/* roulang page: index */
:root{
  --bg-0:#050A14;
  --bg-1:#0A1322;
  --bg-2:rgba(255,255,255,.045);
  --brand-500:#2FB8FF;
  --brand-700:#0B6FB8;
  --accent-500:#FF7A2F;
  --accent-300:#FFB020;
  --ink-1:#F2F7FF;
  --ink-2:#A9B8CE;
  --ink-3:#6F819A;
  --line-1:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --glass-bg:rgba(12,24,42,.55);
  --glass-border:rgba(120,200,255,.14);
  --glass-blur:blur(14px) saturate(140%);
  --glow-brand:0 0 0 1px rgba(47,184,255,.28), 0 14px 44px rgba(47,184,255,.18);
  --glow-accent:0 8px 28px rgba(255,122,47,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 6px 18px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(0,0,0,.45);
  --sh-3:0 28px 70px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:#050A14;
  --bs-body-color:#A9B8CE;
  --bs-link-color:#2FB8FF;
  --bs-link-hover-color:#7FD2FF;
  --bs-border-color:rgba(255,255,255,.12);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:repeating-linear-gradient(115deg,rgba(47,184,255,.05) 0 1px,transparent 1px 88px),
                   repeating-linear-gradient(25deg,rgba(120,200,255,.035) 0 1px,transparent 1px 120px);
  opacity:.7;
}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),text-underline-offset .2s var(--ease)}
a:hover{color:#7FD2FF;text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--ink-1);font-weight:700;letter-spacing:.2px;margin:0}
h1{font-size:clamp(28px,4.6vw,52px);line-height:1.2;font-weight:800}
h2{font-size:clamp(22px,3vw,34px);line-height:1.3}
h3{font-size:clamp(18px,1.4vw,22px);line-height:1.45;font-weight:600}
p{margin:0 0 16px;max-width:74ch}
ul,ol{margin:0 0 16px;padding-left:20px}
li{margin-bottom:8px}
strong{color:var(--ink-1);font-weight:600}
.container{max-width:1240px;padding-left:32px;padding-right:32px;position:relative;z-index:2}
.section{padding:96px 0;position:relative}
.section.alt{background:linear-gradient(180deg,rgba(10,19,34,.9),rgba(5,10,16,.9))}
.section-head{max-width:760px;margin-bottom:48px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand-500);font-weight:600;margin-bottom:14px;
}
.section-head .eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand-500),transparent);border-radius:2px}
.section-head p{margin-top:14px;color:var(--ink-2)}
.eyebrow-plain{color:var(--brand-500);font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px;display:block}

/* 导航 */
.site-nav{
  position:absolute;top:0;left:0;right:0;z-index:60;
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);
  backdrop-filter:var(--glass-blur);
  border-bottom:1px solid var(--line-1);
  box-shadow:0 10px 34px rgba(0,0,0,.35);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-nav .nav-inner{
  display:flex;align-items:center;gap:24px;height:72px;
  transition:height .24s var(--ease);
}
.site-nav.is-stuck{
  position:fixed;
  background:rgba(6,11,22,.94);
  box-shadow:0 16px 40px rgba(0,0,0,.55);
  border-bottom-color:var(--line-2);
}
.site-nav.is-stuck .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;min-height:32px;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand-500),var(--brand-700) 70%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 1px rgba(47,184,255,.35),0 8px 20px rgba(47,184,255,.25);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{color:var(--ink-1);font-size:16px;font-weight:800;letter-spacing:.4px}
.brand-text span{color:var(--ink-3);font-size:11px;letter-spacing:.22em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  color:var(--ink-2);font-size:15px;font-weight:500;
  padding:9px 14px;border-radius:var(--r-pill);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--ink-1);background:rgba(47,184,255,.12);text-decoration:none}
.nav-links a.active{color:var(--ink-1);background:rgba(47,184,255,.16);box-shadow:inset 0 0 0 1px rgba(47,184,255,.28)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line-2);border-radius:var(--r-pill);
  padding:8px 14px;color:var(--ink-3);font-size:14px;
  background:rgba(255,255,255,.03);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-search:hover{border-color:rgba(47,184,255,.45);color:var(--ink-2);text-decoration:none}
.nav-search svg{width:15px;height:15px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-2);background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-1);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-1);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  position:fixed;inset:0;z-index:80;display:none;
  background:rgba(6,11,22,.96);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  padding:22px 20px 40px;
}
.mobile-drawer.open{display:block}
.mobile-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-2);
  background:rgba(255,255,255,.04);color:var(--ink-1);font-size:20px;line-height:1;cursor:pointer;
}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;min-height:48px;
  color:var(--ink-1);font-size:17px;font-weight:600;
  border-bottom:1px solid var(--line-1);text-decoration:none;
}
.mobile-drawer a.drawer-link:hover{color:var(--brand-500);text-decoration:none}
.mobile-drawer .drawer-cta{margin-top:24px;display:block;text-align:center}

/* 按钮 */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:16px;font-weight:600;padding:14px 30px;border-radius:var(--r-pill);
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-main{
  background:linear-gradient(135deg,var(--accent-500),#FF9A4D 55%,var(--accent-300));
  color:#1A0D03;
  box-shadow:var(--glow-accent);
}
.btn-main:hover{transform:translateY(-1px);box-shadow:0 14px 38px rgba(255,122,47,.45);color:#1A0D03;text-decoration:none;filter:brightness(1.05)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;border-color:rgba(47,184,255,.5);color:var(--ink-1);
}
.btn-ghost:hover{background:rgba(47,184,255,.10);border-color:var(--brand-500);color:var(--ink-1);text-decoration:none;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-main:focus-visible,.btn-ghost:focus-visible,.nav-links a:focus-visible,.nav-search:focus-visible,.nav-toggle:focus-visible{
  outline:3px solid rgba(47,184,255,.7);outline-offset:2px;
}
.btn-sm{padding:11px 22px;font-size:15px}

/* Hero */
.hero{
  position:relative;
  padding:172px 0 84px;
  overflow:hidden;
  background:radial-gradient(1100px 520px at 78% 8%,rgba(47,184,255,.14),transparent 62%),
             radial-gradient(760px 420px at 12% 88%,rgba(255,122,47,.09),transparent 66%),
             linear-gradient(180deg,#06101F 0%,#050A14 100%);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,184,255,.55),rgba(255,122,47,.4),transparent);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  border:1px solid var(--glass-border);background:rgba(47,184,255,.09);
  border-radius:var(--r-pill);padding:8px 16px;color:var(--brand-500);
  font-size:13px;font-weight:600;letter-spacing:.06em;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 12px var(--brand-500)}
.hero h1{margin:20px 0 18px}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--brand-500),#8FE1FF 45%,var(--accent-300));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{font-size:17px;color:var(--ink-2);max-width:60ch;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;border-top:1px solid var(--line-1);padding-top:24px}
.hero-stats .stat b{
  display:block;font-family:"DIN Alternate","Bebas Neue",Impact,sans-serif;
  font-variant-numeric:tabular-nums;font-size:clamp(24px,2.6vw,34px);
  color:var(--ink-1);line-height:1.1;letter-spacing:.5px;
}
.hero-stats .stat span{display:block;font-size:13px;color:var(--ink-3);margin-top:6px}
.hero-visual{position:relative;border-radius:var(--r-lg);padding:10px;background:rgba(12,24,42,.5);border:1px solid var(--glass-border);box-shadow:var(--glow-brand)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:calc(var(--r-lg) - 8px);background:#0A1322}
.hero-visual .tag-float{
  position:absolute;left:-14px;bottom:26px;
  background:rgba(6,11,22,.92);border:1px solid rgba(47,184,255,.35);
  border-radius:var(--r-md);padding:12px 18px;box-shadow:var(--sh-2);
}
.hero-visual .tag-float b{display:block;color:var(--ink-1);font-size:14px}
.hero-visual .tag-float span{font-size:12px;color:var(--ink-3)}

/* 入口步骤 */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.entry-card{
  background:var(--bg-2);border:1px solid var(--line-1);border-radius:var(--r-md);
  padding:28px 24px;position:relative;transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(47,184,255,.35);box-shadow:var(--sh-2)}
.entry-card .num{
  font-family:"DIN Alternate","Bebas Neue",sans-serif;font-variant-numeric:tabular-nums;
  font-size:34px;color:rgba(47,184,255,.5);line-height:1;margin-bottom:14px;
}
.entry-card h3{margin-bottom:10px;font-size:19px}
.entry-card p{font-size:15px;margin-bottom:0;color:var(--ink-2)}

/* 功能矩阵 */
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.matrix-item{
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid var(--line-1);border-radius:var(--r-md);padding:24px 20px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.matrix-item:hover{transform:translateY(-4px);border-color:rgba(47,184,255,.32);background:linear-gradient(160deg,rgba(47,184,255,.14),rgba(255,255,255,.02))}
.matrix-item .ico{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(47,184,255,.14);border:1px solid rgba(47,184,255,.3);margin-bottom:16px;
}
.matrix-item .ico svg{width:20px;height:20px;stroke:var(--brand-500);fill:none;stroke-width:1.8}
.matrix-item h3{font-size:17px;margin-bottom:8px}
.matrix-item p{font-size:14px;color:var(--ink-3);margin-bottom:0;line-height:1.7}
.badge-soft{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-500);background:rgba(47,184,255,.10);
  border:1px solid rgba(47,184,255,.25);border-radius:var(--r-pill);padding:4px 12px;
}
.badge-accent{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;
  color:#2A1200;background:linear-gradient(135deg,var(--accent-500),var(--accent-300));
  border-radius:var(--r-pill);padding:4px 12px;
}

/* 等级阶梯 */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:end}
.tier{
  background:var(--bg-2);border:1px solid var(--line-1);border-radius:var(--r-lg);
  padding:30px 26px;position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.tier:nth-child(1){margin-bottom:0}
.tier:nth-child(2){margin-bottom:26px}
.tier:nth-child(3){margin-bottom:52px}
.tier:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.tier.recommend{border-color:rgba(47,184,255,.45);box-shadow:var(--glow-brand);background:linear-gradient(170deg,rgba(47,184,255,.12),rgba(255,255,255,.02))}
.tier .tier-flag{
  position:absolute;top:-13px;right:22px;
  background:linear-gradient(135deg,var(--accent-500),var(--accent-300));
  color:#2A1200;font-size:12px;font-weight:700;padding:5px 14px;border-radius:var(--r-pill);
}
.tier h3{font-size:20px;margin-bottom:6px}
.tier .tier-sub{font-size:13px;color:var(--ink-3);margin-bottom:18px}
.tier .tier-value{
  font-family:"DIN Alternate","Bebas Neue",Impact,sans-serif;font-variant-numeric:tabular-nums;
  font-size:42px;line-height:1;color:var(--accent-300);margin-bottom:6px;
}
.tier .tier-value small{font-size:16px;color:var(--ink-3);margin-left:6px;font-family:inherit}
.tier ul{list-style:none;padding:0;margin:20px 0 24px;border-top:1px solid var(--line-1);padding-top:18px}
.tier ul li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-2);margin-bottom:10px}
.tier ul li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:3px;
  background:rgba(47,184,255,.55);box-shadow:0 0 0 3px rgba(47,184,255,.12);
}
.tier .btn-main,.tier .btn-ghost{width:100%}

/* 对比表 */
.compare-wrap{overflow:hidden;border:1px solid var(--line-1);border-radius:var(--r-lg);background:rgba(255,255,255,.02)}
table.compare{width:100%;border-collapse:collapse}
table.compare th,table.compare td{
  padding:18px 20px;text-align:left;font-size:15px;
  border-bottom:1px solid var(--line-1);vertical-align:middle;
}
table.compare thead th{
  background:rgba(10,19,34,.92);color:var(--ink-1);font-size:15px;font-weight:700;
  position:sticky;top:0;z-index:3;
}
table.compare tbody th{
  color:var(--ink-1);font-weight:600;background:rgba(10,19,34,.7);
  position:sticky;left:0;z-index:2;min-width:172px;
}
table.compare td{color:var(--ink-2)}
table.compare .col-hot{background:rgba(47,184,255,.10);box-shadow:inset 0 0 0 1px rgba(47,184,255,.22)}
table.compare thead .col-hot{color:var(--ink-1);position:relative}
table.compare thead .col-hot::after{
  content:"推荐";position:absolute;top:8px;right:10px;font-size:11px;
  background:linear-gradient(135deg,var(--accent-500),var(--accent-300));color:#2A1200;
  border-radius:var(--r-pill);padding:2px 10px;font-weight:700;
}
table.compare tr:last-child th,table.compare tr:last-child td{border-bottom:0}
.compare-cards{display:none;gap:18px;grid-template-columns:1fr}
.compare-card{
  background:var(--bg-2);border:1px solid var(--line-1);border-radius:var(--r-md);padding:22px;
}
.compare-card.hot{border-color:rgba(47,184,255,.42);box-shadow:var(--glow-brand)}
.compare-card h3{font-size:18px;margin-bottom:4px}
.compare-card .kv{list-style:none;padding:0;margin:16px 0 0;border-top:1px solid var(--line-1);padding-top:14px}
.compare-card .kv li{display:flex;justify-content:space-between;gap:14px;font-size:14px;margin-bottom:10px}
.compare-card .kv li b{color:var(--ink-3);font-weight:500}
.compare-card .kv li span{color:var(--ink-1);text-align:right}

/* 限时入口 */
.limited{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  border-radius:var(--r-lg);padding:30px 34px;
  background:linear-gradient(120deg,rgba(47,184,255,.10),rgba(255,122,47,.10)),rgba(10,19,34,.85);
  border:1px solid var(--glass-border);box-shadow:var(--sh-2);
}
.limited .left{flex:1 1 460px;min-width:280px}
.limited h3{font-size:20px;margin-bottom:6px}
.limited p{font-size:14px;color:var(--ink-3);margin-bottom:16px}
.countdown{display:flex;align-items:center;gap:10px}
.cd-box{
  min-width:62px;text-align:center;border-radius:var(--r-sm);padding:8px 6px 6px;
  background:rgba(255,122,47,.14);border:1px solid rgba(255,122,47,.35);
}
.cd-box b{
  display:block;font-family:"DIN Alternate","Bebas Neue",Impact,sans-serif;
  font-variant-numeric:tabular-nums;font-size:26px;color:var(--accent-300);line-height:1;
}
.cd-box span{font-size:11px;color:var(--ink-3);letter-spacing:.1em}
.cd-sep{color:var(--ink-3);font-size:20px;line-height:1}
.progress-line{height:6px;border-radius:var(--r-pill);background:rgba(255,255,255,.08);overflow:hidden;margin-top:18px;max-width:420px}
.progress-line i{display:block;height:100%;width:68%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--brand-500),var(--accent-300))}

/* 资讯列表 */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:38px}
.news-head p{margin:12px 0 0;color:var(--ink-2)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--bg-2);
  border:1px solid var(--line-1);border-radius:var(--r-md);overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(47,184,255,.35);box-shadow:var(--sh-2)}
.news-thumb{display:block;overflow:hidden;background:#0A1322;aspect-ratio:16/9}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.news-meta time{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.news-card h3{font-size:17px;line-height:1.5;margin-bottom:10px;transition:color .2s var(--ease)}
.news-card h3 a{color:var(--ink-1)}
.news-card:hover h3 a{color:var(--brand-500);text-decoration:none}
.news-card .excerpt{font-size:14px;color:var(--ink-3);line-height:1.7;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .more{margin-top:auto;font-size:14px;font-weight:600;color:var(--brand-500)}
.news-card .more:hover{text-decoration:none;color:#7FD2FF}
.empty-state{
  grid-column:1/-1;text-align:center;padding:64px 24px;
  border:1px dashed var(--line-2);border-radius:var(--r-lg);background:rgba(255,255,255,.02);
}
.empty-state .es-ico{
  width:54px;height:54px;margin:0 auto 16px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,184,255,.1);border:1px solid rgba(47,184,255,.25);
}
.empty-state .es-ico svg{width:24px;height:24px;stroke:var(--brand-500);fill:none;stroke-width:1.7}
.empty-state p{color:var(--ink-2);margin:0 0 14px}

/* FAQ */
.accordion-item{
  background:var(--bg-2);border:1px solid var(--line-1);border-radius:var(--r-md)!important;
  margin-bottom:14px;overflow:hidden;
}
.accordion-button{
  background:transparent;color:var(--ink-1);font-size:17px;font-weight:600;
  padding:20px 54px 20px 22px;border:0;box-shadow:none;position:relative;
}
.accordion-button:not(.collapsed){background:rgba(47,184,255,.08);color:var(--ink-1);box-shadow:none}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(47,184,255,.45);border:0}
.accordion-button::after{
  content:"";position:absolute;right:22px;top:50%;width:11px;height:11px;
  border-right:2px solid var(--brand-500);border-bottom:2px solid var(--brand-500);
  transform:translateY(-70%) rotate(45deg);transition:transform .22s var(--ease);
  background-image:none;
}
.accordion-button:not(.collapsed)::after{transform:translateY(-30%) rotate(225deg)}
.accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(47,184,255,.35);box-shadow:0 0 0 1px rgba(47,184,255,.14)}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent-500),var(--accent-300));
}
.accordion-body{padding:6px 22px 22px;color:var(--ink-2);font-size:15px;line-height:1.75;max-width:78ch}

/* 表单 */
.contact-grid{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:start}
.form-card{
  background:var(--bg-2);border:1px solid var(--line-1);border-radius:var(--r-lg);padding:32px;
}
.form-card h3{font-size:20px;margin-bottom:8px}
.form-card .hint{font-size:14px;color:var(--ink-3);margin-bottom:24px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--ink-1);font-weight:600;margin-bottom:8px}
.field .ctrl{
  width:100%;padding:13px 16px;border-radius:var(--r-sm);
  background:rgba(6,11,22,.72);border:1px solid var(--line-2);
  color:var(--ink-1);font-size:15px;font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field .ctrl::placeholder{color:var(--ink-3)}
.field .ctrl:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(47,184,255,.28)}
.field.error .ctrl{border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,122,47,.2)}
.field .err-msg{display:none;color:#FFB4A0;font-size:13px;margin-top:6px}
.field.error .err-msg{display:block}
select.ctrl{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-2);margin:6px 0 22px}
.agree input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand-500);flex:0 0 auto}
.trust-card{
  background:linear-gradient(170deg,rgba(47,184,255,.10),rgba(255,255,255,.02));
  border:1px solid var(--glass-border);border-radius:var(--r-lg);padding:30px;
}
.trust-card h3{font-size:18px;margin-bottom:18px}
.trust-list{list-style:none;padding:0;margin:0}
.trust-list li{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--line-1)}
.trust-list li:last-child{border-bottom:0;padding-bottom:0}
.trust-list .tl-ico{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,184,255,.13);border:1px solid rgba(47,184,255,.28);
}
.trust-list .tl-ico svg{width:17px;height:17px;stroke:var(--brand-500);fill:none;stroke-width:1.8}
.trust-list strong{display:block;color:var(--ink-1);font-size:15px;margin-bottom:4px}
.trust-list span{font-size:13px;color:var(--ink-3);line-height:1.65}

/* CTA 条 */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  border-radius:var(--r-lg);padding:34px;
  background:linear-gradient(120deg,rgba(47,184,255,.14),rgba(255,122,47,.10)),rgba(10,19,34,.9);
  border:1px solid var(--glass-border);box-shadow:var(--glow-brand);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:8px}
.cta-band p{margin:0;color:var(--ink-2);font-size:15px}

/* 页脚 */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line-1);
  padding:68px 0 0;position:relative;z-index:2;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand b{color:var(--ink-1);font-size:17px;font-weight:800;letter-spacing:.4px}
.site-footer p{font-size:14px;color:var(--ink-3);max-width:36ch;line-height:1.75}
.site-footer h4{font-size:15px;color:var(--ink-1);margin-bottom:16px;font-weight:700}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--ink-2);font-size:14px}
.footer-links a:hover{color:var(--brand-500)}
.footer-contact{list-style:none;padding:0;margin:0;font-size:14px;color:var(--ink-2)}
.footer-contact li{margin-bottom:12px;line-height:1.7}
.footer-contact b{color:var(--ink-1);font-weight:600}
.footer-bottom{
  border-top:1px solid var(--line-1);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3)}
.footer-bottom a:hover{color:var(--brand-500)}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;z-index:70;
  background:rgba(6,11,22,.86);border:1px solid rgba(47,184,255,.35);color:var(--brand-500);
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease),transform .24s var(--ease);
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-3px);text-decoration:none;background:rgba(47,184,255,.14)}
.to-top svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (max-width:1199px){
  .container{padding-left:26px;padding-right:26px}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:flex}
  .hero{padding:142px 0 68px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .entry-grid{grid-template-columns:1fr;gap:16px}
  .tiers{grid-template-columns:1fr;align-items:stretch}
  .tier:nth-child(2),.tier:nth-child(3){margin-bottom:0}
  .compare-wrap{display:none}
  .compare-cards{display:grid}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:767px){
  .news-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr;gap:20px}
  .limited{padding:24px}
  .form-card,.trust-card{padding:24px}
}
@media (max-width:575px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:48px 0}
  .hero{padding:126px 0 56px}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
  .matrix{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:26px 22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@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-0:#050A14;
  --bg-1:#0A1322;
  --bg-2:rgba(255,255,255,.045);
  --brand-500:#2FB8FF;
  --brand-700:#0B6FB8;
  --accent-500:#FF7A2F;
  --accent-300:#FFB020;
  --ink-1:#F2F7FF;
  --ink-2:#A9B8CE;
  --ink-3:#6F819A;
  --glass-bg:rgba(12,24,42,.55);
  --glass-border:rgba(120,200,255,.14);
  --glass-blur:blur(14px) saturate(140%);
  --glow-brand:0 0 0 1px rgba(47,184,255,.28),0 14px 44px rgba(47,184,255,.18);
  --glow-accent:0 8px 28px rgba(255,122,47,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(0,0,0,.30);
  --sh-2:0 14px 34px rgba(0,0,0,.42);
  --sh-3:0 26px 60px rgba(0,0,0,.52);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(120,200,255,.22);
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --num:"DIN Alternate","Bebas Neue","Oswald",var(--sans);
  --bs-body-bg:#050A14;
  --bs-body-color:#A9B8CE;
  --bs-link-color:#2FB8FF;
  --bs-link-hover-color:#7FD2FF;
  --bs-border-color:rgba(120,200,255,.14);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-2);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none;transition:color .2s cubic-bezier(.2,.7,.3,1),text-underline-offset .2s}
a:hover{color:#7FD2FF;text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(47,184,255,.55);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{color:var(--ink-1);margin:0 0 12px;font-weight:700;letter-spacing:.2px}
h1{font-size:clamp(28px,4.2vw,46px);line-height:1.22;font-weight:800}
h2{font-size:clamp(22px,3vw,34px);line-height:1.3}
h3{font-size:20px;line-height:1.45;font-weight:600}
h4{font-size:16px;line-height:1.5;font-weight:600}
p{margin:0 0 16px;max-width:74ch}
ul,ol{margin:0 0 16px;padding-left:20px}
li{margin-bottom:8px}
.num{font-family:var(--num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:96px 0;position:relative}
.section--tight{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-500);letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.sec-head .eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--brand-500))}
.sec-head p{color:var(--ink-3);margin-bottom:0}

/* ============ 导航 ============ */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:1050;
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);
  backdrop-filter:var(--glass-blur);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 8px 30px rgba(0,0,0,.28);
  transition:background .24s cubic-bezier(.2,.7,.3,1),box-shadow .24s,transform .24s;
}
.site-nav .nav-inner{display:flex;align-items:center;gap:24px;height:72px;transition:height .24s cubic-bezier(.2,.7,.3,1)}
.site-nav.is-stuck{background:rgba(6,11,22,.94);box-shadow:0 14px 40px rgba(0,0,0,.55);border-bottom-color:rgba(120,200,255,.16)}
.site-nav.is-stuck .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:12px;min-height:32px;text-decoration:none!important;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,#2FB8FF,#0B6FB8);
  box-shadow:0 8px 20px rgba(47,184,255,.32);flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{color:var(--ink-1);font-size:16px;font-weight:800;letter-spacing:.4px}
.brand-text span{font-size:10px;letter-spacing:2.6px;color:var(--ink-3)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  color:var(--ink-2);font-size:15px;padding:9px 14px;border-radius:var(--r-pill);
  text-decoration:none!important;position:relative;transition:color .2s,background .2s;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--ink-1);background:rgba(47,184,255,.10)}
.nav-links a.active{color:var(--ink-1);background:rgba(47,184,255,.14);box-shadow:inset 0 0 0 1px rgba(47,184,255,.28)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:12px}
.nav-search{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);padding:9px 14px;border-radius:var(--r-pill);border:1px solid var(--line);text-decoration:none!important}
.nav-search svg{width:16px;height:16px}
.nav-search:hover{color:var(--ink-1);border-color:var(--line-strong);background:rgba(47,184,255,.08)}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:16px;font-weight:600;padding:13px 26px;border-radius:12px;border:1px solid transparent;
  cursor:pointer;text-decoration:none!important;transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s,background .2s,color .2s,filter .2s;
  min-height:44px;
}
.btn-main{color:#160800;background:linear-gradient(135deg,#FF9A4D,#FF7A2F);box-shadow:var(--glow-accent)}
.btn-main:hover{color:#160800;transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 34px rgba(255,122,47,.48)}
.btn-main:active{transform:translateY(1px);box-shadow:0 4px 16px rgba(255,122,47,.32)}
.btn-ghost{color:var(--ink-1);background:transparent;border-color:rgba(47,184,255,.45)}
.btn-ghost:hover{color:var(--ink-1);background:rgba(47,184,255,.10);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px;min-height:40px}
.btn-main[disabled],.btn-ghost[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:rgba(255,255,255,.04);border-radius:12px;position:relative;cursor:pointer}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--ink-1);border-radius:2px;transform:translateX(-50%);
  transition:transform .22s,opacity .22s;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{content:"";top:-6px}
.nav-toggle span::after{content:"";top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0}

/* ============ 页头 ============ */
.page-hero{
  position:relative;padding:150px 0 76px;
  background:
    linear-gradient(180deg,rgba(5,10,20,.72) 0%,rgba(5,10,20,.90) 55%,var(--bg-0) 100%),
    url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(120,200,255,.06) 0 1px,transparent 1px 74px);
  opacity:.55;
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand-500)}
.crumbs .sep{opacity:.55}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.badge-soft{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-500);
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(47,184,255,.10);border:1px solid rgba(47,184,255,.28);
}
.badge-soft.is-accent{color:var(--accent-300);background:rgba(255,176,32,.10);border-color:rgba(255,176,32,.30)}
.page-hero h1{max-width:20ch;margin-bottom:16px}
.page-hero .lede{font-size:17px;color:var(--ink-2);max-width:64ch;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,.08)}
.hero-stats .stat{flex:1 1 168px;min-width:150px}
.hero-stats .stat b{display:block;font-family:var(--num);font-size:28px;color:var(--ink-1);line-height:1.1}
.hero-stats .stat span{font-size:13px;color:var(--ink-3)}

/* ============ 通用组件 ============ */
.card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px;
  box-shadow:var(--sh-1);
  transition:transform .24s cubic-bezier(.2,.7,.3,1),box-shadow .24s,border-color .24s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.card h3{margin-bottom:10px}
.card p:last-child{margin-bottom:0}
.img-frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:#08111f;
  border:1px solid var(--line-strong);box-shadow:var(--glow-brand);
}
.img-frame img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s cubic-bezier(.2,.7,.3,1)}
.img-frame:hover img{transform:scale(1.03)}
.img-frame .corner{
  position:absolute;top:14px;left:14px;font-size:12px;letter-spacing:1.6px;color:#04131F;
  background:linear-gradient(135deg,#FF9A4D,#FF7A2F);padding:6px 12px;border-radius:var(--r-pill);font-weight:700;
}
.tick-list{list-style:none;padding:0;margin:0}
.tick-list li{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px;color:var(--ink-2)}
.tick-list li::before{
  content:"";flex:0 0 20px;height:20px;margin-top:3px;border-radius:6px;
  background:rgba(47,184,255,.14);
  box-shadow:inset 0 0 0 1px rgba(47,184,255,.35);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232FB8FF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E");
  background-size:13px 13px;background-position:center;background-repeat:no-repeat;
}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split--rev{grid-template-columns:.95fr 1.05fr}
.kv-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.kv-mini div{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 18px}
.kv-mini b{display:block;font-family:var(--num);font-size:22px;color:var(--brand-500);line-height:1.2}
.kv-mini span{font-size:13px;color:var(--ink-3)}

/* 准备清单 */
.band{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:repeating-linear-gradient(60deg,#2FB8FF 0 1px,transparent 1px 64px);
}
.prep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.prep-item{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;transition:transform .24s,border-color .24s,box-shadow .24s}
.prep-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.prep-item .idx{font-family:var(--num);font-size:14px;color:var(--accent-300);letter-spacing:1.4px;display:block;margin-bottom:10px}
.prep-item h4{margin-bottom:8px}
.prep-item p{font-size:14.5px;color:var(--ink-3);margin-bottom:0}

/* 时间线 */
.timeline{position:relative;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,rgba(47,184,255,.55),rgba(47,184,255,.12));
}
.tl-item{position:relative;padding:0 0 34px 68px}
.tl-item:last-child{padding-bottom:0}
.tl-node{
  position:absolute;left:0;top:0;width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;font-family:var(--num);font-size:18px;color:var(--brand-500);
  background:rgba(47,184,255,.10);border:1px solid rgba(47,184,255,.35);
  box-shadow:0 0 0 6px rgba(5,10,20,.9);
}
.tl-item.is-key .tl-node{color:#160800;background:linear-gradient(135deg,#FF9A4D,#FF7A2F);border-color:transparent;box-shadow:0 0 0 6px rgba(5,10,20,.9),var(--glow-accent)}
.tl-body{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);padding:22px 24px;transition:border-color .24s,transform .24s,box-shadow .24s}
.tl-body:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--sh-2)}
.tl-body h3{margin-bottom:8px;font-size:19px}
.tl-body p{margin-bottom:10px;font-size:15.5px;color:var(--ink-2)}
.tl-body p:last-child{margin-bottom:0}
.tl-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--ink-3);margin-top:6px}
.tl-meta span{display:inline-flex;gap:6px;align-items:center}
.tl-meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-500)}

/* 提示框 */
.notice{
  display:flex;gap:16px;padding:22px 24px;border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--bg-2);align-items:flex-start;
}
.notice .ico{
  flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:700;
  font-family:var(--num);font-size:18px;
}
.notice h4{margin-bottom:6px}
.notice p{margin-bottom:0;font-size:15px;color:var(--ink-2)}
.notice--info{border-color:rgba(47,184,255,.30);background:rgba(47,184,255,.06)}
.notice--info .ico{color:var(--brand-500);background:rgba(47,184,255,.14)}
.notice--warn{border-color:rgba(255,122,47,.30);background:rgba(255,122,47,.06)}
.notice--warn .ico{color:var(--accent-500);background:rgba(255,122,47,.14)}

/* CTA 条 */
.cta-band{
  background:linear-gradient(120deg,rgba(11,111,184,.35),rgba(5,10,20,.2) 60%),var(--bg-1);
  border-top:1px solid rgba(120,200,255,.18);border-bottom:1px solid rgba(120,200,255,.18);
}
.cta-inner{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between}
.cta-inner h2{margin-bottom:8px}
.cta-inner p{margin-bottom:0;color:var(--ink-2);max-width:60ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand b{color:var(--ink-1);font-size:17px;font-weight:800}
.site-footer p{font-size:14.5px;color:var(--ink-3);max-width:44ch}
.site-footer h4{font-size:15px;color:var(--ink-1);margin-bottom:16px}
.footer-links,.footer-contact{list-style:none;padding:0;margin:0}
.footer-links li,.footer-contact li{margin-bottom:12px;font-size:14.5px;color:var(--ink-3)}
.footer-links a{color:var(--ink-2)}
.footer-links a:hover{color:var(--brand-500)}
.footer-contact b{color:var(--ink-2);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--line);padding:22px 0 30px;font-size:13.5px;color:var(--ink-3);
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;background:var(--glass-bg);border:1px solid var(--line-strong);
  color:var(--brand-500);cursor:pointer;z-index:1040;backdrop-filter:var(--glass-blur);
  opacity:0;pointer-events:none;transition:opacity .24s,transform .24s;
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-3px);box-shadow:var(--glow-brand)}
.to-top svg{width:18px;height:18px}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .45s cubic-bezier(.2,.7,.3,1),transform .45s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1199px){
  .container{padding:0 28px}
  .prep-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .page-hero{padding:130px 0 60px}
  .split,.split--rev{grid-template-columns:1fr;gap:34px}
  .split--rev .img-frame{order:-1}
  .kv-mini{grid-template-columns:repeat(3,1fr)}
  .nav-links{
    position:fixed;top:60px;left:0;right:0;bottom:0;flex-direction:column;align-items:stretch;
    gap:4px;padding:24px 24px 40px;margin:0;
    background:rgba(6,11,22,.97);backdrop-filter:var(--glass-blur);
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;
    overflow-y:auto;
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{min-height:48px;display:flex;align-items:center;font-size:16px;border-radius:12px}
  .nav-toggle{display:block}
  .nav-search{display:none}
  .nav-actions{margin-left:auto}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:48px 0}
  .page-hero{padding:118px 0 52px}
  .nav-actions .btn-main{display:none}
  .prep-grid{grid-template-columns:1fr}
  .kv-mini{grid-template-columns:1fr}
  .hero-stats{gap:12px}
  .hero-stats .stat{flex:1 1 100%}
  .tl-item{padding-left:58px}
  .tl-node{width:40px;height:40px;border-radius:12px;font-size:16px}
  .timeline::before{left:19px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .brand-text b{font-size:15px}
}
@media (max-width:519px){
  .card,.tl-body{padding:20px}
  .footer-bottom{font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --bg-0:#050A14;
  --bg-1:#0A1322;
  --bg-2:rgba(255,255,255,.045);
  --brand-500:#2FB8FF;
  --brand-700:#0B6FB8;
  --accent-500:#FF7A2F;
  --accent-300:#FFB020;
  --ink-1:#F2F7FF;
  --ink-2:#A9B8CE;
  --ink-3:#6F819A;
  --glass-bg:rgba(12,24,42,.55);
  --glass-border:rgba(120,200,255,.14);
  --line:rgba(255,255,255,.08);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 4px 18px rgba(0,0,0,.28);
  --sh-2:0 14px 34px rgba(0,0,0,.42);
  --sh-3:0 22px 60px rgba(0,0,0,.55);
  --glow-brand:0 0 0 1px rgba(47,184,255,.28),0 14px 44px rgba(47,184,255,.18);
  --glow-accent:0 8px 28px rgba(255,122,47,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--ink-2);
  --bs-link-color:var(--brand-500);
  --bs-link-hover-color:#7FD4FF;
  --bs-border-color:rgba(120,200,255,.14);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:72px;
  background:var(--bg-0);
  color:var(--ink-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;display:block;background:#0B1524}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease)}
a:hover{color:#7FD4FF}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink-1);line-height:1.3;font-weight:700}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:3px solid rgba(47,184,255,.6);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,184,255,.3);color:#fff}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ---------- 导航 ---------- */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 10px 30px rgba(0,0,0,.32);
  transition:background .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-nav.is-stuck{background:rgba(6,11,22,.94);box-shadow:0 14px 38px rgba(0,0,0,.5);border-bottom-color:rgba(120,200,255,.16)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .24s var(--ease)}
.site-nav.is-stuck .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;min-height:32px;text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 36px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#6FD3FF,#2FB8FF 45%,#0B6FB8);
  box-shadow:var(--glow-brand);
}
.brand-mark svg{width:22px;height:22px}
.brand-text b{display:block;font-size:16px;font-weight:800;color:var(--ink-1);letter-spacing:.2px;line-height:1.25}
.brand-text span{display:block;font-size:10px;letter-spacing:2.2px;color:var(--brand-500);font-weight:600}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:10px 14px;border-radius:var(--r-pill);
  color:var(--ink-2);font-size:15px;font-weight:500;white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-links a:hover{color:var(--ink-1);background:rgba(47,184,255,.10)}
.nav-links a.active{color:var(--ink-1);background:rgba(47,184,255,.14);box-shadow:inset 0 0 0 1px rgba(47,184,255,.3)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-search{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.05);
  box-shadow:inset 0 0 0 1px rgba(120,200,255,.16);
  color:var(--ink-2);font-size:14px;
}
.nav-search svg{width:16px;height:16px;color:var(--brand-500)}
.nav-search:hover{color:var(--ink-1);background:rgba(47,184,255,.12)}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border:0;border-radius:var(--r-pill);
  background:linear-gradient(135deg,#FFA05C,#FF7A2F 55%,#F0651A);
  color:#200D02;font-size:16px;font-weight:700;letter-spacing:.2px;
  box-shadow:var(--glow-accent);
  transition:transform .2s var(--ease),filter .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-main:hover{color:#200D02;transform:translateY(-1px);filter:brightness(1.07);box-shadow:0 12px 34px rgba(255,122,47,.45)}
.btn-main:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  background:transparent;color:var(--brand-500);
  box-shadow:inset 0 0 0 1px rgba(47,184,255,.45);
  font-size:16px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:rgba(47,184,255,.10);color:#8FDBFF;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid rgba(120,200,255,.22);border-radius:12px;
  background:rgba(255,255,255,.04);position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;top:50%;width:18px;height:2px;background:var(--ink-1);border-radius:2px;
  transform:translate(-50%,-50%);content:"";transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span::before{transform:translate(-50%,-6px)}
.nav-toggle span::after{transform:translate(-50%,6px)}
.site-nav.nav-open .nav-toggle span{background:transparent}
.site-nav.nav-open .nav-toggle span::before{transform:translate(-50%,0) rotate(45deg)}
.site-nav.nav-open .nav-toggle span::after{transform:translate(-50%,0) rotate(-45deg)}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  padding:52px 0 44px;
  background:
    linear-gradient(180deg,rgba(5,10,20,.74),rgba(5,10,20,.95)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid rgba(120,200,255,.12);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(47,184,255,.055) 0 2px,transparent 2px 26px);
  opacity:.85;
}
.page-head .container{position:relative;z-index:1}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);margin-bottom:18px}
.breadcrumb-x a{color:var(--ink-2)}
.breadcrumb-x a:hover{color:var(--brand-500)}
.breadcrumb-x .sep{color:rgba(120,200,255,.35)}
.breadcrumb-x em{font-style:normal;color:var(--brand-500)}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(47,184,255,.10);
  box-shadow:inset 0 0 0 1px rgba(47,184,255,.26);
  color:var(--brand-500);font-size:13px;font-weight:600;letter-spacing:.4px;
  margin-bottom:16px;
}
.kicker i{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block}
.page-head h1{
  font-size:clamp(26px,3.8vw,40px);
  font-weight:800;
  line-height:1.28;
  max-width:960px;
  letter-spacing:.2px;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;font-size:13.5px;color:var(--ink-3)}
.badge-cat{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:var(--r-pill);
  background:rgba(255,122,47,.14);color:var(--accent-300);
  box-shadow:inset 0 0 0 1px rgba(255,122,47,.32);
  font-size:12.5px;font-weight:600;
}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-item b{color:var(--ink-2);font-weight:500}

/* ---------- 正文区 ---------- */
.article-shell{padding:48px 0 0;background:linear-gradient(180deg,var(--bg-0),var(--bg-1) 60%,var(--bg-0))}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:40px;align-items:start;padding-bottom:64px}
.article-body{max-width:800px;min-width:0}
.article-card{
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--glass-border);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  padding:38px 40px 30px;
}
.rich-text>*:first-child{margin-top:0}
.rich-text p{color:var(--ink-2);font-size:16.5px;line-height:1.88;margin:0 0 17px}
.rich-text h2{
  font-size:clamp(20px,2.5vw,26px);font-weight:700;color:var(--ink-1);
  margin:36px 0 14px;padding-left:14px;border-left:3px solid var(--brand-500);line-height:1.4;
}
.rich-text h3{font-size:19px;font-weight:600;color:var(--ink-1);margin:26px 0 10px}
.rich-text h4{font-size:17px;font-weight:600;color:var(--brand-500);margin:20px 0 8px}
.rich-text ul,.rich-text ol{margin:0 0 18px;padding-left:22px}
.rich-text ul{list-style:disc}
.rich-text ol{list-style:decimal}
.rich-text li{color:var(--ink-2);line-height:1.82;margin-bottom:9px}
.rich-text li::marker{color:var(--brand-500)}
.rich-text strong{color:var(--ink-1)}
.rich-text a{color:var(--brand-500);text-decoration:underline;text-underline-offset:3px}
.rich-text a:hover{color:#8FDBFF}
.rich-text blockquote{
  margin:22px 0;padding:16px 20px;border-radius:var(--r-sm);
  border-left:3px solid var(--accent-500);
  background:rgba(255,122,47,.07);
  color:var(--ink-2);font-size:16px;line-height:1.8;
}
.rich-text blockquote p:last-child{margin-bottom:0}
.rich-text img{border-radius:var(--r-md);margin:22px auto;width:100%;box-shadow:var(--sh-1)}
.rich-text figure{margin:24px 0}
.rich-text figcaption{font-size:13.5px;color:var(--ink-3);text-align:center;margin-top:10px}
.rich-text table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;background:rgba(255,255,255,.02);border-radius:var(--r-sm);overflow:hidden}
.rich-text th,.rich-text td{border:1px solid rgba(120,200,255,.14);padding:11px 14px;text-align:left;color:var(--ink-2)}
.rich-text th{background:rgba(47,184,255,.10);color:var(--ink-1);font-weight:600}
.rich-text tr:hover td{background:rgba(47,184,255,.05)}
.rich-text hr{border:0;border-top:1px solid var(--line);margin:30px 0}
.rich-text code{background:rgba(47,184,255,.12);color:#9BE0FF;padding:2px 7px;border-radius:6px;font-size:14.5px}

.article-empty{text-align:center;padding:40px 10px 26px}
.article-empty h2{font-size:22px;margin-bottom:12px;justify-content:center}
.article-empty p{color:var(--ink-3);max-width:520px;margin:0 auto 22px}

/* ---------- 上下篇 ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;
  padding:18px 20px;border-radius:var(--r-md);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  color:var(--ink-2);font-size:15px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.post-nav a:hover{transform:translateY(-3px);border-color:rgba(47,184,255,.4);background:rgba(47,184,255,.08);color:var(--ink-1)}
.post-nav span{font-size:12.5px;color:var(--ink-3);letter-spacing:.4px}
.post-nav b{font-size:15.5px;color:var(--ink-1);font-weight:600}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--glass-border);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:22px;
}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:3px;height:15px;border-radius:2px;background:var(--accent-500)}
.side-list li+li{margin-top:4px}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:var(--r-sm);
  color:var(--ink-2);font-size:14.5px;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.side-list a:hover{background:rgba(47,184,255,.10);color:var(--ink-1);transform:translateX(2px)}
.side-list a::after{content:"›";color:var(--brand-500);font-size:16px}
.side-card p{font-size:14px;color:var(--ink-3);line-height:1.75;margin-bottom:14px}
.side-info{margin:0}
.side-info li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;font-size:14px;border-bottom:1px dashed rgba(120,200,255,.14)}
.side-info li:last-child{border-bottom:0}
.side-info span{color:var(--ink-3)}
.side-info b{color:var(--ink-1);font-weight:600;text-align:right}
.side-cta{background:linear-gradient(150deg,rgba(255,122,47,.16),rgba(12,24,42,.6));border-color:rgba(255,122,47,.3)}
.side-cta .btn-main{width:100%;margin-top:6px}

/* ---------- 相关推荐 ---------- */
.section{padding:78px 0}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:34px}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:700}
.sec-head p{margin:10px 0 0;color:var(--ink-3);font-size:14.5px;max-width:620px}
.sec-link{font-size:14.5px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.sec-link::after{content:"→";transition:transform .2s var(--ease)}
.sec-link:hover::after{transform:translateX(3px)}
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card-x{
  display:flex;flex-direction:column;
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card-x:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(47,184,255,.34)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0B1524}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card-x:hover .card-media img{transform:scale(1.03)}
.card-media .tag{
  position:absolute;left:12px;top:12px;
  padding:4px 11px;border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:rgba(6,11,22,.78);color:var(--brand-500);
  box-shadow:inset 0 0 0 1px rgba(47,184,255,.32);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600}
.card-x:hover .card-body h3{color:var(--brand-500)}
.card-body p{font-size:14.5px;color:var(--ink-3);line-height:1.75;margin:0;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;font-size:13px;color:var(--ink-3)}
.card-foot .more{color:var(--brand-500);font-weight:600}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:38px 40px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(255,122,47,.16),rgba(12,24,42,.72) 42%,rgba(47,184,255,.14));
  border:1px solid rgba(120,200,255,.2);
  box-shadow:var(--sh-2);
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:10px}
.cta-band p{margin:0;color:var(--ink-2);font-size:15px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:20px;background:var(--bg-1);border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand b{font-size:16px;color:var(--ink-1);font-weight:800}
.site-footer p{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:340px}
.site-footer h4{font-size:15px;color:var(--ink-1);margin-bottom:16px}
.footer-links li+li{margin-top:10px}
.footer-links a,.footer-contact li{font-size:14px;color:var(--ink-3)}
.footer-links a:hover{color:var(--brand-500)}
.footer-contact li{line-height:1.75;margin-bottom:10px}
.footer-contact b{color:var(--ink-2);font-weight:500}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3);
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(120,200,255,.28);
  background:rgba(10,19,34,.9);color:var(--brand-500);
  font-size:18px;line-height:1;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.back-top.is-show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:rgba(47,184,255,.16);color:#8FDBFF}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-links{
    position:fixed;left:0;right:0;top:72px;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:18px 20px 26px;
    background:rgba(6,11,22,.97);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--glass-border);
    transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease);
  }
  .site-nav.nav-open .nav-links{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{display:flex;align-items:center;min-height:48px;padding:12px 16px;font-size:16px;border-radius:var(--r-sm)}
  .nav-search{display:none}
  .article-layout{grid-template-columns:1fr}
  .article-side{position:static}
  .article-body{max-width:none}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:64px 0}
  .cta-band{padding:30px 26px}
}
@media (max-width:767px){
  body{padding-top:64px}
  .nav-inner{height:64px}
  .site-nav.is-stuck .nav-inner{height:58px}
  .nav-links{top:64px}
  .container{padding-left:20px;padding-right:20px}
  .brand-text b{font-size:15px}
  .page-head{padding:36px 0 32px}
  .article-card{padding:26px 20px 20px}
  .post-nav{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:52px 0}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1 1 auto}
}
@media (max-width:520px){
  .brand-text span{display:none}
  .nav-actions .btn-sm{display:none}
  .post-meta{font-size:13px;gap:8px 14px}
  .rich-text p{font-size:16px}
  .back-top{right:16px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --bg-0:#050A14;
  --bg-1:#0A1322;
  --bg-2:rgba(255,255,255,.045);
  --brand-500:#2FB8FF;
  --brand-700:#0B6FB8;
  --accent-500:#FF7A2F;
  --accent-300:#FFB020;
  --ink-1:#F2F7FF;
  --ink-2:#A9B8CE;
  --ink-3:#6F819A;
  --glass-bg:rgba(12,24,42,.55);
  --glass-border:rgba(120,200,255,.14);
  --line:rgba(255,255,255,.08);
  --glow-brand:0 0 0 1px rgba(47,184,255,.28),0 14px 44px rgba(47,184,255,.18);
  --glow-accent:0 8px 28px rgba(255,122,47,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(2,8,20,.45);
  --sh-2:0 14px 34px rgba(2,8,20,.55);
  --sh-3:0 26px 70px rgba(2,8,20,.65);
  --sp:8px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--ink-2);
  --bs-link-color:var(--brand-500);
  --bs-link-hover-color:#7FD3FF;
  --bs-border-color:rgba(255,255,255,.10);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
  background-image:
    linear-gradient(115deg,rgba(47,184,255,.05) 1px,transparent 1px),
    linear-gradient(115deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:220px 220px,220px 220px;
  background-position:0 0,110px 110px;
}
img{max-width:100%;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:#7FD3FF;}
h1,h2,h3,h4{color:var(--ink-1);margin:0 0 12px;font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(28px,4.6vw,52px);line-height:1.2;font-weight:800;}
h2{font-size:clamp(22px,3vw,34px);line-height:1.3;}
h3{font-size:19px;line-height:1.45;font-weight:600;}
p{margin:0 0 16px;max-width:74ch;}
ul,ol{margin:0 0 16px;padding-left:20px;}
li{margin-bottom:8px;}
::selection{background:rgba(47,184,255,.28);color:#fff;}
:focus-visible{outline:3px solid rgba(47,184,255,.65);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ============ 按钮 ============ */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.btn-main{
  color:#1A0A00;
  background:linear-gradient(135deg,#FF8F45 0%,var(--accent-500) 60%,#E9611A 100%);
  box-shadow:var(--glow-accent);
}
.btn-main:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 34px rgba(255,122,47,.45);color:#1A0A00;}
.btn-main:active{transform:translateY(1px);}
.btn-main[disabled],.btn-main.is-disabled{opacity:.45;box-shadow:none;pointer-events:none;}
.btn-ghost{
  color:var(--brand-500);
  border-color:rgba(47,184,255,.45);
  background:rgba(47,184,255,.05);
}
.btn-ghost:hover{background:rgba(47,184,255,.12);color:#9BDDFF;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}

/* ============ 导航 ============ */
.site-nav{
  position:absolute;top:0;left:0;right:0;z-index:1000;
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 30px rgba(2,8,20,.35);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-nav::after{
  content:"";position:absolute;inset:auto 0 -1px 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,184,255,.5),transparent);
  opacity:0;transition:opacity .25s var(--ease);
}
.site-nav.is-stuck{
  position:fixed;
  background:rgba(6,11,22,.94);
  box-shadow:0 16px 44px rgba(2,8,20,.7);
}
.site-nav.is-stuck::after{opacity:1;}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .25s var(--ease);}
.site-nav.is-stuck .nav-inner{height:60px;}
.brand{display:flex;align-items:center;gap:12px;min-height:32px;color:var(--ink-1);}
.brand:hover{color:var(--ink-1);}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex:0 0 38px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#7FD3FF,#2FB8FF 55%,#0B6FB8);
  box-shadow:0 8px 22px rgba(47,184,255,.28);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:16px;font-weight:800;letter-spacing:.3px;}
.brand-text span{font-size:10px;letter-spacing:2.2px;color:var(--ink-3);}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  display:inline-flex;align-items:center;height:44px;padding:0 14px;
  border-radius:var(--r-pill);font-size:15px;color:var(--ink-2);
  border:1px solid transparent;
}
.nav-links a:hover{color:var(--ink-1);background:rgba(47,184,255,.10);}
.nav-links a.active{
  color:#DFF2FF;background:rgba(47,184,255,.14);border-color:rgba(47,184,255,.32);
}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-search{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.12);
  color:var(--ink-2);font-size:14px;background:rgba(255,255,255,.04);
}
.nav-search svg{width:15px;height:15px;}
.nav-search:hover{color:var(--ink-1);border-color:rgba(47,184,255,.4);background:rgba(47,184,255,.10);}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;cursor:pointer;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--ink-1);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
body.nav-open .nav-toggle span{background:transparent;}
body.nav-open .nav-toggle span::before{transform:translateX(-50%) translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span::after{transform:translateX(-50%) translateY(-6px) rotate(-45deg);}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  padding:150px 0 88px;
  background-image:linear-gradient(100deg,rgba(5,10,20,.94) 12%,rgba(5,10,20,.72) 52%,rgba(5,10,20,.9) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(47,184,255,.06) 0 1px,transparent 1px 40px);
  opacity:.6;pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);margin-bottom:20px;}
.crumbs a{color:var(--ink-2);}
.crumbs a:hover{color:var(--brand-500);}
.crumbs span.sep{color:var(--ink-3);}
.crumbs .current{color:var(--brand-500);}
.badge-line{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.badge{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;
  border-radius:var(--r-pill);font-size:13px;color:#CFE9FF;
  background:rgba(47,184,255,.12);border:1px solid rgba(47,184,255,.30);
}
.badge.is-accent{color:#FFD6BC;background:rgba(255,122,47,.14);border-color:rgba(255,122,47,.34);}
.page-hero h1{max-width:22ch;}
.page-hero .lede{font-size:17px;color:var(--ink-2);max-width:64ch;margin-top:14px;}

/* ============ 板块 ============ */
.section{padding:96px 0;}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:70ch;margin-bottom:40px;}
.section-head .eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;color:var(--brand-500);
  text-transform:uppercase;margin-bottom:12px;
}
.section-head p{color:var(--ink-2);margin-bottom:0;}

/* ============ 参数表 ============ */
.spec-table{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--bg-2);overflow:hidden;box-shadow:var(--sh-1);
}
.spec-row{
  display:grid;grid-template-columns:minmax(180px,1fr) 2fr;
  gap:24px;padding:22px 28px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:nth-child(odd){background:rgba(255,255,255,.018);}
.spec-row:hover{background:rgba(47,184,255,.07);}
.spec-key{color:var(--ink-1);font-weight:600;font-size:15.5px;display:flex;align-items:baseline;gap:10px;}
.spec-key .dot{width:7px;height:7px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(47,184,255,.14);flex:0 0 7px;transform:translateY(-2px);}
.spec-val{color:var(--ink-2);font-size:15.5px;margin:0;}
.spec-val em{font-style:normal;color:var(--accent-300);font-weight:600;}

/* ============ 定义列表 ============ */
.term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.term-card{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:linear-gradient(160deg,rgba(47,184,255,.06),rgba(255,255,255,.02));
  padding:24px 26px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.term-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(47,184,255,.34);}
.term-card dt{color:var(--ink-1);font-size:18px;font-weight:700;margin-bottom:8px;}
.term-card dd{margin:0;color:var(--ink-2);font-size:15px;}

/* ============ 提示框 ============ */
.tip{
  display:flex;gap:16px;align-items:flex-start;
  border-radius:var(--r-md);padding:22px 26px;border:1px solid;margin-bottom:20px;
}
.tip-icon{
  flex:0 0 38px;width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;
}
.tip h3{margin-bottom:6px;font-size:17px;}
.tip p{margin:0;font-size:15px;}
.tip-info{background:rgba(47,184,255,.08);border-color:rgba(47,184,255,.30);}
.tip-info .tip-icon{background:rgba(47,184,255,.18);color:#BDE7FF;}
.tip-warn{background:rgba(255,122,47,.08);border-color:rgba(255,122,47,.32);}
.tip-warn .tip-icon{background:rgba(255,122,47,.18);color:#FFD2B4;}
.tip-warn h3{color:#FFCBA8;}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;}
.accordion-item{
  background:var(--bg-2);border:1px solid var(--line) !important;
  border-radius:var(--r-md) !important;margin-bottom:14px;overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.accordion-item:hover{border-color:rgba(47,184,255,.28) !important;}
.accordion-button{
  background:transparent !important;color:var(--ink-1) !important;
  font-size:16.5px;font-weight:600;padding:20px 56px 20px 22px;
  box-shadow:none !important;border-left:3px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.accordion-button::after{
  content:"";position:absolute;right:22px;top:50%;width:10px;height:10px;
  border-right:2px solid var(--brand-500);border-bottom:2px solid var(--brand-500);
  transform:translateY(-70%) rotate(45deg);transition:transform .22s var(--ease);
  background:none !important;margin:0;
}
.accordion-button:not(.collapsed){color:#E9F6FF !important;border-left-color:var(--accent-500);}
.accordion-button:not(.collapsed)::after{transform:translateY(-30%) rotate(-135deg);}
.accordion-button:focus{box-shadow:none !important;}
.accordion-body{
  padding:0 26px 22px 22px;color:var(--ink-2);font-size:15.5px;line-height:1.75;
  max-width:70ch;
}

/* ============ CTA 条 ============ */
.cta-band{
  border:1px solid var(--glass-border);border-radius:var(--r-lg);
  background:
    radial-gradient(120% 160% at 88% 10%,rgba(255,122,47,.16),transparent 55%),
    linear-gradient(120deg,rgba(11,111,184,.30),rgba(5,10,20,.6));
  box-shadow:var(--glow-brand);
  padding:44px 46px;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.cta-band h2{margin-bottom:8px;font-size:clamp(20px,2.4vw,28px);}
.cta-band p{margin:0;color:var(--ink-2);max-width:60ch;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line);
  padding:72px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand b{color:var(--ink-1);font-size:17px;font-weight:800;}
.site-footer p{color:var(--ink-3);font-size:14.5px;max-width:46ch;}
.site-footer h4{font-size:15px;color:var(--ink-1);margin-bottom:16px;letter-spacing:.5px;}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--ink-2);font-size:14.5px;}
.footer-links a:hover{color:var(--brand-500);text-decoration:underline;text-underline-offset:3px;}
.footer-contact{list-style:none;padding:0;margin:0;}
.footer-contact li{color:var(--ink-3);font-size:14px;margin-bottom:10px;}
.footer-contact b{color:var(--ink-2);font-weight:600;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--ink-3);font-size:13.5px;
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:900;
  width:48px;height:48px;border-radius:14px;cursor:pointer;
  border:1px solid rgba(47,184,255,.35);background:rgba(10,19,34,.86);
  color:var(--brand-500);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:rgba(47,184,255,.16);color:#9BDDFF;}
.to-top svg{width:18px;height:18px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 28px;}
  .nav-links a{padding:0 11px;font-size:14.5px;}
}
@media (max-width:991px){
  .section{padding:64px 0;}
  .page-hero{padding:126px 0 66px;}
  .spec-row{grid-template-columns:1fr;gap:8px;padding:20px 22px;}
  .term-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:34px 30px;}
  .nav-links,.nav-search{display:none;}
  .nav-toggle{display:block;}
  body.nav-open{overflow:hidden;}
  body.nav-open .nav-links{
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:990;
    padding:104px 24px 40px;
    background:rgba(6,11,22,.97);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    overflow-y:auto;
  }
  body.nav-open .nav-links a{
    height:52px;border-radius:14px;font-size:16px;padding:0 18px;
    background:rgba(255,255,255,.04);border:1px solid var(--line);
  }
  body.nav-open .nav-links a.active{background:rgba(47,184,255,.16);border-color:rgba(47,184,255,.36);}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:52px 0;}
  .page-hero{padding:118px 0 54px;}
  .brand-text b{font-size:15px;}
  .btn-main,.btn-ghost{width:100%;}
  .cta-actions{width:100%;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .accordion-button{font-size:15.5px;padding:18px 50px 18px 18px;}
}
@media (max-width:520px){
  .nav-actions .btn-sm{display:none;}
  .badge{font-size:12px;height:30px;padding:0 12px;}
  .spec-row{padding:18px 18px;}
  .term-card{padding:20px;}
  .cta-band{padding:26px 22px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category3 */
:root{
  --bg-0:#050A14;
  --bg-1:#0A1322;
  --bg-2:rgba(255,255,255,.045);
  --brand-500:#2FB8FF;
  --brand-700:#0B6FB8;
  --accent-500:#FF7A2F;
  --accent-300:#FFB020;
  --ink-1:#F2F7FF;
  --ink-2:#A9B8CE;
  --ink-3:#6F819A;
  --glass-bg:rgba(12,24,42,.55);
  --glass-border:rgba(120,200,255,.14);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(120,200,255,.22);
  --glow-brand:0 0 0 1px rgba(47,184,255,.28),0 14px 44px rgba(47,184,255,.18);
  --glow-accent:0 8px 28px rgba(255,122,47,.35);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sh-1:0 8px 24px rgba(2,8,20,.45);
  --sh-2:0 16px 40px rgba(2,8,20,.6);
  --sh-3:0 26px 70px rgba(2,8,20,.72);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--ink-2);
  --bs-link-color:var(--brand-500);
  --bs-link-hover-color:#7FD4FF;
  --bs-border-color:var(--line);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 82% -8%,rgba(47,184,255,.10),transparent 62%),
    radial-gradient(760px 480px at 6% 6%,rgba(255,122,47,.06),transparent 60%),
    var(--bg-0);
  color:var(--ink-2);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
a:hover{color:#8EDBFF;text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--ink-1);margin:0;font-weight:700;letter-spacing:.2px}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(47,184,255,.6);outline-offset:2px;border-radius:6px}
.container,.container-fluid{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 导航 ---------- */
.site-nav{
  position:absolute;
  top:0;left:0;right:0;
  z-index:60;
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 34px rgba(2,8,20,.45);
  transition:background-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-nav.is-stuck{
  position:fixed;
  background:rgba(6,11,22,.94);
  border-bottom-color:rgba(120,200,255,.16);
  box-shadow:0 14px 40px rgba(2,8,20,.7);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:72px;
  transition:min-height .25s var(--ease);
}
.site-nav.is-stuck .nav-inner{min-height:60px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(135deg,#55CCFF,#0B6FB8);
  box-shadow:var(--glow-brand);
}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{color:var(--ink-1);font-size:17px;font-weight:800;letter-spacing:.4px}
.brand-text span{color:var(--ink-3);font-size:10px;letter-spacing:2.4px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  display:inline-flex;align-items:center;
  height:40px;padding:0 14px;
  border-radius:var(--r-pill);
  color:var(--ink-2);
  font-size:15px;
  border:1px solid transparent;
  transition:all .2s var(--ease);
}
.nav-links a:hover{color:var(--ink-1);background:rgba(47,184,255,.10);border-color:var(--glass-border);text-decoration:none}
.nav-links a.active{
  color:#04131F;
  background:linear-gradient(135deg,#55CCFF,#2FB8FF);
  border-color:transparent;
  font-weight:700;
}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-search{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--glass-border);
  color:var(--ink-2);font-size:14px;
  background:rgba(255,255,255,.03);
}
.nav-search svg{width:16px;height:16px;color:var(--brand-500)}
.nav-search:hover{color:var(--ink-1);border-color:var(--line-strong);background:rgba(47,184,255,.10);text-decoration:none}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  padding:12px 26px;
  min-height:44px;
  border:none;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,#FF9A4D,#FF7A2F);
  color:#1A0A02;
  font-size:16px;font-weight:600;
  box-shadow:var(--glow-accent);
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
}
.btn-main:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 14px 36px rgba(255,122,47,.46);color:#1A0A02;text-decoration:none}
.btn-main:active{transform:translateY(1px)}
.btn-sm{padding:9px 20px;font-size:14px;min-height:40px}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  padding:12px 24px;
  min-height:44px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--brand-500);
  font-size:16px;font-weight:600;
  transition:all .2s var(--ease);
}
.btn-ghost:hover{background:rgba(47,184,255,.10);color:#9EDFFF;text-decoration:none;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--glass-border);
  border-radius:12px;
  background:rgba(255,255,255,.04);
  position:relative;
  cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;
  background:var(--ink-1);transform:translateX(-50%);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  padding:168px 0 78px;
  background-image:linear-gradient(180deg,rgba(5,10,20,.72),rgba(5,10,20,.94)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(120,200,255,.06) 0 1px,transparent 1px 76px);
  opacity:.5;
}
.page-head .container{position:relative;z-index:2}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin-bottom:20px;
}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand-500)}
.crumb span.sep{opacity:.5}
.crumb .cur{color:var(--ink-2)}
.badge-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--glass-border);
  background:rgba(47,184,255,.10);
  color:var(--brand-500);
  font-size:13px;font-weight:600;
  letter-spacing:.6px;
}
.page-head h1{
  font-size:clamp(28px,4.6vw,52px);
  line-height:1.2;
  font-weight:800;
  margin:18px 0 16px;
  max-width:19ch;
}
.page-head .lead{
  max-width:70ch;
  font-size:17px;
  color:var(--ink-2);
  margin-bottom:28px;
}
.head-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:76ch;margin-bottom:44px}
.section-head h2{font-size:clamp(22px,3vw,34px);line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--ink-2);margin:0}
.eyebrow{
  display:inline-block;
  color:var(--accent-300);
  font-size:13px;font-weight:700;letter-spacing:2px;
  text-transform:uppercase;
  margin-bottom:10px;
}

/* ---------- 卡片墙 ---------- */
.card-wall{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
}
.wall-card{
  grid-column:span 4;
  display:flex;flex-direction:column;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.wall-card:hover,
.wall-card:active{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--sh-2),var(--glow-brand);
}
.wall-6{grid-column:span 6}
.wall-5{grid-column:span 5}
.wall-4{grid-column:span 4}
.wall-3{grid-column:span 3}
.wall-7{grid-column:span 7}
.cover{
  position:relative;
  background:#081120;
  overflow:hidden;
}
.cover img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease);
}
.cover.ratio-169{aspect-ratio:16/9}
.cover.ratio-43{aspect-ratio:4/3}
.cover.ratio-11{aspect-ratio:1/1}
.cover.ratio-219{aspect-ratio:21/9}
.wall-card:hover .cover img{transform:scale(1.03)}
.cover .tagline{
  position:absolute;left:14px;top:14px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:rgba(6,11,22,.72);
  border:1px solid var(--glass-border);
  color:var(--brand-500);
  font-size:12px;font-weight:600;
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.wall-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1;gap:12px}
.wall-body h3{font-size:19px;line-height:1.45}
.wall-body p{font-size:15px;color:var(--ink-2);margin:0}
.wall-meta{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-top:auto;padding-top:8px;
  font-size:13px;color:var(--ink-3);
}
.wall-body .link-more{font-size:14px;font-weight:600}
.dot-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--ink-2);
  margin-bottom:8px;
}
.dot-list li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
  box-shadow:0 0 0 3px rgba(47,184,255,.14);
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:940px;margin:0 auto}
.accordion-item{
  background:var(--bg-2);
  border:1px solid var(--line) !important;
  border-radius:var(--r-md) !important;
  margin-bottom:14px;
  overflow:hidden;
}
.accordion-item+.accordion-item{margin-top:0}
.accordion-button{
  background:transparent !important;
  color:var(--ink-1) !important;
  font-size:17px;font-weight:600;
  padding:20px 56px 20px 22px;
  box-shadow:none !important;
  position:relative;
  border:none;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.accordion-button:hover{color:#9EDFFF !important;background:rgba(47,184,255,.06) !important}
.accordion-button::after{display:none}
.accordion-button::before{
  content:"";
  position:absolute;right:22px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--brand-500);
  border-bottom:2px solid var(--brand-500);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .22s var(--ease);
}
.accordion-button[aria-expanded="true"]{color:#9EDFFF !important}
.accordion-button[aria-expanded="true"]::before{transform:translateY(-30%) rotate(-135deg)}
.accordion-button:not(.collapsed){box-shadow:inset 3px 0 0 0 var(--accent-500)}
.accordion-body{
  padding:0 26px 24px 22px;
  color:var(--ink-2);
  font-size:15.5px;
  line-height:1.75;
  max-width:72ch;
}
.accordion-collapse{border-top:1px solid var(--line)}

/* ---------- 精简表单 ---------- */
.mini-form{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:32px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:38px;
  box-shadow:var(--sh-1);
}
.field{margin-bottom:18px}
.field label{
  display:block;
  font-size:14px;font-weight:600;color:var(--ink-1);
  margin-bottom:8px;
}
.field .control{
  width:100%;
  min-height:48px;
  padding:12px 16px;
  background:rgba(6,12,24,.65);
  border:1px solid var(--glass-border);
  border-radius:var(--r-sm);
  color:var(--ink-1);
  font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea.control{min-height:120px;resize:vertical}
.field .control::placeholder{color:var(--ink-3)}
.field .control:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(47,184,255,.22);
}
.field.error .control{border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,122,47,.18)}
.field .err-msg{display:none;color:var(--accent-500);font-size:13px;margin-top:6px}
.field.error .err-msg{display:block}
.form-side{border-left:1px solid var(--line);padding-left:32px}
.form-side h3{font-size:18px;margin-bottom:14px}
.side-list li{
  display:flex;gap:10px;
  font-size:14.5px;color:var(--ink-2);
  margin-bottom:14px;
}
.side-list li b{color:var(--ink-1);font-weight:600;display:block;font-size:14.5px}
.side-list .dot{
  flex:0 0 8px;height:8px;margin-top:9px;border-radius:50%;
  background:var(--brand-500);box-shadow:0 0 0 4px rgba(47,184,255,.12);
}
.form-note{font-size:13px;color:var(--ink-3);margin-top:14px}

/* ---------- CTA 条 ---------- */
.cta-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:24px;
  padding:32px 36px;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,184,255,.14),rgba(10,19,34,.9) 62%);
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px}
.cta-band p{margin:0;color:var(--ink-2);font-size:15px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:72px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:36px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand b{color:var(--ink-1);font-size:17px;font-weight:800}
.site-footer p{font-size:14.5px;color:var(--ink-3);max-width:44ch}
.site-footer h4{font-size:16px;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--ink-2);font-size:14.5px}
.footer-links a:hover{color:var(--brand-500)}
.footer-contact li{font-size:14.5px;color:var(--ink-3);margin-bottom:10px}
.footer-contact b{color:var(--ink-2);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:52px;padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}
.to-top{
  position:fixed;right:22px;bottom:24px;
  width:46px;height:46px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(6,12,24,.85);
  color:var(--brand-500);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:var(--sh-1);
  opacity:0;visibility:hidden;
  transform:translateY(8px);
  transition:all .22s var(--ease);
  z-index:70;cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:rgba(47,184,255,.16);text-decoration:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{padding-left:26px;padding-right:26px}
  .wall-3{grid-column:span 6}
}
@media (max-width:991.98px){
  .nav-toggle{display:block}
  .nav-links{
    position:fixed;
    inset:0;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:96px 24px 32px;
    background:rgba(6,11,22,.96);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    backdrop-filter:blur(18px) saturate(140%);
    transform:translateX(100%);
    transition:transform .26s var(--ease);
    overflow-y:auto;
    z-index:55;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-links a{height:48px;font-size:16px;border-radius:var(--r-sm)}
  .nav-search{display:none}
  .section{padding:64px 0}
  .page-head{padding:140px 0 62px}
  .card-wall{gap:18px}
  .wall-6,.wall-5,.wall-4,.wall-3,.wall-7{grid-column:span 6}
  .mini-form{grid-template-columns:1fr;padding:28px}
  .form-side{border-left:none;border-top:1px solid var(--line);padding-left:0;padding-top:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{padding:26px}
}
@media (max-width:575.98px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:48px 0}
  .page-head{padding:126px 0 48px}
  .brand-text b{font-size:15px}
  .brand-text span{letter-spacing:1.6px}
  .nav-actions .btn-main{padding:9px 16px;font-size:13px}
  .card-wall{grid-template-columns:1fr;gap:16px}
  .wall-6,.wall-5,.wall-4,.wall-3,.wall-7{grid-column:span 1}
  .wall-body{padding:18px 18px 22px}
  .footer-grid{grid-template-columns:1fr}
  .head-actions .btn-main,.head-actions .btn-ghost{width:100%}
  .cta-band{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .26s var(--ease),transform .26s var(--ease)}
.fade-up.in{opacity:1;transform:none}