/* roulang page: index */
:root{
  --bg:#070B14;
  --bg-deep:#050810;
  --panel:rgba(14,22,38,.72);
  --panel-solid:#0E1626;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#35E6D4;
  --brand-deep:#12B9A9;
  --lime:#C9F53C;
  --warn:#FF7A45;
  --ink:#E8F1F8;
  --ink-2:#93A7BA;
  --ink-3:#63768A;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-soft:0 10px 24px rgba(0,0,0,.32);
  --sidebar:248px;
  --maxw:1240px;
  --font:"PingFang SC","HarmonyOS Sans","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;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(1100px 560px at 82% -12%,rgba(53,230,212,.10),transparent 62%),
    radial-gradient(880px 520px at -6% 104%,rgba(201,245,60,.055),transparent 62%);
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--ink);text-decoration:none;line-height:inherit;transition:color .22s,border-color .22s,background-color .22s}
a:hover{color:var(--brand)}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit;font-size:inherit;line-height:1.4;border:0;background:none;color:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:16px;line-height:1.5;color:var(--ink)}
table{border-collapse:collapse;width:100%}

/* ============ 布局骨架 ============ */
.main-area{
  margin-left:var(--sidebar);
  min-height:100vh;
  position:relative;
  z-index:1;
}
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 32px;
}
.section{padding:64px 0}
.section-tight{padding:44px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:30px;
}
.section-head h2{
  font-size:clamp(24px,2.4vw,32px);
  font-weight:700;
  letter-spacing:-.3px;
  line-height:1.3;
}
.section-desc{
  margin-top:10px;
  color:var(--ink-2);
  font-size:15px;
  max-width:720px;
}
.link-more{
  flex:none;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
  border-bottom:1px solid rgba(53,230,212,.35);
  padding-bottom:2px;
  white-space:nowrap;
}
.link-more:hover{color:var(--lime);border-color:rgba(201,245,60,.6)}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar);
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:22px 16px 20px;
  background:linear-gradient(180deg,rgba(9,14,26,.97),rgba(7,11,20,.93));
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  z-index:60;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 10px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  transition:background .22s,border-color .22s;
}
.brand:hover{background:rgba(255,255,255,.045);border-color:var(--line)}
.brand-mark{
  width:36px;height:36px;flex:none;
  display:grid;place-items:center;
  color:var(--brand);
  border-radius:10px;
  border:1px solid rgba(53,230,212,.30);
  background:radial-gradient(circle at 30% 24%,rgba(53,230,212,.26),rgba(53,230,212,.03));
  box-shadow:0 0 0 1px rgba(255,255,255,.04) inset;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.4px;color:var(--ink)}
.brand-text:hover{color:var(--ink)}
.side-label{
  font-size:12px;
  letter-spacing:1.4px;
  color:var(--ink-3);
  padding:0 12px;
  text-transform:uppercase;
}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 14px 12px 18px;
  border-radius:var(--r-md);
  color:var(--ink-2);
  font-size:15px;
  font-weight:500;
  transition:background .22s,color .22s,transform .22s;
}
.nav-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:3px;height:0;
  transform:translateY(-50%);
  background:var(--brand);
  border-radius:3px;
  transition:height .22s;
}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--ink);transform:translateX(2px)}
.nav-link.is-active{color:var(--ink);background:rgba(53,230,212,.09)}
.nav-link.is-active::before{height:20px}
.nav-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ink-3);
  flex:none;
}
.nav-link.is-active .nav-dot{background:var(--brand);box-shadow:0 0 0 4px rgba(53,230,212,.16)}
.side-cta{margin-top:2px}
.side-cta .btn{width:100%}
.side-foot{
  margin-top:auto;
  padding:16px 14px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  font-size:13px;
  color:var(--ink-3);
  line-height:1.85;
}
.side-foot strong{display:block;color:var(--ink-2);font-size:13px;font-weight:600;margin-bottom:6px}
.side-foot a{color:var(--brand)}

/* ============ 顶部条与抽屉（移动端） ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:55;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:12px 18px;
  background:rgba(7,11,20,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.topbar .brand{padding:4px 6px}
.menu-toggle{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:var(--r-md);
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.03);
  transition:border-color .22s,transform .22s;
}
.menu-toggle:hover{border-color:var(--brand)}
.menu-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  border-radius:2px;
  position:relative;
}
.menu-toggle span::before,
.menu-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;
  background:var(--ink);
  border-radius:2px;
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(3,6,12,.72);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s,visibility .28s;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:280px;
  max-width:86vw;
  padding:20px 16px;
  display:flex;
  flex-direction:column;
  gap:18px;
  background:linear-gradient(180deg,#0A1120,#070B14);
  border-right:1px solid var(--line);
  transform:translateX(-102%);
  transition:transform .3s ease;
  z-index:80;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-close{
  align-self:flex-end;
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:var(--r-md);
  border:1px solid var(--line-strong);
  color:var(--ink-2);
  font-size:20px;
  line-height:1;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform .2s,box-shadow .26s,background .26s,border-color .26s,color .26s,filter .26s;
}
.btn-primary{
  background:linear-gradient(135deg,#3DEBD9,#12B9A9);
  color:#04201E;
  box-shadow:0 0 0 1px rgba(53,230,212,.5),0 10px 26px rgba(53,230,212,.26);
}
.btn-primary:hover{
  color:#04201E;
  transform:translateY(-2px);
  filter:brightness(1.07);
  box-shadow:0 0 0 1px rgba(53,230,212,.75),0 18px 36px rgba(53,230,212,.36);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:rgba(255,255,255,.03);
  border-color:var(--line-strong);
  color:var(--ink);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:3px;
}
.btn-sm{padding:10px 20px;font-size:14px}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--r-sm);
  font-size:12.5px;
  font-weight:500;
  color:var(--ink-2);
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.03);
  letter-spacing:.2px;
}
.badge-brand{color:var(--brand);border-color:rgba(53,230,212,.35);background:rgba(53,230,212,.08)}
.badge-lime{color:var(--lime);border-color:rgba(201,245,60,.32);background:rgba(201,245,60,.07)}
.badge-hot{color:var(--warn);border-color:rgba(255,122,69,.4);background:rgba(255,122,69,.1)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--brand);
  border:1px solid rgba(53,230,212,.28);
  background:rgba(53,230,212,.07);
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(53,230,212,.16);
}

/* ============ Hero ============ */
.hero{padding:62px 0 46px;position:relative}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:44px;
  align-items:center;
}
.hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.18;
  font-weight:700;
  letter-spacing:-.6px;
  margin:18px 0 20px;
}
.hero h1 em{
  font-style:normal;
  color:var(--brand);
  background:linear-gradient(transparent 62%,rgba(53,230,212,.22) 62%);
}
.hero-sub{
  color:var(--ink-2);
  font-size:17px;
  line-height:1.85;
  max-width:600px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin:30px 0 34px;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.stat-card{
  flex:1 1 150px;
  min-width:140px;
  padding:14px 18px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset;
}
.stat-num{
  font-size:24px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat-label{font-size:13px;color:var(--ink-3);margin-top:4px}

.portrait-card{
  position:relative;
  width:100%;
  max-width:340px;
  margin-left:auto;
  aspect-ratio:9/16;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--panel-solid);
  box-shadow:var(--shadow);
}
.portrait-card img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.portrait-card:hover img{transform:scale(1.03)}
.portrait-veil{
  position:absolute;
  inset:auto 0 0 0;
  height:58%;
  background:linear-gradient(to top,rgba(5,8,16,.94),rgba(5,8,16,.35) 52%,transparent);
  pointer-events:none;
}
.portrait-card figcaption{
  position:absolute;
  left:18px;right:18px;bottom:16px;
  font-size:14px;
  color:var(--ink);
  line-height:1.6;
}
.chip-time{
  position:absolute;
  right:14px;top:14px;
  padding:4px 10px;
  border-radius:var(--r-sm);
  font-size:12.5px;
  font-variant-numeric:tabular-nums;
  color:var(--ink);
  background:rgba(5,8,16,.72);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(8px);
}
.badge-num{
  position:absolute;
  left:14px;top:14px;
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  font-size:14px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:#0B1608;
  background:var(--lime);
  box-shadow:0 6px 18px rgba(201,245,60,.28);
}
.play-btn{
  position:absolute;
  left:50%;top:44%;
  transform:translate(-50%,-50%);
  width:58px;height:58px;
  display:grid;place-items:center;
  border-radius:50%;
  color:#04201E;
  background:rgba(53,230,212,.92);
  box-shadow:0 0 0 1px rgba(53,230,212,.7),0 12px 34px rgba(53,230,212,.4);
  transition:transform .22s,box-shadow .26s;
}
.play-btn::after{
  content:"";
  margin-left:3px;
  border-left:14px solid #04201E;
  border-top:9px solid transparent;
  border-bottom:9px solid transparent;
}
.play-btn:hover{transform:translate(-50%,-50%) scale(1.06);box-shadow:0 0 0 1px rgba(53,230,212,.85),0 16px 40px rgba(53,230,212,.5)}

/* ============ 横滑轨道 ============ */
.rail-wrap{position:relative}
.rail-wrap::before,
.rail-wrap::after{
  content:"";
  position:absolute;
  top:0;bottom:18px;
  width:56px;
  pointer-events:none;
  z-index:2;
}
.rail-wrap::before{left:0;background:linear-gradient(to right,var(--bg),rgba(7,11,20,0))}
.rail-wrap::after{right:0;background:linear-gradient(to left,var(--bg),rgba(7,11,20,0))}
.rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  padding:6px 4px 20px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:3px}
.rail::-webkit-scrollbar-thumb{background:rgba(53,230,212,.35);border-radius:3px}
.rail-item{
  flex:0 0 264px;
  scroll-snap-align:start;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  overflow:hidden;
  transition:transform .26s,border-color .26s,box-shadow .26s;
}
.rail-item:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-soft)}
.rail-media{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--panel-solid)}
.rail-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rail-item:hover .rail-media img{transform:scale(1.03)}
.rail-body{padding:16px 16px 18px}
.rail-title{
  font-size:16px;
  font-weight:600;
  line-height:1.55;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  min-height:3.1em;
}
.rail-foot{
  margin-top:12px;
  font-size:13px;
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}

/* ============ 清单 ============ */
.check-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px 32px;
}
.check-item{
  display:flex;
  align-items:flex-start;
  gap:20px;
  padding:20px 18px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  transition:background .24s,border-color .24s,transform .24s;
}
.check-item:hover{
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  transform:translateY(-2px);
}
.check-num{
  flex:none;
  font-size:32px;
  font-weight:700;
  line-height:1;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
  opacity:.9;
  letter-spacing:-1px;
}
.check-title{
  font-size:17px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:10px;
}
.check-arrow{
  color:var(--ink-3);
  font-size:15px;
  transition:transform .24s,color .24s;
}
.check-item:hover .check-arrow{transform:translateX(4px);color:var(--brand)}
.check-text{
  margin-top:6px;
  color:var(--ink-2);
  font-size:14.5px;
  line-height:1.8;
}

/* ============ 口碑条 ============ */
.voice{
  flex:0 0 320px;
  scroll-snap-align:start;
  display:flex;
  gap:14px;
  padding:18px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  transition:transform .26s,border-color .26s;
}
.voice:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.voice-avatar{
  width:44px;height:44px;flex:none;
  border-radius:50%;
  display:grid;place-items:center;
  font-size:15px;
  font-weight:700;
  color:var(--brand);
  border:1px solid rgba(53,230,212,.3);
  background:radial-gradient(circle at 32% 26%,rgba(53,230,212,.26),rgba(53,230,212,.04));
}
.voice-name{
  font-size:14px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:8px;
}
.voice-text{
  margin-top:6px;
  font-size:14.5px;
  color:var(--ink-2);
  line-height:1.8;
}
.stars{color:var(--lime);font-size:12px;letter-spacing:2px}

/* ============ 资讯列表 ============ */
.news-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.news-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  overflow:hidden;
  transition:transform .26s,border-color .26s,box-shadow .26s;
}
.news-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-soft)}
.news-thumb{
  display:block;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--panel-solid);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:12px;
}
.news-date{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.news-title{font-size:18px;font-weight:600;line-height:1.55}
.news-title a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-title a{color:var(--brand)}
.news-excerpt{
  margin-top:10px;
  font-size:14.5px;
  color:var(--ink-2);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-more{
  margin-top:16px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.news-more::after{content:"→";transition:transform .24s}
.news-card:hover .news-more::after{transform:translateX(4px)}
.empty-state{
  padding:52px 24px;
  text-align:center;
  border-radius:var(--r-lg);
  border:1px dashed var(--line-strong);
  background:rgba(255,255,255,.02);
}
.empty-icon{
  width:52px;height:52px;
  margin:0 auto 16px;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid rgba(53,230,212,.3);
  color:var(--brand);
  font-size:22px;
}
.empty-state p{color:var(--ink-2);font-size:15px}
.empty-actions{margin-top:20px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--panel);
  backdrop-filter:blur(14px);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .24s;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:rgba(53,230,212,.35)}
.faq-q{
  position:relative;
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 20px 18px 26px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
}
.faq-q::before{
  content:"";
  position:absolute;
  left:12px;top:50%;
  transform:translateY(-50%);
  width:3px;height:18px;
  border-radius:3px;
  background:var(--line-strong);
  transition:background .24s,height .24s;
}
.faq-item.is-open .faq-q::before{background:var(--brand);height:22px}
.faq-arrow{
  flex:none;
  width:22px;height:22px;
  display:grid;place-items:center;
  color:var(--ink-3);
  font-size:13px;
  transition:transform .26s,color .26s;
}
.faq-item.is-open .faq-arrow{transform:rotate(90deg);color:var(--brand)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a p{
  padding:0 24px 20px 26px;
  color:var(--ink-2);
  font-size:15px;
  line-height:1.9;
}

/* ============ CTA + 表单 ============ */
.cta-band{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:40px;
  padding:40px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    linear-gradient(125deg,rgba(53,230,212,.10),rgba(201,245,60,.045)),
    var(--panel);
  backdrop-filter:blur(14px);
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset;
}
.cta-band h2{font-size:clamp(23px,2.2vw,30px);font-weight:700;line-height:1.35}
.cta-band .cta-lead{margin-top:14px;color:var(--ink-2);font-size:15.5px;line-height:1.85}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-points li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  color:var(--ink-2);
}
.cta-points li::before{
  content:"";
  flex:none;
  width:7px;height:7px;
  margin-top:9px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 0 3px rgba(53,230,212,.14);
}
.form-panel{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(7,11,20,.6);
  padding:26px;
}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field label{font-size:13.5px;color:var(--ink-2);font-weight:500}
.field input,.field textarea{
  width:100%;
  padding:12px 14px;
  border-radius:var(--r-md);
  border:1px solid var(--line-strong);
  background:rgba(5,8,16,.72);
  color:var(--ink);
  transition:border-color .22s,box-shadow .22s,background .22s;
}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand);
  background:rgba(5,8,16,.9);
  box-shadow:0 0 0 4px rgba(53,230,212,.14);
}
.field textarea{min-height:110px;resize:vertical}
.form-privacy{font-size:12.5px;color:var(--ink-3);line-height:1.75;margin-top:14px}
.form-note{
  display:none;
  margin-bottom:16px;
  padding:12px 16px;
  border-radius:var(--r-md);
  font-size:14px;
  border:1px solid rgba(53,230,212,.4);
  background:rgba(53,230,212,.09);
  color:var(--brand);
}
.form-note.is-on{display:block}

/* ============ 页脚 ============ */
.site-foot{
  margin-top:72px;
  padding:52px 0 26px;
  border-top:1px solid var(--line);
  background:rgba(5,8,16,.62);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:34px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .brand-text{font-size:17px}
.foot-text{color:var(--ink-2);font-size:14.5px;line-height:1.85;max-width:340px}
.foot-col h3{
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:16px;
  letter-spacing:.4px;
}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{color:var(--ink-2);font-size:14.5px}
.foot-col a:hover{color:var(--brand)}
.foot-col li{color:var(--ink-2);font-size:14.5px}
.foot-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:var(--ink-3);
}
.foot-bottom a{color:var(--ink-3)}
.foot-bottom a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .check-list{grid-template-columns:1fr}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main-area{margin-left:0}
  .wrap{padding:0 22px}
  .hero{padding:34px 0 30px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .portrait-card{margin:0 auto;max-width:300px}
  .section{padding:48px 0}
  .cta-band{grid-template-columns:1fr;padding:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .news-list{grid-template-columns:1fr}
  .hero h1{font-size:clamp(26px,7vw,34px)}
  .hero-sub{font-size:16px}
  .rail-item{flex:0 0 240px}
  .voice{flex:0 0 280px}
  .rail-wrap::before,.rail-wrap::after{width:28px}
  .faq-q{font-size:15.5px;padding:16px 16px 16px 24px}
  .faq-a p{padding:0 18px 18px 24px}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{flex-direction:column}
  .stat-card{flex:1 1 auto}
  .rail-item{flex:0 0 78vw}
  .voice{flex:0 0 84vw}
  .foot-grid{grid-template-columns:1fr}
  .site-foot{padding:40px 0 22px}
  .cta-band{padding:22px}
  .form-panel{padding:20px}
  .news-body{padding:16px 16px 18px}
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root{
  --bg:#070B14;
  --bg-2:#0B1120;
  --panel:rgba(14,22,38,.72);
  --panel-2:rgba(14,22,38,.9);
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --txt:#E8F1F8;
  --txt-2:#93A7BA;
  --txt-3:#63768A;
  --main:#35E6D4;
  --main-deep:#1FB9AA;
  --lime:#C9F53C;
  --hot:#FF7A45;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --r-pill:999px;
  --sh:0 18px 40px rgba(0,0,0,.45);
  --sh-soft:0 10px 26px rgba(0,0,0,.32);
  --side-w:248px;
  --max:1240px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--txt);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 620px at 10% 6%,rgba(53,230,212,.10),transparent 62%),
    radial-gradient(720px 520px at 94% 90%,rgba(201,245,60,.055),transparent 64%),
    radial-gradient(1200px 900px at 50% 50%,transparent 42%,rgba(0,0,0,.6) 100%);
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--main);text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease;}
a:hover{color:#6BF3E4;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.2px;}
p{margin:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--main);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(53,230,212,.28);color:#fff;}

/* 覆盖 Foundation 默认视觉 */
body,button,input,textarea,select{font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;}
a:hover,a:focus{color:#6BF3E4;}
.reveal-overlay{background:rgba(4,7,13,.72);}
hr{border:0;border-top:1px solid var(--line);}

/* ============ 容器 ============ */
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ============ App Shell 布局 ============ */
.app-shell{position:relative;z-index:1;display:flex;min-height:100vh;}
.shell-main{flex:1 1 auto;min-width:0;margin-left:var(--side-w);}
.page{padding:34px 0 0;}

/* ============ 侧边导航 ============ */
.shell-side{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  z-index:60;display:flex;flex-direction:column;gap:20px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,rgba(11,17,32,.97),rgba(7,11,20,.97));
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px 16px;border-bottom:1px solid var(--line);}
.brand:hover .brand-text{color:var(--main);}
.brand-mark{width:36px;height:36px;flex:0 0 36px;color:var(--main);display:inline-flex;filter:drop-shadow(0 0 10px rgba(53,230,212,.35));}
.brand-mark svg{width:100%;height:100%;}
.brand-text{font-size:18px;font-weight:700;color:var(--txt);letter-spacing:.5px;transition:color .2s;}
.nav{display:flex;flex-direction:column;gap:6px;}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:11px 12px 11px 16px;border-radius:var(--r-md);
  color:var(--txt-2);font-size:15px;font-weight:500;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--txt);transform:translateX(2px);}
.nav-link.is-active{color:var(--txt);background:rgba(53,230,212,.09);}
.nav-link.is-active::before{
  content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--main);
  box-shadow:0 0 10px rgba(53,230,212,.7);
}
.nav-dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.55;flex:0 0 6px;}
.nav-link.is-active .nav-dot{background:var(--main);opacity:1;}
.side-cta{margin-top:2px;}
.side-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);color:var(--txt-3);font-size:13px;line-height:1.9;}
.side-foot-title{color:var(--txt-2);font-weight:600;font-size:13.5px;margin-bottom:6px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn-main{
  background:linear-gradient(135deg,#3FF0DD,#1FB9AA);color:#04120F;
  box-shadow:0 0 0 1px rgba(53,230,212,.55),0 10px 26px rgba(53,230,212,.24);
}
.btn-main:hover{transform:translateY(-2px);color:#04120F;box-shadow:0 0 0 1px rgba(53,230,212,.8),0 16px 34px rgba(53,230,212,.36);}
.btn-main:active{transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--txt);}
.btn-ghost:hover{border-color:rgba(53,230,212,.6);color:var(--main);background:rgba(53,230,212,.07);}
.btn-block{width:100%;}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ============ 移动端顶栏 ============ */
.shell-top{
  display:none;align-items:center;justify-content:space-between;gap:12px;
  position:sticky;top:0;z-index:55;
  padding:12px 18px;
  background:rgba(7,11,20,.94);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.burger{
  width:42px;height:42px;border-radius:var(--r-md);
  border:1px solid var(--line-2);display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,background .2s ease;
}
.burger:hover{border-color:rgba(53,230,212,.6);background:rgba(53,230,212,.07);}
.burger span{display:block;width:18px;height:2px;background:var(--txt);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--txt);border-radius:2px;}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.scrim{
  position:fixed;inset:0;z-index:58;background:rgba(4,7,13,.7);
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.scrim.is-on{opacity:1;visibility:visible;}

/* ============ 面包屑 ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-3);margin-bottom:18px;}
.crumb a{color:var(--txt-2);}
.crumb a:hover{color:var(--main);}
.crumb span.sep{color:var(--txt-3);opacity:.7;}
.crumb .cur{color:var(--txt-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章布局 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:34px;align-items:start;}
.article-head{margin-bottom:20px;}
.article-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:6px;font-size:12.5px;font-weight:600;
  color:var(--main);border:1px solid rgba(53,230,212,.3);background:rgba(53,230,212,.08);
  margin-bottom:14px;
}
.article-title{font-size:clamp(25px,3.3vw,40px);line-height:1.32;margin-bottom:16px;color:#fff;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;color:var(--txt-3);font-size:13.5px;}
.meta-item{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums;}
.meta-item b{color:var(--txt-2);font-weight:500;}
.article-cover{
  margin:0 0 32px;border-radius:var(--r-lg);overflow:hidden;position:relative;
  border:1px solid var(--line);box-shadow:var(--sh);
}
.article-cover::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 38%);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease;}
.article-cover:hover img{transform:scale(1.03);}

/* ============ 正文排版 ============ */
.article-body{max-width:700px;font-size:17px;line-height:1.9;color:#DCE7F0;}
.article-body>*+*{margin-top:1.05em;}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  position:relative;font-size:clamp(21px,2.3vw,27px);line-height:1.45;color:#fff;
  margin:2.1em 0 .85em;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--main),rgba(53,230,212,.15));
}
.article-body h3{font-size:20px;color:#fff;margin:1.8em 0 .7em;}
.article-body h4{font-size:17.5px;color:var(--txt);margin:1.5em 0 .6em;}
.article-body a{border-bottom:1px solid rgba(53,230,212,.4);}
.article-body a:hover{border-bottom-color:var(--main);}
.article-body strong{color:#fff;font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.35em;}
.article-body li{margin:.5em 0;}
.article-body li::marker{color:var(--main);}
.article-body blockquote{
  margin:1.5em 0;padding:16px 20px;border-left:3px solid var(--main);
  background:rgba(53,230,212,.06);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--txt-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-md);border:1px solid var(--line);margin:1.4em 0;width:100%;}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{font-size:13.5px;color:var(--txt-3);text-align:center;margin-top:.6em;}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;font-variant-numeric:tabular-nums;}
.article-body th{background:rgba(53,230,212,.07);color:#fff;font-weight:600;font-size:14px;}
.article-body tr:last-child td{border-bottom:0;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:#8FF3E7;
}
.article-body pre{
  background:rgba(9,14,26,.9);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;overflow-x:auto;margin:1.5em 0;
}
.article-body pre code{background:none;border:0;padding:0;color:#CFE6F2;}

/* 空态 */
.article-empty{
  border:1px dashed var(--line-2);border-radius:var(--r-lg);padding:46px 28px;text-align:center;
  background:var(--panel);backdrop-filter:blur(14px);max-width:700px;
}
.empty-icon{width:56px;height:56px;margin:0 auto 16px;color:var(--txt-3);}
.empty-icon svg{width:100%;height:100%;}
.article-empty h2{font-size:21px;color:#fff;margin-bottom:10px;}
.article-empty p{color:var(--txt-2);margin-bottom:22px;font-size:15px;}

/* ============ 侧栏 ============ */
.read-side{align-self:start;position:sticky;top:26px;display:grid;gap:18px;}
.side-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px 18px 20px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh);position:relative;
}
.side-card::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);pointer-events:none;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.side-title{font-size:14px;font-weight:600;color:var(--txt);display:flex;align-items:center;gap:8px;margin-bottom:12px;}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--main);display:inline-block;}
.toc-toggle{
  display:none;width:100%;text-align:left;color:var(--txt-2);font-size:13.5px;
  padding:8px 0 0;border-top:1px solid var(--line);margin-top:10px;
}
.toc-list{display:grid;gap:2px;max-height:60vh;overflow-y:auto;}
.toc-list a{
  display:block;padding:8px 10px;border-left:2px solid var(--line);
  color:var(--txt-2);font-size:13.5px;line-height:1.55;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a:hover,.toc-list a.is-current{color:var(--main);border-left-color:var(--main);background:rgba(53,230,212,.06);}
.toc-fallback{color:var(--txt-3);font-size:13.5px;line-height:1.8;}
.side-links{display:grid;gap:10px;}
.side-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border:1px solid var(--line);border-radius:var(--r-md);
  color:var(--txt-2);font-size:14px;background:rgba(255,255,255,.02);
  transition:border-color .2s ease,color .2s ease,transform .2s ease,background .2s ease;
}
.side-link:hover{border-color:rgba(53,230,212,.5);color:var(--main);background:rgba(53,230,212,.06);transform:translateY(-2px);}
.side-link .arrow{color:var(--main);font-size:15px;}
.side-note{color:var(--txt-3);font-size:13px;line-height:1.85;}

/* ============ 相关推荐 ============ */
.relate{margin-top:52px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px;}
.section-title{font-size:clamp(20px,2.2vw,24px);color:#fff;}
.section-desc{color:var(--txt-3);font-size:13.5px;}
.relate-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.relate-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  backdrop-filter:blur(14px);box-shadow:var(--sh-soft);
  transition:transform .25s ease,border-color .25s ease;
}
.relate-card:hover{transform:translateY(-3px);border-color:rgba(53,230,212,.42);}
.relate-thumb{overflow:hidden;aspect-ratio:16/10;}
.relate-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.relate-card:hover .relate-thumb img{transform:scale(1.04);}
.relate-body{padding:16px 18px 18px;display:grid;gap:9px;}
.relate-body h3{font-size:16.5px;color:var(--txt);line-height:1.5;}
.relate-card:hover .relate-body h3{color:var(--main);}
.relate-body p{color:var(--txt-3);font-size:13.5px;line-height:1.75;}
.relate-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--txt-3);}
.badge{
  display:inline-flex;align-items:center;padding:3px 9px;border-radius:6px;font-size:12px;font-weight:600;
  border:1px solid rgba(53,230,212,.28);background:rgba(53,230,212,.08);color:var(--main);
}
.badge-lime{border-color:rgba(201,245,60,.28);background:rgba(201,245,60,.09);color:var(--lime);}
.badge-hot{border-color:rgba(255,122,69,.32);background:rgba(255,122,69,.1);color:var(--hot);}
.back-row{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap;}

/* ============ CTA 带 ============ */
.cta-band{
  margin:56px 0 30px;padding:34px 32px;border-radius:var(--r-lg);
  border:1px solid rgba(53,230,212,.22);
  background:linear-gradient(135deg,rgba(53,230,212,.11),rgba(201,245,60,.045) 60%,rgba(14,22,38,.6));
  backdrop-filter:blur(14px);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.3vw,26px);color:#fff;margin-bottom:10px;}
.cta-band p{color:var(--txt-2);font-size:15px;max-width:60ch;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-foot{
  border-top:1px solid var(--line);margin-top:30px;padding:46px 0 26px;
  background:linear-gradient(180deg,rgba(11,17,32,.45),rgba(7,11,20,.92));
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.05fr;gap:30px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-text{color:var(--txt-3);font-size:13.5px;line-height:1.85;max-width:36ch;}
.foot-col h3{font-size:14px;color:var(--txt);margin-bottom:14px;font-weight:600;}
.foot-col ul{list-style:none;display:grid;gap:9px;}
.foot-col a,.foot-col li{color:var(--txt-2);font-size:13.5px;}
.foot-col a:hover{color:var(--main);}
.foot-bottom{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  color:var(--txt-3);font-size:12.5px;
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:26px;}
  .read-side{position:static;top:auto;}
  .toc-toggle{display:block;}
  .toc-box .toc-list,.toc-box .toc-fallback{display:none;}
  .toc-box.is-open .toc-list,.toc-box.is-open .toc-fallback{display:grid;}
  .relate-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .shell-side{transform:translateX(-100%);box-shadow:0 20px 60px rgba(0,0,0,.6);}
  .shell-side.is-open{transform:translateX(0);}
  .shell-main{margin-left:0;}
  .shell-top{display:flex;}
  .page{padding-top:22px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px;}
}
@media (max-width:768px){
  .wrap{padding:0 16px;}
  .article-title{font-size:clamp(23px,5.6vw,30px);}
  .article-body{font-size:16.5px;line-height:1.85;}
  .article-body h2{font-size:21px;}
  .article-body h3{font-size:18.5px;}
  .relate-grid{grid-template-columns:1fr;}
  .cta-band{padding:26px 22px;}
  .cta-actions .btn{flex:1 1 auto;}
  .foot-grid{grid-template-columns:1fr;gap:24px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .article-meta{gap:6px 12px;}
  .article-cover{margin-bottom:24px;border-radius:var(--r-md);}
  .btn{padding:11px 18px;font-size:14.5px;}
  .back-row .btn{width:100%;}
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root{
  --bg:#070B14;
  --bg-soft:#0B1220;
  --panel:rgba(14,22,38,.72);
  --panel-solid:#0E1626;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#35E6D4;
  --primary-soft:rgba(53,230,212,.14);
  --accent:#C9F53C;
  --hot:#FF7A45;
  --t1:#E8F1F8;
  --t2:#93A7BA;
  --t3:#63768A;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --sh:0 18px 40px rgba(0,0,0,.45);
  --side-w:248px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ========== 基础 reset ========== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--t1);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 10% -12%, rgba(53,230,212,.10), transparent 62%),
    radial-gradient(720px 420px at 104% 2%, rgba(201,245,60,.055), transparent 58%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px);
  background-size:24px 24px;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease);}
p{margin:0 0 14px;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.2px;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
button,input,textarea,select{font:inherit;color:inherit;}
strong{color:var(--t1);font-weight:600;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
::selection{background:rgba(53,230,212,.28);color:#fff;}

/* ========== 布局骨架 ========== */
.app-shell{position:relative;z-index:1;min-height:100vh;}
.main-wrap{position:relative;z-index:1;margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column;}
.main{flex:1;width:100%;max-width:1240px;margin:0 auto;padding:36px 32px 24px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}
.section{margin-top:56px;}
.section-head{margin-bottom:24px;}
.section-head h2{font-size:clamp(24px,2.4vw,32px);}
.section-head p{margin-top:10px;color:var(--t2);font-size:15px;max-width:760px;}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:1.6px;text-transform:uppercase;
  color:var(--primary);background:var(--primary-soft);border:1px solid rgba(53,230,212,.28);
  border-radius:999px;padding:5px 14px;margin-bottom:16px;
}

/* ========== 左侧 App Shell 导航 ========== */
.side{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:40;
  background:rgba(7,11,20,.86);
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  display:flex;flex-direction:column;
  padding:26px 18px 22px;
}
.side-inner{display:flex;flex-direction:column;height:100%;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{display:inline-flex;width:30px;height:30px;color:var(--primary);flex:none;}
.brand-mark svg{width:100%;height:100%;display:block;}
.brand-text{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.4px;}
.nav{display:flex;flex-direction:column;gap:6px;margin:26px 0 22px;}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:11px 14px;border-radius:var(--r-md);
  color:var(--t2);font-size:15px;font-weight:500;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.nav-dot{width:6px;height:6px;border-radius:50%;background:var(--t3);flex:none;transition:background .22s,box-shadow .22s;}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--t1);transform:translateX(2px);}
.nav-link.is-active{color:var(--t1);background:rgba(53,230,212,.10);}
.nav-link.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);
}
.nav-link.is-active .nav-dot{background:var(--primary);box-shadow:0 0 10px rgba(53,230,212,.85);}
.side-cta{margin-top:auto;display:flex;flex-direction:column;gap:18px;}
.side-foot{
  border-top:1px solid var(--line);padding-top:16px;font-size:13px;color:var(--t3);line-height:1.7;
}
.side-foot b{display:block;color:var(--t2);font-weight:600;font-size:13px;margin-bottom:4px;}

/* ========== 顶部移动栏 ========== */
.topbar{
  display:none;position:sticky;top:0;z-index:50;
  align-items:center;justify-content:space-between;gap:12px;
  padding:12px 18px;
  background:rgba(7,11,20,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.burger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  background:rgba(255,255,255,.03);display:inline-flex;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:border-color .22s,background .22s;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t1);transition:transform .3s var(--ease),opacity .3s;}
.burger:hover{border-color:rgba(53,230,212,.6);background:rgba(53,230,212,.08);}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-mask{
  position:fixed;inset:0;z-index:45;background:rgba(3,6,12,.72);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.nav-mask.is-visible{opacity:1;visibility:visible;}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#3FEFDD,#17BFB4);
  color:#04201F;
  box-shadow:0 0 0 1px rgba(53,230,212,.55), 0 10px 30px rgba(53,230,212,.22);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(53,230,212,.85), 0 18px 42px rgba(53,230,212,.34);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--t1);border-color:var(--line-strong);}
.btn-ghost:hover{border-color:rgba(53,230,212,.62);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ========== 页头标题带 ========== */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:20px;}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--primary);}
.crumb span.sep{opacity:.5;}
.page-head{
  position:relative;overflow:hidden;
  padding:44px 40px 40px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh), inset 0 1px 0 rgba(255,255,255,.05);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(90deg, rgba(7,11,20,.94) 0%, rgba(7,11,20,.78) 46%, rgba(7,11,20,.32) 100%),
    url("/assets/images/backpic/back-1.webp") right center / cover no-repeat;
  opacity:.85;
}
.page-head > *{position:relative;z-index:2;}
.page-head h1{font-size:clamp(30px,3.6vw,54px);margin:6px 0 16px;}
.page-head .lead{color:var(--t2);font-size:16.5px;max-width:760px;line-height:1.85;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:999px;font-size:13px;
  color:var(--t2);background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.tag.is-hot{color:var(--hot);border-color:rgba(255,122,69,.35);background:rgba(255,122,69,.08);}
.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:30px;}
.stat{
  padding:18px 20px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(7,11,20,.55);
}
.stat b{display:block;font-size:30px;line-height:1.1;color:var(--primary);font-variant-numeric:tabular-nums;}
.stat span{display:block;margin-top:6px;font-size:13.5px;color:var(--t3);}
.stat:nth-child(2) b{color:var(--accent);}

/* ========== 两栏主体 ========== */
.layout-2{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:24px;align-items:start;}
.entry-list{display:flex;flex-direction:column;gap:18px;}
.entry{
  display:grid;grid-template-columns:196px minmax(0,1fr);gap:20px;
  padding:18px;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.entry:hover{transform:translateY(-2px);border-color:rgba(53,230,212,.35);box-shadow:var(--sh);}
.entry:hover h3{color:var(--primary);}
.entry-media{
  position:relative;border-radius:var(--r-md);overflow:hidden;aspect-ratio:4/3;
  background:var(--bg-soft);border:1px solid var(--line);
}
.entry-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.entry:hover .entry-media img{transform:scale(1.03);}
.entry-step{
  position:absolute;left:10px;top:10px;z-index:2;
  min-width:30px;padding:3px 8px;border-radius:var(--r-sm);
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
  color:var(--accent);background:rgba(7,11,20,.78);border:1px solid rgba(201,245,60,.35);
}
.entry-body{display:flex;flex-direction:column;gap:10px;}
.entry-body h3{font-size:20px;transition:color .22s var(--ease);}
.entry-body p{color:var(--t2);font-size:15px;margin:0;}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--t3);}
.badge{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-sm);
  font-size:12.5px;color:var(--primary);background:var(--primary-soft);border:1px solid rgba(53,230,212,.26);
}
.badge.badge-accent{color:var(--accent);background:rgba(201,245,60,.1);border-color:rgba(201,245,60,.3);}
.link-more{
  display:inline-flex;align-items:center;gap:6px;margin-top:2px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.link-more i{font-style:normal;transition:transform .25s var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* ========== 右栏信息卡 ========== */
.side-col{display:flex;flex-direction:column;gap:20px;position:sticky;top:24px;}
.panel{
  padding:22px;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.panel h3{font-size:18px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.panel h3::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--primary);}
.panel-accent{border-color:rgba(53,230,212,.28);background:linear-gradient(180deg,rgba(53,230,212,.08),transparent 62%),var(--panel);}
.point-list li{
  display:flex;gap:11px;padding:11px 0;font-size:14.5px;color:var(--t2);
  border-bottom:1px dashed rgba(255,255,255,.07);
}
.point-list li:last-child{border-bottom:0;padding-bottom:0;}
.point-list li .num{
  flex:none;width:22px;height:22px;border-radius:50%;margin-top:3px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:var(--accent);
  background:rgba(201,245,60,.1);border:1px solid rgba(201,245,60,.3);
  font-variant-numeric:tabular-nums;
}
.quick{display:flex;flex-direction:column;gap:10px;}
.quick a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:var(--r-md);font-size:14.5px;color:var(--t2);
  background:rgba(255,255,255,.03);border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.quick a:hover{background:rgba(53,230,212,.09);border-color:rgba(53,230,212,.35);color:var(--primary);}
.quick a i{font-style:normal;opacity:.7;}
.panel p.small{font-size:13.5px;color:var(--t3);margin:0 0 14px;}

/* ========== 对比面板 ========== */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.compare-card{
  padding:24px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--panel);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.compare-card h3{font-size:19px;margin-bottom:12px;}
.compare-card p{color:var(--t2);font-size:15px;margin:0 0 14px;}
.compare-card ul{display:flex;flex-direction:column;gap:9px;}
.compare-card li{position:relative;padding-left:18px;font-size:14.5px;color:var(--t2);}
.compare-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--t3);}
.compare-card.is-warn{border-color:rgba(255,122,69,.3);background:linear-gradient(180deg,rgba(255,122,69,.09),transparent 60%),var(--panel);}
.compare-card.is-warn li::before{background:var(--hot);}
.compare-card.is-good{border-color:rgba(53,230,212,.3);background:linear-gradient(180deg,rgba(53,230,212,.09),transparent 60%),var(--panel);}
.compare-card.is-good li::before{background:var(--primary);}

/* ========== FAQ ========== */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--panel);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  overflow:hidden;transition:border-color .25s var(--ease);
}
.faq-item[open]{border-color:rgba(53,230,212,.32);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
  padding:18px 20px;font-size:16.5px;font-weight:600;color:var(--t1);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";flex:none;width:3px;height:20px;border-radius:2px;background:var(--t3);
  transition:background .25s var(--ease);
}
.faq-item[open] summary{color:var(--primary);}
.faq-item[open] summary::before{background:var(--primary);}
.faq-arrow{
  margin-left:auto;flex:none;width:16px;height:16px;color:var(--t3);
  transition:transform .3s var(--ease),color .25s var(--ease);
}
.faq-item[open] .faq-arrow{transform:rotate(90deg);color:var(--primary);}
.faq-a{padding:0 20px 20px 37px;color:var(--t2);font-size:15px;line-height:1.9;}

/* ========== CTA 与表单 ========== */
.cta-band{
  position:relative;overflow:hidden;
  padding:44px 40px;border-radius:var(--r-lg);
  border:1px solid rgba(53,230,212,.24);
  background:
    radial-gradient(760px 320px at 88% -10%, rgba(53,230,212,.16), transparent 62%),
    radial-gradient(520px 260px at 4% 110%, rgba(201,245,60,.07), transparent 60%),
    var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh);
}
.cta-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:36px;align-items:start;}
.cta-band h2{font-size:clamp(24px,2.5vw,32px);margin-bottom:14px;}
.cta-band p{color:var(--t2);font-size:15.5px;}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:22px;}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);}
.cta-points .tick{
  flex:none;width:20px;height:20px;border-radius:50%;margin-top:3px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--primary);background:var(--primary-soft);border:1px solid rgba(53,230,212,.3);
  font-size:12px;font-weight:700;
}
.cta-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13.5px;color:var(--t2);}
.field input,.field textarea{
  width:100%;background:rgba(7,11,20,.72);
  border:1px solid var(--line);border-radius:var(--r-md);
  padding:12px 14px;font-size:15px;color:var(--t1);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:rgba(7,11,20,.9);
  box-shadow:0 0 0 3px rgba(53,230,212,.16);
}
.field textarea{min-height:112px;resize:vertical;line-height:1.7;}
.full{grid-column:1 / -1;}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px;justify-content:space-between;}
.form-note{font-size:13px;color:var(--t3);max-width:340px;line-height:1.7;}
.notice{
  display:none;margin-top:4px;padding:12px 16px;border-radius:var(--r-md);font-size:14px;
}
.notice.is-visible{display:block;}
.notice.is-ok{color:var(--primary);background:rgba(53,230,212,.1);border:1px solid rgba(53,230,212,.32);}
.notice.is-err{color:var(--hot);background:rgba(255,122,69,.1);border:1px solid rgba(255,122,69,.34);}

/* ========== 页脚 ========== */
.site-foot{
  margin-top:64px;border-top:1px solid var(--line);
  background:rgba(6,10,18,.9);
  padding:48px 0 24px;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--primary);margin-bottom:14px;}
.foot-text{font-size:14px;color:var(--t2);margin:0;max-width:340px;line-height:1.8;}
.foot-col h3{font-size:15px;color:var(--t1);margin-bottom:14px;}
.foot-col ul{display:flex;flex-direction:column;gap:10px;}
.foot-col li{font-size:14px;color:var(--t3);}
.foot-col a{color:var(--t2);font-size:14px;}
.foot-col a:hover{color:var(--primary);}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}

/* ========== 响应式 ========== */
@media (max-width:1024px){
  .topbar{display:flex;}
  .side{
    width:286px;transform:translateX(-102%);
    transition:transform .32s var(--ease);
    box-shadow:0 24px 60px rgba(0,0,0,.6);
  }
  .side.is-open{transform:translateX(0);}
  .main-wrap{margin-left:0;}
  .main{padding:28px 20px 16px;}
  .wrap{padding:0 20px;}
  .layout-2{grid-template-columns:minmax(0,1fr);}
  .side-col{position:static;}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
}
@media (max-width:768px){
  .page-head{padding:32px 24px 28px;}
  .stat-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
  .stat{padding:14px 16px;}
  .stat b{font-size:24px;}
  .entry{grid-template-columns:160px minmax(0,1fr);gap:16px;padding:16px;}
  .entry-body h3{font-size:18px;}
  .compare{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:32px 24px;}
}
@media (max-width:640px){
  body{font-size:15.5px;}
  .main{padding:20px 16px 12px;}
  .wrap{padding:0 16px;}
  .section{margin-top:44px;}
  .entry{grid-template-columns:minmax(0,1fr);}
  .entry-media{aspect-ratio:16/9;}
  .stat-row{grid-template-columns:minmax(0,1fr);}
  .cta-form{grid-template-columns:minmax(0,1fr);}
  .foot-grid{grid-template-columns:minmax(0,1fr);}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
  .faq-a{padding:0 18px 18px 34px;}
}

/* roulang page: category2 */
:root{
  --bg:#070B14;
  --bg-2:#0A1120;
  --panel:rgba(14,22,38,.72);
  --panel-solid:#0C1424;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --main:#35E6D4;
  --main-deep:#1FB6A8;
  --accent:#C9F53C;
  --hot:#FF7A45;
  --t1:#E8F1F8;
  --t2:#93A7BA;
  --t3:#63768A;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-pill:999px;
  --sh:0 18px 40px rgba(0,0,0,.45);
  --sh-soft:0 10px 26px rgba(0,0,0,.30);
  --gap:24px;
  --nav-w:252px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--t1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 520px at 12% -10%,rgba(53,230,212,.10),transparent 65%),
    radial-gradient(760px 460px at 100% 8%,rgba(201,245,60,.06),transparent 62%),
    radial-gradient(700px 700px at 50% 120%,rgba(0,0,0,.55),transparent 70%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .22s ease}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--main);outline-offset:2px;border-radius:var(--r-sm)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.32;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{background:none;border:0;cursor:pointer;font:inherit;color:inherit}
.number,.stat-num,.step-index,.foot-bottom,.badge{font-variant-numeric:tabular-nums}

/* ============ 布局骨架 ============ */
.app-shell{position:relative;z-index:1;display:block;min-height:100vh}
.side-nav{
  position:fixed;
  top:0;
  left:0;
  width:var(--nav-w);
  height:100vh;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,rgba(10,16,30,.92),rgba(8,13,25,.88));
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  display:flex;
  flex-direction:column;
  gap:22px;
  z-index:80;
  overflow-y:auto;
}
.app-main{
  margin-left:var(--nav-w);
  width:calc(100% - var(--nav-w));
  min-height:100vh;
  position:relative;
  z-index:1;
}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:62px 0}
.section-tight{padding:44px 0}

/* ============ 品牌 ============ */
.brand{display:flex;align-items:center;gap:11px;padding:4px 6px 14px}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  color:var(--main);
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(53,230,212,.08);
  border:1px solid rgba(53,230,212,.22);
  border-radius:var(--r-md);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.brand-mark svg{width:24px;height:24px}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.6px;color:var(--t1)}
.brand-sub{display:block;font-size:12px;color:var(--t3);letter-spacing:.4px;margin-top:1px}

/* ============ 侧栏导航 ============ */
.nav{display:flex;flex-direction:column;gap:6px}
.nav-title{font-size:12px;color:var(--t3);letter-spacing:1.4px;padding:0 10px 6px}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 12px;
  border-radius:var(--r-md);
  color:var(--t2);
  font-size:15px;
  border:1px solid transparent;
  transition:background .22s ease,color .22s ease,transform .22s ease,border-color .22s ease;
}
.nav-link .nav-dot{
  width:6px;height:6px;border-radius:50%;
  background:rgba(255,255,255,.22);
  flex:0 0 6px;
  transition:background .22s ease,box-shadow .22s ease;
}
.nav-link:hover{background:rgba(255,255,255,.05);color:var(--t1);transform:translateX(2px)}
.nav-link.is-active{
  color:var(--t1);
  background:linear-gradient(90deg,rgba(53,230,212,.14),rgba(53,230,212,.02));
  border-color:rgba(53,230,212,.22);
}
.nav-link.is-active::before{
  content:"";
  position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;
  background:var(--main);
  box-shadow:0 0 12px rgba(53,230,212,.7);
}
.nav-link.is-active .nav-dot{background:var(--accent);box-shadow:0 0 10px rgba(201,245,60,.8)}
.side-cta{
  display:block;text-align:center;
  padding:12px 14px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:#04211F;
  background:linear-gradient(135deg,#4DF0DE,#22C8B8);
  box-shadow:0 0 0 1px rgba(53,230,212,.5),0 12px 30px rgba(53,230,212,.24);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.side-cta:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,230,212,.7),0 18px 38px rgba(53,230,212,.34)}
.side-cta:active{transform:translateY(0)}
.side-foot{margin-top:auto;padding:16px 10px 0;border-top:1px solid var(--line);font-size:12.5px;color:var(--t3);line-height:1.9}
.side-foot strong{display:block;color:var(--t2);font-weight:600;margin-bottom:4px}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-bar{
  display:none;
  position:sticky;top:0;z-index:90;
  align-items:center;justify-content:space-between;
  padding:12px 16px;
  background:rgba(8,13,25,.93);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.burger{
  width:42px;height:42px;border-radius:var(--r-md);
  border:1px solid var(--line-2);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--t1);font-size:17px;background:rgba(255,255,255,.03);
}
.burger:hover{border-color:var(--main);color:var(--main)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,6,13,.66);
  z-index:95;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{
  color:#04211F;
  background:linear-gradient(135deg,#55F2E1,#1FC0B0);
  box-shadow:0 0 0 1px rgba(53,230,212,.55),0 12px 32px rgba(53,230,212,.26);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(53,230,212,.8),0 18px 40px rgba(53,230,212,.36);color:#04211F}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  color:var(--t1);
  background:rgba(255,255,255,.03);
  border-color:var(--line-2);
}
.btn-ghost:hover{border-color:var(--main);color:var(--main);transform:translateY(-2px);background:rgba(53,230,212,.07)}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-sm);
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
  border:1px solid rgba(53,230,212,.28);
  background:rgba(53,230,212,.10);
  color:var(--main);
}
.badge-accent{border-color:rgba(201,245,60,.28);background:rgba(201,245,60,.10);color:var(--accent)}
.badge-hot{border-color:rgba(255,122,69,.32);background:rgba(255,122,69,.10);color:var(--hot)}
.tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--r-pill);
  font-size:12px;color:var(--t2);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2px;color:var(--main);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--main),transparent)}

/* ============ Hero ============ */
.hero{padding:64px 0 42px;position:relative}
.hero-row{align-items:center}
.hero h1{
  font-size:clamp(30px,3.4vw,50px);
  line-height:1.24;margin-bottom:18px;letter-spacing:.4px;
}
.hero h1 .hl{color:var(--main);position:relative}
.hero .lead{color:var(--t2);font-size:17px;max-width:640px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-points{display:grid;gap:10px;max-width:620px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--t2)}
.hero-points i{color:var(--accent);font-size:13px;margin-top:6px}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-2);box-shadow:var(--sh);
  background:var(--panel);
  aspect-ratio:4/3;
}
.hero-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.hero-media:hover img{transform:scale(1.03)}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.05) 35%,rgba(7,11,20,.86) 100%);
  pointer-events:none;
}
.hero-media .media-tag{position:absolute;top:14px;left:14px;z-index:2}
.hero-media .media-note{
  position:absolute;left:18px;right:18px;bottom:16px;z-index:2;
  font-size:14px;color:var(--t1);line-height:1.7;
}
.hero-media .media-note span{display:block;font-size:12.5px;color:var(--t2);margin-top:3px}

/* ============ 指标条 ============ */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.stat-cell{background:rgba(11,18,32,.86);padding:22px 20px}
.stat-num{font-size:30px;font-weight:700;color:var(--main);line-height:1.2;letter-spacing:.5px}
.stat-num small{font-size:15px;color:var(--accent);margin-left:2px}
.stat-label{font-size:13.5px;color:var(--t2);margin-top:6px}

/* ============ 板块标题 ============ */
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:30px}
.sec-head h2{font-size:clamp(23px,2.3vw,32px);letter-spacing:.3px}
.sec-head p{color:var(--t2);font-size:15px;max-width:640px;margin-top:10px}
.sec-line{width:52px;height:2px;background:linear-gradient(90deg,var(--main),transparent);border-radius:2px;margin-bottom:12px}

/* ============ 线路网格卡 ============ */
.line-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.line-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 22px 24px;
  box-shadow:var(--sh-soft);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  overflow:hidden;
}
.line-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.line-card:hover{transform:translateY(-3px);border-color:rgba(53,230,212,.34);box-shadow:0 22px 46px rgba(0,0,0,.5)}
.line-card:hover h3{color:var(--main)}
.line-card h3{font-size:19px;margin-bottom:10px;transition:color .25s ease}
.line-card p{font-size:14.5px;color:var(--t2)}
.line-card .card-foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.card-icon{
  width:40px;height:40px;border-radius:var(--r-md);
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(53,230,212,.09);
  border:1px solid rgba(53,230,212,.2);
  color:var(--main);font-size:16px;margin-bottom:16px;
}
.line-card .meta{font-size:12.5px;color:var(--t3);margin-top:14px;display:flex;gap:12px;flex-wrap:wrap}

/* ============ 步骤时间线 ============ */
.steps{position:relative;margin-top:8px}
.step{
  position:relative;
  display:grid;grid-template-columns:120px 1fr;gap:22px;
  padding:0 0 34px;
}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:34px;top:70px;bottom:-4px;width:1px;
  background:linear-gradient(180deg,rgba(53,230,212,.5),rgba(255,255,255,.06));
}
.step:last-child::before{display:none}
.step-index{
  width:68px;height:68px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;color:var(--accent);
  background:rgba(201,245,60,.07);
  border:1px solid rgba(201,245,60,.28);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  position:relative;z-index:2;
}
.step-body{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px 24px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease,transform .25s ease;
}
.step-body:hover{border-color:rgba(53,230,212,.3);transform:translateY(-2px)}
.step-body h3{font-size:20px;margin-bottom:10px}
.step-body p{font-size:14.5px;color:var(--t2)}
.step-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ============ 对照面板 ============ */
.compare{display:grid;grid-template-columns:1fr 62px 1fr;gap:18px;align-items:stretch}
.compare-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 24px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease,transform .25s ease;
}
.compare-card:hover{transform:translateY(-2px)}
.compare-card.is-focus{border-color:rgba(53,230,212,.34);box-shadow:0 0 0 1px rgba(53,230,212,.12),var(--sh-soft)}
.compare-card h3{font-size:20px;margin:14px 0 12px}
.compare-card ul{display:grid;gap:11px}
.compare-card li{display:flex;gap:10px;font-size:14.5px;color:var(--t2)}
.compare-card li i{color:var(--main);font-size:12px;margin-top:7px}
.compare-divider{display:flex;align-items:center;justify-content:center}
.vs{
  width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:var(--t2);
  border:1px solid var(--line-2);background:rgba(255,255,255,.04);
}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 6px 22px 20px;text-align:left;position:relative;
  font-size:17px;font-weight:600;color:var(--t1);
  transition:color .22s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:2px;border-radius:2px;
  background:rgba(255,255,255,.14);transition:background .22s ease;
}
.faq-q:hover{color:var(--main)}
.faq-item.is-open .faq-q{color:var(--main)}
.faq-item.is-open .faq-q::before{background:var(--main);box-shadow:0 0 10px rgba(53,230,212,.7)}
.faq-chev{
  flex:0 0 22px;width:22px;height:22px;color:var(--t3);
  transition:transform .3s ease,color .3s ease;
}
.faq-item.is-open .faq-chev{transform:rotate(90deg);color:var(--main)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
.faq-item.is-open .faq-a{max-height:460px}
.faq-a p{padding:0 40px 24px 20px;color:var(--t2);font-size:15px;line-height:1.9}

/* ============ CTA + 表单 ============ */
.cta-band{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(53,230,212,.10),rgba(12,20,36,.9) 42%,rgba(10,17,32,.92));
  box-shadow:var(--sh);
  overflow:hidden;
  padding:44px 40px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:24px 24px;pointer-events:none;
}
.cta-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:start}
.cta-band h2{font-size:clamp(22px,2.2vw,30px);margin-bottom:14px}
.cta-band .cta-copy{color:var(--t2);font-size:15.5px;margin-bottom:22px}
.cta-list{display:grid;gap:12px}
.cta-list li{display:flex;gap:10px;font-size:14.5px;color:var(--t2)}
.cta-list i{color:var(--accent);font-size:12px;margin-top:7px}
.form-grid{display:grid;gap:16px}
.field{display:grid;gap:8px}
.field label{font-size:13.5px;color:var(--t2);letter-spacing:.3px}
.field input,.field textarea{
  width:100%;
  padding:13px 15px;
  background:rgba(7,11,20,.7);
  border:1px solid var(--line-2);
  border-radius:var(--r-md);
  color:var(--t1);font-size:15px;line-height:1.6;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.field textarea{min-height:104px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--t3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--main);
  box-shadow:0 0 0 3px rgba(53,230,212,.16);
  background:rgba(7,11,20,.9);
}
.form-note{font-size:12.5px;color:var(--t3);line-height:1.8}
.form-tip{
  display:none;padding:12px 15px;border-radius:var(--r-md);
  font-size:14px;border:1px solid rgba(53,230,212,.3);
  background:rgba(53,230,212,.09);color:var(--main);
}
.form-tip.is-show{display:block}

/* ============ 页脚 ============ */
.site-foot{
  margin-top:70px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(9,14,26,.6),rgba(6,10,19,.95));
  position:relative;z-index:1;
}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;
  padding:52px 0 36px;
}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.foot-brand .brand-mark{width:36px;height:36px;flex:0 0 36px}
.foot-brand .brand-text{font-size:17px}
.foot-text{color:var(--t2);font-size:14px;max-width:360px;line-height:1.85}
.foot-col h3{font-size:14.5px;color:var(--t1);margin-bottom:14px;letter-spacing:.4px}
.foot-col ul{display:grid;gap:10px}
.foot-col li{font-size:13.5px;color:var(--t2)}
.foot-col a{color:var(--t2)}
.foot-col a:hover{color:var(--main)}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:18px 0 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--t3);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .side-nav{
    transform:translateX(-102%);
    transition:transform .32s ease;
    width:280px;
    box-shadow:0 0 60px rgba(0,0,0,.6);
  }
  .side-nav.is-open{transform:translateX(0)}
  .app-main{margin-left:0;width:100%}
  .mobile-bar{display:flex}
  .hero{padding-top:38px}
  .line-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .compare{grid-template-columns:1fr;gap:14px}
  .compare-divider{justify-content:flex-start;padding-left:4px}
  .step{grid-template-columns:1fr;gap:14px;padding-bottom:26px}
  .step::before{left:33px;top:78px}
  .step-index{width:56px;height:56px;font-size:18px}
  .cta-band{padding:32px 22px}
  .section{padding:48px 0}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .line-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:24px;padding:38px 0 26px}
  .hero h1{font-size:29px}
  .hero-actions .btn{width:100%}
  .faq-q{font-size:15.5px;padding-right:0}
  .faq-a p{padding-right:16px}
}