/* roulang page: index */
:root{
  --ink900:#060A10;
  --ink800:#0A1018;
  --ink700:#111A24;
  --cyan:#17E0C0;
  --cyan-deep:#0FA890;
  --cyan-glow:rgba(23,224,192,.16);
  --amber:#FFB43B;
  --rose:#FF5C7A;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --hi:#EAF2F8;
  --mid:#9BB0C2;
  --lo:#5F7387;
  --r-panel:20px;
  --r-card:16px;
  --r-btn:10px;
  --mono: ui-monospace,"JetBrains Mono",Consolas,monospace;
  --shadow-panel: 0 0 0 1px rgba(255,255,255,.06), inset 0 1px 0 rgba(255,255,255,.06), 0 24px 60px -30px rgba(0,0,0,.9);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink900);
  color:var(--hi);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease-out, border-color .2s ease-out, opacity .2s ease-out;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){ .container{padding-left:32px;padding-right:32px;} }
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:0;}
.section{padding-top:64px;padding-bottom:64px;position:relative;}
@media (min-width:1024px){ .section{padding-top:104px;padding-bottom:104px;} }
.hairline{height:1px;background:var(--line);width:100%;}
.dots{height:24px;background-image:radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);background-size:24px 24px;opacity:.5;}

/* ---------- 导航 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;border-bottom:1px solid transparent;}
.site-header.is-scrolled{background:rgba(6,10,16,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom-color:var(--line);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:baseline;gap:8px;font-weight:700;font-size:17px;letter-spacing:-.01em;}
.logo-dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px rgba(23,224,192,.9);align-self:center;}
.logo-sub{font-size:11px;font-weight:400;color:var(--lo);letter-spacing:.18em;font-family:var(--mono);}
.nav-links{display:flex;align-items:center;gap:36px;}
.nav-link{position:relative;font-size:14px;color:var(--mid);padding:6px 0;}
.nav-link::after{content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;background:var(--cyan);border-radius:2px;transform:translateX(-50%);transition:width .22s ease-out;}
.nav-link:hover{color:var(--hi);}
.nav-link.is-active{color:var(--hi);}
.nav-link.is-active::after{width:12px;}
.nav-right{display:flex;align-items:center;gap:18px;}
.nav-cta{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--hi);padding:8px 2px;}
.nav-cta svg{transition:transform .2s ease-out;}
.nav-cta:hover{color:var(--cyan);}
.nav-cta:hover svg{transform:translateX(3px);}
.menu-btn{display:flex;flex-direction:column;gap:6px;background:none;border:0;padding:8px 0;cursor:pointer;}
.menu-btn span{display:block;width:24px;height:1px;background:var(--hi);transition:transform .22s ease-out,opacity .22s ease-out;}
.menu-btn.is-open span:first-child{transform:translateY(3.5px) rotate(45deg);}
.menu-btn.is-open span:last-child{transform:translateY(-3.5px) rotate(-45deg);}
.mobile-menu{position:fixed;inset:0;z-index:55;background:rgba(6,10,16,.97);backdrop-filter:blur(14px);padding:96px 24px 40px;display:none;flex-direction:column;}
.mobile-menu.is-open{display:flex;}
.mobile-menu a.m-link{font-size:20px;color:var(--hi);padding:20px 0;border-bottom:1px solid var(--line);}
.mobile-menu a.m-link.is-active{color:var(--cyan);}
.mobile-foot{margin-top:auto;color:var(--lo);font-size:13px;line-height:2;font-family:var(--mono);}
@media (min-width:1024px){ .mobile-menu{display:none !important;} }
@media (max-width:1023px){ .nav-links{display:none;} }

/* ---------- Hero ---------- */
.hero{position:relative;min-height:64vh;display:flex;align-items:center;padding-top:120px;padding-bottom:64px;overflow:hidden;}
@media (min-width:1024px){ .hero{min-height:78vh;padding-top:140px;padding-bottom:96px;} }
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:saturate(.5) brightness(.55);transform:scale(1.02);}
.hero-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,16,.72) 0%,rgba(6,10,16,.86) 55%,rgba(6,10,16,1) 100%);}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:80px 80px;mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 80%);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 80%);}
.hero-inner{position:relative;z-index:2;width:100%;display:grid;grid-template-columns:1fr;gap:48px;}
@media (min-width:1024px){ .hero-inner{grid-template-columns:7fr 5fr;align-items:end;} }
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--cyan);border:1px solid rgba(23,224,192,.35);background:var(--cyan-glow);padding:6px 12px;border-radius:999px;}
.hero-title{margin:22px 0 0;font-size:clamp(30px,5vw,54px);line-height:1.15;font-weight:700;letter-spacing:-.01em;}
.hero-title-main{display:block;color:var(--hi);}
.hero-title-sub{display:inline-block;margin-top:10px;color:#C9DBE8;background:linear-gradient(to top,rgba(255,180,59,.42) 0 .16em,transparent .16em);}
.hero-sub{margin:22px 0 0;color:var(--mid);font-size:17px;max-width:520px;}
.hero-actions{margin-top:36px;display:flex;flex-wrap:wrap;align-items:center;gap:22px;}
.btn-primary{display:inline-flex;align-items:center;gap:10px;background:rgba(23,224,192,.1);border:1px solid rgba(23,224,192,.55);color:#CFFBF2;padding:14px 28px;border-radius:var(--r-btn);font-weight:600;font-size:15px;box-shadow:inset 0 0 24px -8px rgba(23,224,192,.6);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,background .2s ease-out;}
.btn-primary:hover{transform:translateY(-1px);background:rgba(23,224,192,.18);border-color:var(--cyan);box-shadow:inset 0 0 30px -6px rgba(23,224,192,.8),0 0 40px -12px rgba(23,224,192,.45);}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;color:var(--hi);border-bottom:1px solid var(--line-strong);padding:4px 0;font-size:14px;}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.hero-stats{display:flex;gap:0;align-items:stretch;border:1px solid var(--line);border-radius:var(--r-panel);background:rgba(17,26,36,.5);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);overflow:hidden;}
.hero-stat{flex:1;padding:20px 18px;}
.hero-stat + .hero-stat{border-left:1px solid var(--line);}
.hero-stat b{display:block;font-family:var(--mono);font-size:26px;line-height:1.2;color:var(--amber);font-weight:600;}
.hero-stat span{display:block;margin-top:6px;font-size:12px;color:var(--lo);letter-spacing:.04em;}

/* ---------- 指标看板 ---------- */
.metric-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){ .metric-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .metric-grid{grid-template-columns:repeat(4,1fr);} }
.metric-card{background:rgba(17,26,36,.55);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--r-panel);padding:26px 22px 20px;box-shadow:var(--shadow-panel);transition:transform .22s ease-out,border-color .22s ease-out;}
.metric-card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.metric-card b{font-family:var(--mono);font-size:clamp(30px,4vw,44px);line-height:1.1;color:var(--cyan);font-weight:600;display:block;}
.metric-card b.amber{color:var(--amber);}
.metric-card .m-label{margin-top:10px;font-size:12px;color:var(--lo);letter-spacing:.08em;font-family:var(--mono);}
.metric-card .m-desc{margin-top:6px;font-size:13px;color:var(--mid);}
.wave{display:flex;align-items:flex-end;gap:3px;height:20px;margin-top:18px;}
.wave i{width:2px;background:rgba(23,224,192,.3);border-radius:1px;}
.wave.amber i{background:rgba(255,180,59,.35);}

/* ---------- 板块标题 ---------- */
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:40px;}
.sec-eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--cyan);text-transform:uppercase;}
.sec-title{margin:12px 0 0;font-size:clamp(24px,3.2vw,36px);line-height:1.25;font-weight:600;letter-spacing:-.01em;}
.sec-desc{margin:14px 0 0;color:var(--mid);font-size:15px;max-width:620px;}
.sec-link{display:inline-flex;align-items:center;gap:8px;color:var(--mid);font-size:14px;border-bottom:1px solid var(--line);padding-bottom:4px;}
.sec-link:hover{color:var(--cyan);border-color:var(--cyan);}

/* ---------- Bento 服务矩阵 ---------- */
.bento{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:1024px){ .bento{grid-template-columns:repeat(12,1fr);} }
.bento-item{background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);padding:28px 26px;display:flex;flex-direction:column;transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;}
.bento-item:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-panel);}
.bento-item.has-cover{padding:0;overflow:hidden;}
.bento-cover{position:relative;aspect-ratio:16/10;overflow:hidden;}
.bento-cover img{width:100%;height:100%;object-fit:cover;filter:saturate(.65) brightness(.8);transition:transform .35s ease-out;}
.bento-item.has-cover:hover .bento-cover img{transform:scale(1.03);}
.bento-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,16,.15) 0%,rgba(6,10,16,.85) 100%);}
.bento-body{padding:24px 26px 28px;display:flex;flex-direction:column;flex:1;}
.bento-no{font-family:var(--mono);font-size:12px;color:var(--amber);letter-spacing:.1em;}
.bento-item h3{margin:14px 0 0;font-size:19px;font-weight:600;line-height:1.5;}
.bento-item p{margin:10px 0 0;color:var(--mid);font-size:14px;line-height:1.85;}
.bento-more{margin-top:auto;padding-top:20px;display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--lo);}
.bento-item:hover .bento-more{color:var(--cyan);}
.bento-icon{width:34px;height:34px;border:1px solid var(--line-strong);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--cyan);margin-bottom:18px;}

/* ---------- 活动节奏 ---------- */
.event-wrap{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:1024px){ .event-wrap{grid-template-columns:repeat(12,1fr);} }
.event-card{background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;transition:transform .22s ease-out,border-color .22s ease-out;}
.event-card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.event-card .e-step{font-family:var(--mono);font-size:12px;color:var(--lo);letter-spacing:.1em;}
.event-card h3{margin:14px 0 0;font-size:17px;font-weight:600;}
.event-card p{margin:10px 0 0;color:var(--mid);font-size:14px;}
.e-tag{display:inline-block;margin-bottom:4px;font-size:12px;font-family:var(--mono);color:var(--amber);border:1px solid rgba(255,180,59,.35);background:rgba(255,180,59,.08);border-radius:999px;padding:4px 12px;}
.countdown{background:rgba(17,26,36,.55);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--r-panel);padding:30px 26px;box-shadow:var(--shadow-panel);display:flex;flex-direction:column;justify-content:space-between;}
.countdown-row{display:flex;gap:12px;margin:18px 0 22px;}
.countdown-cell{flex:1;background:var(--ink900);border:1px solid var(--line);border-radius:12px;padding:14px 8px;text-align:center;}
.countdown-cell b{display:block;font-family:var(--mono);font-size:26px;color:var(--cyan);font-weight:600;}
.countdown-cell span{display:block;margin-top:4px;font-size:11px;color:var(--lo);font-family:var(--mono);letter-spacing:.1em;}
.event-thumb{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);}
.event-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;filter:saturate(.7) brightness(.85);}

/* ---------- 对比 ---------- */
.compare{display:grid;grid-template-columns:1fr;gap:20px;align-items:stretch;}
@media (min-width:1024px){ .compare{grid-template-columns:1fr 40px 1fr;} }
.compare-col{border-radius:var(--r-panel);padding:30px 26px;border:1px solid var(--line);background:var(--ink700);}
.compare-col.good{background:rgba(17,26,36,.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-color:rgba(23,224,192,.45);box-shadow:0 0 40px -12px rgba(23,224,192,.3),var(--shadow-panel);}
.compare-col h3{margin:0;font-size:17px;font-weight:600;display:flex;align-items:center;gap:10px;}
.compare-col .c-tag{font-family:var(--mono);font-size:11px;letter-spacing:.12em;padding:3px 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--lo);}
.compare-col.good .c-tag{color:var(--amber);border-color:rgba(255,180,59,.4);background:rgba(255,180,59,.08);}
.compare-list{list-style:none;margin:22px 0 0;padding:0;}
.compare-list li{display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);font-size:14px;color:var(--mid);line-height:1.8;}
.compare-list li:first-child{border-top:0;}
.dot-bad{width:6px;height:6px;border-radius:50%;background:var(--rose);margin-top:9px;flex:0 0 auto;}
.dot-good{width:6px;height:6px;border-radius:50%;background:var(--cyan);margin-top:9px;flex:0 0 auto;box-shadow:0 0 10px rgba(23,224,192,.8);}
.compare-arrow{display:flex;align-items:center;justify-content:center;color:var(--lo);}
.scale-block{margin-top:32px;}
.scale-row{margin-top:22px;}
.scale-top{display:flex;justify-content:space-between;font-size:13px;color:var(--mid);margin-bottom:8px;}
.scale-bar{height:6px;background:var(--line);border-radius:999px;overflow:hidden;}
.scale-bar i{display:block;height:100%;background:linear-gradient(90deg,rgba(23,224,192,.5),var(--cyan));border-radius:999px;}
.scale-val{font-family:var(--mono);color:var(--amber);font-size:13px;}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:22px;}
@media (min-width:640px){ .news-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .news-grid{grid-template-columns:repeat(3,1fr);} }
.news-card{background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;transition:transform .22s ease-out,border-color .22s ease-out;}
.news-card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.news-cover{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--ink800);}
.news-cover img{width:100%;height:100%;object-fit:cover;filter:saturate(.65) brightness(.82);transition:transform .35s ease-out;}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.badge{display:inline-flex;align-items:center;font-size:12px;padding:4px 12px;border-radius:999px;border:1px solid rgba(23,224,192,.35);background:rgba(23,224,192,.08);color:#9FF2E4;font-family:var(--mono);letter-spacing:.04em;align-self:flex-start;}
.news-title{margin:14px 0 0;font-size:17px;font-weight:600;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a:hover{color:var(--cyan);}
.news-sum{margin:10px 0 0;color:var(--mid);font-size:14px;line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;padding-top:20px;display:flex;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--lo);}
.news-meta .read:hover{color:var(--cyan);}
.empty-state{border:1px dashed var(--line-strong);border-radius:var(--r-panel);padding:56px 24px;text-align:center;color:var(--lo);font-size:14px;background:rgba(17,26,36,.35);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;display:flex;align-items:center;gap:18px;background:none;border:0;padding:22px 0;text-align:left;cursor:pointer;color:var(--hi);font-size:16px;line-height:1.6;transition:color .2s ease-out;}
.faq-q:hover{color:var(--cyan);}
.faq-no{font-family:var(--mono);font-size:12px;color:var(--amber);flex:0 0 auto;}
.faq-q .q-text{flex:1;}
.faq-sign{flex:0 0 auto;width:16px;height:16px;position:relative;}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--lo);transition:transform .22s ease-out,background .22s ease-out;}
.faq-sign::before{left:0;top:7.5px;width:16px;height:1px;}
.faq-sign::after{top:0;left:7.5px;width:1px;height:16px;}
.faq-item.is-open .faq-sign::after{transform:scaleY(0);}
.faq-item.is-open .faq-sign::before{background:var(--cyan);}
.faq-item.is-open .faq-q{color:var(--cyan);}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-a{position:relative;padding:0 0 24px 34px;color:var(--mid);font-size:14px;line-height:1.9;}
.faq-a::before{content:"";position:absolute;left:0;top:2px;bottom:22px;width:2px;background:var(--cyan);border-radius:2px;opacity:.8;}

/* ---------- 表单 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:1024px){ .contact-wrap{grid-template-columns:5fr 7fr;gap:48px;} }
.point{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line);}
.point:first-of-type{border-top:0;}
.point .p-no{font-family:var(--mono);font-size:12px;color:var(--amber);flex:0 0 auto;padding-top:4px;}
.point p{margin:0;color:var(--mid);font-size:14px;line-height:1.85;}
.form-card{background:rgba(17,26,36,.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--r-panel);padding:30px 26px;box-shadow:var(--shadow-panel);}
.field{margin-bottom:20px;}
.field label{display:block;font-size:13px;color:var(--mid);margin-bottom:8px;font-family:var(--mono);letter-spacing:.06em;}
.field input,.field select,.field textarea{width:100%;background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-btn);padding:13px 14px;font-size:15px;color:var(--hi);transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.field input::placeholder,.field textarea::placeholder{color:var(--lo);}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(23,224,192,.14);}
.field textarea{resize:vertical;min-height:118px;line-height:1.8;}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:6px;}
.form-note{font-size:12px;color:var(--lo);}
.form-msg{margin-top:14px;font-size:13px;color:var(--cyan);display:none;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink900);border-top:1px solid var(--line);padding-top:64px;}
.foot-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:640px){ .foot-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;} }
.foot-title{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--lo);text-transform:uppercase;margin-bottom:18px;}
.foot-link{display:block;color:var(--mid);font-size:14px;padding:6px 0;}
.foot-link:hover{color:var(--cyan);}
.foot-brand p{margin:14px 0 0;color:var(--mid);font-size:14px;max-width:300px;line-height:1.9;}
.foot-domain{margin-top:16px;font-family:var(--mono);font-size:13px;color:var(--lo);}
.foot-bottom{margin-top:56px;border-top:1px solid var(--line);padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;color:var(--lo);font-size:13px;}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--mid);font-size:13px;}
.to-top:hover{color:var(--cyan);}

@media (max-width:639px){
  .hero-stat{padding:16px 12px;}
  .hero-stat b{font-size:22px;}
  .faq-q{font-size:15px;}
  .countdown-cell b{font-size:22px;}
}

/* roulang page: article */
:root{
  --ink900:#060A10;
  --ink800:#0A1018;
  --ink700:#111A24;
  --cyan:#17E0C0;
  --cyan-deep:#0FA890;
  --cyan-glow:rgba(23,224,192,.16);
  --amber:#FFB43B;
  --rose:#FF5C7A;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --hi:#EAF2F8;
  --mid:#9BB0C2;
  --lo:#5F7387;
  --r-panel:20px;
  --r-card:16px;
  --r-btn:10px;
  --shadow-panel:0 0 0 1px rgba(255,255,255,.06), inset 0 1px 0 rgba(255,255,255,.06), 0 24px 60px -30px rgba(0,0,0,.9);
  --shadow-glow:0 0 40px -12px rgba(23,224,192,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink900);
  color:var(--hi);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease-out, border-color .2s ease-out, background-color .2s ease-out}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none;padding:0}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-0.01em;color:var(--hi)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(23,224,192,.28);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}
.mono{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:0}

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

/* ===== header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,10,16,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-0.01em;color:var(--hi);white-space:nowrap}
.logo-dot{width:8px;height:8px;border-radius:999px;background:var(--cyan);box-shadow:0 0 12px rgba(23,224,192,.8);flex:none}
.logo-sub{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:11px;font-weight:400;letter-spacing:.18em;color:var(--amber);border:1px solid rgba(255,180,59,.35);border-radius:999px;padding:2px 8px}
.nav-links{display:none;align-items:center;gap:30px}
.nav-link{position:relative;font-size:14px;color:var(--mid);padding:6px 0}
.nav-link:hover{color:var(--hi)}
.nav-link.is-active{color:var(--hi)}
.nav-link.is-active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-2px;width:12px;height:2px;border-radius:2px;background:var(--cyan)}
.nav-right{display:flex;align-items:center;gap:16px}
.nav-cta{
  display:none;align-items:center;gap:8px;font-size:14px;color:var(--hi);
  border:1px solid var(--line-strong);border-radius:999px;padding:8px 18px;
  transition:border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out;
}
.nav-cta:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 24px -10px rgba(23,224,192,.6)}
.menu-btn{display:flex;flex-direction:column;justify-content:center;gap:7px;width:34px;height:34px}
.menu-btn span{display:block;width:24px;height:1px;background:var(--hi);transition:transform .25s ease-out,opacity .25s ease-out}
.menu-btn.is-open span:first-child{transform:translateY(4px) rotate(45deg)}
.menu-btn.is-open span:last-child{transform:translateY(-4px) rotate(-45deg)}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
  .menu-btn{display:none}
}
.mobile-panel{
  position:fixed;inset:0;z-index:70;background:rgba(6,10,16,.96);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:96px 20px 40px;display:none;flex-direction:column;
}
.mobile-panel.is-open{display:flex}
.mobile-panel a.m-link{font-size:19px;color:var(--hi);padding:18px 0;border-bottom:1px solid var(--line)}
.mobile-panel a.m-link:first-child{border-top:1px solid var(--line)}
.mobile-panel .m-foot{margin-top:auto;padding-top:28px;color:var(--lo);font-size:13px;line-height:2}
@media(min-width:1024px){.mobile-panel{display:none !important}}

/* ===== article ===== */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--cyan);z-index:90;transition:width .1s linear}
.page-main{padding-top:72px}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:24px 0 16px;border-bottom:1px solid var(--line);
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--lo);
}
.crumbs a{color:var(--lo)}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{width:1px;height:11px;background:var(--line-strong);display:inline-block}
.crumbs .current{color:var(--hi)}

.article-head{padding:40px 0 0}
.badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;line-height:1;
  padding:7px 13px;border-radius:999px;border:1px solid rgba(23,224,192,.4);
  background:rgba(23,224,192,.08);color:var(--cyan);
}
.badge.amber{border-color:rgba(255,180,59,.4);background:rgba(255,180,59,.08);color:var(--amber)}
.article-title{
  margin-top:20px;
  font-size:clamp(28px,4.2vw,40px);line-height:1.32;font-weight:700;letter-spacing:-0.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:20px;padding-bottom:22px;
  border-bottom:1px solid var(--line);
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:13px;color:var(--lo);
}
.meta-row .vline{width:1px;height:12px;background:var(--line-strong)}
.cover-wrap{margin-top:32px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);position:relative;aspect-ratio:16/9;background:var(--ink700)}
.cover-wrap img{width:100%;height:100%;object-fit:cover;filter:saturate(.9)}
.cover-wrap::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,16,.12),rgba(6,10,16,.55))}

.article-shell{display:grid;gap:48px;padding:56px 0 0}
@media(min-width:1024px){.article-shell{grid-template-columns:minmax(0,760px) 1fr;justify-content:center}}
.article-body{
  min-width:0;font-size:17px;line-height:1.95;color:#D6E2EC;
}
.article-body p{margin:0 0 1.4em;text-align:justify}
.article-body h2{
  position:relative;margin:48px 0 18px;padding-left:16px;
  font-size:clamp(20px,2.4vw,25px);line-height:1.5;color:var(--hi);
}
.article-body h2::before{content:"";position:absolute;left:0;top:.35em;width:3px;height:20px;background:var(--cyan);border-radius:2px}
.article-body h3{
  position:relative;margin:34px 0 14px;padding-left:16px;
  font-size:19px;line-height:1.5;color:var(--hi);
}
.article-body h3::before{content:"";position:absolute;left:2px;top:.5em;width:6px;height:6px;background:var(--amber);border-radius:2px}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(23,224,192,.4)}
.article-body a:hover{border-bottom-color:var(--cyan)}
.article-body strong{color:var(--hi);font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:9px}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--cyan);opacity:.85}
.article-body ol{counter-reset:li}
.article-body ol li{position:relative;padding-left:34px;margin-bottom:9px;counter-increment:li}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:.28em;
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--amber);
  border:1px solid rgba(255,180,59,.35);border-radius:999px;padding:1px 6px;line-height:1.4;
}
.article-body blockquote{
  margin:28px 0;padding:20px 22px;border-left:2px solid var(--cyan);border-radius:0 var(--r-card) var(--r-card) 0;
  background:rgba(17,26,36,.55);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  color:var(--mid);font-style:normal;box-shadow:var(--shadow-panel);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px auto 8px;border:1px solid var(--line)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto}
.article-body table th{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:13px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--mid);text-align:left;padding:12px 14px;border-bottom:1px solid var(--line-strong);
}
.article-body table td{padding:12px 14px;border-bottom:1px solid var(--line);color:#CBD9E4}
.article-body hr{border:none;border-top:1px solid var(--line);margin:36px 0}

.empty-box{
  border:1px solid var(--line);border-radius:var(--r-panel);background:rgba(17,26,36,.55);
  padding:56px 28px;text-align:center;box-shadow:var(--shadow-panel);
}
.empty-box .e-title{font-size:20px;color:var(--hi);margin-bottom:10px}
.empty-box .e-desc{font-size:14px;color:var(--mid);margin-bottom:24px}

.side-card{
  border:1px solid var(--line);border-radius:var(--r-panel);background:rgba(17,26,36,.55);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  padding:22px;box-shadow:var(--shadow-panel);
}
.side-title{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--lo);margin-bottom:14px}
.side-item{display:block;padding:12px 0;border-bottom:1px solid var(--line)}
.side-item:last-child{border-bottom:none;padding-bottom:0}
.side-item .s-t{font-size:15px;color:var(--hi);line-height:1.6}
.side-item:hover .s-t{color:var(--cyan)}
.side-item .s-m{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--lo);margin-top:4px}
.side-body{font-size:14px;color:var(--mid);line-height:1.85}

/* ===== tail blocks ===== */
.section{padding:72px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.sec-title{font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:700}
.sec-note{font-size:14px;color:var(--mid)}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--mid)}
.text-link:hover{color:var(--cyan)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.tag{font-size:13px;padding:6px 13px;border-radius:999px;border:1px solid var(--line-strong);color:var(--mid)}
.tag:hover{border-color:var(--cyan);color:var(--cyan)}

.card-grid{display:grid;gap:24px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.post-card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.post-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink800)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;filter:saturate(.85);transition:transform .3s ease-out}
.post-card:hover .thumb img{transform:scale(1.03)}
.post-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,16,.05),rgba(6,10,16,.7))}
.post-card .body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-card .c-tag{align-self:flex-start;font-size:12px;padding:5px 11px;border-radius:999px;border:1px solid rgba(23,224,192,.35);background:rgba(23,224,192,.08);color:var(--cyan)}
.post-card h3{font-size:18px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .ex{font-size:14px;color:var(--mid);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--lo)}

.bottom-nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding-top:28px;border-top:1px solid var(--line)}

/* ===== CTA ===== */
.cta-band{
  border:1px solid var(--line);border-radius:var(--r-panel);
  background:rgba(17,26,36,.55);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  padding:36px 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  box-shadow:var(--shadow-panel);
}
.cta-band h2{font-size:clamp(20px,2.6vw,26px);line-height:1.4}
.cta-band p{font-size:14px;color:var(--mid);margin-top:8px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;padding:14px 28px;border-radius:var(--r-btn);
  border:1px solid var(--cyan);background:rgba(23,224,192,.1);color:var(--hi);
  box-shadow:0 0 32px -14px rgba(23,224,192,.7);
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out;
}
.btn:hover{transform:translateY(-1px);background:rgba(23,224,192,.18);box-shadow:0 0 40px -10px rgba(23,224,192,.85)}
.btn-ghost{border-color:var(--line-strong);background:transparent;box-shadow:none;color:var(--hi)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:transparent;box-shadow:0 0 30px -14px rgba(23,224,192,.6)}

/* ===== footer ===== */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:var(--ink900);padding:64px 0 28px}
.foot-grid{display:grid;gap:36px;grid-template-columns:1fr}
@media(min-width:640px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.foot-brand p{font-size:14px;color:var(--mid);margin-top:16px;line-height:1.85;max-width:320px}
.foot-domain{margin-top:16px;font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--lo)}
.foot-title{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--lo);margin-bottom:16px}
.foot-link{display:block;font-size:14px;color:var(--mid);padding:6px 0}
.foot-link:hover{color:var(--cyan)}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:12px;color:var(--lo);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--lo)}
.to-top:hover{color:var(--cyan)}

/* roulang page: category1 */
:root{
  --ink900:#060A10; --ink800:#0A1018; --ink700:#111A24;
  --cyan:#17E0C0; --cyan-deep:#0FA890; --cyan-soft:rgba(23,224,192,.16);
  --amber:#FFB43B; --rose:#FF5C7A;
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --hi:#EAF2F8; --mid:#9BB0C2; --lo:#5F7387;
  --r-panel:20px; --r-card:16px; --r-btn:10px;
  --glass:rgba(17,26,36,.55);
  --shadow-panel:0 0 0 1px rgba(255,255,255,.06), inset 0 1px 0 rgba(255,255,255,.06), 0 24px 60px -30px rgba(0,0,0,.9);
  --shadow-glow:0 0 40px -12px rgba(23,224,192,.35);
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;background:var(--ink900);color:var(--hi);
  font-family:var(--font-sans);font-size:16px;line-height:1.9;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:80px 80px;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}
::selection{background:rgba(23,224,192,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--ink900)}
::-webkit-scrollbar-thumb{background:#1b2733;border-radius:99px;border:2px solid var(--ink900)}
::-webkit-scrollbar-thumb:hover{background:#2a3a49}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative}
@media (min-width:1024px){.container{padding:0 32px}}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,10,16,.72);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--hi)}
.logo-dot{width:8px;height:8px;border-radius:999px;background:var(--cyan);flex:none;box-shadow:0 0 12px 2px rgba(23,224,192,.55)}
.logo-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--amber);
  border:1px solid rgba(255,180,59,.42);border-radius:999px;padding:2px 8px;line-height:1.5;
}
.nav-links{display:none;align-items:center;gap:36px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;font-size:14px;color:var(--mid);padding:6px 0;
  transition:color .2s ease-out;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;
  background:var(--cyan);transform:translateX(-50%);transition:width .2s ease-out;
}
.nav-link:hover{color:var(--hi)}
.nav-link.is-active{color:var(--hi)}
.nav-link.is-active::after{width:14px}
.nav-link:focus-visible{outline-offset:4px}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--hi);
  padding-bottom:3px;border-bottom:1px solid var(--line-strong);
  transition:color .2s ease-out,border-color .2s ease-out;
}
.nav-cta:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.nav-cta svg{transition:transform .2s ease-out}
.nav-cta:hover svg{transform:translateX(3px)}
.menu-btn{
  width:42px;height:42px;background:transparent;border:1px solid var(--line);border-radius:10px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  transition:border-color .2s ease-out;
}
.menu-btn span{width:20px;height:1px;background:var(--hi);display:block}
.menu-btn:hover{border-color:var(--line-strong)}
@media (min-width:1024px){.menu-btn{display:none}}

.mobile-nav{
  position:fixed;inset:0;z-index:55;display:none;flex-direction:column;
  background:rgba(6,10,16,.97);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  padding:96px 0 40px;overflow-y:auto;
}
.mobile-nav.is-open{display:flex}
.mobile-nav .m-inner{padding:0 24px}
.m-link{
  display:block;font-size:19px;color:var(--mid);padding:18px 0;
  border-bottom:1px solid var(--line);transition:color .2s ease-out,padding-left .2s ease-out;
}
.m-link:hover,.m-link.is-active{color:var(--hi);padding-left:6px}
.m-link.is-active{color:var(--cyan)}
.m-foot{margin-top:auto;padding:28px 24px 0;font-family:var(--font-mono);font-size:12px;color:var(--lo);line-height:2}

/* ---------- 页头 ---------- */
.page-head{position:relative;overflow:hidden;padding:138px 0 54px;border-bottom:1px solid var(--line)}
.page-head .ph-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
  opacity:.24;filter:saturate(.55) brightness(.8);
}
.page-head .ph-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(120% 90% at 20% 0%, rgba(0,0,0,.9), transparent 78%);
  mask-image:radial-gradient(120% 90% at 20% 0%, rgba(0,0,0,.9), transparent 78%);
}
.page-head .ph-fade{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(6,10,16,.55),rgba(6,10,16,.92) 65%,var(--ink900))}
.ph-inner{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;color:var(--lo);margin-bottom:22px}
.crumb a{transition:color .2s ease-out}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{opacity:.5}
.crumb .cur{color:var(--hi)}
.ph-tag{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--cyan);border:1px solid rgba(23,224,192,.35);
  background:rgba(23,224,192,.08);border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.ph-title{
  font-size:clamp(28px,4.4vw,48px);line-height:1.18;font-weight:700;letter-spacing:-.01em;
  margin:0 0 16px;max-width:820px;
}
.ph-title span{display:block;color:var(--amber);font-size:clamp(17px,2.1vw,24px);font-weight:600;margin-top:12px;letter-spacing:0}
.ph-title span::after{content:"";display:block;width:56px;height:2px;background:rgba(255,180,59,.7);margin-top:10px;border-radius:2px}
.ph-sub{color:var(--mid);font-size:16px;max-width:620px;margin:0}
.ph-meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:26px;font-family:var(--font-mono);font-size:12px;color:var(--lo)}
.ph-meta b{color:var(--mid);font-weight:400}

/* ---------- 数据条 ---------- */
.stat-section{padding:44px 0 0}
.stat-bar{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden;
}
@media (min-width:900px){.stat-bar{grid-template-columns:repeat(4,1fr)}}
.stat-item{background:var(--ink800);padding:22px 20px;position:relative}
.stat-num{
  font-family:var(--font-mono);font-size:clamp(24px,3vw,32px);line-height:1.2;
  color:var(--amber);font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:13px;color:var(--lo);margin-left:6px;font-family:var(--font-sans)}
.stat-label{font-size:12px;color:var(--lo);margin-top:6px;letter-spacing:.02em}
.wave{display:flex;align-items:flex-end;gap:3px;height:20px;margin-top:14px}
.wave i{display:block;width:3px;background:rgba(23,224,192,.32);border-radius:2px}

/* ---------- 主分栏 ---------- */
.main-section{padding:72px 0 0}
.split{display:grid;gap:44px}
@media (min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:52px}}

.anchor-card{
  background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:var(--r-panel);padding:20px;
  box-shadow:var(--shadow-panel);
}
@media (min-width:1024px){.anchor-wrap{position:sticky;top:100px}}
.anchor-title{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--lo);margin-bottom:14px}
.anchor-list{display:flex;flex-direction:column;gap:2px}
.anchor-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;font-size:14px;color:var(--mid);
  border-left:2px solid transparent;transition:color .2s ease-out,border-color .2s ease-out,background .2s ease-out;
}
.anchor-item .a-num{font-family:var(--font-mono);font-size:12px;color:var(--lo);transition:color .2s ease-out}
.anchor-item:hover{color:var(--hi);border-left-color:var(--line-strong)}
.anchor-item.is-active{color:var(--hi);border-left-color:var(--cyan);background:rgba(23,224,192,.06)}
.anchor-item.is-active .a-num{color:var(--cyan)}
.anchor-cta{margin-top:18px;display:none}
@media (min-width:1024px){.anchor-cta{display:flex}}
@media (max-width:1023px){
  .anchor-card{padding:12px}
  .anchor-list{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:2px}
  .anchor-list::-webkit-scrollbar{display:none}
  .anchor-item{white-space:nowrap;border-left:none;border:1px solid var(--line);border-radius:999px;padding:7px 14px}
  .anchor-item:hover{border-color:var(--line-strong)}
  .anchor-item.is-active{border-color:var(--cyan);background:rgba(23,224,192,.08)}
}

.block{margin-bottom:80px}
.block:last-child{margin-bottom:0}
.sec-head{display:flex;align-items:baseline;gap:13px;margin-bottom:24px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.sec-num{font-family:var(--font-mono);font-size:13px;color:var(--amber);flex:none}
.sec-title{font-size:clamp(21px,2.5vw,28px);line-height:1.3;font-weight:700;letter-spacing:-.01em;margin:0}
.lead{color:var(--mid);font-size:16px;line-height:1.95;text-align:justify}
.lead strong{color:var(--hi);font-weight:600}

.dot-list{list-style:none;padding:0;margin:24px 0 0}
.dot-list li{
  display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);
}
.dot-list li:first-child{border-top:1px solid var(--line)}
.dot-list .d-num{font-family:var(--font-mono);font-size:12px;color:var(--cyan);flex:none;padding-top:3px}
.dot-list .d-txt{color:var(--mid);font-size:15px;line-height:1.85}
.dot-list .d-txt b{color:var(--hi);font-weight:600}

/* ---------- 三步路径 ---------- */
.step-grid{display:grid;gap:18px}
@media (min-width:700px){.step-grid{grid-template-columns:repeat(3,1fr)}}
.step-card{
  background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.step-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-panel)}
.step-num{font-family:var(--font-mono);font-size:13px;color:var(--amber);margin-bottom:14px;display:block}
.step-card h3{font-size:18px;font-weight:600;margin:0 0 10px;line-height:1.5}
.step-card p{font-size:14px;color:var(--mid);line-height:1.85;margin:0}

/* ---------- Bento 卡组 ---------- */
.bento{display:grid;gap:18px}
@media (min-width:640px){.bento{grid-template-columns:repeat(2,1fr)}}
.bento-card{
  background:var(--ink700);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease-out,border-color .2s ease-out;
}
.bento-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.bento-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink800)}
.bento-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) brightness(.82);transition:transform .35s ease-out}
.bento-card:hover .bento-media img{transform:scale(1.03)}
.bento-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(6,10,16,.88),rgba(6,10,16,.06))}
.bento-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.bento-idx{font-family:var(--font-mono);font-size:12px;color:var(--cyan);margin-bottom:10px}
.bento-body h3{font-size:17px;font-weight:600;margin:0 0 9px;line-height:1.5}
.bento-body p{font-size:14px;color:var(--mid);line-height:1.85;margin:0}
.bento-foot{margin-top:16px;display:flex;align-items:center;gap:7px;font-size:13px;color:var(--lo);transition:color .2s ease-out}
.bento-card:hover .bento-foot{color:var(--cyan)}
.bento-foot svg{transition:transform .2s ease-out}
.bento-card:hover .bento-foot svg{transform:translateX(3px)}

/* ---------- 规格参数 ---------- */
.spec-list{border-top:1px solid var(--line);margin-top:6px}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:15px 2px;border-bottom:1px solid var(--line);
}
.spec-k{font-size:14px;color:var(--mid)}
.spec-v{font-family:var(--font-mono);font-size:14px;color:var(--hi);text-align:right}
.spec-v.hl{color:var(--amber)}

/* ---------- FAQ ---------- */
.faq-wrap{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;background:none;border:none;
  color:var(--hi);text-align:left;padding:22px 0;font-size:16px;line-height:1.6;
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--cyan)}
.faq-idx{font-family:var(--font-mono);font-size:13px;color:var(--amber);flex:none}
.faq-plus{position:relative;width:16px;height:16px;flex:none;margin-left:auto}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--lo);transition:transform .25s ease-out,background .25s ease-out}
.faq-plus::before{left:0;top:7px;width:16px;height:1px}
.faq-plus::after{left:7px;top:0;width:1px;height:16px}
.faq-item.is-open .faq-plus::after{transform:scaleY(0)}
.faq-item.is-open .faq-plus::before{background:var(--cyan)}
.faq-item.is-open .faq-q{color:var(--cyan)}
.faq-a{display:none;padding:0 30px 24px 34px;color:var(--mid);font-size:15px;line-height:1.95}
.faq-item.is-open .faq-a{display:block}
@media (max-width:640px){.faq-a{padding:0 0 22px 30px}}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:78px;background:var(--glass);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid rgba(23,224,192,.28);border-radius:var(--r-panel);
  padding:30px 26px;display:flex;flex-direction:column;gap:20px;
  box-shadow:var(--shadow-panel),var(--shadow-glow);
}
@media (min-width:900px){.cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:34px 40px;gap:36px}}
.cta-band h2{font-size:clamp(19px,2.3vw,24px);font-weight:700;margin:0 0 8px;line-height:1.4}
.cta-band p{font-size:14px;color:var(--mid);margin:0;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:rgba(23,224,192,.12);border:1px solid var(--cyan);color:var(--hi);
}
.btn-primary:hover{transform:translateY(-1px);background:rgba(23,224,192,.2);box-shadow:0 0 40px -12px rgba(23,224,192,.6)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--hi)}
.btn-ghost:hover{transform:translateY(-1px);border-color:var(--cyan);color:var(--cyan)}
.btn svg{flex:none}
.btn.w-full{width:100%}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;background:var(--ink900);border-top:1px solid var(--line);
  padding:66px 0 28px;margin-top:96px;
}
.foot-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:640px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.foot-brand p{font-size:14px;color:var(--mid);line-height:1.9;margin:14px 0 10px;max-width:320px}
.foot-domain{font-family:var(--font-mono);font-size:12px;color:var(--lo)}
.foot-title{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--lo);margin-bottom:16px}
.foot-link{display:block;font-size:14px;color:var(--mid);padding:6px 0;transition:color .2s ease-out}
a.foot-link:hover{color:var(--cyan)}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);margin-top:46px;padding-top:22px;
  font-family:var(--font-mono);font-size:12px;color:var(--lo);
}
.to-top{display:inline-flex;align-items:center;gap:7px;color:var(--mid);transition:color .2s ease-out}
.to-top:hover{color:var(--cyan)}

main{position:relative;z-index:1}
.site-header{position:fixed;z-index:60}

@media (max-width:640px){
  .page-head{padding:118px 0 44px}
  .block{margin-bottom:56px}
  .main-section{padding:52px 0 0}
  .stat-section{padding:32px 0 0}
  .site-footer{padding:48px 0 24px;margin-top:64px}
  .cta-band{margin-top:56px}
}

/* roulang page: category2 */
:root{
  --ink900:#060A10;
  --ink800:#0A1018;
  --ink700:#111A24;
  --cyan:#17E0C0;
  --cyan-deep:#0FA890;
  --cyan-soft:rgba(23,224,192,.16);
  --amber:#FFB43B;
  --rose:#FF5C7A;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --hi:#EAF2F8;
  --mid:#9BB0C2;
  --lo:#5F7387;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,monospace;
  --shadow-panel:0 0 0 1px rgba(255,255,255,.06), inset 0 1px 0 rgba(255,255,255,.06), 0 24px 60px -30px rgba(0,0,0,.9);
  --shadow-glow:0 0 40px -12px rgba(23,224,192,.35);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink900);
  color:var(--hi);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(23,224,192,.28);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--ink900);}
::-webkit-scrollbar-thumb{background:#1B2733;border-radius:999px;border:2px solid var(--ink900);}
::-webkit-scrollbar-thumb:hover{background:#26333F;}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,10,16,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--hi);}
.logo-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px rgba(23,224,192,.85);flex:none;}
.logo-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--amber);
  border:1px solid rgba(255,180,59,.35);background:rgba(255,180,59,.08);
  padding:2px 7px;border-radius:999px;line-height:1.4;
}
.nav-links{display:flex;align-items:center;gap:36px;}
.nav-link{
  position:relative;font-size:14px;color:var(--mid);padding:6px 0;
  transition:color .2s ease-out;white-space:nowrap;
}
.nav-link:hover{color:var(--hi);}
.nav-link.is-active{color:var(--hi);}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:-4px;transform:translateX(-50%);
  width:12px;height:2px;border-radius:2px;background:var(--cyan);
}
.nav-right{display:flex;align-items:center;gap:14px;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--hi);
  padding:9px 16px;border-radius:10px;
  border:1px solid var(--line-strong);background:transparent;
  transition:border-color .2s ease-out,background .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.nav-cta:hover{
  border-color:var(--cyan);background:rgba(23,224,192,.08);
  transform:translateY(-1px);box-shadow:0 0 30px -14px rgba(23,224,192,.6);
}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--line-strong);border-radius:10px;
  background:transparent;position:relative;
}
.menu-btn span{
  position:absolute;left:9px;width:20px;height:1px;background:var(--hi);
  transition:transform .25s ease-out,opacity .25s ease-out;
}
.menu-btn span:nth-child(1){top:17px;}
.menu-btn span:nth-child(2){top:23px;}
.site-header.is-open .menu-btn span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.site-header.is-open .menu-btn span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

.mobile-panel{
  display:none;
  position:fixed;inset:0;z-index:70;
  background:rgba(6,10,16,.96);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:96px 24px 40px;
  flex-direction:column;
  gap:0;
}
.mobile-panel.is-open{display:flex;}
.mobile-panel a.m-link{
  display:flex;align-items:center;justify-content:space-between;
  font-size:19px;color:var(--hi);padding:20px 2px;border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link.is-active{color:var(--cyan);}
.mobile-panel .m-foot{margin-top:auto;padding-top:28px;color:var(--lo);font-size:13px;line-height:1.9;}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  padding:150px 0 72px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
  background-image:linear-gradient(180deg,rgba(6,10,16,.86) 0%,rgba(6,10,16,.94) 55%,var(--ink900) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center 30%;
}
.page-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
  mask-image:linear-gradient(180deg,transparent,#000 40%,transparent);
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 40%,transparent);
}
.page-head .container{position:relative;z-index:2;}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--lo);
  padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:26px;
}
.crumb a{color:var(--lo);transition:color .2s ease-out;}
.crumb a:hover{color:var(--cyan);}
.crumb .sep{width:1px;height:12px;background:var(--line-strong);transform:rotate(18deg);}
.crumb .cur{color:var(--hi);}
h1{
  font-size:clamp(30px,5vw,54px);line-height:1.15;font-weight:700;letter-spacing:-.01em;
  max-width:19em;
}
h1 .hl{color:var(--cyan);}
.page-head-sub{
  margin-top:18px;color:var(--mid);font-size:16px;line-height:1.9;max-width:44em;
}
.wave-row{display:flex;align-items:flex-end;gap:5px;height:52px;margin-top:34px;}
.wave-row i{
  display:block;width:5px;border-radius:3px 3px 0 0;
  background:linear-gradient(180deg,rgba(23,224,192,.55),rgba(23,224,192,.08));
  transition:opacity .2s ease-out;
}
.wave-row:hover i{opacity:.75;}

/* ---------- sections ---------- */
section{position:relative;}
.sec{padding:96px 0;}
.sec-tight{padding:72px 0;}
.sec-alt{background:var(--ink800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:44px;flex-wrap:wrap;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--cyan);display:block;}
h2{font-size:clamp(24px,3.2vw,36px);line-height:1.25;font-weight:600;letter-spacing:-.01em;}
h3{font-size:19px;line-height:1.5;font-weight:600;letter-spacing:-.01em;}
.sec-desc{margin-top:14px;color:var(--mid);font-size:15px;max-width:52em;line-height:1.9;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0;}

/* ---------- flow timeline ---------- */
.flow-grid{display:grid;grid-template-columns:minmax(0,7.4fr) minmax(0,4.6fr);gap:56px;align-items:start;}
.timeline{position:relative;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:7px;top:10px;bottom:10px;width:1px;background:var(--line-strong);
}
.tl-item{position:relative;padding-bottom:56px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:-34px;top:7px;width:15px;height:15px;border-radius:50%;
  background:var(--ink900);border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
}
.tl-dot::after{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);}
.tl-item.is-current .tl-dot{border-color:rgba(23,224,192,.7);box-shadow:0 0 20px -2px rgba(23,224,192,.75);}
.tl-num{
  font-family:var(--font-mono);font-size:12px;color:var(--amber);letter-spacing:.12em;margin-bottom:10px;
}
.tl-body h3{margin-bottom:10px;}
.tl-body p{color:var(--mid);font-size:15px;line-height:1.9;}
.tl-body p + p{margin-top:8px;}
.tl-tag{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-family:var(--font-mono);font-size:12px;color:var(--mid);
  border:1px solid var(--line);border-radius:999px;padding:4px 10px;background:rgba(255,255,255,.02);
}

.glass{
  background:rgba(17,26,36,.55);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-panel);
}
.sticky-card{position:sticky;top:104px;padding:28px;}
.sticky-card h3{margin-bottom:6px;}
.sticky-card .sub{color:var(--lo);font-size:13px;margin-bottom:20px;}
.point-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);}
.point-list li:last-child{border-bottom:0;}
.point-list .p-num{font-family:var(--font-mono);font-size:12px;color:var(--amber);flex:none;padding-top:4px;}
.point-list .p-txt strong{display:block;font-size:15px;font-weight:600;color:var(--hi);margin-bottom:4px;}
.point-list .p-txt span{color:var(--mid);font-size:14px;line-height:1.8;}

.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:10px;
  background:rgba(23,224,192,.12);
  border:1px solid rgba(23,224,192,.55);
  color:#EAF2F8;font-size:15px;font-weight:600;
  box-shadow:inset 0 0 22px -8px rgba(23,224,192,.55);
  transition:transform .2s ease-out,background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.btn-primary:hover{
  transform:translateY(-1px);
  background:rgba(23,224,192,.2);
  border-color:var(--cyan);
  box-shadow:inset 0 0 26px -6px rgba(23,224,192,.7),0 0 34px -12px rgba(23,224,192,.6);
}
.btn-ghost{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 26px;border-radius:10px;font-size:15px;color:var(--hi);
  border:1px solid var(--line-strong);background:transparent;
  transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--hi);transform:translateY(-1px);}
.btn-block{width:100%;}

/* ---------- compare trio ---------- */
.trio{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch;}
.trio-card{
  padding:26px;border-radius:16px;background:var(--ink700);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:14px;
  transition:transform .2s ease-out,border-color .2s ease-out;
}
.trio-card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.trio-card.is-main{
  background:rgba(17,26,36,.6);backdrop-filter:blur(12px);
  border-color:rgba(23,224,192,.35);box-shadow:var(--shadow-glow);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  font-size:12px;letter-spacing:.06em;padding:5px 11px;border-radius:999px;
  border:1px solid rgba(23,224,192,.35);background:rgba(23,224,192,.08);color:var(--cyan);
}
.badge-amber{border-color:rgba(255,180,59,.35);background:rgba(255,180,59,.08);color:var(--amber);}
.badge-rose{border-color:rgba(255,92,122,.35);background:rgba(255,92,122,.08);color:var(--rose);}
.trio-card h3{font-size:18px;}
.trio-card p{color:var(--mid);font-size:14px;line-height:1.85;flex:1;}
.trio-meta{
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding-top:14px;
  font-family:var(--font-mono);font-size:12px;color:var(--lo);
}
.trio-meta b{color:var(--amber);font-weight:600;}

/* ---------- spec rows + image ---------- */
.split{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:center;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.media-card{
  position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-panel);
}
.media-card img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out;filter:saturate(.9);}
.media-card:hover img{transform:scale(1.03);}
.media-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,16,.15) 0%,rgba(6,10,16,.78) 100%);
}
.media-cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  font-size:13px;color:var(--mid);
}
.spec-list{border-top:1px solid var(--line);}
.spec-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:24px;
  padding:16px 2px;border-bottom:1px solid var(--line);
}
.spec-row .s-key{color:var(--mid);font-size:15px;}
.spec-row .s-val{font-family:var(--font-mono);font-size:14px;color:var(--hi);text-align:right;}
.spec-row .s-val.amber{color:var(--amber);}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-item summary{
  display:flex;align-items:center;gap:18px;
  min-height:64px;padding:18px 2px 18px 0;list-style:none;cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-num{font-family:var(--font-mono);font-size:12px;color:var(--amber);flex:none;width:28px;}
.faq-q{font-size:16px;font-weight:600;color:var(--hi);flex:1;line-height:1.6;}
.faq-icon{
  position:relative;width:18px;height:18px;flex:none;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--mid);transition:transform .2s ease-out,background .2s ease-out;
}
.faq-icon::before{left:0;top:8.5px;width:18px;height:1px;}
.faq-icon::after{left:8.5px;top:0;width:1px;height:18px;}
.faq-item[open] .faq-icon::after{transform:scaleY(0);}
.faq-item[open] .faq-icon::before{background:var(--cyan);}
.faq-item summary:hover .faq-q{color:var(--cyan);}
.faq-a{
  padding:0 0 22px 46px;
}
.faq-a p{
  background:rgba(17,26,36,.4);border-radius:12px;padding:18px 20px;
  color:var(--mid);font-size:14.5px;line-height:1.95;
}
.faq-item[open]::before{
  content:"";position:absolute;left:-14px;top:20px;bottom:20px;width:2px;background:var(--cyan);border-radius:2px;
}

/* ---------- cta band ---------- */
.cta-band{
  padding:40px;border-radius:20px;
  background:rgba(17,26,36,.55);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-panel);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);}
.cta-band p{color:var(--mid);font-size:15px;margin-top:10px;max-width:44em;}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--mid);font-size:14px;
  border-bottom:1px solid transparent;transition:color .2s ease-out,border-color .2s ease-out;
}
.link-arrow:hover{color:var(--cyan);border-color:rgba(23,224,192,.5);}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink900);border-top:1px solid var(--line);
  padding:72px 0 34px;margin-top:0;
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.foot-brand p{color:var(--mid);font-size:14px;line-height:1.9;margin-top:16px;max-width:30em;}
.foot-domain{
  margin-top:14px;font-family:var(--font-mono);font-size:12px;color:var(--lo);letter-spacing:.04em;
}
.foot-title{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--lo);margin-bottom:18px;
}
.foot-link{display:block;color:var(--mid);font-size:14px;padding:6px 0;transition:color .2s ease-out;}
a.foot-link:hover{color:var(--cyan);}
.foot-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--lo);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--mid);transition:color .2s ease-out;}
.to-top:hover{color:var(--cyan);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease-out,transform .6s ease-out;}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links,.nav-cta{display:none;}
  .menu-btn{display:block;}
  .flow-grid{grid-template-columns:1fr;gap:40px;}
  .sticky-card{position:static;}
  .trio{grid-template-columns:1fr;}
  .col-5,.col-6,.col-7{grid-column:span 12;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:640px){
  .page-head{padding:126px 0 56px;}
  .sec{padding:64px 0;}
  .sec-tight{padding:52px 0;}
  .sec-head{margin-bottom:30px;}
  .faq-item summary{min-height:56px;gap:12px;}
  .faq-q{font-size:15px;}
  .faq-a{padding-left:0;}
  .faq-item[open]::before{left:-8px;}
  .cta-band{padding:26px;}
  .foot-grid{grid-template-columns:1fr;}
  .timeline{padding-left:28px;}
  .tl-dot{left:-28px;}
  .wave-row{height:40px;}
}

/* roulang page: category3 */
:root{
  --ink900:#060A10;
  --ink800:#0A1018;
  --ink700:#111A24;
  --cyan:#17E0C0;
  --cyan-deep:#0FA890;
  --cyan-soft:rgba(23,224,192,.16);
  --amber:#FFB43B;
  --rose:#FF5C7A;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --hi:#EAF2F8;
  --mid:#9BB0C2;
  --lo:#5F7387;
  --r-panel:20px;
  --r-card:16px;
  --r-btn:10px;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink900);
  color:var(--hi);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.25;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.mono{font-family:var(--mono);letter-spacing:0}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:2;
}
@media (min-width:768px){
  .container{padding:0 32px}
}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,10,16,.72);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--hi);
  white-space:nowrap;
}
.logo-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(23,224,192,.85);
  flex:none;
}
.logo-sub{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.22em;
  color:var(--amber);
  border:1px solid rgba(255,180,59,.35);
  border-radius:999px;
  padding:2px 7px;
  line-height:1.4;
}
.nav-links{display:none}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  font-size:14px;
  color:var(--mid);
  transition:color .2s ease-out;
}
.nav-link::before{
  content:"";
  position:absolute;
  left:-10px;top:50%;
  width:4px;height:4px;
  margin-top:-2px;
  border-radius:50%;
  background:var(--cyan);
  opacity:0;
  transition:opacity .2s ease-out;
}
.nav-link:hover{color:var(--hi)}
.nav-link.is-active{color:var(--hi)}
.nav-link.is-active::before{opacity:1}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-cta{
  display:none;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--hi);
  padding:9px 18px;
  border:1px solid var(--line-strong);
  border-radius:var(--r-btn);
  transition:border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,background .2s ease-out;
}
.nav-cta:hover{
  border-color:rgba(23,224,192,.7);
  background:rgba(23,224,192,.08);
  box-shadow:0 0 24px -10px rgba(23,224,192,.8);
  transform:translateY(-1px);
}
.menu-btn{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:7px;
  width:42px;height:42px;
  padding:0 9px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  cursor:pointer;
  transition:border-color .2s ease-out;
}
.menu-btn:hover{border-color:var(--line-strong)}
.menu-btn span{display:block;height:1px;width:100%;background:var(--hi)}
@media (min-width:640px){
  .nav-cta{display:inline-flex}
}
@media (min-width:1024px){
  .menu-btn{display:none}
  .nav-links{
    display:flex;
    align-items:center;
    gap:36px;
  }
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;
    inset:0;
    z-index:75;
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:104px 28px 48px;
    background:rgba(6,10,16,.96);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    opacity:0;
    transform:translateY(-8px);
    pointer-events:none;
    transition:opacity .22s ease-out,transform .22s ease-out;
    overflow-y:auto;
  }
  .nav-links.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav-link{
    width:100%;
    padding:20px 0;
    font-size:19px;
    color:var(--hi);
    border-bottom:1px solid var(--line);
  }
  .nav-link::before{display:none}
}

/* ============ 页头 ============ */
.page-head{
  position:relative;
  overflow:hidden;
  padding:140px 0 68px;
  background:linear-gradient(180deg,var(--ink900) 0%,var(--ink800) 100%);
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  background-position:center;
  opacity:.2;
  filter:saturate(.45);
}
.page-head::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.11) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,transparent 0%,rgba(0,0,0,.9) 45%,transparent 100%);
  mask-image:linear-gradient(180deg,transparent 0%,rgba(0,0,0,.9) 45%,transparent 100%);
  opacity:.75;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--lo);
  margin-bottom:26px;
}
.breadcrumb a{color:var(--lo);transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--hi)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .now{color:var(--hi)}
.page-head h1{
  font-size:clamp(30px,5vw,48px);
  font-weight:700;
  line-height:1.15;
  max-width:900px;
}
.page-head h1 em{
  font-style:normal;
  color:var(--amber);
  position:relative;
}
.page-head h1 em::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:1px;
  background:rgba(255,180,59,.55);
}
.page-lead{
  margin-top:20px;
  max-width:620px;
  color:var(--mid);
  font-size:17px;
}
.page-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 12px;
  border-radius:999px;
  font-size:13px;
  line-height:1.5;
  border:1px solid rgba(23,224,192,.35);
  background:rgba(23,224,192,.08);
  color:var(--hi);
}
.badge.is-data{
  border-color:rgba(255,180,59,.35);
  background:rgba(255,180,59,.08);
}

/* ============ 通用板块 ============ */
.section{padding:84px 0}
.section.is-alt{background:var(--ink800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:44px;max-width:760px}
.sec-eyebrow{
  font-size:13px;
  letter-spacing:.16em;
  color:var(--amber);
  margin-bottom:12px;
}
.sec-head h2{
  font-size:clamp(24px,3.2vw,32px);
  font-weight:600;
}
.sec-head p{
  margin-top:16px;
  color:var(--mid);
  font-size:16px;
  max-width:700px;
}

/* ============ 数据卡 ============ */
.stat-grid{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:640px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1024px){
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px}
}
.panel{
  background:rgba(17,26,36,.55);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  box-shadow:0 0 0 1px rgba(255,255,255,.06),inset 0 1px 0 rgba(255,255,255,.06),0 24px 60px -30px rgba(0,0,0,.9);
}
.stat-card{padding:28px 26px 24px}
.stat-num{
  font-family:var(--mono);
  font-size:clamp(34px,5vw,48px);
  line-height:1;
  color:var(--amber);
  letter-spacing:0;
}
.stat-num small{font-size:15px;margin-left:6px;color:var(--mid);font-family:var(--sans)}
.stat-label{margin-top:14px;font-size:15px;color:var(--hi);font-weight:600}
.stat-note{margin-top:6px;font-size:12px;color:var(--lo);line-height:1.7}
.wave{
  display:flex;
  align-items:flex-end;
  gap:3px;
  height:26px;
  margin-top:20px;
}
.wave span{
  flex:1;
  background:rgba(23,224,192,.3);
  border-radius:2px;
  min-height:4px;
}

/* ============ 图文分区 ============ */
.media-split{
  display:grid;
  gap:34px;
  align-items:center;
  grid-template-columns:1fr;
}
@media (min-width:1024px){
  .media-split{grid-template-columns:7fr 5fr;gap:56px}
}
.media-copy h2{
  font-size:clamp(24px,3.2vw,32px);
  margin-bottom:18px;
}
.media-copy p{
  color:var(--mid);
  font-size:16px;
  margin-bottom:16px;
}
.mini-list{margin-top:24px;border-top:1px solid var(--line)}
.mini-list li{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:14px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--mid);
}
.mini-list .n{
  font-family:var(--mono);
  font-size:13px;
  color:var(--amber);
}
.media-card{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 24px 60px -30px rgba(0,0,0,.9);
}
.media-card img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  filter:saturate(.85);
  transition:transform .35s ease-out;
}
.media-card:hover img{transform:scale(1.03)}
.media-card::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,10,16,.05) 35%,rgba(6,10,16,.85) 100%);
  pointer-events:none;
}
.media-caption{
  position:absolute;
  left:20px;right:20px;bottom:16px;
  z-index:2;
  font-size:13px;
  color:var(--mid);
}

/* ============ 清单条目 ============ */
.check-list{border-top:1px solid var(--line)}
.check-item{
  display:grid;
  grid-template-columns:52px 1fr;
  gap:18px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:background .2s ease-out;
}
@media (min-width:768px){
  .check-item{grid-template-columns:84px 1fr;gap:24px;padding:30px 0}
}
.check-item:hover{background:rgba(255,255,255,.02)}
.check-num{
  font-family:var(--mono);
  font-size:14px;
  color:var(--amber);
  padding-top:4px;
}
.check-item h3{
  font-size:18px;
  margin-bottom:8px;
}
.check-item p{
  color:var(--mid);
  font-size:15px;
  max-width:760px;
}

/* ============ 对照双栏 ============ */
.compare{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:960px){
  .compare{grid-template-columns:1fr 1fr;gap:24px}
}
.compare-col{
  padding:28px 26px;
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  background:var(--ink700);
}
.compare-col.is-strong{
  background:rgba(17,26,36,.55);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-color:rgba(23,224,192,.45);
  box-shadow:0 0 40px -12px rgba(23,224,192,.35);
}
.compare-col h3{font-size:16px;margin-bottom:6px}
.compare-col .col-note{font-size:13px;color:var(--lo)}
.compare-rows{margin-top:22px;border-top:1px solid var(--line)}
.compare-row{
  display:grid;
  grid-template-columns:14px 1fr;
  gap:12px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--mid);
}
.compare-col.is-strong .compare-row{color:var(--hi)}
.mark{
  width:6px;height:6px;
  border-radius:50%;
  margin-top:9px;
  background:var(--rose);
  flex:none;
}
.is-strong .mark{background:var(--amber)}
.compare-col.is-strong .compare-row em{
  font-style:normal;
  font-family:var(--mono);
  color:var(--amber);
  margin-right:4px;
}

/* ============ 情形卡 ============ */
.case-grid{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:768px){
  .case-grid{grid-template-columns:repeat(2,1fr);gap:24px}
}
.case-card{
  padding:26px 24px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--ink700);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.case-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:0 24px 60px -34px rgba(0,0,0,1);
}
.case-card .idx{
  font-family:var(--mono);
  font-size:13px;
  color:var(--amber);
  display:block;
  margin-bottom:14px;
}
.case-card h3{font-size:17px;margin-bottom:10px}
.case-card p{color:var(--mid);font-size:15px}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:grid;
  grid-template-columns:44px 1fr 20px;
  gap:14px;
  align-items:center;
  min-height:64px;
  padding:20px 0;
  background:none;
  border:0;
  color:var(--hi);
  font-size:16px;
  text-align:left;
  cursor:pointer;
  transition:color .2s ease-out;
}
@media (min-width:768px){
  .faq-q{grid-template-columns:60px 1fr 24px;gap:18px}
}
.faq-idx{font-family:var(--mono);font-size:13px;color:var(--amber);transition:color .2s ease-out}
.faq-item:hover .faq-q{color:#fff}
.faq-icon{position:relative;width:14px;height:14px;justify-self:end}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--mid);
  transition:transform .2s ease-out,background .2s ease-out;
}
.faq-icon::before{left:0;right:0;top:6px;height:1px}
.faq-icon::after{top:0;bottom:0;left:6px;width:1px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-idx{color:var(--cyan)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease-out;
}
.faq-item.is-open .faq-a{max-height:400px}
.faq-a-inner{
  margin:0 0 22px;
  padding:18px 20px;
  border-left:2px solid var(--cyan);
  border-radius:0 12px 12px 0;
  background:rgba(23,224,192,.06);
  color:var(--mid);
  font-size:14.5px;
  line-height:1.9;
}
@media (min-width:768px){
  .faq-a-inner{margin-left:78px}
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:40px 26px;
  border:1px solid var(--line);
  border-radius:24px;
  background:rgba(17,26,36,.55);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 0 0 1px rgba(255,255,255,.06),inset 0 1px 0 rgba(255,255,255,.06),0 24px 60px -30px rgba(0,0,0,.9);
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:240px;height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(23,224,192,.22),transparent 70%);
  pointer-events:none;
}
@media (min-width:900px){
  .cta-band{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:48px 56px;
    gap:40px;
  }
}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:12px}
.cta-band p{color:var(--mid);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;flex:none}

.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 28px;
  border-radius:var(--r-btn);
  border:1px solid rgba(23,224,192,.65);
  background:rgba(23,224,192,.12);
  color:var(--hi);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,border-color .2s ease-out;
  box-shadow:0 0 24px -8px rgba(23,224,192,.6);
}
.btn-primary:hover{
  transform:translateY(-1px);
  background:rgba(23,224,192,.2);
  border-color:var(--cyan);
  box-shadow:0 0 34px -8px rgba(23,224,192,.85);
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 6px;
  background:transparent;
  border:0;
  color:var(--mid);
  font-size:15px;
  cursor:pointer;
  transition:color .2s ease-out;
}
.btn-ghost:hover{color:var(--hi)}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--mid);
  transition:color .2s ease-out,gap .2s ease-out;
}
.link-arrow:hover{color:var(--cyan);gap:12px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:0;
  background:var(--ink900);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.foot-grid{
  display:grid;
  gap:38px;
  grid-template-columns:1fr;
}
@media (min-width:640px){
  .foot-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1024px){
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px}
}
.foot-brand .logo{margin-bottom:16px}
.foot-brand p{color:var(--mid);font-size:14px;max-width:320px}
.foot-domain{
  margin-top:16px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--lo);
}
.foot-title{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lo);
  margin-bottom:18px;
}
.foot-link{
  display:block;
  font-size:14px;
  color:var(--mid);
  margin-bottom:10px;
  transition:color .2s ease-out;
}
a.foot-link:hover{color:var(--hi)}
.foot-bottom{
  margin-top:52px;
  padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 24px;
  justify-content:space-between;
  font-size:13px;
  color:var(--lo);
}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--mid);
  transition:color .2s ease-out;
}
.to-top:hover{color:var(--cyan)}

/* ============ 动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s ease-out,transform .6s ease-out;
}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}