0;
}
.brand-latin{font-family:var(--mono);font-size:20px;font-weight:700;letter-spacing:.02em;}
.brand-cn{font-size:20px;font-weight:700;letter-spacing:.04em;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:68px;padding:0 14px;font-size:15px;color:var(--text-2);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:14px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);
  transition:transform .22s var(--ease);box-shadow:var(--glow);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);text-shadow:0 0 14px rgba(46,230,168,.45);}
.nav-link.active::after{transform:scaleX(1);animation:navBreath 2.4s ease-in-out infinite;}
@keyframes navBreath{
  0%,100%{opacity:.75;box-shadow:0 0 14px rgba(46,230,168,.28);}
  50%{opacity:1;box-shadow:0 0 26px rgba(46,230,168,.55);}
}
.nav-cta{
  margin-left:16px;display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--radius-sm);
  background:var(--brand);color:#06120D;font-weight:700;font-size:14px;
  border:1px solid transparent;transition:all .2s var(--ease);white-space:nowrap;
}
.nav-cta:hover{background:#48F0B6;color:#06120D;box-shadow:var(--glow);transform:translateY(-1px);}
.nav-toggle{
  margin-left:auto;display:none;width:44px;height:44px;border-radius:var(--radius-sm);
  background:var(--panel);border:1px solid var(--line);color:var(--text);
  align-items:center;justify-content:center;cursor:pointer;font-size:17px;
}
.mobile-drawer{
  display:none;position:fixed;inset:0;z-index:1050;
  background:rgba(8,10,13,.98);backdrop-filter:blur(6px);
  padding:80px 24px 40px;flex-direction:column;gap:4px;
}
.mobile-drawer.open{display:flex;}
.drawer-close{
  position:absolute;top:18px;right:20px;width:44px;height:44px;border-radius:var(--radius-sm);
  background:var(--panel);border:1px solid var(--line);color:var(--text);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.drawer-link{
  display:flex;align-items:center;height:56px;padding-left:18px;font-size:17px;
  color:var(--text-2);border-left:2px solid transparent;
}
.drawer-link.active{color:var(--brand);border-left-color:var(--brand);background:rgba(46,230,168,.06);}
.drawer-link:hover{color:var(--text);}
.drawer-cta{
  margin-top:24px;height:52px;border-radius:var(--radius-sm);
  background:var(--brand);color:#06120D;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  padding:88px 0 76px;
  background-image:linear-gradient(180deg,rgba(11,14,17,.72) 0%,rgba(11,14,17,.92) 62%,var(--bg) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  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(ellipse at 30% 20%,#000 0%,transparent 74%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 20%,#000 0%,transparent 74%);
  pointer-events:none;
}
.cat-hero .shell{position:relative;z-index:2;}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:26px;}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav span.sep{color:var(--text-3);}
.cat-hero h1{
  font-size:clamp(30px,4.2vw,52px);
  font-weight:700;max-width:900px;letter-spacing:.02em;
}
.cat-hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{margin-top:18px;font-size:17px;color:var(--text-2);max-width:640px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.btn-primary-kx,.btn-ghost-kx{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 26px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);
}
.btn-primary-kx{background:var(--brand);color:#06120D;border-color:var(--brand);}
.btn-primary-kx:hover{background:#4CF0B8;color:#06120D;box-shadow:var(--glow);transform:translateY(-2px);}
.btn-ghost-kx{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn-ghost-kx:hover{border-color:var(--brand);color:var(--brand);background:rgba(46,230,168,.06);transform:translateY(-2px);}
.anchor-bar{
  margin-top:44px;display:flex;flex-wrap:wrap;gap:10px;
  border-top:1px solid var(--line);padding-top:24px;
}
.anchor-bar a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-2);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  padding:8px 14px;border-radius:999px;transition:all .2s var(--ease);
}
.anchor-bar a:hover{color:var(--brand);border-color:rgba(46,230,168,.4);background:rgba(46,230,168,.08);}
.anchor-bar a i{font-size:12px;opacity:.8;}

/* ---------- Mosaic ---------- */
.mosaic{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;}
.m-card{
  grid-column:span 3;
  position:relative;display:flex;flex-direction:column;
  background:var(--panel-2);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.m-card:hover{transform:translateY(-3px);border-color:rgba(46,230,168,.32);}
.m-card.wide{grid-column:span 3;}
.m-card.third{grid-column:span 2;}
.m-media{position:relative;aspect-ratio:16/9;overflow:hidden;}
.m-card.third .m-media{aspect-ratio:4/3;}
.m-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.m-card:hover .m-media img{transform:scale(1.04);}
.m-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,17,.1) 0%,rgba(11,14,17,.86) 100%);
}
.m-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.m-tag{
  align-self:flex-start;font-size:12px;font-weight:600;
  padding:4px 11px;border-radius:999px;
  background:rgba(46,230,168,.12);color:var(--brand);
  border:1px solid rgba(46,230,168,.22);
}
.m-tag.amber{background:rgba(255,181,69,.12);color:var(--amber);border-color:rgba(255,181,69,.24);}
.m-tag.violet{background:rgba(138,107,255,.12);color:#A995FF;border-color:rgba(138,107,255,.26);}
.m-body h3{font-size:20px;}
.m-body p{color:var(--text-2);font-size:14.5px;}
.m-list{display:flex;flex-direction:column;gap:8px;margin-top:2px;}
.m-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);}
.m-list li i{color:var(--brand);font-size:12px;margin-top:6px;flex-shrink:0;}
.m-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--text-3);font-family:var(--mono);
}
.m-foot a{color:var(--brand);font-family:var(--sans);font-size:13.5px;font-weight:600;}

/* ---------- Compare ---------- */
.cmp-wrap{
  background:var(--panel-2);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);
}
.cmp-head,.cmp-row{
  display:grid;grid-template-columns:1.05fr 1.7fr .95fr 1fr .95fr;
  gap:18px;align-items:center;padding:18px 26px;
}
.cmp-head{
  background:rgba(255,255,255,.04);font-size:13px;color:var(--text-2);
  letter-spacing:.06em;font-weight:600;border-bottom:1px solid var(--line);
}
.cmp-row{
  position:relative;border-top:1px solid var(--line);font-size:14.5px;
  transition:background .2s var(--ease);
}
.cmp-row:first-of-type{border-top:none;}
.cmp-row:nth-of-type(even){background:rgba(255,255,255,.03);}
.cmp-row:hover{background:rgba(46,230,168,.045);}
.cmp-row:hover::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--brand);box-shadow:var(--glow);
}
.cmp-name{font-weight:700;font-size:15.5px;display:flex;flex-direction:column;gap:4px;}
.cmp-name small{font-family:var(--mono);font-size:11.5px;color:var(--text-3);font-weight:400;letter-spacing:.06em;}
.cmp-row .cell-txt{color:var(--text-2);}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);
}
.chip.on{background:rgba(46,230,168,.12);border-color:rgba(46,230,168,.26);color:var(--brand);}
.chip.off{color:var(--text-3);}
.chip.hot{background:rgba(255,181,69,.12);border-color:rgba(255,181,69,.26);color:var(--amber);}
.cmp-note{
  padding:16px 26px;font-size:13px;color:var(--text-3);
  border-top:1px solid var(--line);background:rgba(255,255,255,.02);
}

/* ---------- Advice ---------- */
.advice-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px;}
.advice-card{
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;display:flex;flex-direction:column;gap:12px;
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.advice-card:hover{transform:translateY(-3px);border-color:rgba(46,230,168,.3);}
.advice-card .num{
  font-family:var(--mono);font-size:34px;font-weight:700;
  color:transparent;-webkit-text-stroke:1px rgba(46,230,168,.55);
  line-height:1;
}
.advice-card h3{font-size:19px;}
.advice-card p{color:var(--text-2);font-size:14.5px;}
.a-span-5{grid-column:span 5;}
.a-span-7{grid-column:span 7;}
.a-span-4{grid-column:span 4;}
.a-span-6{grid-column:span 6;}
.a-span-8{grid-column:span 8;}

/* ---------- FAQ ---------- */
.kx-faq{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;
  --bs-accordion-btn-color:var(--text);--bs-accordion-active-color:var(--brand);
  --bs-accordion-btn-focus-box-shadow:none;--bs-accordion-body-padding-x:0;
  --bs-accordion-btn-padding-x:0;--bs-accordion-border-radius:0;}
.kx-faq .accordion-item{
  background:transparent;border:none;border-bottom:1px solid var(--line);border-radius:0;
}
.kx-faq .accordion-button{
  background:transparent;padding:22px 40px 22px 0;font-size:17px;font-weight:600;
  color:var(--text);box-shadow:none;position:relative;line-height:1.5;
}
.kx-faq .accordion-button::after{display:none;}
.kx-faq .accordion-button::before{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--brand);transition:transform .25s var(--ease);
}
.kx-faq .accordion-button:not(.collapsed)::before{content:"\f068";}
.kx-faq .accordion-button:not(.collapsed){color:var(--brand);}
.kx-faq .accordion-button:hover{color:var(--brand);}
.kx-faq .accordion-body{
  padding:0 60px 26px 18px;color:var(--text-2);font-size:15px;line-height:1.85;
  border-left:2px solid transparent;
}
.kx-faq .accordion-collapse.show + .accordion-body,
.kx-faq .accordion-collapse{position:relative;}
.kx-faq .accordion-item:has(.accordion-collapse.show) .accordion-body{
  border-left-color:var(--brand);
}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#12161B 0%,#0D1116 100%);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:56px 48px;box-shadow:var(--shadow);
}
.cta-panel::before{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,230,168,.18) 0%,rgba(46,230,168,0) 70%);
  pointer-events:none;
}
.cta-panel::after{
  content:"";position:absolute;left:-90px;bottom:-140px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(138,107,255,.14) 0%,rgba(138,107,255,0) 72%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:center;}
.cta-inner h2{font-size:clamp(22px,2.6vw,34px);margin-bottom:14px;}
.cta-inner p{color:var(--text-2);font-size:15px;}
.cta-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}
.cta-points{display:flex;flex-direction:column;gap:14px;}
.cta-point{
  display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:14px 16px;
}
.cta-point i{color:var(--amber);font-size:14px;margin-top:5px;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--footer-bg);border-top:1px solid var(--line);
  position:relative;margin-top:0;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(46,230,168,.7) 0%,rgba(46,230,168,.1) 48%,rgba(46,230,168,0) 100%);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-latin{font-size:19px;}
.footer-brand .brand-cn{font-size:19px;}
.footer-desc{color:var(--text-2);font-size:14px;max-width:320px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text);letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{color:var(--text-2);font-size:14px;}
.footer-col ul a:hover{color:var(--brand);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:14px;}
.footer-contact li i{color:var(--brand);font-size:13px;margin-top:5px;flex-shrink:0;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .shell{padding:0 22px;}
  .section{padding:88px 0;}
  .a-span-5,.a-span-7{grid-column:span 6;}
}
@media (max-width:991.98px){
  .main-nav{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  .mosaic{grid-template-columns:repeat(4,1fr);}
  .m-card,.m-card.wide{grid-column:span 2;}
  .m-card.third{grid-column:span 2;}
  .cmp-head{display:none;}
  .cmp-row{grid-template-columns:1fr;gap:10px;padding:20px 22px;}
  .cmp-row > span{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;}
  .cmp-row > span::before{
    content:attr(data-label);color:var(--text-3);font-size:12px;
    flex-shrink:0;padding-top:2px;letter-spacing:.04em;
  }
  .cmp-row:hover::before{width:3px;border-radius:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-inner{grid-template-columns:1fr;gap:30px;}
  .a-span-5,.a-span-7,.a-span-4,.a-span-6,.a-span-8{grid-column:span 12;}
}
@media (max-width:767.98px){
  .section{padding:60px 0;}
  .cat-hero{padding:64px 0 58px;}
  .mosaic{grid-template-columns:1fr;gap:16px;}
  .m-card,.m-card.wide,.m-card.third{grid-column:span 1;}
  .cta-panel{padding:38px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding:48px 0 34px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .hero-actions .btn-primary-kx,.hero-actions .btn-ghost-kx{width:100%;}
  .cta-actions .btn-primary-kx,.cta-actions .btn-ghost-kx{width:100%;}
}
@media (max-width:575.98px){
  .shell{padding:0 18px;}
  .cat-hero h1{font-size:28px;}
  .m-body{padding:20px;}
  .anchor-bar a{font-size:12.5px;padding:7px 12px;}
  .kx-faq .accordion-button{font-size:15.5px;padding-right:34px;}
  .kx-faq .accordion-body{padding-right:20px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}