/* roulang page: index */
:root{
  --bg-0:#05070D;
  --bg-1:#0A0F1A;
  --bg-2:#0E1524;
  --glass:rgba(20,30,48,.55);
  --line:rgba(120,190,255,.14);
  --line-hi:rgba(42,212,232,.45);
  --c-primary:#2AD4E8;
  --c-primary-600:#14A8BE;
  --c-accent:#8B7CF6;
  --c-warm:#FFB86B;
  --text:#EAF2FF;
  --text-2:#9FB0C8;
  --text-3:#6B7C93;
  --ok:#4ADE80;
  --warn:#FF7A7A;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(42,212,232,.28),0 10px 34px rgba(42,212,232,.22);
  --font-head:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --num-font:"Space Grotesk",Inter,system-ui,sans-serif;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  background-color:var(--bg-0);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(680px 420px at 10% -10%,rgba(42,212,232,.16),transparent 70%),
    radial-gradient(620px 420px at 92% 4%,rgba(139,124,246,.14),transparent 70%),
    linear-gradient(rgba(120,190,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.04) 1px,transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .22s ease}
a:hover{color:#6FE7F5}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--font-head);font-weight:800;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(42,212,232,.32);color:#fff}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:#070B12}
::-webkit-scrollbar-thumb{background:rgba(42,212,232,.35);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(42,212,232,.6)}
.page-wrap{position:relative;z-index:1}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 40px}
.section{padding:88px 0}
.section-alt{background:linear-gradient(180deg,rgba(10,15,26,.75),rgba(10,15,26,.35))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--c-primary);
  text-transform:uppercase;font-weight:600;margin-bottom:14px;
  font-family:var(--num-font);
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--c-primary);display:block}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-title{font-size:30px;line-height:1.35}
.sec-desc{color:var(--text-2);font-size:15px;margin-top:10px;max-width:640px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;
  color:var(--c-primary);white-space:nowrap;
}
.text-link span{transition:transform .22s ease;display:inline-block}
.text-link:hover span{transform:translateX(4px)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-sm);
  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,border-color .22s ease,color .22s ease,filter .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  color:#04121A;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 10px 28px rgba(42,212,232,.26);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 16px 40px rgba(42,212,232,.36);color:#04121A}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 6px 18px rgba(42,212,232,.24)}
.btn-ghost{
  background:rgba(20,30,48,.5);
  border-color:rgba(42,212,232,.35);
  color:var(--text);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(42,212,232,.7);color:var(--c-primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible{outline:2px solid var(--c-warm);outline-offset:3px}
.circle-btn{
  width:40px;height:40px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(20,30,48,.6);border:1px solid var(--line);
  color:var(--text);cursor:pointer;font-size:16px;
  transition:border-color .22s,color .22s,background .22s,transform .22s;
  backdrop-filter:blur(10px);
}
.circle-btn:hover{border-color:var(--line-hi);color:var(--c-primary);transform:translateY(-2px)}
.circle-btn:focus-visible{outline:2px solid var(--c-warm);outline-offset:2px}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,13,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .28s ease,box-shadow .28s ease;
}
.site-header.is-scrolled{background:rgba(5,7,13,.92);box-shadow:0 10px 34px rgba(0,0,0,.55)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .28s ease}
.site-header.is-scrolled .nav-inner{height:60px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--text);text-decoration:none}
.brand:hover{color:var(--text)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(42,212,232,.22),rgba(139,124,246,.22));
  border:1px solid rgba(42,212,232,.4);
  box-shadow:0 0 20px rgba(42,212,232,.22);
}
.brand-mark svg{width:20px;height:20px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em}
.brand-sub{font-size:11px;color:var(--c-warm);letter-spacing:.12em;font-weight:600}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border-radius:10px;color:var(--text-2);font-size:15px;font-weight:500;
  transition:color .22s,background .22s;
}
.nav-links a:hover{color:var(--text);background:rgba(42,212,232,.08)}
.nav-links a.active{color:var(--c-primary);background:rgba(42,212,232,.1);box-shadow:inset 0 -8px 16px -8px rgba(42,212,232,.55)}
.nav-links a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  box-shadow:0 0 10px rgba(42,212,232,.7);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:rgba(20,30,48,.6);border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text)}
.nav-toggle:focus-visible{outline:2px solid var(--c-warm);outline-offset:2px}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;
  background:rgba(5,7,13,.97);
  backdrop-filter:blur(18px);
  padding:96px 24px 36px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;
}
.drawer.open{opacity:1;visibility:visible}
.drawer-close{
  position:absolute;top:22px;right:22px;width:42px;height:42px;border-radius:12px;
  background:rgba(20,30,48,.7);border:1px solid var(--line);color:var(--text);
  font-size:18px;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:auto}
.drawer-nav a{
  display:block;padding:16px 12px;border-radius:12px;
  color:var(--text);font-size:19px;font-weight:600;
  border-bottom:1px solid rgba(120,190,255,.1);
  opacity:0;transform:translateY(10px);
  transition:opacity .3s ease,transform .3s ease,background .22s;
}
.drawer.open .drawer-nav a{opacity:1;transform:none}
.drawer.open .drawer-nav a:nth-child(1){transition-delay:.04s}
.drawer.open .drawer-nav a:nth-child(2){transition-delay:.08s}
.drawer.open .drawer-nav a:nth-child(3){transition-delay:.12s}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--c-primary);background:rgba(42,212,232,.1)}
.drawer-foot{padding-top:22px}
.drawer-tip{font-size:12px;color:var(--text-3);margin-top:14px;line-height:1.7}
.drawer .btn{width:100%;height:46px}

/* Hero */
.hero{padding:72px 0 80px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:6px 14px;border-radius:999px;
  background:rgba(20,30,48,.6);border:1px solid var(--line);
  font-size:12px;letter-spacing:.06em;color:var(--text-2);
  backdrop-filter:blur(10px);margin-bottom:22px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:999px;background:var(--c-warm);box-shadow:0 0 12px rgba(255,184,107,.9)}
.hero h1{font-size:44px;line-height:1.24;letter-spacing:-.015em}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--c-primary),var(--c-accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:20px;color:var(--text-2);font-size:16.5px;line-height:1.85;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-trust{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:36px}
.hero-trust li{display:flex;align-items:baseline;gap:8px;font-size:13.5px;color:var(--text-2)}
.hero-trust li+li{padding-left:22px;border-left:1px solid rgba(120,190,255,.16)}
.hero-trust .num{
  font-family:var(--num-font);font-size:22px;font-weight:700;color:var(--c-warm);
  text-shadow:0 0 18px rgba(255,184,107,.45);line-height:1;
}
.hero-visual{position:relative}
.hero-card{
  position:relative;aspect-ratio:3/4;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);background:var(--bg-2);
}
.hero-card-img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,13,.5),rgba(5,7,13,.82));
}
.hero-ui{position:absolute;left:24px;right:24px;bottom:96px;z-index:2;display:flex;flex-direction:column;gap:12px}
.ui-bar{height:34px;border-radius:999px;background:rgba(10,15,26,.72);border:1px solid var(--line);display:flex;align-items:center;padding:0 14px}
.ui-bar span{display:block;height:6px;width:58%;border-radius:999px;background:linear-gradient(90deg,var(--c-primary),rgba(42,212,232,0))}
.ui-field{height:42px;border-radius:10px;border:1px solid rgba(120,190,255,.22);background:rgba(10,15,26,.6)}
.ui-progress{height:6px;border-radius:999px;background:rgba(120,190,255,.16);overflow:hidden}
.ui-progress i{display:block;width:62%;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.floating-cover{
  position:absolute;right:18px;bottom:18px;width:96px;height:96px;border-radius:14px;overflow:hidden;
  border:1px solid var(--line-hi);box-shadow:var(--shadow-glow);z-index:3;
  animation:bob 6s ease-in-out infinite;background:var(--bg-2);
}
.floating-cover img{width:100%;height:100%;object-fit:cover}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* 信任条 */
.trust-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 26px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.trust-bar span{font-size:13.5px;color:var(--text-2);display:inline-flex;align-items:center;gap:8px}
.trust-bar span::before{
  content:"";width:5px;height:5px;border-radius:999px;background:var(--c-primary);
  box-shadow:0 0 8px rgba(42,212,232,.8);
}

/* 横滑片段卡 */
.track-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px;flex-wrap:wrap}
.track-nav{display:flex;gap:10px}
.clip-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 0 10px;scrollbar-width:none;
}
.clip-track::-webkit-scrollbar{display:none}
.clip-card{
  position:relative;flex:0 0 280px;aspect-ratio:3/4;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);scroll-snap-align:start;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.clip-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.82;transition:transform .5s ease}
.clip-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,13,.12),rgba(5,7,13,.36) 46%,rgba(5,7,13,.94) 100%);
}
.clip-card:hover{transform:translateY(-6px);border-color:var(--line-hi);box-shadow:var(--shadow-glow)}
.clip-card:hover img{transform:scale(1.04)}
.clip-step{
  position:absolute;top:14px;left:14px;z-index:2;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.05em;
  color:#1B1002;background:linear-gradient(135deg,#FFD3A0,var(--c-warm));
  box-shadow:0 6px 18px rgba(255,184,107,.3);
  font-family:var(--num-font);
}
.clip-body{position:absolute;left:18px;right:18px;bottom:18px;z-index:2}
.clip-body h3{font-size:17px;line-height:1.45;font-weight:700;margin-bottom:8px}
.clip-body p{font-size:12.5px;line-height:1.65;color:var(--text-2)}

/* 要点清单 */
.step-list{background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);padding:8px 26px;backdrop-filter:blur(14px)}
.step-item{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid rgba(120,190,255,.12);transition:background .22s}
.step-item:last-child{border-bottom:0}
.step-item:hover{background:rgba(42,212,232,.04)}
.step-num{
  flex:0 0 62px;font-family:var(--num-font);font-size:40px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px var(--c-primary);
  text-shadow:0 0 18px rgba(255,184,107,.45);padding-top:2px;
}
.step-item h3{font-size:18px;font-weight:700;margin-bottom:8px}
.step-item p{color:var(--text-2);font-size:14.5px;line-height:1.8}

/* 资讯卡片 */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;color:var(--text);
  backdrop-filter:blur(14px);box-shadow:var(--shadow-card);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.news-card:hover{transform:translateY(-6px);border-color:var(--line-hi);box-shadow:var(--shadow-glow);color:var(--text)}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;gap:10px}
.pill{
  align-self:flex-start;padding:3px 11px;border-radius:999px;font-size:11.5px;
  letter-spacing:.06em;color:var(--c-primary);
  background:rgba(42,212,232,.1);border:1px solid rgba(42,212,232,.28);
}
.news-body h3{
  font-size:16.5px;line-height:1.5;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:13.5px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid rgba(120,190,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.news-meta time{font-size:13px;color:var(--c-warm);font-family:var(--num-font)}
.news-meta .arrow{color:var(--c-primary);transition:transform .28s ease}
.news-card:hover .news-meta .arrow{transform:translateX(4px)}
.empty-panel{
  min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  background:var(--glass);border:1px dashed var(--line);border-radius:var(--r-lg);
  color:var(--text-2);text-align:center;padding:32px;backdrop-filter:blur(14px);
}

/* FAQ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;backdrop-filter:blur(14px);
  transition:border-color .25s ease;
}
.faq-item.open{border-color:var(--line-hi)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;background:none;border:0;color:var(--text);
  font-size:16.5px;font-weight:600;text-align:left;cursor:pointer;line-height:1.55;
}
.faq-q:focus-visible{outline:2px solid var(--c-warm);outline-offset:-4px}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:999px;
  border:1px solid rgba(42,212,232,.4);position:relative;
  transition:transform .3s ease,border-color .3s ease;display:inline-block;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:1.5px}
.faq-icon::after{width:1.5px;height:11px}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--c-warm)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s ease}
.faq-a>div{overflow:hidden;padding:0 22px}
.faq-a p{font-size:15px;line-height:1.8;color:var(--text-2);border-left:0 solid transparent;transition:border-color .3s}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-item.open .faq-a>div{padding-bottom:20px}
.faq-item.open .faq-a p{border-left:3px solid var(--c-primary);padding-left:14px}

/* 口碑条 */
.marquee{
  overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
}
.marquee-track{display:flex;gap:20px;width:max-content;animation:slide 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.quote-card{
  flex:0 0 300px;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-md);padding:22px;backdrop-filter:blur(14px);
  display:flex;flex-direction:column;gap:14px;transition:border-color .25s;
}
.quote-card:hover{border-color:var(--line-hi)}
.quote-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:38px;height:38px;flex:0 0 38px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(42,212,232,.12);border:1px solid rgba(42,212,232,.32);
  color:var(--c-primary);font-weight:700;font-size:15px;
}
.quote-name{font-size:14px;font-weight:600}
.quote-role{font-size:12px;color:var(--text-3)}
.quote-card p{font-size:14px;line-height:1.8;color:var(--text-2)}
.quote-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto}
.dots{display:flex;gap:4px}
.dots i{width:6px;height:6px;border-radius:999px;background:var(--c-warm);opacity:.9;display:block}
.dots i.off{background:rgba(120,190,255,.22)}

/* CTA 横条 */
.cta-bar{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(14px);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-bar::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,190,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.07) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:linear-gradient(90deg,#000,transparent 65%);
  mask-image:linear-gradient(90deg,#000,transparent 65%);
}
.cta-bar h2{font-size:26px;line-height:1.4;position:relative}
.cta-bar p{margin-top:10px;color:var(--text-2);font-size:14px;position:relative;max-width:560px}
.cta-actions{display:flex;flex-direction:column;gap:10px;position:relative}
.cta-note{font-size:12px;color:var(--text-3)}

/* 页脚 */
.site-footer{border-top:1px solid transparent;position:relative;background:linear-gradient(180deg,rgba(10,15,26,.5),rgba(5,7,13,.95));margin-top:20px}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(42,212,232,.65),rgba(139,124,246,.5),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.85;max-width:300px}
.footer-col h3{font-size:14px;font-weight:700;letter-spacing:.05em;margin-bottom:18px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--c-primary)}
.footer-col li span{font-size:14px;color:var(--text-2)}
.footer-bottom{
  border-top:1px solid rgba(120,190,255,.12);padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:44px;height:44px;border-radius:999px;
  background:rgba(20,30,48,.8);border:1px solid var(--line-hi);
  color:var(--c-primary);cursor:pointer;font-size:16px;
  backdrop-filter:blur(12px);box-shadow:var(--shadow-glow);
  transition:transform .22s ease,color .22s ease;
}
.back-top:hover{transform:translateY(-3px);color:#fff}
.back-top:focus-visible{outline:2px solid var(--c-warm);outline-offset:3px}

/* 入场动画 */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .32s ease,transform .32s ease}
.js .reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1024px){
  .container{padding:0 32px}
  .section{padding:64px 0}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:36px}
  .hero-sub{max-width:none}
  .hero-visual{max-width:420px}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sec-title{font-size:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
  .nav-links{display:none}
  .nav-cta .btn{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:768px){
  .nav-inner{height:64px}
  .hero h1{font-size:30px}
  .hero-trust{gap:14px}
  .hero-trust li+li{padding-left:14px}
  .cta-bar{padding:30px 24px}
  .cta-bar h2{font-size:22px}
  .step-list{padding:6px 18px}
  .step-item{gap:16px;padding:20px 0}
  .step-num{flex-basis:48px;font-size:32px}
  .quote-card{flex-basis:260px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .section{padding:48px 0}
  .hero{padding:40px 0 48px}
  .hero h1{font-size:28px;line-height:1.32}
  .hero-sub{font-size:15px;margin-top:16px}
  .hero-actions{gap:10px;margin-top:26px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-trust{margin-top:26px;gap:12px}
  .hero-trust li{font-size:12.5px}
  .hero-trust .num{font-size:18px}
  .hero-card{aspect-ratio:4/5}
  .hero-ui{bottom:104px;left:18px;right:18px}
  .clip-card{flex-basis:240px}
  .news-grid{grid-template-columns:1fr}
  .sec-title{font-size:22px}
  .trust-bar{padding:16px 18px;justify-content:flex-start;gap:12px}
  .trust-bar span{font-size:12.5px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%;height:46px}
  .btn{height:46px}
  .back-top{right:16px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .marquee{-webkit-mask-image:none;mask-image:none}
  .marquee-track{animation:none;width:100%;flex-wrap:wrap;justify-content:center}
  .quote-card{flex:0 0 300px}
}

/* roulang page: article */
:root{
    --bg-0:#05070D;
    --bg-1:#0A0F1A;
    --bg-2:#0E1524;
    --glass:rgba(20,30,48,.55);
    --line:rgba(120,190,255,.14);
    --line-strong:rgba(42,212,232,.45);
    --c-primary:#2AD4E8;
    --c-primary-600:#14A8BE;
    --c-accent:#8B7CF6;
    --c-warm:#FFB86B;
    --text-1:#EAF2FF;
    --text-2:#9FB0C8;
    --text-3:#6B7C93;
    --ok:#4ADE80;
    --warn:#FF7A7A;
    --radius-lg:20px;
    --radius:16px;
    --radius-sm:12px;
    --radius-pill:999px;
    --shadow-card:0 20px 60px rgba(0,0,0,.45);
    --shadow-glow:0 0 0 1px rgba(42,212,232,.28),0 10px 34px rgba(42,212,232,.22);
    --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    --font-num:"Space Grotesk",Inter,var(--font-cn);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16px;
    line-height:28px;
    color:var(--text-1);
    background-color:var(--bg-0);
    background-image:
      radial-gradient(1000px 620px at 84% -12%,rgba(42,212,232,.10),transparent 62%),
      radial-gradient(820px 520px at 4% 6%,rgba(139,124,246,.10),transparent 62%),
      linear-gradient(rgba(120,190,255,.04) 1px,transparent 1px),
      linear-gradient(90deg,rgba(120,190,255,.04) 1px,transparent 1px);
    background-size:auto,auto,32px 32px,32px 32px;
    background-attachment:fixed;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:0}
  a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
  a:hover{color:#7FE9F6}
  button{font-family:inherit;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  p{margin:0}
  h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
  :focus-visible{outline:2px solid var(--c-warm);outline-offset:3px;border-radius:6px}
  ::selection{background:rgba(42,212,232,.28);color:#fff}
  ::-webkit-scrollbar{width:6px;height:6px}
  ::-webkit-scrollbar-track{background:#070B14}
  ::-webkit-scrollbar-thumb{background:rgba(42,212,232,.28);border-radius:999px}
  ::-webkit-scrollbar-thumb:hover{background:rgba(42,212,232,.5)}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(5,7,13,.72);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:background .25s ease,border-color .25s ease;
  }
  .site-header.scrolled{background:rgba(5,7,13,.92);border-bottom-color:rgba(42,212,232,.22)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .25s ease}
  .site-header.scrolled .nav-inner{height:60px}
  .brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1)}
  .brand:hover{color:var(--text-1)}
  .brand-mark{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:rgba(42,212,232,.08);box-shadow:inset 0 0 0 1px rgba(42,212,232,.22)}
  .brand-mark svg{width:22px;height:22px}
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-name{font-size:17px;font-weight:800;letter-spacing:.01em}
  .brand-sub{font-size:11px;letter-spacing:.16em;color:var(--text-3);margin-top:3px}
  .nav-links{display:flex;align-items:center;gap:6px}
  .nav-links a{
    position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
    font-size:15px;color:var(--text-2);border-radius:var(--radius-pill);
    box-shadow:inset 0 0 0 0 rgba(42,212,232,0);
    transition:color .2s ease,background .2s ease,box-shadow .2s ease;
  }
  .nav-links a:hover{color:var(--text-1);background:rgba(42,212,232,.08)}
  .nav-links a.active{
    color:var(--c-primary);background:rgba(42,212,232,.12);
    box-shadow:inset 0 -2px 0 var(--c-primary),inset 0 8px 18px -12px rgba(42,212,232,.9);
  }
  .nav-actions{display:flex;align-items:center;gap:12px}
  .nav-toggle{
    display:none;align-items:center;justify-content:center;width:42px;height:42px;
    border-radius:12px;border:1px solid var(--line);background:rgba(20,30,48,.6);color:var(--text-1);
  }
  .nav-toggle:hover{border-color:var(--line-strong);color:var(--c-primary)}
  .drawer-foot{display:none}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--radius-sm);
    font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
    transition:transform .2s ease,filter .2s ease,box-shadow .25s ease,border-color .2s ease,color .2s ease,background .2s ease;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
    color:#04121A;
    box-shadow:var(--shadow-glow),inset 0 0 0 1px rgba(255,255,255,.18);
  }
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);color:#04121A;box-shadow:0 0 0 1px rgba(42,212,232,.4),0 14px 40px rgba(42,212,232,.3)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(42,212,232,.35),0 6px 18px rgba(42,212,232,.24)}
  .btn-ghost{
    background:var(--glass);color:var(--text-1);
    border:1px solid rgba(42,212,232,.32);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  }
  .btn-ghost:hover{border-color:rgba(42,212,232,.62);color:var(--c-primary);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn-text{display:inline-flex;align-items:center;gap:6px;height:auto;padding:0;border:0;background:none;color:var(--c-primary);font-weight:600;font-size:15px}
  .btn-text svg{transition:transform .2s ease}
  .btn-text:hover svg{transform:translateX(4px)}

  .badge{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
    border-radius:var(--radius-pill);border:1px solid var(--line);
    background:rgba(20,30,48,.6);font-size:12px;letter-spacing:.08em;color:var(--text-2);
  }
  .badge .dot{width:6px;height:6px;border-radius:50%;background:var(--c-warm);box-shadow:0 0 10px rgba(255,184,107,.8)}
  .pill{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-pill);
    font-size:12px;letter-spacing:.06em;color:var(--c-primary);
    background:rgba(42,212,232,.1);border:1px solid rgba(42,212,232,.26);
  }

  /* ---------- 文章头 ---------- */
  .page-main{padding:36px 0 88px}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px}
  .breadcrumb a{color:var(--text-2)}
  .breadcrumb a:hover{color:var(--c-primary)}
  .breadcrumb .sep{color:rgba(107,124,147,.6)}
  .breadcrumb .current{color:var(--text-1)}

  .article-head{
    position:relative;overflow:hidden;
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:34px 36px;box-shadow:var(--shadow-card);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  }
  .article-head::after{
    content:"";position:absolute;right:-120px;top:-120px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(42,212,232,.16),transparent 68%);pointer-events:none;
  }
  .article-head-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
  .article-title{
    font-size:40px;line-height:54px;font-weight:800;letter-spacing:-.01em;
    color:var(--text-1);max-width:900px;
  }
  .article-sub{margin-top:16px;font-size:16px;line-height:30px;color:var(--text-2);max-width:820px}
  .article-meta{
    margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
    font-size:13px;color:var(--text-3);font-family:var(--font-num);
  }
  .article-meta span{display:inline-flex;align-items:center;gap:6px}
  .article-meta .meta-time{color:var(--c-warm)}
  .article-meta .divider{width:1px;height:12px;background:rgba(120,190,255,.22)}
  .copy-btn{
    position:absolute;right:28px;top:28px;
    display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 14px;
    border-radius:var(--radius-pill);border:1px solid var(--line);
    background:rgba(10,15,26,.68);color:var(--text-2);font-size:13px;
    transition:all .2s ease;
  }
  .copy-btn:hover{border-color:var(--line-strong);color:var(--c-primary)}
  .copy-btn.copied{color:var(--ok);border-color:rgba(74,222,128,.42)}

  /* ---------- 双栏 ---------- */
  .article-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:32px;margin-top:32px;align-items:start}
  .article-main{min-width:0}
  .panel{
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow-card);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  }
  .prose-wrap{padding:34px 36px 38px}
  .prose{color:var(--text-2);font-size:16px;line-height:30px}
  .prose > * + *{margin-top:18px}
  .prose h2{
    position:relative;margin-top:40px;padding-left:16px;
    font-size:26px;line-height:38px;font-weight:700;color:var(--text-1);
  }
  .prose h2::before{
    content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;
    background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
    box-shadow:0 0 16px rgba(42,212,232,.6);
  }
  .prose h3{margin-top:28px;font-size:20px;line-height:30px;font-weight:600;color:var(--text-1)}
  .prose h4{margin-top:22px;font-size:17px;line-height:28px;font-weight:600;color:var(--text-1)}
  .prose p{font-size:16px;line-height:30px}
  .prose strong{color:var(--text-1);font-weight:600}
  .prose a{color:var(--c-primary);text-decoration:underline;text-decoration-color:rgba(42,212,232,.4);text-underline-offset:3px}
  .prose a:hover{text-decoration-color:var(--c-primary)}
  .prose ul,.prose ol{padding-left:0}
  .prose ul li,.prose ol li{position:relative;padding-left:22px;line-height:30px;margin-top:10px}
  .prose ul li::before{
    content:"";position:absolute;left:4px;top:12px;width:6px;height:6px;border-radius:50%;
    background:var(--c-primary);box-shadow:0 0 10px rgba(42,212,232,.7);
  }
  .prose ol{counter-reset:li}
  .prose ol li{counter-increment:li}
  .prose ol li::before{
    content:counter(li);position:absolute;left:0;top:5px;width:18px;height:18px;
    display:flex;align-items:center;justify-content:center;border-radius:6px;
    font-size:11px;font-family:var(--font-num);color:var(--c-warm);
    border:1px solid rgba(255,184,107,.4);background:rgba(255,184,107,.08);
  }
  .prose blockquote{
    margin:26px 0;padding:16px 20px;border-left:3px solid var(--c-warm);
    border-radius:0 12px 12px 0;background:rgba(20,30,48,.6);color:var(--text-1);
  }
  .prose blockquote p{color:var(--text-1)}
  .prose img{border-radius:14px;border:1px solid var(--line);margin:24px auto}
  .prose figure{margin:24px 0}
  .prose figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--text-3)}
  .prose table{width:100%;border-collapse:collapse;border-radius:12px;overflow:hidden;font-size:14px;margin-top:20px}
  .prose table th{
    background:#101A2B;color:var(--c-primary);font-size:13px;font-weight:600;
    text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);
  }
  .prose table td{padding:12px 14px;border-bottom:1px solid rgba(120,190,255,.08);color:var(--text-2)}
  .prose table tr:nth-child(odd) td{background:var(--bg-1)}
  .prose table tr:nth-child(even) td{background:var(--bg-2)}
  .prose hr{margin:32px 0;border:0;height:1px;background:linear-gradient(90deg,transparent,rgba(42,212,232,.4),transparent)}

  .empty-state{padding:56px 36px;text-align:center}
  .empty-state h2{font-size:22px;line-height:32px;color:var(--text-1)}
  .empty-state p{margin-top:10px;color:var(--text-3);font-size:14px}
  .empty-state .btn{margin-top:22px}

  /* ---------- 文末区 ---------- */
  .article-foot{margin-top:26px;padding:26px 30px}
  .tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
  .tag-row .label{font-size:13px;color:var(--text-3);margin-right:4px}
  .tag{
    display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--radius-pill);
    font-size:13px;color:var(--text-2);background:rgba(42,212,232,.07);border:1px solid var(--line);
    transition:all .2s ease;
  }
  .tag:hover{color:var(--c-primary);border-color:var(--line-strong)}
  .foot-links{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
  .foot-link{
    display:flex;flex-direction:column;gap:6px;padding:18px 20px;border-radius:var(--radius-sm);
    background:rgba(10,15,26,.6);border:1px solid var(--line);transition:all .22s ease;
  }
  .foot-link:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.35)}
  .foot-link small{font-size:12px;letter-spacing:.08em;color:var(--c-warm)}
  .foot-link strong{font-size:15px;font-weight:600;color:var(--text-1)}
  .foot-link span{font-size:13px;line-height:22px;color:var(--text-3)}
  .back-row{margin-top:22px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}

  /* ---------- 侧栏 ---------- */
  .article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
  .side-card{padding:22px 22px 24px;background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow-card)}
  .side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:14px}
  .side-title::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-warm);box-shadow:0 0 10px rgba(255,184,107,.8)}
  .toc-list{display:flex;flex-direction:column;gap:2px}
  .toc-list a{
    display:block;padding:8px 12px;border-radius:10px;font-size:14px;line-height:22px;color:var(--text-2);
    border-left:2px solid transparent;transition:all .18s ease;
  }
  .toc-list a:hover{background:rgba(42,212,232,.08);color:var(--c-primary);border-left-color:var(--c-primary)}
  .quick-list{display:flex;flex-direction:column;gap:10px}
  .quick-link{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-1);
    background:rgba(10,15,26,.7);border:1px solid var(--line);transition:all .2s ease;
  }
  .quick-link:hover{border-color:var(--line-strong);color:var(--c-primary);transform:translateX(3px)}
  .quick-link svg{flex:none;opacity:.7}
  .rel-list{display:flex;flex-direction:column;gap:14px}
  .rel-item{display:flex;gap:12px;align-items:flex-start}
  .rel-item img{width:72px;height:54px;object-fit:cover;border-radius:10px;border:1px solid var(--line);flex:none}
  .rel-item .rel-body{min-width:0}
  .rel-item .rel-body strong{display:block;font-size:14px;font-weight:600;line-height:22px;color:var(--text-1);transition:color .2s ease}
  .rel-item:hover .rel-body strong{color:var(--c-primary)}
  .rel-item .rel-body em{display:block;font-style:normal;font-size:12px;color:var(--text-3);margin-top:4px;font-family:var(--font-num)}
  .side-tip{font-size:13px;line-height:24px;color:var(--text-3)}

  /* ---------- 相关推荐 ---------- */
  .section{padding:64px 0 0}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
  .section-head h2{font-size:30px;line-height:42px;color:var(--text-1)}
  .section-head p{margin-top:10px;font-size:14px;color:var(--text-3)}
  .rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
  .rec-card{
    display:flex;flex-direction:column;overflow:hidden;border-radius:var(--radius);
    background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-card);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .rec-card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:0 20px 50px rgba(0,0,0,.5)}
  .rec-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
  .rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
  .rec-card:hover .thumb img{transform:scale(1.04)}
  .rec-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,13,0) 40%,rgba(5,7,13,.72))}
  .rec-card .pill{position:absolute;left:14px;top:14px;z-index:2;background:rgba(5,7,13,.72)}
  .rec-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1 1 auto}
  .rec-body h3{font-size:17px;line-height:28px;font-weight:600;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .rec-body p{margin-top:8px;font-size:13px;line-height:23px;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .rec-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-warm);font-family:var(--font-num)}

  /* ---------- CTA ---------- */
  .cta-band{
    margin-top:64px;position:relative;overflow:hidden;
    border-radius:var(--radius-lg);border:1px solid rgba(42,212,232,.26);
    background:
      linear-gradient(120deg,rgba(42,212,232,.14),rgba(139,124,246,.12) 55%,rgba(5,7,13,.9)),
      rgba(10,15,26,.9);
    box-shadow:var(--shadow-glow);
    padding:34px 38px;
    display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
    background-image:linear-gradient(rgba(120,190,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.06) 1px,transparent 1px);
    background-size:26px 26px;
    mask-image:linear-gradient(90deg,#000,transparent 70%);
    -webkit-mask-image:linear-gradient(90deg,#000,transparent 70%);
  }
  .cta-band .cta-text{position:relative;z-index:1}
  .cta-band h2{font-size:26px;line-height:38px;color:var(--text-1)}
  .cta-band p{margin-top:8px;font-size:14px;color:var(--text-2)}
  .cta-band .cta-act{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
  .cta-band .cta-act small{font-size:12px;color:var(--text-3)}

  /* ---------- 页脚 ---------- */
  .site-footer{position:relative;margin-top:88px;background:rgba(5,7,13,.92);border-top:1px solid rgba(42,212,232,.24)}
  .site-footer::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:linear-gradient(90deg,transparent,rgba(42,212,232,.7),rgba(139,124,246,.7),transparent)}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:56px 0 40px}
  .footer-brand .brand{margin-bottom:16px}
  .footer-desc{font-size:14px;line-height:26px;color:var(--text-3);max-width:340px}
  .footer-col h3{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
  .footer-col ul{display:flex;flex-direction:column;gap:10px}
  .footer-col a,.footer-col span{font-size:14px;line-height:24px;color:var(--text-3)}
  .footer-col a:hover{color:var(--c-primary)}
  .footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:20px 0 32px;border-top:1px solid rgba(120,190,255,.1);font-size:13px;color:var(--text-3);font-family:var(--font-num)}
  .to-top{
    position:fixed;right:26px;bottom:26px;z-index:70;width:46px;height:46px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    background:rgba(20,30,48,.82);border:1px solid rgba(42,212,232,.4);color:var(--c-primary);
    backdrop-filter:blur(10px);box-shadow:0 10px 30px rgba(0,0,0,.45);
    opacity:0;pointer-events:none;transform:translateY(10px);transition:all .25s ease;
  }
  .to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
  .to-top:hover{background:rgba(42,212,232,.16);color:#04121A;background:linear-gradient(135deg,var(--c-primary),var(--c-accent))}

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    .container{padding:0 32px}
    .article-grid{grid-template-columns:1fr;gap:24px}
    .article-side{position:static;order:2}
    .article-title{font-size:32px;line-height:44px}
    .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
    .section{padding-top:52px}
    .cta-band{margin-top:52px}
  }
  @media (max-width:900px){
    .nav-toggle{display:inline-flex}
    .nav-actions .btn{display:none}
    .nav-links{
      position:fixed;left:0;right:0;top:64px;height:calc(100vh - 64px);
      flex-direction:column;align-items:stretch;gap:8px;
      padding:22px 20px 40px;overflow-y:auto;
      background:rgba(5,7,13,.97);backdrop-filter:blur(18px);
      border-top:1px solid var(--line);
      opacity:0;transform:translateY(-10px);pointer-events:none;transition:opacity .22s ease,transform .22s ease;
    }
    .nav-links.open{opacity:1;transform:translateY(0);pointer-events:auto}
    .nav-links a{height:48px;font-size:16px;border-radius:12px;padding:0 16px;background:rgba(20,30,48,.5);border:1px solid var(--line)}
    .nav-links a.active{box-shadow:inset 3px 0 0 var(--c-primary)}
    .drawer-foot{display:flex;flex-direction:column;gap:12px;margin-top:18px}
    .drawer-foot small{font-size:12px;line-height:20px;color:var(--text-3)}
  }
  @media (max-width:640px){
    .container{padding:0 20px}
    body{font-size:15px;line-height:27px}
    .page-main{padding:24px 0 56px}
    .article-head{padding:24px 20px 26px}
    .article-title{font-size:26px;line-height:36px}
    .article-sub{font-size:15px;line-height:27px}
    .copy-btn{position:static;margin-top:18px}
    .article-head-top{margin-bottom:12px}
    .prose-wrap{padding:22px 20px 26px}
    .prose h2{font-size:21px;line-height:32px;margin-top:32px}
    .prose h3{font-size:18px;line-height:28px}
    .prose p{font-size:15px;line-height:28px}
    .article-foot{padding:20px 20px}
    .foot-links{grid-template-columns:1fr}
    .rec-grid{grid-template-columns:1fr}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px}
    .section-head h2{font-size:23px;line-height:34px}
    .cta-band{padding:26px 22px;flex-direction:column;align-items:flex-start}
    .cta-band h2{font-size:21px;line-height:32px}
    .cta-band .cta-act{align-items:flex-start;width:100%}
    .cta-band .cta-act .btn{width:100%}
    .footer-grid{grid-template-columns:1fr;gap:26px;padding:40px 0 28px}
    .footer-bottom{font-size:12px}
    .to-top{right:16px;bottom:16px}
    .prose table{display:block;overflow-x:auto;white-space:nowrap}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
    html{scroll-behavior:auto}
  }

/* roulang page: category1 */
:root{
    --bg-0:#05070D;
    --bg-1:#0A0F1A;
    --bg-2:#0E1524;
    --c-primary:#2AD4E8;
    --c-primary-600:#14A8BE;
    --c-accent:#8B7CF6;
    --c-warm:#FFB86B;
    --c-ok:#4ADE80;
    --c-warn:#FF7A7A;
    --t-main:#EAF2FF;
    --t-sub:#9FB0C8;
    --t-weak:#6B7C93;
    --glass:rgba(20,30,48,0.55);
    --glass-border:rgba(120,190,255,0.14);
    --glass-border-hi:rgba(42,212,232,0.45);
    --radius-lg:20px;
    --radius:16px;
    --radius-sm:12px;
    --shadow-card:0 20px 60px rgba(0,0,0,.45);
    --shadow-glow:0 0 0 1px rgba(42,212,232,.28), 0 10px 34px rgba(42,212,232,.22);
    --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    --font-num:"Space Grotesk",Inter,"PingFang SC",system-ui,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.75;
    color:var(--t-main);
    background-color:var(--bg-0);
    -webkit-font-smoothing:antialiased;
    background-image:
      radial-gradient(900px 620px at 10% -8%, rgba(42,212,232,.14), transparent 62%),
      radial-gradient(820px 560px at 94% 4%, rgba(139,124,246,.12), transparent 64%),
      linear-gradient(rgba(120,190,255,.045) 1px, transparent 1px),
      linear-gradient(90deg, rgba(120,190,255,.045) 1px, transparent 1px);
    background-size:auto, auto, 32px 32px, 32px 32px;
    background-attachment:fixed;
  }
  h1,h2,h3,h4,p,figure{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  img{display:block;max-width:100%;height:auto;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid var(--c-warm);outline-offset:3px;border-radius:6px;}

  ::-webkit-scrollbar{width:6px;height:6px;}
  ::-webkit-scrollbar-track{background:var(--bg-0);}
  ::-webkit-scrollbar-thumb{background:rgba(120,190,255,.22);border-radius:999px;}
  ::-webkit-scrollbar-thumb:hover{background:rgba(42,212,232,.45);}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px;}
  @media (max-width:1024px){.container{padding:0 32px;}}
  @media (max-width:640px){.container{padding:0 20px;}}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(5,7,13,.72);
    border-bottom:1px solid rgba(120,190,255,.10);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:background .25s ease,border-color .25s ease;
  }
  .site-header.scrolled{background:rgba(5,7,13,.92);border-bottom-color:rgba(42,212,232,.26);}
  .header-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height .25s ease;}
  .site-header.scrolled .header-inner{height:60px;}

  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:34px;height:34px;display:grid;place-items:center;border-radius:10px;
    background:rgba(42,212,232,.08);border:1px solid rgba(42,212,232,.30);
    box-shadow:0 0 18px rgba(42,212,232,.18);
  }
  .brand-mark svg{width:22px;height:22px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-name{font-size:17px;font-weight:800;letter-spacing:-0.01em;color:var(--t-main);}
  .brand-sub{font-size:11px;color:var(--t-weak);letter-spacing:.08em;}

  .nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
  .nav-links a{
    position:relative;padding:8px 14px;border-radius:999px;
    font-size:14px;color:var(--t-sub);
    transition:color .2s ease,background .2s ease;
  }
  .nav-links a:hover{color:var(--t-main);background:rgba(120,190,255,.07);}
  .nav-links a.active{
    color:var(--c-primary);background:rgba(42,212,232,.10);
    box-shadow:inset 0 -8px 12px -10px rgba(42,212,232,.85);
  }
  .nav-links a.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
    box-shadow:0 0 10px rgba(42,212,232,.7);
  }
  .nav-cta{margin-left:10px;height:40px;padding:0 18px;font-size:14px;}
  .nav-drawer-cta{display:none;}

  .nav-toggle{
    display:none;width:44px;height:44px;place-items:center;margin-left:auto;
    border-radius:12px;background:var(--glass);border:1px solid var(--glass-border);
    color:var(--t-main);cursor:pointer;transition:border-color .2s,color .2s,background .2s;
  }
  .nav-toggle:hover{border-color:var(--glass-border-hi);color:var(--c-primary);}
  .nav-toggle[aria-expanded="true"]{background:rgba(42,212,232,.12);border-color:var(--glass-border-hi);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:12px;
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    border:1px solid transparent;cursor:pointer;
    transition:transform .2s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
    color:#04121A;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 10px 30px rgba(42,212,232,.28);
  }
  .btn-primary:hover{
    transform:translateY(-2px);filter:brightness(1.08);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 14px 38px rgba(42,212,232,.42);
  }
  .btn-primary:active{
    transform:translateY(0);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.16),0 6px 16px rgba(42,212,232,.26);
  }
  .btn-ghost{
    background:var(--glass);border-color:rgba(42,212,232,.28);color:var(--t-main);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .btn-ghost:hover{border-color:rgba(42,212,232,.62);color:var(--c-primary);transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(0);}

  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:15px;font-weight:600;color:var(--c-primary);
  }
  .link-arrow span{transition:transform .2s ease;}
  .link-arrow:hover span{transform:translateX(4px);}

  /* ============ 通用板块 ============ */
  .section{padding:88px 0;}
  .section-alt{background:var(--bg-1);border-top:1px solid rgba(120,190,255,.08);border-bottom:1px solid rgba(120,190,255,.08);}
  @media (max-width:1024px){.section{padding:64px 0;}}
  @media (max-width:640px){.section{padding:48px 0;}}

  .section-head{
    display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
    margin-bottom:36px;flex-wrap:wrap;
  }
  .section-title{font-size:30px;line-height:1.42;font-weight:700;letter-spacing:-0.01em;}
  .section-desc{margin-top:10px;max-width:660px;font-size:15px;color:var(--t-sub);line-height:1.8;}
  @media (max-width:640px){
    .section-title{font-size:22px;line-height:1.45;}
    .section-desc{font-size:14px;}
  }

  .badge{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
    border-radius:999px;font-size:12px;letter-spacing:.08em;color:var(--t-sub);
    background:var(--glass);border:1px solid var(--glass-border);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .badge .dot{
    width:6px;height:6px;border-radius:50%;background:var(--c-warm);
    box-shadow:0 0 10px rgba(255,184,107,.85);
  }
  .chip{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    border-radius:999px;font-size:12px;letter-spacing:.04em;
    color:var(--c-primary);background:rgba(42,212,232,.10);
    border:1px solid rgba(42,212,232,.28);
  }

  /* ============ 分类页头部 ============ */
  .cat-hero{position:relative;overflow:hidden;border-bottom:1px solid rgba(120,190,255,.10);}
  .cat-hero-bg{
    position:absolute;inset:0;background-size:cover;background-position:center;
    opacity:.42;transform:scale(1.02);
  }
  .cat-hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:
      linear-gradient(90deg,rgba(5,7,13,.96) 0%,rgba(5,7,13,.86) 46%,rgba(5,7,13,.58) 100%),
      linear-gradient(180deg,rgba(5,7,13,.30),rgba(5,7,13,.98));
  }
  .cat-hero-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center;
    padding-top:72px;padding-bottom:68px;
  }
  @media (max-width:1024px){
    .cat-hero-inner{grid-template-columns:1fr;gap:36px;padding-top:52px;padding-bottom:52px;}
  }
  @media (max-width:640px){
    .cat-hero-inner{padding-top:40px;padding-bottom:44px;}
  }

  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-weak);margin-bottom:18px;}
  .breadcrumb a{color:var(--t-sub);transition:color .2s;}
  .breadcrumb a:hover{color:var(--c-primary);}
  .breadcrumb .current{color:var(--t-main);}

  .cat-h1{
    font-size:44px;line-height:1.24;font-weight:800;letter-spacing:-0.01em;
    margin:18px 0 18px;
  }
  @media (max-width:1024px){.cat-h1{font-size:36px;}}
  @media (max-width:640px){.cat-h1{font-size:28px;line-height:1.35;}}

  .cat-lead{
    font-size:16px;line-height:1.85;color:var(--t-sub);max-width:600px;
  }
  @media (max-width:640px){.cat-lead{font-size:15px;}}

  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  @media (max-width:640px){
    .hero-actions .btn{width:100%;height:46px;}
  }

  .filter-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;}
  .filter-tab{
    height:38px;padding:0 18px;border-radius:999px;
    font-size:14px;color:var(--t-sub);cursor:pointer;
    background:rgba(14,21,36,.72);border:1px solid rgba(120,190,255,.14);
    transition:color .2s,border-color .2s,background .2s,box-shadow .25s;
  }
  .filter-tab:hover{color:var(--t-main);border-color:rgba(42,212,232,.42);}
  .filter-tab.is-active{
    color:#04121A;font-weight:600;border-color:transparent;
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
    box-shadow:0 8px 22px rgba(42,212,232,.28);
  }

  .cat-hero-visual{
    position:relative;border-radius:var(--radius-lg);overflow:hidden;
    border:1px solid rgba(120,190,255,.18);
    box-shadow:0 24px 70px rgba(0,0,0,.55);
  }
  .cat-hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .cat-hero-visual::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,7,13,.04) 42%,rgba(5,7,13,.90));
  }
  .visual-caption{
    position:absolute;left:18px;right:18px;bottom:16px;z-index:2;
    display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-main);
  }
  .visual-dot{
    width:6px;height:6px;border-radius:50%;background:var(--c-warm);
    box-shadow:0 0 10px rgba(255,184,107,.9);flex-shrink:0;
  }

  /* ============ 要点清单 ============ */
  .point-list{display:grid;grid-template-columns:1fr 1fr;column-gap:56px;}
  .point-item{
    display:flex;gap:20px;padding:28px 0;
    border-top:1px solid rgba(120,190,255,.12);
    transition:background .25s ease;
  }
  .point-num{
    flex-shrink:0;font-family:var(--font-num);
    font-size:40px;line-height:1;font-weight:700;
    color:transparent;-webkit-text-stroke:1px var(--c-primary);
    text-shadow:0 0 18px rgba(255,184,107,.35);
  }
  .point-item h3{font-size:19px;font-weight:600;line-height:1.5;margin-bottom:8px;}
  .point-item p{font-size:15px;line-height:1.8;color:var(--t-sub);}
  @media (max-width:1024px){
    .point-list{grid-template-columns:1fr;column-gap:0;}
  }
  @media (max-width:640px){
    .point-num{font-size:32px;}
    .point-item{gap:14px;padding:22px 0;}
    .point-item h3{font-size:17px;}
    .point-item p{font-size:14px;}
  }

  /* ============ 步骤轨道 ============ */
  .step-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
  .step-card{
    position:relative;padding:26px 20px 24px;border-radius:var(--radius);
    background:linear-gradient(180deg,rgba(14,21,36,.92),rgba(10,15,26,.68));
    border:1px solid rgba(120,190,255,.12);
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .step-card::before{
    content:"";position:absolute;top:-1px;left:20px;width:46px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--c-primary),transparent);
  }
  .step-card:hover{
    transform:translateY(-6px);border-color:var(--glass-border-hi);
    box-shadow:0 18px 44px rgba(0,0,0,.5),0 0 0 1px rgba(42,212,232,.16);
  }
  .step-index{
    display:inline-block;font-family:var(--font-num);
    font-size:12px;letter-spacing:.16em;color:var(--c-warm);
    text-shadow:0 0 16px rgba(255,184,107,.45);margin-bottom:12px;
  }
  .step-card h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:8px;}
  .step-card p{font-size:14px;line-height:1.8;color:var(--t-sub);}
  @media (max-width:1024px){.step-track{grid-template-columns:repeat(2,minmax(0,1fr));}}
  @media (max-width:640px){.step-track{grid-template-columns:1fr;}}

  /* ============ 卡片网格 ============ */
  .card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  @media (max-width:1024px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}}
  @media (max-width:640px){.card-grid{grid-template-columns:1fr;}}

  .content-card{
    display:flex;flex-direction:column;overflow:hidden;
    border-radius:var(--radius);background:var(--glass);
    border:1px solid var(--glass-border);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-card);
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .content-card:hover{
    transform:translateY(-6px);border-color:var(--glass-border-hi);
    box-shadow:0 24px 60px rgba(0,0,0,.5),0 0 0 1px rgba(42,212,232,.20);
  }
  .content-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-2);}
  .content-card .thumb img{
    width:100%;height:100%;object-fit:cover;transition:transform .45s ease;
  }
  .content-card:hover .thumb img{transform:scale(1.05);}
  .content-card .body{
    display:flex;flex-direction:column;gap:10px;flex:1;padding:20px 22px 22px;
  }
  .content-card h3{font-size:18px;line-height:1.5;font-weight:600;}
  .content-card p{font-size:14px;line-height:1.75;color:var(--t-sub);}
  .card-foot{
    margin-top:auto;padding-top:8px;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  .card-foot .time{font-family:var(--font-num);font-size:13px;color:var(--c-warm);}
  .card-arrow{color:var(--c-primary);transition:transform .2s ease;}
  .content-card:hover .card-arrow{transform:translateX(4px);}

  /* ============ FAQ ============ */
  .faq-list{display:flex;flex-direction:column;gap:14px;}
  .faq-item{
    position:relative;overflow:hidden;border-radius:var(--radius);
    background:var(--glass);border:1px solid var(--glass-border);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    transition:border-color .25s ease,background .25s ease;
  }
  .faq-item::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
    opacity:0;transition:opacity .25s ease;
  }
  .faq-item.is-open{border-color:rgba(42,212,232,.42);background:rgba(20,30,48,.68);}
  .faq-item.is-open::before{opacity:1;}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;background:none;border:0;cursor:pointer;text-align:left;
    color:var(--t-main);font-size:17px;font-weight:600;line-height:1.6;
  }
  .faq-q:hover{color:var(--c-primary);}
  .faq-icon{
    flex-shrink:0;width:28px;height:28px;display:grid;place-items:center;
    border-radius:50%;border:1px solid rgba(42,212,232,.35);color:var(--c-primary);
    transition:transform .28s ease,border-color .25s ease,background .25s ease;
  }
  .faq-item.is-open .faq-icon{
    transform:rotate(45deg);background:rgba(42,212,232,.14);border-color:var(--c-primary);
  }
  .faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease;}
  .faq-item.is-open .faq-a{grid-template-rows:1fr;}
  .faq-a-inner{overflow:hidden;}
  .faq-a p{
    padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--t-sub);
  }
  @media (max-width:640px){
    .faq-q{font-size:15px;padding:16px 18px;}
    .faq-a p{padding:0 18px 16px;font-size:14px;}
  }

  /* ============ CTA ============ */
  .cta-bar{
    position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
    padding:44px 40px;border-radius:var(--radius-lg);
    background:var(--glass);border:1px solid rgba(42,212,232,.24);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-glow);
  }
  .cta-bar::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(120,190,255,.06) 1px,transparent 1px),
      linear-gradient(90deg,rgba(120,190,255,.06) 1px,transparent 1px);
    background-size:28px 28px;
    mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 72%);
    -webkit-mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 72%);
  }
  .cta-copy{position:relative;z-index:2;max-width:640px;}
  .cta-copy h2{font-size:26px;line-height:1.45;font-weight:700;margin-bottom:10px;}
  .cta-copy p{font-size:15px;line-height:1.8;color:var(--t-sub);}
  .cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px;}
  @media (max-width:1024px){
    .cta-bar{padding:34px 28px;gap:24px;}
    .cta-copy h2{font-size:22px;}
  }
  @media (max-width:640px){
    .cta-bar{padding:28px 20px;}
    .cta-copy h2{font-size:20px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;height:46px;}
  }

  /* ============ 页脚 ============ */
  .site-footer{
    position:relative;padding-top:64px;background:var(--bg-1);
    border-top:1px solid rgba(120,190,255,.12);
  }
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(42,212,232,.8),rgba(139,124,246,.7),transparent);
  }
  .footer-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
    padding-bottom:48px;
  }
  @media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
  @media (max-width:640px){.footer-grid{grid-template-columns:1fr;gap:28px;}}

  .footer-brand .brand{margin-bottom:16px;}
  .footer-desc{font-size:14px;line-height:1.85;color:var(--t-sub);max-width:340px;}
  .footer-col h3{
    font-size:15px;font-weight:600;color:var(--t-main);margin-bottom:16px;letter-spacing:.02em;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col li{font-size:14px;color:var(--t-sub);line-height:1.7;}
  .footer-col a{color:var(--t-sub);transition:color .2s ease;}
  .footer-col a:hover{color:var(--c-primary);}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    padding:20px 0 28px;border-top:1px solid rgba(120,190,255,.10);
  }
  .footer-bottom p{font-size:13px;color:var(--t-weak);line-height:1.7;}

  /* ============ 返回顶部 ============ */
  .to-top{
    position:fixed;right:24px;bottom:24px;z-index:70;
    width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
    background:var(--glass);border:1px solid var(--glass-border);color:var(--c-primary);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    cursor:pointer;opacity:0;pointer-events:none;
    transition:opacity .25s ease,transform .25s ease,border-color .2s ease;
  }
  .to-top.is-visible{opacity:1;pointer-events:auto;}
  .to-top:hover{transform:translateY(-3px);border-color:var(--glass-border-hi);}
  @media (max-width:640px){.to-top{right:16px;bottom:16px;width:40px;height:40px;}}

  /* ============ 移动端导航抽屉 ============ */
  @media (max-width:900px){
    .nav-cta{display:none;}
    .nav-toggle{display:grid;}
    .nav-links{
      position:fixed;top:72px;left:0;right:0;bottom:0;z-index:75;
      flex-direction:column;align-items:stretch;gap:6px;
      margin-left:0;padding:24px 20px 40px;
      background:rgba(5,7,13,.97);
      backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
      border-top:1px solid rgba(120,190,255,.10);
      overflow-y:auto;
      opacity:0;transform:translateY(-12px);pointer-events:none;
      transition:opacity .25s ease,transform .25s ease;
    }
    .nav-links.is-open{opacity:1;transform:none;pointer-events:auto;}
    .nav-links a{
      padding:14px 16px;border-radius:12px;font-size:16px;
      opacity:0;transform:translateY(8px);
      transition:opacity .3s ease,transform .3s ease,color .2s,background .2s;
    }
    .nav-links.is-open a{opacity:1;transform:none;}
    .nav-links.is-open a:nth-child(1){transition-delay:.04s;}
    .nav-links.is-open a:nth-child(2){transition-delay:.08s;}
    .nav-links.is-open a:nth-child(3){transition-delay:.12s;}
    .nav-links.is-open a:nth-child(4){transition-delay:.16s;}
    .nav-links a.active::after{left:16px;right:auto;width:28px;}
    .nav-drawer-cta{
      display:inline-flex;width:100%;height:46px;margin-top:16px;font-size:15px;
    }
  }

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
      scroll-behavior:auto !important;
    }
  }

/* roulang page: category2 */
:root{
  --bg-0:#05070D;
  --bg-1:#0A0F1A;
  --bg-2:#0E1524;
  --glass:rgba(20,30,48,0.55);
  --glass-border:rgba(120,190,255,0.14);
  --glass-border-hover:rgba(42,212,232,0.45);
  --c-primary:#2AD4E8;
  --c-primary-600:#14A8BE;
  --c-accent:#8B7CF6;
  --c-warm:#FFB86B;
  --t-main:#EAF2FF;
  --t-sec:#9FB0C8;
  --t-weak:#6B7C93;
  --c-ok:#4ADE80;
  --c-warn:#FF7A7A;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(42,212,232,.28),0 10px 34px rgba(42,212,232,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Space Grotesk",Inter,ui-monospace,"SFMono-Regular",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.7;
  color:var(--t-main);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 520px at 10% -6%,rgba(42,212,232,.14),transparent 62%),
    radial-gradient(820px 480px at 94% 4%,rgba(139,124,246,.13),transparent 60%),
    linear-gradient(rgba(120,190,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.04) 1px,transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;}
a:hover{color:var(--c-primary-600);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
::selection{background:rgba(42,212,232,.28);color:#fff;}
::-webkit-scrollbar{width:10px;height:6px;}
::-webkit-scrollbar-track{background:#080d16;}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#1c3247,#12212f);border-radius:6px;}
::-webkit-scrollbar-thumb:hover{background:#234257;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  height:72px;display:flex;align-items:center;
  background:rgba(5,7,13,.74);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(120,190,255,.12);
  transition:height .25s ease,background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  height:60px;
  background:rgba(5,7,13,.9);
  box-shadow:0 10px 30px rgba(0,0,0,.5);
}
.header-inner{display:flex;align-items:center;gap:28px;width:100%;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t-main);flex:none;}
.brand:hover{color:#fff;}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;border-radius:11px;
  background:rgba(42,212,232,.09);
  border:1px solid rgba(42,212,232,.32);
  box-shadow:0 0 18px rgba(42,212,232,.22);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-weight:800;font-size:16px;letter-spacing:.01em;}
.brand-sub{font-size:11px;color:var(--t-weak);letter-spacing:.14em;margin-top:2px;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-links a{
  position:relative;padding:9px 15px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--t-sec);
  transition:color .2s,background .2s,box-shadow .2s;
}
.nav-links a:hover{color:var(--t-main);background:rgba(120,190,255,.08);}
.nav-links a.active{
  color:var(--c-primary);
  background:rgba(42,212,232,.1);
  box-shadow:inset 0 -2px 0 var(--c-primary),inset 0 0 10px rgba(42,212,232,.16);
}
.header-cta{flex:none;margin-left:10px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  border:1px solid rgba(120,190,255,.18);
  background:rgba(20,30,48,.6);
  align-items:center;justify-content:center;
  margin-left:auto;
  transition:border-color .2s,background .2s;
}
.nav-toggle:hover{border-color:rgba(42,212,232,.5);background:rgba(42,212,232,.1);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t-main);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--t-main);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s,box-shadow .25s,background .25s,border-color .25s,color .2s,filter .2s;
}
.btn-primary{
  color:#04121A;
  background:linear-gradient(135deg,#2AD4E8,#8B7CF6);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 10px 30px rgba(42,212,232,.32);
}
.btn-primary:hover{
  color:#04121A;filter:brightness(1.08);transform:translateY(-2px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 14px 40px rgba(42,212,232,.46);
}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 6px 18px rgba(42,212,232,.3);}
.btn-ghost{
  color:var(--t-main);
  background:rgba(20,30,48,.55);
  border:1px solid rgba(42,212,232,.34);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.btn-ghost:hover{
  color:var(--c-primary);border-color:rgba(42,212,232,.7);transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(42,212,232,.25),0 10px 30px rgba(42,212,232,.18);
}
.btn-ghost:active{transform:translateY(0);}
.btn:focus-visible{outline:2px solid var(--c-warm);outline-offset:3px;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(5,7,13,.97);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  display:flex;flex-direction:column;
  padding:20px 22px 34px;
  opacity:0;pointer-events:none;transform:translateY(-10px);
  transition:opacity .26s ease,transform .26s ease;
  overflow-y:auto;
}
.mobile-drawer.open{opacity:1;pointer-events:auto;transform:none;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  border:1px solid rgba(120,190,255,.18);background:rgba(20,30,48,.7);
  font-size:18px;color:var(--t-sec);
}
.drawer-close:hover{color:var(--c-primary);border-color:rgba(42,212,232,.5);}
.drawer-link{
  display:block;padding:15px 16px;border-radius:12px;
  font-size:16px;color:var(--t-sec);font-weight:500;
  border:1px solid rgba(120,190,255,.1);
  background:rgba(20,30,48,.4);
  margin-bottom:10px;
  opacity:0;transform:translateY(8px);
  transition:color .2s,border-color .2s,background .2s,opacity .3s,transform .3s;
}
.mobile-drawer.open .drawer-link{opacity:1;transform:none;}
.mobile-drawer.open .drawer-link:nth-child(1){transition-delay:.04s;}
.mobile-drawer.open .drawer-link:nth-child(2){transition-delay:.08s;}
.mobile-drawer.open .drawer-link:nth-child(3){transition-delay:.12s;}
.drawer-link:hover,.drawer-link.active{color:var(--c-primary);border-color:rgba(42,212,232,.45);background:rgba(42,212,232,.1);}
.drawer-foot{margin-top:auto;padding-top:24px;border-top:1px solid rgba(120,190,255,.1);}
.drawer-foot .btn{width:100%;height:46px;}
.drawer-note{margin-top:12px;font-size:12px;line-height:1.7;color:var(--t-weak);text-align:center;}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:64px 0 52px;
  border-bottom:1px solid rgba(120,190,255,.1);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(700px 320px at 80% 0%,rgba(139,124,246,.16),transparent 65%),
    radial-gradient(620px 300px at 4% 100%,rgba(42,212,232,.14),transparent 68%);
}
.page-head-grid{
  position:relative;z-index:1;
  display:flex;align-items:flex-end;justify-content:space-between;gap:40px;
}
.page-head-main{max-width:760px;}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;
  background:rgba(20,30,48,.62);
  border:1px solid rgba(120,190,255,.16);
  font-size:12px;letter-spacing:.08em;color:var(--t-sec);
}
.badge .dot{
  width:6px;height:6px;border-radius:50%;background:var(--c-warm);
  box-shadow:0 0 10px rgba(255,184,107,.85);
}
.page-head h1{
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.24;font-weight:800;letter-spacing:-.01em;
  margin:20px 0 16px;
}
.page-head h1 .hl{
  background:linear-gradient(120deg,#2AD4E8,#8B7CF6 72%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{font-size:16px;line-height:1.85;color:var(--t-sec);max-width:680px;}
.page-head-aside{flex:none;padding-bottom:6px;}

/* ---------- section ---------- */
.section{padding:88px 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:36px;
}
.section-title{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;line-height:1.36;letter-spacing:-.005em;
}
.section-title::before{
  content:"";display:inline-block;width:5px;height:22px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
  margin-right:14px;vertical-align:-3px;
  box-shadow:0 0 14px rgba(42,212,232,.6);
}
.section-sub{margin-top:12px;font-size:14px;line-height:1.8;color:var(--t-sec);max-width:640px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--c-primary);white-space:nowrap;
  transition:color .2s;
}
.text-link .arw{transition:transform .22s;}
.text-link:hover .arw{transform:translateX(4px);}
.text-link:hover{color:#5BE6F5;}

/* ---------- help layout ---------- */
.help-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:52px;align-items:start;}
.anchor-nav{
  position:sticky;top:96px;
  padding:22px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--glass-border);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.anchor-title{
  font-size:11px;letter-spacing:.16em;color:var(--t-weak);
  margin-bottom:14px;text-transform:uppercase;
}
.anchor-nav ul{display:flex;flex-direction:column;gap:2px;}
.anchor-nav a{
  display:block;padding:10px 12px;border-radius:10px;
  font-size:14px;color:var(--t-sec);
  border-left:2px solid transparent;
  transition:color .2s,background .2s,border-color .2s,padding-left .2s;
}
.anchor-nav a:hover{color:var(--c-primary);background:rgba(42,212,232,.08);border-left-color:var(--c-primary);padding-left:14px;}
.anchor-nav a.current{color:var(--c-primary);background:rgba(42,212,232,.1);border-left-color:var(--c-primary);}
.anchor-cover{
  margin-top:20px;border-radius:12px;overflow:hidden;
  border:1px solid rgba(120,190,255,.14);
}
.anchor-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.anchor-cover figcaption{font-size:12px;line-height:1.6;color:var(--t-weak);padding:10px 12px;background:rgba(10,15,26,.7);}

.help-group{margin-bottom:48px;scroll-margin-top:96px;}
.help-group:last-child{margin-bottom:0;}
.group-title{
  display:flex;align-items:center;gap:12px;
  font-size:20px;font-weight:700;line-height:1.4;
}
.group-num{
  font-family:var(--font-num);font-size:13px;font-weight:600;
  color:var(--c-warm);text-shadow:0 0 18px rgba(255,184,107,.45);
  letter-spacing:.06em;
}
.group-desc{margin:8px 0 6px;font-size:13.5px;line-height:1.75;color:var(--t-weak);}
.group-list{border-top:1px solid rgba(120,190,255,.1);margin-top:14px;}
.help-row{
  position:relative;
  display:flex;align-items:flex-start;gap:18px;
  padding:18px 16px 18px 14px;
  border-bottom:1px solid rgba(120,190,255,.1);
  border-radius:12px;
  transition:background .22s;
}
.help-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
  opacity:0;transition:opacity .22s;
}
.help-row:hover{background:var(--bg-2);}
.help-row:hover::before{opacity:1;}
.row-index{
  flex:none;width:34px;padding-top:2px;
  font-family:var(--font-num);font-size:15px;font-weight:600;
  color:var(--c-warm);text-shadow:0 0 18px rgba(255,184,107,.45);
}
.row-main{flex:1;min-width:0;}
.row-main h3{font-size:17px;font-weight:600;line-height:1.55;margin-bottom:6px;color:var(--t-main);}
.row-main p{font-size:14.5px;line-height:1.8;color:var(--t-sec);}
.row-arrow{
  flex:none;padding-top:3px;font-size:16px;color:var(--t-weak);
  transition:transform .22s,color .22s;
}
.help-row:hover .row-arrow{transform:translateX(4px);color:var(--c-primary);}
.row-tag{
  display:inline-block;margin-left:8px;
  padding:2px 9px;border-radius:999px;
  font-size:11px;letter-spacing:.06em;
  color:var(--c-primary);border:1px solid rgba(42,212,232,.34);
  background:rgba(42,212,232,.08);
  vertical-align:2px;
}

/* ---------- safety tip ---------- */
.safety-tip{
  display:flex;gap:18px;align-items:flex-start;
  padding:24px 26px;
  border-radius:var(--radius);
  background:linear-gradient(90deg,rgba(255,184,107,.11),rgba(20,30,48,.55) 46%);
  border:1px solid rgba(255,184,107,.26);
  border-left:3px solid var(--c-warm);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.tip-mark{
  flex:none;width:36px;height:36px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(255,184,107,.14);
  border:1px solid rgba(255,184,107,.42);
  color:var(--c-warm);font-weight:800;font-size:16px;
}
.tip-body h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.tip-body p{font-size:14.5px;line-height:1.85;color:var(--t-sec);}
.tip-body p + p{margin-top:8px;}

/* ---------- related ---------- */
.related-list{display:grid;border-top:1px solid rgba(120,190,255,.1);}
.related-item{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:18px 8px;
  border-bottom:1px solid rgba(120,190,255,.1);
  color:var(--t-main);
  transition:color .2s,padding-left .22s,background .2s;
}
.related-item:hover{color:var(--c-primary);padding-left:16px;background:rgba(14,21,36,.65);}
.related-item .ri-main{display:flex;flex-direction:column;gap:4px;min-width:0;}
.related-item .ri-title{font-size:16px;font-weight:600;line-height:1.5;}
.related-item .ri-desc{font-size:13.5px;color:var(--t-weak);line-height:1.7;}
.related-item .ri-arw{flex:none;color:var(--t-weak);transition:transform .22s,color .22s;}
.related-item:hover .ri-arw{transform:translateX(4px);color:var(--c-primary);}

/* ---------- cta bar ---------- */
.cta-bar{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:42px 46px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(42,212,232,.24);
  background:linear-gradient(102deg,rgba(14,21,36,.95),rgba(10,15,26,.88));
  box-shadow:var(--shadow-card);
}
.cta-bar::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.16;
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 62%);
  mask-image:linear-gradient(90deg,transparent 0%,#000 62%);
  pointer-events:none;
}
.cta-bar > *{position:relative;z-index:1;}
.cta-bar h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.4;margin-bottom:10px;}
.cta-bar p{font-size:14px;line-height:1.8;color:var(--t-sec);max-width:620px;}
.cta-bar .btn{flex:none;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:24px;
  background:linear-gradient(180deg,rgba(10,15,26,.62),rgba(5,7,13,1));
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(42,212,232,.6),rgba(139,124,246,.55),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:48px;
  padding:64px 0 44px;
}
.footer-desc{
  margin-top:18px;max-width:320px;
  font-size:14px;line-height:1.85;color:var(--t-sec);
}
.footer-col h3{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--t-main);margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col span{font-size:14px;line-height:1.7;color:var(--t-sec);transition:color .2s;}
.footer-col a:hover{color:var(--c-primary);}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:20px 0 34px;
  border-top:1px solid rgba(120,190,255,.08);
  font-size:13px;color:var(--t-weak);
}
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(20,30,48,.8);
  border:1px solid rgba(42,212,232,.32);
  color:var(--c-primary);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .25s,transform .25s,border-color .2s,background .2s;
}
.to-top.show{opacity:1;pointer-events:auto;transform:none;}
.to-top:hover{border-color:rgba(42,212,232,.7);background:rgba(42,212,232,.14);}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .32s ease,transform .32s ease;}
[data-reveal].in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .help-layout{grid-template-columns:1fr;gap:30px;}
  .anchor-nav{position:static;padding:16px;}
  .anchor-nav ul{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;}
  .anchor-nav ul::-webkit-scrollbar{display:none;}
  .anchor-nav ul{scrollbar-width:none;}
  .anchor-nav a{
    white-space:nowrap;border-left:0;border-bottom:2px solid transparent;
    border-radius:999px;background:rgba(120,190,255,.06);padding:8px 14px;
  }
  .anchor-nav a:hover{padding-left:14px;border-left-color:transparent;border-bottom-color:var(--c-primary);}
  .anchor-nav a.current{border-left-color:transparent;border-bottom-color:var(--c-primary);}
  .anchor-cover{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:900px){
  .nav-links,.header-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .page-head{padding:48px 0 40px;}
  .page-head-grid{flex-direction:column;align-items:flex-start;gap:26px;}
  .page-head-aside{padding-bottom:0;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:32px 28px;gap:24px;}
  .cta-bar .btn{width:100%;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .brand-sub{display:none;}
  .page-head h1{font-size:28px;line-height:1.3;}
  .lead{font-size:15px;}
  .btn{height:46px;}
  .help-row{gap:12px;padding:16px 10px 16px 10px;}
  .row-index{width:26px;font-size:14px;}
  .row-main h3{font-size:16px;}
  .row-main p{font-size:14px;}
  .safety-tip{flex-direction:column;gap:12px;padding:20px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .related-item{padding:16px 4px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  [data-reveal]{opacity:1;transform:none;}
}