/* roulang page: index */
:root{
  --bg:#0A111F;
  --bg-2:#0E172A;
  --panel:#101C30;
  --card:rgba(20,36,61,.52);
  --card-strong:rgba(25,44,76,.85);
  --text:#EEF3FC;
  --text-2:#B7C5DD;
  --text-3:#8296B3;
  --line:rgba(255,255,255,.08);
  --line-bright:rgba(77,168,255,.38);
  --brand:#4DA8FF;
  --brand-2:#7C6BFF;
  --cyan:#35E0D0;
  --gold:#F5C45B;
  --danger:#F0988D;
  --radius:18px;
  --radius-s:11px;
  --shadow-lg:0 28px 60px rgba(0,0,0,.45);
  --shadow-glow:0 12px 38px rgba(62,150,255,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  background:
    radial-gradient(circle at 12% 8%, rgba(77,168,255,.09), transparent 28rem),
    radial-gradient(circle at 88% 14%, rgba(124,107,255,.08), transparent 30rem),
    var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
  background-image:
    radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    radial-gradient(rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:32px 32px, 48px 48px;
  background-position:0 0, 14px 20px;
  opacity:.4;
}
::selection{background:rgba(53,224,208,.28);color:#fff}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease,background .18s ease}
a:hover{color:#fff}
h1,h2,h3,h4{line-height:1.3;margin:0}
p{margin:0 0 1rem}
img{max-width:100%;height:auto}
button,input,textarea{font:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;margin-inline:auto;padding-inline:clamp(16px,2.6vw,34px)}
.narrow{max-width:780px;margin-inline:auto}
.section{padding:clamp(60px,8vw,96px) 0;position:relative}
.s-tag{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:.18em;color:var(--cyan);
  text-transform:uppercase;font-weight:600;
}
.s-tag::before{content:"";width:24px;height:2px;background:var(--brand);border-radius:2px;box-shadow:0 0 12px rgba(77,168,255,.7)}
.s-tag.is-gold{color:var(--gold)}
.s-head{margin-bottom:clamp(28px,4.5vw,52px)}
.s-head h2{font-size:clamp(23px,3.5vw,34px);font-weight:800;color:var(--text);margin-top:12px;letter-spacing:.01em}
.s-desc{color:var(--text-2);font-size:15px;max-width:720px;margin-top:14px}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  border-radius:12px;padding:10px 18px;font-weight:600;font-size:14px;
  line-height:1.4;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#4DA8FF 0%,#7C6BFF 100%);
  color:#fff;border-color:rgba(255,255,255,.14);
  box-shadow:var(--shadow-glow),inset 0 1px 0 rgba(255,255,255,.22);
}
.btn-primary:hover{
  filter:brightness(1.08);transform:translateY(-2px);
  box-shadow:0 16px 44px rgba(74,150,255,.38),inset 0 1px 0 rgba(255,255,255,.26);color:#fff;
}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 20px rgba(74,150,255,.22)}
.btn-ghost{
  background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text-2);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.07);border-color:var(--brand);color:#fff;transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{height:50px;padding:13px 30px;font-size:16px}
.btn-sm{height:37px;padding:6px 16px;font-size:13px;border-radius:10px}
.btn-block{width:100%}
.btn-download-large{
  width:100%;min-height:58px;justify-content:flex-start;text-align:left;
  background:rgba(12,24,46,.85);border:1px solid var(--line);border-radius:14px;
  color:var(--text-2);padding:14px 18px;gap:16px;
}
.btn-download-large:hover{
  border-color:var(--line-bright);color:#fff;transform:translateY(-2px);
  background:rgba(24,46,85,.8);box-shadow:0 16px 32px rgba(0,0,0,.4);
}
.btn-download-large .os-badge{
  width:40px;height:40px;flex:0 0 40px;border-radius:11px;
  display:grid;place-items:center;font-weight:800;font-size:14px;letter-spacing:.06em;
  background:linear-gradient(145deg,rgba(77,168,255,.28),rgba(124,107,255,.26));
  border:1px solid rgba(255,255,255,.16);color:#fff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.os-meta small{display:block;color:var(--text-3);font-size:12px;font-weight:400;margin-top:4px;letter-spacing:0}

/* Badge */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(77,168,255,.13);border:1px solid rgba(77,168,255,.28);
  color:#BFE0FF;font-size:12px;font-weight:600;border-radius:999px;padding:3px 11px;
}
.badge-gold{
  background:rgba(245,196,91,.13);border-color:rgba(245,196,91,.32);color:#FFE5AC;
}
.badge-cyan{
  background:rgba(53,224,208,.12);border-color:rgba(53,224,208,.28);color:#A5F6EF;
}

/* Header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,17,31,.82);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  min-height:68px;display:flex;align-items:center;gap:20px;
}
.brand{
  display:inline-flex;align-items:center;gap:11px;color:var(--text);
  white-space:nowrap;
}
.brand-mark{
  width:30px;height:30px;border-radius:10px;flex:0 0 30px;
  background:linear-gradient(145deg,#4DA8FF,#7C6BFF);
  display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800;
  box-shadow:0 6px 18px rgba(76,129,255,.35);
}
.brand-name{font-size:1.06rem;font-weight:800;letter-spacing:.02em}
.brand-name em{font-style:normal;color:var(--cyan)}
.main-nav{display:flex;gap:2px;margin-left:auto;align-items:center}
.nav-link{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:38px;padding:7px 14px;border-radius:10px;
  color:var(--text-2);font-weight:500;font-size:14.5px;position:relative;
}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link.is-active{color:#fff;background:rgba(77,168,255,.12)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;box-shadow:0 0 12px rgba(77,168,255,.8);
}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.header-actions .main-nav{margin-left:0}
.search-form{
  position:relative;display:flex;align-items:center;
}
.search-form .search-icon-box{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  display:grid;place-items:center;width:16px;height:16px;pointer-events:none;color:var(--text-3);
}
.search-input{
  width:170px;height:38px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.045);
  padding:0 16px;color:var(--text);font-size:13.5px;
  transition:width .25s var(--ease),border-color .2s,background .2s,box-shadow .2s;
}
.search-input::placeholder{color:var(--text-3)}
.search-input:focus{
  outline:none;width:230px;border-color:rgba(53,224,208,.5);
  background:rgba(9,20,38,.66);box-shadow:0 0 0 4px rgba(53,224,208,.09);
}
.login-link{
  padding:6px 8px;font-size:13.5px;color:var(--text-2);border-radius:8px;font-weight:600;
}
.login-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-toggle{
  display:none;align-items:center;gap:7px;width:44px;height:40px;justify-content:center;
  border-radius:10px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);cursor:pointer;
}
.nav-toggle:hover{color:#fff}
.nav-toggle .burger-line{width:18px;height:2px;background:currentColor;display:block;position:relative}
.nav-toggle .burger-line::before,.nav-toggle .burger-line::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s var(--ease)}
.nav-toggle .burger-line::before{top:-6px}
.nav-toggle .burger-line::after{top:6px}
.nav-toggle[aria-expanded="true"] .burger-line{background:transparent}
.nav-toggle[aria-expanded="true"] .burger-line::before{transform:rotate(45deg);top:0}
.nav-toggle[aria-expanded="true"] .burger-line::after{transform:rotate(-45deg);top:0}
.search-toggle-btn{display:none;width:40px;height:38px;border-radius:10px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);align-items:center;justify-content:center;cursor:pointer}
.search-toggle-btn:hover{color:#fff}

.mobile-nav{
  display:none;border-top:1px solid rgba(255,255,255,.07);
  background:rgba(9,16,31,.98);padding:16px 0 22px;
}
.mobile-nav.open{display:block}
.mobile-nav-inner{display:flex;flex-direction:column;gap:8px}
.mobile-nav-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 16px;border-radius:12px;color:var(--text-2);
  background:rgba(255,255,255,.03);font-weight:600;
}
.mobile-nav-link:hover{color:#fff;background:rgba(77,168,255,.12)}
.mobile-nav-link.is-active{color:#fff;background:rgba(77,168,255,.16);box-shadow:inset 0 0 0 1px rgba(77,168,255,.24)}
.mobile-nav-actions{display:flex;flex-direction:column;gap:10px;margin-top:14px;padding:12px 16px 0}

/* Hero */
.hero{position:relative;padding:clamp(48px,7vw,86px) 0 70px;overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:auto -8% -25% -8%;height:55%;
  background:radial-gradient(ellipse at center,rgba(77,168,255,.15),transparent 62%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(30px,5vw,62px);align-items:center;position:relative;z-index:2;
}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid rgba(53,224,208,.36);background:rgba(53,224,208,.09);
  color:#B7F7F1;border-radius:999px;padding:6px 15px;font-size:12.5px;
  letter-spacing:.14em;box-shadow:inset 0 0 12px rgba(53,224,208,.08);
}
.hero h1{
  font-size:clamp(32px,5vw,52px);line-height:1.2;font-weight:800;
  letter-spacing:-.02em;margin:22px 0 20px;color:#fff;
}
.hero h1 span.h1-accent{
  color:var(--cyan);position:relative;white-space:nowrap;
}
.hero h1 span.h1-accent::after{
  content:"";position:absolute;left:2px;right:2px;bottom:6px;height:10px;
  background:rgba(53,224,208,.13);border-radius:4px;z-index:-1;
}
.hero-lead{
  font-size:clamp(15px,1.4vw,17px);color:var(--text-2);max-width:620px;
  letter-spacing:.01em;margin:0 0 28px;
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.hero-version{
  display:inline-flex;align-items:center;flex-wrap:wrap;gap:10px;
  color:var(--text-3);font-size:12.5px;
}
.hero-version .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);opacity:.6}
.hero-visual{position:relative}
.browser-mock{
  border-radius:18px;background:rgba(15,23,41,.75);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow-lg),0 0 0 1px rgba(77,168,255,.18);
  overflow:hidden;position:relative;
}
.browser-toolbar{
  display:flex;align-items:center;gap:7px;height:42px;padding:0 15px;
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.045);
}
.browser-dot{width:10px;height:10px;border-radius:50%}
.browser-dot:nth-child(1){background:#FF5E57}
.browser-dot:nth-child(2){background:#FFC048}
.browser-dot:nth-child(3){background:#33D69F}
.browser-address{
  margin-left:10px;height:25px;flex:1;border-radius:7px;background:rgba(9,18,35,.72);
  display:flex;align-items:center;padding:0 10px;color:var(--text-3);font-size:11px;
}
.browser-body{position:relative}
.browser-body img{display:block;width:100%;aspect-ratio:16/8;object-fit:cover}
.browser-body::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 68%,rgba(10,17,31,.55));
}
.float-chip{
  position:absolute;left:16px;bottom:16px;z-index:3;
  background:rgba(10,17,31,.7);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.16);border-radius:15px;
  padding:10px 15px;box-shadow:0 14px 30px rgba(0,0,0,.34);
  display:flex;align-items:center;gap:10px;
}
.float-chip .state-ico{width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(53,224,208,.14);}
.float-chip span{font-size:12.5px;color:#DDEBFA;font-weight:600}
.hero-echo{
  position:absolute;right:-34px;top:-34px;width:130px;height:130px;z-index:0;
  border:1px solid rgba(77,168,255,.22);border-radius:50%;
  background:radial-gradient(circle,rgba(77,168,255,.08),transparent 68%);
  pointer-events:none;
}

/* Showcase carousel */
.showcase{background:linear-gradient(180deg,rgba(14,23,42,.72),rgba(10,17,31,0));border-top:1px solid rgba(255,255,255,.05)}
.showcase-grid{display:grid;grid-template-columns:.6fr 1.4fr;gap:44px;align-items:center}
.showcase-intro .s-head{margin-bottom:22px}
.showcase-feature-list{margin:22px 0 0;padding:0;list-style:none;display:grid;gap:10px}
.showcase-feature-list li{border-left:2px solid var(--brand);padding-left:14px;color:var(--text-2);font-size:14px;background:rgba(255,255,255,.03);border-radius:0 10px 10px 0;padding:9px 13px}
.stage-main{position:relative;overflow:hidden;border-radius:20px;border:1px solid rgba(255,255,255,.12);box-shadow:0 22px 55px rgba(0,0,0,.45);background:rgba(18,31,56,.55)}
.slide-track{display:flex;transition:transform .55s var(--ease);will-change:transform}
.slide{flex:0 0 100%;position:relative;min-width:0}
.slide img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.slide-cap{
  position:absolute;left:16px;bottom:15px;z-index:2;
  background:rgba(10,17,31,.72);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.14);border-radius:13px;
  padding:8px 14px;font-size:13px;font-weight:600;color:#F1F7FF;
  display:inline-flex;align-items:center;gap:8px;
}
.slide-cap::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.sc-btn{
  position:absolute;top:48%;transform:translateY(-50%);z-index:5;
  width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.2);
  background:rgba(10,17,31,.72);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  color:#fff;font-size:24px;line-height:1;cursor:pointer;
  display:grid;place-items:center;transition:background .2s,border-color .2s,box-shadow .2s;
}
.sc-btn:hover{background:rgba(50,94,150,.5);border-color:var(--brand);box-shadow:0 0 22px rgba(77,168,255,.25)}
.sc-prev{left:14px}
.sc-next{right:14px}
.sc-dots{display:flex;justify-content:center;gap:8px;margin-top:16px}
.sc-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.18);border:0;cursor:pointer;padding:0;transition:background .2s,width .25s var(--ease),box-shadow .2s}
.sc-dot.is-active{width:24px;border-radius:8px;background:var(--brand);box-shadow:0 0 12px rgba(77,168,255,.7)}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(315px,1fr));gap:22px}
.news-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:18px;overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s,border-color .2s;
  box-shadow:0 12px 24px rgba(0,0,0,.22);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(77,168,255,.25);box-shadow:0 20px 44px rgba(0,0,0,.38),0 0 0 1px rgba(77,168,255,.12)}
.news-thumb{display:block;overflow:hidden;position:relative;background:var(--bg-2)}
.news-thumb img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .6s var(--ease);display:block}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-thumb::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);border-radius:inherit}
.news-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:11px}
.news-meta time{font-size:12px;color:var(--text-3)}
.news-body h3{font-size:16.5px;font-weight:700;margin-bottom:9px;line-height:1.5}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{
  color:var(--text-2);font-size:13.5px;line-height:1.7;margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-more{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:13px;
}
.card-more:hover{color:#fff}
.news-more-btn{margin-top:38px;text-align:center}
.empty-tip{
  border:1px dashed var(--line-bright);border-radius:18px;
  padding:56px 20px;text-align:center;color:var(--text-3);
  background:rgba(255,255,255,.025);
}

/* System requirement */
.sysreq{background:linear-gradient(180deg,rgba(17,28,50,.5),rgba(10,17,31,.2))}
.req-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
.req-panel{
  background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px;
  position:relative;overflow:hidden;
}
.req-panel::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand);box-shadow:0 0 16px rgba(77,168,255,.5)}
.req-panel.is-recommend::before{background:linear-gradient(90deg,#35E0D0,#7C6BFF)}
.req-title{display:flex;align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid rgba(255,255,255,.08);padding-bottom:16px;margin-bottom:18px}
.req-title h3{font-size:19px;font-weight:800}
.req-title .req-mode{font-size:12px;color:var(--text-3);font-weight:600;letter-spacing:.1em}
.req-list{list-style:none;padding:0;margin:0;display:grid;gap:13px}
.req-list li{display:flex;gap:13px;align-items:flex-start;color:var(--text-2);font-size:14px}
.req-list .req-ico{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  border-radius:10px;background:rgba(77,168,255,.12);color:var(--brand);
  border:1px solid rgba(77,168,255,.18);font-size:13px;font-weight:800;
}
.req-list b{color:var(--text);font-weight:700}
.req-list .val{color:var(--text-2)}
.compat-bar{
  margin-top:26px;padding:16px 20px;border-radius:14px;
  border:1px solid rgba(53,224,208,.28);background:rgba(53,224,208,.07);
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  color:#A5F6EF;font-size:13.5px;
}
.compat-bar a{color:#E7FFFF;font-weight:600}
.compat-bar a:hover{color:#fff}

/* Reviews */
.review-wall{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:start}
.review-col{display:grid;gap:20px}
.review-card{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:20px 19px 16px;position:relative;transition:transform .24s var(--ease),box-shadow .24s,border-color .2s;
  box-shadow:0 12px 28px rgba(0,0,0,.22);border-top:2px solid var(--brand);
}
.review-card.tone-cyan{border-top-color:var(--cyan)}
.review-card.tone-gold{border-top-color:var(--gold)}
.review-card.tone-purple{border-top-color:var(--brand-2)}
.review-card:hover{transform:translateY(-4px);box-shadow:0 20px 42px rgba(0,0,0,.35);border-color:rgba(255,255,255,.18)}
.review-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}
.review-stars{color:var(--gold);letter-spacing:2px;font-size:13px}
.review-platform{font-size:11.5px;color:var(--text-3);border:1px solid rgba(255,255,255,.12);padding:2px 9px;border-radius:999px}
.review-card p{font-size:13.8px;line-height:1.75;color:var(--text-2);margin:0}
.review-foot{
  display:flex;align-items:center;gap:8px;margin-top:16px;padding-top:13px;
  border-top:1px dashed rgba(255,255,255,.1);color:var(--text-3);font-size:12px;
}
.review-avatar{
  width:22px;height:22px;border-radius:50%;flex:0 0 22px;
  background:linear-gradient(145deg,rgba(77,168,255,.5),rgba(124,107,255,.5));
  border:1px solid rgba(255,255,255,.18);
}

/* Download */
.download-zone{position:relative}
.download-panel{
  background:linear-gradient(160deg,rgba(18,34,65,.86),rgba(15,24,44,.9));
  border:1px solid rgba(255,255,255,.12);border-radius:26px;
  overflow:hidden;box-shadow:0 28px 80px rgba(0,0,0,.5);
  display:grid;grid-template-columns:1.5fr .8fr;gap:0;
}
.download-panel::before{
  content:"";position:absolute;inset:-150px auto auto -100px;width:380px;height:380px;
  background:radial-gradient(circle,rgba(77,168,255,.18),transparent 68%);pointer-events:none;
}
.download-main{padding:clamp(26px,4vw,50px);position:relative}
.download-qr-side{
  border-left:1px dashed rgba(255,255,255,.12);padding:clamp(24px,3.5vw,44px);
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:18px;
  text-align:center;background:rgba(10,17,31,.3);
}
.qr-card{
  width:168px;height:168px;border-radius:20px;background:#fff;
  padding:13px;display:grid;place-items:center;
  box-shadow:0 18px 40px rgba(0,0,0,.35),0 0 0 4px rgba(255,255,255,.08);
  border:1px solid rgba(10,17,31,.4);
}
.qr-mock{
  width:100%;height:100%;border-radius:8px;
  background:
    linear-gradient(90deg,rgba(0,0,0,.2) 20%,transparent 20% 25%,transparent 75%,rgba(0,0,0,.2) 75%),
    linear-gradient(rgba(0,0,0,.2) 30%,transparent 30% 45%,transparent 55%,rgba(0,0,0,.2) 55%),
    repeating-linear-gradient(90deg,transparent 0 8px,rgba(0,0,0,.12) 8px 9px);
  background-color:#fff;
}
.trust-row{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:24px}
.trust-item{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--text-3)}
.trust-item svg{color:var(--cyan)}
.download-sub-links{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;margin-top:16px;font-size:13px}

/* FAQ */
.faq-list{display:grid;gap:13px;max-width:880px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:border-color .2s,box-shadow .2s,background .2s;
}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  cursor:pointer;padding:20px 22px;font-weight:700;color:var(--text);
  transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:rgba(255,255,255,.035)}
.faq-marker{
  flex:0 0 26px;width:26px;height:26px;border-radius:9px;
  background:rgba(77,168,255,.13);border:1px solid rgba(77,168,255,.3);
  display:grid;place-items:center;color:var(--brand);font-weight:600;transition:transform .2s var(--ease);
}
.faq-marker svg{width:12px;height:12px}
.faq-item[open]{
  border-color:rgba(77,168,255,.35);
  box-shadow:0 18px 36px rgba(0,0,0,.25),0 0 0 3px rgba(77,168,255,.06);
}
.faq-item[open] .faq-marker{transform:rotate(45deg);background:var(--brand);color:#fff;border-color:var(--brand)}
.faq-body{padding:0 22px 22px;color:var(--text-2);border-top:1px dashed rgba(255,255,255,.1);margin-top:-4px;padding-top:16px}
.faq-body p{margin-bottom:.6rem}
.faq-foot{text-align:center;margin-top:26px}

/* Bottom CTA */
.bottom-cta{
  margin-top:clamp(28px,5vw,60px);border-radius:24px;
  background:radial-gradient(circle at 15% 0%,rgba(77,168,255,.2),transparent 48%),
              radial-gradient(circle at 95% 100%,rgba(124,107,255,.16),transparent 48%),
              rgba(14,23,44,.8);
  border:1px solid rgba(255,255,255,.12);box-shadow:var(--shadow-lg);
  padding:clamp(28px,5vw,58px);text-align:center;
}
.bottom-cta h2{font-size:clamp(23px,3vw,33px);font-weight:800;margin-bottom:12px}
.bottom-cta p{color:var(--text-2);max-width:620px;margin:0 auto 26px}
.bottom-cta .cta-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* Footer */
.site-footer{
  margin-top:60px;background:#070D17;border-top:3px double rgba(77,168,255,.18);
}
.footer-top{
  padding:62px 0 36px;display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:36px;
}
.footer-brand-name{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:#fff}
.footer-brand-name .brand-mark{font-size:14px}
.footer-brand-text{color:var(--text-3);font-size:13.5px;max-width:300px;margin-top:18px}
.footer-col h4{font-size:14px;letter-spacing:.14em;color:#fff;margin:0 0 18px;font-weight:700}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.footer-links a{color:var(--text-2);font-size:13.5px}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-contact-row{display:flex;gap:10px;align-items:center;color:var(--text-2);font-size:13.5px;margin-bottom:12px}
.contact-ico{width:29px;height:29px;border-radius:9px;flex:0 0 29px;display:grid;place-items:center;background:rgba(77,168,255,.12);color:var(--brand);border:1px solid rgba(77,168,255,.22)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  color:var(--text-3);font-size:12.5px;
}
.footer-bottom .copyright{color:var(--text-2)}

/* Responsive */
@media (max-width: 1180px){
  .header-actions .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-nav{display:none}
  .showcase-grid{grid-template-columns:.5fr 1.5fr}
}
@media (max-width: 990px){
  .header-inner .main-nav{display:none}
  .header-actions .login-link{display:none}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{max-width:720px}
  .showcase-grid{grid-template-columns:1fr;gap:32px}
  .review-wall{grid-template-columns:1fr 1fr}
  .download-panel{grid-template-columns:1fr}
  .download-qr-side{border-left:0;border-top:1px dashed rgba(255,255,255,.12)}
  .footer-top{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width: 760px){
  .search-form,.search-toggle-btn{display:none}	
  .search-toggle-btn{display:inline-flex}
  .header-actions .btn-primary{font-size:13px;padding-left:14px;padding-right:14px}
  .brand-name{font-size:.98rem}
  .req-cards{grid-template-columns:1fr}
  .review-wall{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{justify-content:center;text-align:center}
  .hero-version{font-size:11.5px}
  .faq-item summary{font-size:15px}
  .float-chip{left:10px;bottom:10px}
}
@media (max-width: 520px){
  .header-inner{gap:10px}
  .brand-mark{width:27px;height:27px;flex-basis:27px;font-size:13px}
  .brand-name{font-size:.9rem;letter-spacing:-.01em}
  .header-actions .btn-primary .hide-sm{display:none}
  .search-toggle-btn{width:36px}
  .hero{padding-top:36px}
  .hero h1{letter-spacing:-.01em}
  .btn-lg{width:100%}
  .hero-cta .btn-lg{max-width:none}
  .download-main{padding:20px}
  .s-head h2{line-height:1.32}
}

/* roulang page: article */
:root {
  --bg: #0a111f;
  --bg-2: #101c30;
  --bg-3: #14243d;
  --panel: rgba(22, 38, 64, 0.76);
  --panel-solid: #14243d;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(157, 194, 255, 0.35);
  --text: #eef3fc;
  --text-2: #c6d2e8;
  --muted: #8ea3c3;
  --weak: #7084a4;
  --brand: #4da8ff;
  --purple: #7c6bff;
  --cyan: #35e0d0;
  --amber: #f5c45b;
  --danger: #ff7a6e;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 24px 70px rgba(2, 8, 22, 0.4);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 15% 8%, rgba(53, 224, 208, 0.07), transparent 26%),
    radial-gradient(circle at 88% 4%, rgba(124, 107, 255, 0.08), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23n)' opacity='.2'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  cursor: pointer;
}

ul,
ol {
  list-style-position: inside;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(10, 17, 31, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(122, 156, 211, 0.14);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding: 4px 2px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--purple));
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  box-shadow: 0 0 20px rgba(77, 168, 255, 0.28);
}

.brand-word {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
}

.nav-link {
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--muted);
  transition: color .2s ease, background .2s ease, box-shadow .2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(77, 168, 255, 0.1);
  outline: none;
}

.nav-link.active {
  color: var(--text);
  background: transparent;
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 11px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  transition: box-shadow .2s ease, border-color .2s ease, width .2s ease;
}

.header-search:focus-within {
  border-color: rgba(53, 224, 208, 0.75);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, 0.12);
}

.header-search .search-icon {
  color: var(--muted);
  display: inline-flex;
  flex-shrink: 0;
}

.header-search input {
  width: 120px;
  border: 0;
  background: transparent;
  color: var(--text);
  outline: none;
  font-size: 13px;
  transition: width .25s ease;
}

.header-search input:focus {
  width: 180px;
}

.header-search input::placeholder {
  color: var(--weak);
}

.login-link {
  padding: 7px 8px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
}

.login-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .2s ease, color .2s ease, border-color .2s ease, background .2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--purple));
  color: #fff;
  box-shadow: 0 8px 26px rgba(77, 168, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(77, 168, 255, 0.34);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 4px 14px rgba(77, 168, 255, 0.2);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  color: #fff;
  border-color: rgba(77, 168, 255, 0.7);
  background: rgba(255, 255, 255, 0.06);
}

.header-cta {
  height: 38px;
  padding: 0 18px;
  border-radius: 999px;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.035);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-2);
  border-radius: 4px;
  transition: transform .25s ease, opacity .25s ease;
}

.nav-toggle.open span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

/* breadcrumb */
.article-masthead {
  position: relative;
  min-height: 170px;
  background-size: cover;
  background-position: center;
  padding: 62px 0 52px;
  border-bottom: 1px solid var(--line);
}

.article-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 17, 31, 0.72), rgba(10, 17, 31, 0.55) 60%, rgba(10, 17, 31, 0.92)),
    radial-gradient(circle at 70% 10%, rgba(53, 224, 208, 0.1), transparent 40%);
}

.breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumb a {
  color: var(--text-2);
  transition: color .2s ease;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.breadcrumb .sep {
  color: var(--weak);
}

.breadcrumb .current {
  color: #fff;
}

/* article main */
.article-page {
  padding-bottom: 40px;
}

.article-shell {
  position: relative;
  z-index: 3;
  width: min(920px, calc(100% - 32px));
  margin: -28px auto 0;
  background: linear-gradient(180deg, rgba(20, 36, 61, 0.93), rgba(14, 24, 43, 0.97));
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 48px 56px 40px;
}

.article-header {
  padding-bottom: 22px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.article-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-2);
}

.chip-amber {
  color: var(--amber);
  border-color: rgba(245, 196, 91, 0.35);
  background: rgba(245, 196, 91, 0.08);
}

.article-header h1 {
  font-size: clamp(28px, 4.2vw, 42px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
  margin-bottom: 18px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.article-meta .meta-i {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--weak);
}

.article-content {
  color: var(--text-2);
  font-size: 16px;
}

.article-content > :first-child {
  margin-top: 0;
}

.article-content p {
  margin: 1.25em 0;
  color: #c8d5eb;
}

.article-content h2 {
  font-size: 24px;
  color: #fff;
  font-weight: 700;
  margin: 2.2em 0 .7em;
  padding-left: 14px;
  border-left: 4px solid var(--brand);
}

.article-content h3 {
  font-size: 20px;
  color: var(--text);
  font-weight: 700;
  margin: 1.8em 0 .6em;
}

.article-content ul,
.article-content ol {
  padding-left: 1.25em;
  color: #c8d5eb;
}

.article-content li {
  margin: 0.45em 0;
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 18px 24px;
  border: 1px solid rgba(77, 168, 255, 0.22);
  border-left: 4px solid var(--brand);
  border-radius: 8px 18px 18px 8px;
  background: rgba(77, 168, 255, 0.06);
  color: #e2ebfb;
}

.article-content code {
  background: rgba(255, 255, 255, 0.12);
  padding: 3px 7px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--cyan);
}

.article-content pre {
  background: #0a101d;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: 14px;
  overflow-x: auto;
  margin: 1.6em 0;
}

.article-content img {
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin: 2em 0;
}

.article-content a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-content a:hover {
  color: var(--cyan);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 34px 0 0;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.article-tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
}

.btn-sm {
  height: 40px;
  padding: 0 16px;
  font-size: 13.5px;
  border-radius: 999px;
}

/* related */
.related-section {
  max-width: 1080px;
  margin: 70px auto 0;
  padding: 0 24px;
}

.related-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.related-head h2 {
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 800;
  color: #fff;
}

.related-more {
  font-size: 14px;
  color: var(--muted);
  transition: color .2s ease;
}

.related-more:hover {
  color: var(--cyan);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px rgba(3, 8, 18, 0.35);
  border-color: rgba(77, 168, 255, 0.42);
}

.related-cover {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background-color: #1a2540;
}

.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.related-card:hover .related-cover img {
  transform: scale(1.04);
}

.related-body {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.related-body h3 {
  font-size: 16.5px;
  line-height: 1.5;
  font-weight: 700;
  color: #eaf1ff;
}

.related-body p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
}

.related-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--weak);
  font-size: 12.5px;
}

.related-meta .tag {
  color: var(--amber);
}

/* cta band */
.article-cta {
  max-width: 1080px;
  margin: 50px auto 0;
  padding: 0 24px;
}

.cta-panel {
  border-radius: 24px;
  background:
    radial-gradient(circle at 85% 20%, rgba(53, 224, 208, 0.12), transparent 35%),
    radial-gradient(circle at 10% 90%, rgba(124, 107, 255, 0.13), transparent 30%),
    linear-gradient(135deg, rgba(23, 45, 78, .92), rgba(15, 25, 45, .98));
  border: 1px solid rgba(138, 180, 245, .18);
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 26px;
}

.cta-panel h2 {
  font-size: clamp(21px, 3vw, 26px);
  color: #fff;
  margin-bottom: 8px;
  font-weight: 800;
}

.cta-panel p {
  color: var(--text-2);
  font-size: 14.5px;
  max-width: 560px;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta-buttons .btn {
  height: 44px;
  padding: 0 22px;
  border-radius: 999px;
}

/* not found */
.notfound-panel {
  width: min(720px, calc(100% - 32px));
  margin: 80px auto;
  text-align: center;
  padding: 64px 36px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.notfound-panel h1 {
  font-size: 30px;
  color: #fff;
  margin-bottom: 18px;
}

.notfound-panel p {
  color: var(--muted);
  margin-bottom: 26px;
}

/* footer */
.site-footer {
  margin-top: 80px;
  background: #070d17;
  border-top: 1px solid rgba(244, 196, 91, 0.2);
  padding: 52px 0 0;
  font-size: 14px;
}

.site-footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 32px;
  padding-bottom: 40px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 14px;
}

.footer-brand-name .brand-mark {
  width: 26px;
  height: 26px;
  font-size: 15px;
}

.footer-brand-text {
  color: var(--muted);
  line-height: 1.8;
  max-width: 360px;
}

.footer-col h4 {
  color: #d9e3f5;
  font-size: 14.5px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: .02em;
}

.footer-links {
  display: grid;
  gap: 9px;
  list-style: none;
  color: var(--muted);
}

.footer-links a {
  color: var(--muted);
  transition: color .2s ease, padding-left .2s ease;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 3px;
}

.footer-contact-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13.5px;
}

.contact-ico {
  color: var(--cyan);
  display: inline-flex;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  color: #596b88;
  font-size: 12.5px;
}

.footer-bottom .copyright {
  color: #7d90ae;
}

/* responsive */
@media (max-width: 1100px) {
  .header-search input {
    width: 92px;
  }

  .header-search input:focus {
    width: 130px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 920px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-top: 8px;
    padding-bottom: 8px;
    gap: 8px 12px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .header-actions {
    margin-left: 0;
  }

  .header-search {
    display: none;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 4px);
    left: 16px;
    right: 16px;
    z-index: 996;
    background: rgba(11, 19, 36, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 18px;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 6px;
    padding: 14px;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.44);
  }

  .main-nav.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-link {
    padding: 13px 16px;
    font-size: 15px;
  }

  .login-link {
    display: none;
  }

  .header-cta {
    height: 40px;
    padding: 0 15px;
  }

  .article-shell {
    padding: 36px 28px;
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-word {
    font-size: 15.5px;
  }

  .article-masthead {
    min-height: 150px;
    padding: 46px 0 42px;
  }

  .article-shell {
    width: calc(100% - 24px);
    margin-top: -26px;
    padding: 28px 20px 30px;
  }

  .article-header h1 {
    font-size: 25px;
  }

  .article-meta {
    gap: 10px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    padding: 28px 22px;
  }

  .cta-panel .btn {
    width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    justify-content: center;
  }

  .notfound-panel {
    padding: 46px 22px;
    margin-top: 50px;
  }

  .related-head {
    align-items: center;
  }

  .article-actions .btn {
    width: 100%;
  }
}

/* roulang page: category2 */
:root {
  --bg-deep: #0a0f19;
  --bg-page: #10141f;
  --bg-panel: #141b2b;
  --bg-card: rgba(255, 255, 255, 0.045);
  --bg-card-strong: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.065);
  --text-main: #eef3f8;
  --text-soft: #b3c0d6;
  --text-dim: #7f8fac;
  --blue: #4da8ff;
  --blue-bright: #77c1ff;
  --purple: #8a7dff;
  --cyan: #41d8ca;
  --amber: #f2c268;
  --danger: #e2877d;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-card: 0 14px 32px rgba(0, 0, 0, 0.22);
  --shadow-hover: 0 18px 38px rgba(0, 0, 0, 0.32);
  --header-height: 68px;
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Lantinghei SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

input {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  color: var(--text-main);
}

button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 2px solid rgba(77, 168, 255, 0.75);
  outline-offset: 3px;
  border-radius: 8px;
}

::selection {
  background: rgba(77, 168, 255, 0.3);
  color: white;
}

.section {
  padding: 84px 0;
  scroll-margin-top: 80px;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.section-head {
  max-width: 760px;
  margin-bottom: 42px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: .12em;
  font-size: 13px;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--cyan);
  display: inline-block;
  box-shadow: 0 0 12px rgba(65, 216, 202, 0.6);
}

.section-title {
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 700;
  letter-spacing: .01em;
}

.section-desc {
  color: var(--text-soft);
  margin-top: 14px;
  max-width: 720px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-weight: 600;
  line-height: 1;
  padding: 12px 22px;
  white-space: nowrap;
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease;
}

.btn svg {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(120deg, #4da8ff 0%, #7c6bff 100%);
  color: #fff;
  box-shadow: 0 8px 28px rgba(96, 124, 255, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(96, 124, 255, 0.44);
  filter: brightness(1.06);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-main);
}

.btn-ghost:hover {
  border-color: var(--blue);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.btn-lg {
  height: 50px;
  padding: 0 30px;
  font-size: 16px;
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(8, 13, 24, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--header-height);
}

.brand-site {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  margin-right: 10px;
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex: none;
  border-radius: 9px;
  background: linear-gradient(135deg, #4da8ff 0%, #7c6bff 100%);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(74, 112, 255, .35);
}

.brand-name {
  font-size: 17px;
  white-space: nowrap;
  font-weight: 700;
  letter-spacing: .015em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-right: auto;
}

.nav-link {
  position: relative;
  color: var(--text-soft);
  font-weight: 500;
  font-size: 14px;
  white-space: nowrap;
  padding: 8px 2px;
  transition: color .2s ease;
}

.nav-link:hover {
  color: #fff;
}

.nav-link.active {
  color: #fff;
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  box-shadow: 0 0 10px rgba(77, 168, 255, 0.8);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-form {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  transition: width .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.search-form input {
  width: 130px;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 13px;
  transition: width .25s ease;
}

.search-form input::placeholder {
  color: var(--text-dim);
}

.search-form:focus-within {
  border-color: rgba(65, 216, 202, .7);
  box-shadow: 0 0 18px rgba(65, 216, 202, .14);
}

.search-form:focus-within input {
  width: 165px;
}

.search-form svg {
  width: 15px;
  height: 15px;
  color: var(--text-dim);
  flex: none;
}

.login-link {
  color: var(--text-soft);
  font-size: 14px;
  white-space: nowrap;
  transition: color .2s ease;
}

.login-link:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.menu-toggle,
.search-toggle {
  display: none;
}

/* ---------- Hero ---------- */
.announce-hero {
  position: relative;
  padding: 100px 0 92px;
  overflow: hidden;
}

.announce-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(circle at 24% 25%, rgba(0, 0, 0, 0.9), transparent 60%);
  mask-image: radial-gradient(circle at 24% 25%, rgba(0, 0, 0, 0.9), transparent 60%);
  opacity: .5;
  pointer-events: none;
}

.announce-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center 18%;
  opacity: .16;
  z-index: -2;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  width: 380px;
  height: 380px;
  right: 5%;
  top: 3%;
  background: radial-gradient(circle, rgba(124, 107, 255, 0.22) 0%, rgba(124, 107, 255, 0) 68%);
  z-index: -1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 52px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-info .eyebrow {
  color: var(--amber);
}

.hero-info .eyebrow::before {
  background: var(--amber);
  box-shadow: 0 0 12px rgba(242, 194, 104, .6);
}

.hero-title {
  font-size: clamp(32px, 4.5vw, 50px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 4px 0 20px;
}

.hero-title .accent {
  position: relative;
  color: var(--blue-bright);
  z-index: 0;
  white-space: nowrap;
}

.hero-title .accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 10px;
  z-index: -1;
  background: linear-gradient(90deg, rgba(77, 168, 255, 0.32), rgba(124, 107, 255, 0.32));
  border-radius: 4px;
}

.hero-lead {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.9;
  max-width: 620px;
}

.hero-meta-note {
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-meta-note svg {
  width: 16px;
  height: 16px;
  flex: none;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
}

.release-card {
  max-width: 390px;
  width: 100%;
  margin-left: auto;
  padding: 26px;
  border-radius: var(--radius-lg);
  background: rgba(13, 20, 36, .82);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.release-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), var(--blue), var(--purple));
}

.release-stamp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--amber);
  border: 1px solid rgba(242, 194, 104, .5);
  border-radius: 999px;
  padding: 3px 10px;
  letter-spacing: .1em;
  background: rgba(242, 194, 104, .1);
}

.release-platform {
  color: var(--text-soft);
  font-size: 13px;
  margin-top: 18px;
  letter-spacing: .02em;
}

.release-version {
  font-size: 46px;
  font-weight: 800;
  margin-top: 2px;
  letter-spacing: -0.02em;
  color: #fff;
}

.release-version .small {
  font-size: 18px;
  color: var(--text-dim);
  font-weight: 500;
}

.release-list {
  margin: 21px 0 19px;
  display: grid;
  gap: 11px;
}

.release-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text-soft);
  font-size: 13px;
}

.release-list svg {
  width: 14px;
  height: 14px;
  color: var(--cyan);
  flex: none;
}

.release-btn {
  width: 100%;
}

/* ---------- Notice Categories ---------- */
.guide-intro {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 25px;
  justify-content: space-between;
}

.guide-intro .section-head {
  margin-bottom: 0;
}

.guide-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 22px;
  margin-top: 42px;
}

.guide-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02));
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.guide-card:hover {
  transform: translateY(-4px);
  border-color: rgba(77, 168, 255, .6);
  box-shadow: var(--shadow-hover);
}

.guide-card--wide {
  grid-column: span 2;
  grid-template-columns: 1.1fr 0.9fr;
}

.guide-thumb {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4 / 2.8;
  min-width: 0;
}

.guide-thumb--sm {
  aspect-ratio: 4 / 3;
}

.guide-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 25px rgba(0, 0, 0, 0.4);
}

.guide-number {
  position: absolute;
  left: 10px;
  bottom: 10px;
  color: white;
  z-index: 2;
  font-weight: 800;
  font-size: 18px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .8);
}

.guide-title {
  font-size: 19px;
  font-weight: 700;
  margin-top: 3px;
}

.guide-desc {
  margin-top: 9px;
  color: var(--text-soft);
  font-size: 14px;
}

.guide-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 15px;
  color: var(--blue-bright);
  font-size: 14px;
  transition: gap .2s ease, color .2s ease;
}

.guide-btn:hover {
  gap: 9px;
  color: #fff;
}

/* ---------- Update steps ---------- */
.update-steps {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(17, 25, 41, 0.75);
  padding: 36px;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  overflow: hidden;
}

.update-steps::before {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 168, 255, .12), transparent 68%);
  top: -180px;
  right: -100px;
  pointer-events: none;
}

.step-item {
  position: relative;
}

.step-num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  border: 1px solid rgba(65, 216, 202, .35);
  background: rgba(65, 216, 202, .08);
  border-radius: 999px;
  padding: 2px 11px;
  display: inline-block;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  margin-top: 15px;
}

.step-text {
  margin-top: 8px;
  color: var(--text-soft);
  font-size: 13px;
}

.step-arrow {
  position: absolute;
  right: -18px;
  top: 22px;
  color: var(--text-dim);
}

@media (max-width: 1099px) {
  .step-arrow {
    display: none;
  }
}

/* ---------- Latest anns ---------- */
.latest-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.latest-list {
  display: grid;
  gap: 14px;
  margin-top: 44px;
}

.ann-item {
  display: grid;
  grid-template-columns: 132px 1fr 180px auto;
  gap: 24px;
  padding: 24px 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.035);
  border-radius: 18px;
  transition: transform .24s ease, border-color .24s ease, background .24s ease;
  align-items: center;
}

.ann-item:hover {
  transform: translateY(-3px);
  border-color: rgba(77, 168, 255, .5);
  background: rgba(255, 255, 255, 0.06);
}

.ann-date {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  border-right: 1px solid var(--line);
  padding-right: 18px;
}

.ann-date .d {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--amber);
}

.ann-date .m {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

.ann-tag {
  grid-column: 1 / 2;
  font-size: 12px;
  color: var(--blue-bright);
  border: 1px solid rgba(77, 168, 255, .4);
  background: rgba(77, 168, 255, .1);
  border-radius: 999px;
  padding: 1px 9px;
  align-self: start;
  white-space: nowrap;
}

.ann-content {
  min-width: 0;
}

.ann-title {
  font-size: 17px;
  font-weight: 700;
  transition: color .2s ease;
}

.ann-title a:hover {
  color: var(--blue-bright);
}

.ann-summary {
  color: var(--text-soft);
  font-size: 13px;
  margin-top: 7px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ann-detail {
  justify-self: end;
  color: var(--text-soft);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  border: 1px solid var(--line);
  padding: 7px 13px;
  border-radius: 999px;
  transition: border-color .2s ease, color .2s ease;
  white-space: nowrap;
}

.ann-detail:hover {
  border-color: var(--blue);
  color: #fff;
}

.ann-item:first-child .ann-date {
  position: relative;
}

.ann-item:first-child .ann-date::after {
  content: "置顶";
  font-size: 11px;
  color: var(--amber);
  background: rgba(242, 194, 104, .12);
  border: 1px solid rgba(242, 194, 104, .3);
  border-radius: 100px;
  padding: 1px 7px;
  margin-top: 8px;
}

.archive-link {
  margin-top: 18px;
  text-align: right;
}

.archive-link a {
  font-size: 13px;
  color: var(--text-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.archive-link a:hover {
  color: #fff;
  border-color: var(--blue);
}

/* ---------- Reminder ---------- */
.reminder {
  margin-top: 44px;
  border-left: 3px solid var(--amber);
  background: rgba(242, 194, 104, 0.055);
  border-radius: 10px 20px 20px 10px;
  padding: 18px 22px;
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.reminder svg {
  width: 19px;
  color: var(--amber);
  flex: none;
  margin-top: 2px;
}

.reminder h3 {
  font-size: 17px;
}

.reminder p {
  color: var(--text-soft);
  margin-top: 4px;
  font-size: 14px;
}

/* ---------- FAQ ---------- */
.faq-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.65fr;
  gap: 50px;
  align-items: start;
}

.faq-side {
  padding-top: 10px;
}

.faq-side-note {
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
  padding: 22px;
  margin-top: 22px;
}

.faq-side-note h3 {
  font-size: 15px;
  color: var(--text-main);
}

.faq-side-note p {
  color: var(--text-soft);
  font-size: 13px;
  margin-top: 9px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .2s ease, background .2s ease;
}

.faq-item[open] {
  border-color: rgba(77, 168, 255, .55);
  background: rgba(255, 255, 255, 0.055);
}

.faq-item summary {
  padding: 19px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  transition: color .2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .faq-q {
  display: flex;
  gap: 10px;
  align-items: center;
}

.faq-item summary .q-mark {
  color: var(--blue);
  font-weight: 800;
  font-size: 14px;
  font-family: ui-monospace, monospace;
}

.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--text-soft);
  border-radius: 3px;
  transition: all .25s ease;
}

.faq-icon::before {
  width: 13px;
  height: 2px;
  left: 5px;
  top: 11px;
}

.faq-icon::after {
  width: 2px;
  height: 13px;
  left: 11px;
  top: 5px;
}

.faq-item[open] .faq-icon::after {
  transform: scaleY(0);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-item .faq-body {
  padding: 0 22px 20px;
  margin-left: 20px;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.9;
  border-left: 1px solid rgba(77, 168, 255, .3);
  padding-left: 15px;
  margin-left: 21px;
}

.help-more {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  color: var(--text-soft);
  font-size: 14px;
}

/* ---------- Final CTA ---------- */
.final-cta {
  position: relative;
  padding: 78px 0;
  overflow: hidden;
}

.final-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: -1;
  opacity: .8;
}

.cta-box {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  padding: 52px 40px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 26px;
  background: radial-gradient(ellipse at 50% 10%, rgba(77, 168, 255, .15), rgba(20, 25, 40, .92) 65%);
  position: relative;
}

.cta-box h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
}

.cta-box p {
  color: var(--text-soft);
  margin-top: 13px;
  font-size: 15px;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 28px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #070d17;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 54px 0 0;
  color: var(--text-soft);
}

.site-footer .container {
  max-width: var(--container);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 0.9fr 0.9fr 1fr;
  gap: 42px;
  padding-bottom: 42px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.footer-brand-text {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.85;
  margin-top: 16px;
  max-width: 380px;
}

.footer-col h4 {
  font-size: 14px;
  color: #fff;
  letter-spacing: .05em;
  margin-bottom: 15px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: var(--text-soft);
  font-size: 14px;
  transition: color .2s ease, text-decoration .2s ease;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 17px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-dim);
}

.copyright {
  color: var(--text-soft);
}

.footer-contact-row {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text-soft);
}

.contact-ico {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--cyan);
}

/* ---------- Responsive ---------- */
@media (max-width: 1199px) {
  .main-nav {
    gap: 18px;
  }

  .nav-link {
    font-size: 13px;
  }

  .brand-name {
    font-size: 15px;
  }

  .search-form input,
  .search-form:focus-within input {
    width: 100px;
  }

  .header-tools {
    gap: 8px;
  }

  .hero-grid {
    gap: 36px;
  }

  .update-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }

  .step-arrow {
    display: none;
  }

  .ann-item {
    grid-template-columns: 130px 1fr 170px;
  }

  .ann-tag {
    grid-column: 1 / 2;
    grid-row: 2;
  }

  .ann-date .d {
    font-size: 25px;
  }

  .guide-row {
    gap: 15px;
  }
}

@media (max-width: 992px) {
  .site-header {
    height: auto;
  }

  .header-wrap {
    height: var(--header-height);
    flex-wrap: nowrap;
  }

  .main-nav {
    width: 100%;
    max-height: 0;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: var(--header-height);
    left: 0;
    background: rgba(8, 13, 24, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    padding: 0 24px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease, max-height .25s ease, padding .25s ease;
  }

  .header-wrap.nav-open .main-nav {
    max-height: 390px;
    padding: 15px 24px 24px;
    opacity: 1;
    pointer-events: auto;
    gap: 0;
  }

  .nav-link {
    padding: 12px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link.active::after {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    width: 38px;
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    color: var(--text-soft);
  }

  .menu-toggle svg {
    width: 18px;
    height: 18px;
  }

  .header-wrap.nav-open .menu-toggle svg path:nth-child(1) {
    display: none;
  }

  .search-toggle {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    color: var(--text-soft);
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
  }

  .search-form {
    display: none;
  }

  .login-link {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .release-card {
    margin-left: 0;
  }

  .guide-row {
    grid-template-columns: 1fr;
  }

  .guide-card,
  .guide-card--wide {
    grid-column: span 1;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .guide-thumb {
    aspect-ratio: 16 / 7;
  }

  .update-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

  .faq-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .faq-side {
    padding-top: 0;
  }

  .latest-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

  .ann-item {
    grid-template-columns: 1fr;
    gap: 13px;
    padding: 20px;
  }

  .ann-date {
    flex-direction: row;
    gap: 10px;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 0 0 10px;
  }

  .ann-date .d {
    font-size: 22px;
  }

  .ann-date .m {
    margin-top: 0;
  }

  .ann-tag {
    grid-column: 1;
    grid-row: auto;
  }

  .ann-detail {
    justify-self: start;
  }

  .archive-link {
    text-align: left;
  }

  .cta-box {
    padding: 34px 20px;
  }

  .cta-box p {
    font-size: 14px;
  }

  .guide-card--wide .guide-thumb {
    aspect-ratio: 4 / 2.6;
  }

  .update-steps {
    padding: 26px 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    justify-content: center;
    text-align: center;
    line-height: 1.8;
  }

  .reminder {
    padding: 15px 17px;
  }

  .hero-btns {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-btns .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .brand-name {
    font-size: 14px;
  }

  .header-wrap {
    gap: 8px;
  }

  .btn-sm {
    padding: 0 13px;
    font-size: 13px;
  }

  .release-card {
    padding: 20px;
  }

  .release-version {
    font-size: 38px;
  }

  .guide-card {
    padding: 20px;
  }
}

/* roulang page: category1 */
:root {
  --deep: #070d17;
  --bg: #0a111f;
  --bg-2: #101c30;
  --panel: #14243d;
  --panel-soft: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.1);
  --line-2: rgba(255, 255, 255, 0.18);
  --text: #eef3fc;
  --muted: #aab9d6;
  --weak: #7084a4;
  --blue: #4da8ff;
  --purple: #7c6bff;
  --cyan: #35e0d0;
  --gold: #f5c45b;
  --radius: 18px;
  --radius-lg: 24px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
  --shadow-lift: 0 18px 42px rgba(0, 0, 0, 0.4);
  --font: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(rgba(255, 255, 255, 0.3) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 75%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
  border: 0;
}

button,
input {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
}

button {
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 9999;
  background: var(--blue);
  color: #001022;
  padding: 10px 16px;
  border-radius: 0 0 12px 12px;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

::selection {
  background: rgba(53, 224, 208, 0.25);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  min-height: 68px;
  background: rgba(10, 17, 31, 0.76);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 13, 23, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  max-width: 220px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 16px;
  color: #fff;
  background: linear-gradient(135deg, #4da8ff, #7c6bff);
  box-shadow: 0 0 18px rgba(77, 168, 255, 0.3);
}

.brand-text {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-inline: auto;
}

.nav-link {
  position: relative;
  padding: 10px 15px;
  color: var(--muted);
  font-size: 15px;
  border-radius: 10px;
  transition: color 0.18s ease, background 0.18s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: #fff;
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  border-radius: 99px;
  box-shadow: 0 0 12px rgba(53, 224, 208, 0.6);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-search {
  display: flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  padding: 7px 7px 7px 14px;
  width: 190px;
  transition: width 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.header-search:focus-within {
  width: 250px;
  border-color: rgba(53, 224, 208, 0.7);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, 0.12);
}

.header-search svg {
  flex: 0 0 auto;
  color: var(--weak);
}

.header-search input {
  background: transparent;
  border: 0;
  width: 100%;
  font-size: 13px;
  padding: 4px 4px 4px 7px;
  color: var(--text);
}

.header-search input::placeholder {
  color: var(--weak);
}

.header-search input:focus {
  outline: none;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 99px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-login {
  padding: 8px 10px;
  color: var(--muted);
  font-size: 13px;
  transition: color 0.18s;
}

.nav-login:hover {
  color: #fff;
}

.header-download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, #4da8ff, #7c6bff);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 2px 14px rgba(77, 168, 255, 0.35);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.header-download-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 6px 24px rgba(124, 107, 255, 0.4);
}

.header-download-btn:active {
  transform: translateY(0);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: linear-gradient(120deg, #4da8ff, #7c6bff);
  color: #fff;
  box-shadow: 0 4px 22px rgba(77, 168, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 107, 255, 0.44);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(77, 168, 255, 0.7);
  transform: translateY(-2px);
}

.btn-lg {
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
}

/* Section base */
.section {
  padding: 84px 0;
  position: relative;
}

.section-tint {
  background: linear-gradient(180deg, rgba(16, 28, 48, 0.35), rgba(16, 28, 48, 0.72), rgba(16, 28, 48, 0.35));
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 13px;
}

.section-eyebrow::before {
  content: "//";
  color: var(--weak);
}

.section h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.section-desc {
  max-width: 720px;
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 34px;
}

/* Hero */
.page-hero {
  position: relative;
  padding: 92px 0 78px;
  background:
    linear-gradient(180deg, rgba(7, 13, 23, 0.9), rgba(10, 17, 31, 0.98)),
    url("/assets/images/backpic/back-1.png") center 30% / cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -100px;
  top: -120px;
  background: radial-gradient(circle, rgba(124, 107, 255, 0.18), transparent 65%);
}

.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--weak);
  margin-bottom: 34px;
}

.crumbs a {
  color: var(--muted);
  transition: color 0.18s;
}

.crumbs a:hover {
  color: var(--blue);
}

.crumbs span {
  color: var(--text);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gold);
  border: 1px dashed rgba(245, 196, 91, 0.5);
  border-radius: 999px;
  padding: 6px 13px;
  margin-bottom: 22px;
  letter-spacing: 0.04em;
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 54px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.hero-lead {
  max-width: 780px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  color: var(--weak);
  font-size: 13px;
}

.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--weak);
}

.hero-dot.cyan {
  background: var(--cyan);
}

.hero-dot.gold {
  background: var(--gold);
}

.hero-dot.blue {
  background: var(--blue);
}

/* Intro split */
.intro-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 60px;
  align-items: center;
}

.intro-figure {
  position: relative;
}

.intro-figure::before {
  content: "";
  position: absolute;
  inset: -12px;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: calc(var(--radius-lg) + 8px);
  z-index: -1;
  transform: rotate(-1.5deg);
  pointer-events: none;
}

.intro-figure img {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  object-fit: cover;
  width: 100%;
  aspect-ratio: 4 / 3;
}

.intro-float-card {
  position: absolute;
  right: -24px;
  bottom: 22px;
  background: rgba(16, 28, 48, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  padding: 12px 18px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 2px;
}

.float-card-title {
  font-size: 15px;
  font-weight: 700;
}

.float-card-sub {
  font-size: 12px;
  color: var(--weak);
}

.intro-copy .lead {
  color: var(--muted);
  margin-bottom: 22px;
}

.check-list {
  display: grid;
  gap: 13px;
  margin: 24px 0 32px;
}

.check-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: flex-start;
  color: var(--text);
  font-size: 15px;
}

.check-list li strong {
  font-weight: 700;
}

.check-mark {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(53, 224, 208, 0.14);
  color: var(--cyan);
  font-size: 13px;
  border: 1px solid rgba(53, 224, 208, 0.25);
  margin-top: 3px;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Dynamic cards */
.dynamic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.media-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-lg);
  padding: 12px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.media-card:hover {
  transform: translateY(-6px);
  border-color: rgba(77, 168, 255, 0.4);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.36);
}

.card-thumb {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius-lg) - 8px);
}

.card-thumb img {
  width: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.media-card:hover .card-thumb img {
  transform: scale(1.03);
}

.card-tag {
  position: absolute;
  left: 12px;
  top: 12px;
  background: rgba(7, 13, 23, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--gold);
  font-size: 12px;
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid rgba(245, 196, 91, 0.28);
}

.card-body {
  padding: 16px 8px 10px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 8px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--weak);
  font-size: 12px;
}

.card-meta .date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-body h3 {
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--text);
  transition: color 0.18s;
}

.media-card:hover .card-body h3 {
  color: #fff;
}

.card-body p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 10px;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
}

.card-link svg {
  transition: transform 0.18s;
}

.card-link:hover {
  color: var(--cyan);
}

.card-link:hover svg {
  transform: translateX(4px);
}

/* Channel tiles */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.channel-tile {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.channel-tile::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 16px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 168, 255, 0.2), transparent 70%);
  opacity: 0;
  transition: opacity 0.2s;
}

.channel-tile:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(77, 168, 255, 0.42);
  transform: translateY(-5px);
}

.channel-tile:hover::after {
  opacity: 1;
}

.tile-no {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--weak);
  letter-spacing: 0.12em;
  margin-bottom: 18px;
}

.channel-tile h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.channel-tile p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 20px;
}

.tile-link {
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  gap: 5px;
  align-items: center;
}

.tile-link:hover {
  color: var(--cyan);
}

/* Timeline block */
.timeline-section {
  background: linear-gradient(180deg, rgba(7, 13, 23, 0.4), rgba(7, 13, 23, 0.2));
  border-block: 1px solid rgba(255, 255, 255, 0.06);
}

.timeline-list {
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  margin-left: 8px;
  padding-left: 34px;
  display: grid;
  gap: 30px;
  max-width: 880px;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--blue);
  box-shadow: 0 0 0 4px rgba(77, 168, 255, 0.16);
}

.timeline-time {
  display: inline-block;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  margin-bottom: 7px;
}

.timeline-item h3 {
  font-size: 18px;
  font-weight: 700;
}

.timeline-item p {
  color: var(--muted);
  font-size: 14px;
  max-width: 720px;
}

/* Service notes */
.service-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  align-items: stretch;
}

.note-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 30px 26px;
  position: relative;
  overflow: hidden;
}

.note-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--blue), var(--purple));
  opacity: 0.7;
}

.note-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.note-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.note-list {
  display: grid;
  gap: 11px;
}

.note-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
}

.note-list svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
  margin-top: 4px;
}

/* Download CTA */
.download-wrap {
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(77, 168, 255, 0.08), rgba(124, 107, 255, 0.08)),
    var(--bg-2);
  border: 1px solid var(--line);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download-wrap::before,
.download-wrap::after {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 224, 208, 0.12), transparent 68%);
  pointer-events: none;
}

.download-wrap::before {
  left: -80px;
  top: -100px;
}

.download-wrap::after {
  right: -80px;
  bottom: -100px;
}

.download-wrap h2 {
  margin-bottom: 10px;
}

.download-wrap > p {
  max-width: 680px;
  margin-inline: auto;
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 28px;
}

.download-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 22px;
}

.download-note {
  font-size: 13px;
  color: var(--weak);
}

/* FAQ */
.faq-wrap {
  max-width: 860px;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.18s, background 0.18s;
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.faq-item.is-open {
  border-color: rgba(53, 224, 208, 0.35);
  background: rgba(53, 224, 208, 0.04);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.faq-ico {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  border: 1px solid var(--line-2);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 400;
  color: var(--muted);
  transition: transform 0.25s ease, color 0.18s, border-color 0.18s;
}

.faq-item.is-open .faq-ico {
  transform: rotate(45deg);
  color: var(--cyan);
  border-color: rgba(53, 224, 208, 0.6);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease-out;
}

.faq-a-inner {
  padding: 0 20px 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  padding-top: 15px;
  margin: 0 20px 0;
  padding: 14px 0 18px;
}

.faq-help {
  margin-top: 24px;
  color: var(--weak);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.faq-help a {
  color: var(--blue);
  font-weight: 600;
}

.faq-help a:hover {
  color: var(--cyan);
}

/* Footer */
.site-footer {
  background: #070d17;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 64px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 42px;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 14px;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #4da8ff, #7c6bff);
  display: inline-grid;
  place-items: center;
  font-size: 15px;
  color: #fff;
}

.footer-brand-text {
  color: var(--weak);
  font-size: 14px;
  max-width: 360px;
  margin-bottom: 22px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.18s;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-contact-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.footer-contact-row .contact-ico {
  color: var(--blue);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: space-between;
  color: var(--weak);
  font-size: 12px;
  padding: 18px 0 8px;
}

.footer-bottom .copyright {
  color: var(--muted);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1100px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    left: 24px;
    right: 24px;
    top: calc(100% + 8px);
    background: rgba(10, 17, 31, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  }

  .main-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    padding: 13px 16px;
  }

  .nav-link.active::after {
    left: 16px;
    right: 16px;
    bottom: 8px;
    width: auto;
  }

  .header-actions {
    margin-left: auto;
  }

  .intro-grid,
  .service-split {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .intro-figure {
    max-width: 620px;
  }

  .intro-float-card {
    right: 14px;
  }
}

@media (max-width: 900px) {
  .dynamic-grid,
  .tile-grid {
    grid-template-columns: 1fr;
  }

  .dynamic-grid {
    gap: 16px;
  }

  .media-card {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 0;
    padding: 10px;
  }

  .media-card .card-thumb {
    height: 160px;
  }

  .card-body {
    padding: 8px 14px;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

  .container {
    width: min(100% - 36px, 1200px);
  }

  .header-search {
    display: none;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .page-hero {
    padding: 68px 0 54px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .header-download-btn {
    padding: 0 15px;
    height: 38px;
    font-size: 13px;
  }
}

@media (max-width: 540px) {
  .brand-text {
    font-size: 16px;
  }

  .brand {
    max-width: 162px;
  }

  .brand-mark {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  .nav-login {
    display: none;
  }

  .media-card {
    display: block;
  }

  .media-card .card-thumb {
    height: auto;
  }

  .download-wrap {
    padding: 34px 20px;
  }

  .download-actions .btn {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category3 */
:root{
  --bg-page:#0a111f;
  --bg-deep:#070d17;
  --bg-panel:#101c30;
  --bg-card:#14243d;
  --txt-main:#eef3fc;
  --txt-sub:#aab9d6;
  --txt-weak:#7084a4;
  --blue:#4da8ff;
  --purple:#7c6bff;
  --cyan:#35e0d0;
  --gold:#f5c45b;
  --line:rgba(255,255,255,.09);
  --line-bright:rgba(77,168,255,.35);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 18px 40px rgba(0,0,0,.25);
  --shadow-glow:0 0 24px rgba(53,224,208,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-page);
  color:var(--txt-main);
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  line-height:1.75;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:16px;border:1px solid rgba(255,255,255,.1)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input{font-family:inherit;outline:none}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:860px;margin:0 auto;padding:0 24px}

/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,17,31,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  height:68px;
}
.header-inner{
  max-width:1200px;height:68px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;gap:22px;
}
.site-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(135deg,var(--blue),var(--purple));
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#fff;
  box-shadow:0 0 12px rgba(77,168,255,.35);
}
.brand-text{font-weight:800;font-size:16px;letter-spacing:.01em;color:var(--txt-main);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:6px;flex:1}
.nav-link{
  color:var(--txt-sub);font-size:14.5px;font-weight:500;
  padding:8px 2px;border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:#fff}
.nav-link.active{
  color:#fff;border-bottom-color:var(--cyan);
  box-shadow:0 6px 12px -8px rgba(53,224,208,.45);
}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:999px;padding:0 14px;height:37px;width:180px;transition:width .25s ease,border-color .25s ease}
.search-box:focus-within{width:220px;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(53,224,208,.13)}
.search-box svg{flex-shrink:0;color:var(--txt-weak)}
.search-box input{background:transparent;border:none;color:var(--txt-main);font-size:13px;width:100%}
.search-box input::placeholder{color:var(--txt-weak)}
.btn-login{color:var(--txt-sub);font-size:14px;padding:6px 4px;transition:color .2s ease}
.btn-login:hover{color:#fff}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(135deg,var(--blue),var(--purple));
  color:#fff;font-weight:600;font-size:14px;
  height:38px;padding:0 20px;border-radius:999px;
  box-shadow:0 4px 18px rgba(77,168,255,.3);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.1);box-shadow:0 8px 28px rgba(124,107,255,.35)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(77,168,255,.3)}

/* mobile toggle */
.menu-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;color:var(--txt-main)}
.mobile-actions{display:none}

/* hero of category */
.hero-category{
  background:
    radial-gradient(circle at 78% 25%, rgba(124,107,255,.17), transparent 31%),
    radial-gradient(circle at 15% 80%, rgba(77,168,255,.13), transparent 32%),
    var(--bg-page);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-bg{
  background-image:linear-gradient(rgba(10,17,31,.7),rgba(10,17,31,.84)),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;background-repeat:no-repeat;
}
.hero-cat-inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;
  padding-top:72px;padding-bottom:78px;
}
.breadcrumb-way{display:flex;align-items:center;gap:7px;color:var(--txt-weak);font-size:13px;margin-bottom:20px}
.breadcrumb-way a{color:var(--txt-sub);transition:color .2s}
.breadcrumb-way a:hover{color:#fff}
.breadcrumb-way .sep{opacity:.6}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(245,196,91,.13);border:1px solid rgba(245,196,91,.32);
  color:var(--gold);font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:999px;margin-bottom:18px;
}
.badge .pin{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 8px var(--gold)}
.hero-category h1{
  font-size:clamp(32px,4.8vw,50px);font-weight:800;line-height:1.18;
  letter-spacing:.5px;margin-bottom:18px;
}
.hero-category h1 em{
  font-style:normal;color:var(--blue);
  background:linear-gradient(120deg,rgba(77,168,255,.2),rgba(124,107,255,.2));
  padding:0 7px;border-radius:6px;border:1px solid rgba(77,168,255,.28);
}
.hero-desc{color:var(--txt-sub);font-size:15.5px;line-height:1.85;max-width:560px;margin-bottom:14px}
.hero-desc strong{color:#e8eef8;font-weight:600}
.hero-note{color:var(--txt-weak);font-size:13px;margin-top:22px;display:flex;align-items:center;gap:9px}
.hero-note::before{content:"";width:22px;height:1px;background:var(--cyan)}
.hero-cta-row{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.btn-hero{
  height:50px;padding:0 32px;border-radius:999px;font-size:15px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;
}
.btn-hero-main{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;box-shadow:0 8px 26px rgba(77,168,255,.28)}
.btn-hero-main:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(124,107,255,.4)}
.btn-hero-ghost{border:1px solid var(--line);color:var(--txt-main);background:rgba(255,255,255,.03)}
.btn-hero-ghost:hover{border-color:var(--blue);background:rgba(255,255,255,.07)}
.hero-media{position:relative}
.hero-shot{background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:20px;padding:10px;backdrop-filter:blur(8px);box-shadow:var(--shadow-card)}
.hero-shot img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:14px}
.glass-chip{
  position:absolute;left:-14px;bottom:22px;z-index:3;
  background:rgba(16,28,48,.74);border:1px solid rgba(77,168,255,.32);
  border-radius:14px;backdrop-filter:blur(12px);
  padding:10px 15px;font-size:12.5px;display:flex;align-items:center;gap:9px;
  box-shadow:0 6px 16px rgba(0,0,0,.25);
}
.glass-chip i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.version-note{margin-top:12px;font-size:12.5px;color:var(--txt-weak);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.version-note .tag{border:1px solid var(--line);border-radius:999px;padding:2px 10px;background:rgba(255,255,255,.03)}
.chip-text b{display:block;color:var(--txt-main)}

/* section */
.sec{
  padding:clamp(60px,7vw,100px) 0;
}
.sec-topic{
  border-top:1px solid rgba(255,255,255,.06);
  background:var(--bg-page);
}
.sec-label{
  display:inline-block;font-size:13px;font-weight:600;color:var(--blue);
  letter-spacing:1.5px;text-transform:uppercase;margin-bottom:14px;
}
.sec-title{font-size:clamp(25px,3.8vw,34px);font-weight:800;line-height:1.32}
.sec-sub{color:var(--txt-sub);font-size:15px;max-width:560px;line-height:1.85}

/* guide grid */
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:40px}
.guide-card{
  background:linear-gradient(180deg,rgba(20,36,61,.64),rgba(16,28,48,.76));
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px;display:flex;flex-direction:column;gap:14px;
  position:relative;overflow:hidden;transition:transform .2s ease,border-color .2s ease,box-shadow .2s;
}
.guide-card::after{
  content:"";position:absolute;top:1px;right:1px;bottom:1px;width:44%;
  background:radial-gradient(circle at 80% 10%,rgba(77,168,255,.06),transparent 70%);
  pointer-events:none;
}
.guide-card:nth-child(odd){transform:translateY(8px)}
.guide-card:hover{transform:translateY(-4px);border-color:rgba(77,168,255,.42);box-shadow:var(--shadow-card)}
.guide-top{display:flex;align-items:center;gap:14px}
.guide-ico{
  width:46px;height:46px;flex-shrink:0;border-radius:13px;
  background:rgba(77,168,255,.11);border:1px solid rgba(77,168,255,.26);
  display:flex;align-items:center;justify-content:center;color:var(--blue);
}
.guide-ico.purple{background:rgba(124,107,255,.12);border-color:rgba(124,107,255,.28);color:#ad9dff}
.guide-ico.cyan{background:rgba(53,224,208,.09);border-color:rgba(53,224,208,.27);color:var(--cyan)}
.guide-card h3{font-size:17px;font-weight:700}
.guide-card p{font-size:13.5px;line-height:1.78;color:var(--txt-sub)}
.guide-tag-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:3px}
.guide-tag-row span{font-size:12px;color:var(--txt-weak);border:1px solid rgba(255,255,255,.08);padding:2px 10px;border-radius:999px;background:rgba(255,255,255,.02)}

/* visual feature slice */
.visual-slice{background:var(--bg-panel);border-block:1px solid var(--line);}
.slice-inner{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.slice-copy h2{font-size:clamp(22px,3vw,30px);font-weight:800;margin-bottom:12px}
.slice-copy p{color:var(--txt-sub);line-height:1.8;font-size:14.5px;margin-bottom:14px}
.feature-ico-list{display:flex;flex-direction:column;gap:11px;margin-top:18px}
.feat-line{display:flex;gap:12px;align-items:center}
.feat-line .dot{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;background:rgba(53,224,208,.12);
  border:1px solid rgba(53,224,208,.26);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;
}
.feat-line span{font-size:14px;color:#d6e0f2}
.slice-visual{position:relative}
.slice-visual .main-img{border-radius:var(--radius-lg);aspect-ratio:4/3;object-fit:cover;width:100%}

/* workflow */
.workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:44px}
.work-item{
  border-radius:var(--radius-lg);background:rgba(16,28,48,.78);
  padding:22px 18px;border-top:1px solid var(--line-bright);
  box-shadow:0 10px 30px rgba(0,0,0,.14);transition:transform .2s ease,box-shadow .2s ease;
  position:relative;
}
.work-item:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(0,0,0,.25)}
.w-step{display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;padding:0 6px;border-radius:8px;background:linear-gradient(135deg,var(--blue),var(--purple));font-size:13px;font-weight:700;margin-bottom:16px}
.work-item h4{font-size:15px;margin-bottom:6px;font-weight:600}
.work-item p{font-size:13px;color:var(--txt-sub);line-height:1.68}

/* index row list */
.sec-index{
  background:linear-gradient(180deg,rgba(10,17,31,1) 0,rgba(17,28,47,.55) 50%,var(--bg-page) 100%);
}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px}
.log-row-card{
  margin-top:34px;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:rgba(255,255,255,.026);overflow:hidden;
}
.log-row{
  display:grid;grid-template-columns:240px 1fr 180px 100px;
  gap:22px;align-items:center;padding:16px 22px;
  transition:background .2s ease;
  border-bottom:1px dashed rgba(255,255,255,.08);
}
.log-row:last-child{border-bottom:none}
.log-row:hover{background:rgba(255,255,255,.04)}
.log-icon{
  background:rgba(77,168,255,.1);border:1px solid rgba(77,168,255,.22);
  border-radius:10px;
  display:flex;align-items:center;width:138px;overflow:hidden;
}
.log-icon img{width:100%;height:64px;object-fit:cover;border-radius:8px}
.log-title{font-weight:600;font-size:15px;color:#e7eef9;line-height:1.5}
.log-title small{display:block;font-size:12px;color:var(--txt-weak);font-weight:400;margin-top:5px}
.log-type{font-size:12.5px;display:inline-flex;align-items:center;justify-content:center;width:max-content;border:1px solid rgba(53,224,208,.25);color:var(--cyan);border-radius:999px;padding:2px 12px;background:rgba(53,224,208,.06)}
.log-more{color:var(--blue);font-size:13.5px;text-align:right;white-space:nowrap}
.log-more i{display:inline-block;transition:transform .2s ease}
.log-row:hover .log-more i{transform:translateX(4px)}
.arch-row-cta{display:flex;gap:8px;font-size:13px;color:var(--txt-weak);justify-content:flex-end;margin-top:18px}
.arch-row-cta a{color:var(--blue);font-size:13px}

/* faq */
.faq-wrap{max-width:900px;margin:44px auto 0}
.faq-list{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:rgba(255,255,255,.02)}
.faq-item{border-bottom:1px solid rgba(255,255,255,.07);background:transparent;transition:background .2s}
.faq-item:last-child{border-bottom:none}
.faq-item[aria-expanded="true"]{background:rgba(255,255,255,.03)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  color:var(--txt-main);font-size:15px;font-weight:600;text-align:left;
  padding:19px 22px;
}
.faq-q:hover{color:#fff}
.faq-icon{
  width:26px;height:26px;position:relative;flex-shrink:0;
}
.faq-icon::before,.faq-icon::after{content:"";background:var(--cyan);position:absolute;border-radius:2px;transition:opacity .2s ease,transform .26s ease}
.faq-icon::before{width:12px;height:2px;top:12px;left:7px}
.faq-icon::after{height:12px;width:2px;top:7px;left:12px}
.faq-item[aria-expanded="true"] .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{display:none;padding:0 22px;padding-bottom:20px;color:var(--txt-sub);font-size:14px;line-height:1.8}
.faq-item[aria-expanded="true"] .faq-a{display:block}
.faq-more{margin-top:26px;text-align:center;color:var(--txt-sub);font-size:14px}
.faq-more a{color:var(--blue);font-weight:600}
.faq-more a:hover{text-decoration:underline}

/* cta band */
.cta-highlight{
  background:radial-gradient(circle at 20% 130%,rgba(77,168,255,.15),transparent 44%),var(--bg-panel);
  border-block:1px solid var(--line);
}
.cta-box{
  border:1px solid rgba(77,168,255,.2);border-radius:var(--radius-lg);
  overflow:hidden;
}
.cta-box-inner{
  padding:clamp(34px,6%,64px);display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px;
}
.cta-box h2{font-size:clamp(23px,3.2vw,32px);font-weight:800}
.cta-box p{font-size:14.5px;color:var(--txt-sub);max-width:640px}
.cta-buttons{display:flex;gap:15px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.cta-sm-links{display:flex;gap:22px;font-size:13px;color:var(--txt-weak);justify-content:center;flex-wrap:wrap;margin-top:6px}
.cta-sm-links a{color:var(--txt-sub);border-bottom:1px solid transparent;transition:border-color .2s,color .2s}
.cta-sm-links a:hover{color:#fff;border-color:var(--blue)}

/* footer */
.site-footer{background:var(--bg-deep);border-top:1px solid rgba(77,168,255,.25);margin-top:0}
.site-footer .container{padding-top:52px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand-name{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px}
.footer-brand-text{color:var(--txt-sub);font-size:13.5px;line-height:1.8;max-width:300px;margin-top:15px}
.footer-col h4{font-size:14px;color:#dfe7f4;font-weight:600;margin-bottom:13px}
.footer-links li{margin-bottom:8px}
.footer-links a{color:var(--txt-sub);font-size:13.5px;transition:color .2s}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-contact-row{display:flex;align-items:center;gap:9px;color:var(--txt-sub);font-size:13.5px}
.contact-ico{color:var(--blue);display:flex;align-items:center}
.footer-bottom{
  border-top:1px solid var(--line);margin-top:42px;padding:20px 0;display:flex;
  flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;
  color:var(--txt-weak);font-size:12.5px;
}
.copyright{color:var(--txt-sub)}
@media(max-width:1199px){
  .main-nav{gap:18px}
  .footer-top{grid-template-columns:1.2fr 1fr 1fr}
}
@media(max-width:991px){
  .header-inner{gap:12px}
  .main-nav{display:none}
  .header-actions .btn-login{display:none}
  .menu-toggle{display:flex}
  .mobile-search{display:block}
  .hero-cat-inner{grid-template-columns:1fr;gap:34px;padding:46px 0}
  .slice-inner{grid-template-columns:1fr;gap:26px}
  .guide-grid{grid-template-columns:1fr;margin-top:30px}
  .guide-card:nth-child(odd){transform:none}
  .workflow{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:767px){
  .container{padding:0 16px}
  .header-inner{padding:0 16px}
  .header-actions .search-box{display:none}
  .mobile-actions{display:flex;align-items:center;gap:8px}
  .hero-category h1{font-size:30px}
  .hero-desc{font-size:14.5px}
  .hero-cta-row .btn-hero{width:100%}
  .glass-chip{left:-6px;bottom:8px}
  .guide-grid{grid-template-columns:1fr}
  .workflow{grid-template-columns:1fr}
  .log-row{grid-template-columns:1fr;gap:9px;padding:14px 16px}
  .log-icon{margin-bottom:2px}
  .log-icon img{width:100%;height:70px}
  .log-type{width:auto}
  .log-more{text-align:left}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}
  .search-box{display:none}
  .footer-links li{margin-bottom:4px}
  .footer-links a{font-size:13px}
  .footer-brand-text{max-width:none}
}

/* hide footer/mobile helpers */
.footer-bottom .copy-tech{color:#4b5e7c}
.search-only-desktop{display:flex}
.mobile-search-ico{display:none;color:var(--txt-main);width:38px;height:38px;border:1px solid var(--line);border-radius:9px;align-items:center;justify-content:center}

/* roulang page: category4 */
:root{
  --bg:#070d18;
  --bg-alt:#0a111f;
  --surface:#101b2e;
  --panel:#14243d;
  --ink:#eef3fc;
  --muted:#aab9d6;
  --faint:#7084a4;
  --blue:#4da8ff;
  --violet:#7c6bff;
  --cyan:#35e0d0;
  --amber:#f5c45b;
  --line:rgba(255,255,255,.1);
  --line-soft:rgba(255,255,255,.07);
  --radius:20px;
  --radius-sm:10px;
  --shadow:0 20px 48px rgba(0,0,0,.22);
  --shadow-hover:0 24px 58px rgba(0,0,0,.32);
  --max:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 12% 18%, rgba(77,168,255,.1), transparent 30%),
    radial-gradient(circle at 88% 8%, rgba(124,107,255,.09), transparent 24%),
    radial-gradient(circle at 72% 82%, rgba(53,224,208,.06), transparent 24%);
  z-index:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input{font-family:inherit}
h1,h2,h3,h4{
  font-weight:700;
  line-height:1.3;
  color:var(--ink);
}
h2{font-size:clamp(25px,3.5vw,34px);letter-spacing:-.02em}
h3{font-size:20px;letter-spacing:-.01em}
.container{
  position:relative;
  z-index:1;
  max-width:var(--max);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.section{padding:74px 0}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--blue);
  font-weight:600;
  font-size:15px;
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,color .2s ease;
}
.text-link:hover{color:#b9dcff;border-color:currentColor}
.sec-head{max-width:720px;margin-bottom:38px}
.sec-head p{color:var(--muted);margin-top:13px}
section-kicker,.section-kicker{
  display:inline-flex;
  align-items:center;
  column-gap:10px;
  color:var(--cyan);
  font-size:13px;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.section-kicker::before{
  content:"";
  width:18px;height:1px;
  background:var(--cyan);
  box-shadow:0 0 0 1px rgba(255,255,255,.4) inset;
}
.amber-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  background:rgba(245,196,91,.11);
  color:var(--amber);
  border:1px solid rgba(245,196,91,.32);
  padding:6px 13px;
  border-radius:999px;
  font-size:13px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  font-weight:700;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease,color .2s ease;
  white-space:nowrap;
  line-height:1;
}
.btn-main{
  min-height:50px;
  padding:0 28px;
  background:linear-gradient(115deg,var(--blue),var(--violet) 78%);
  color:white;
  box-shadow:0 10px 28px rgba(77,168,255,.24),0 4px 14px rgba(124,107,255,.2);
}
.btn-main:hover{
  filter:brightness(1.12);
  transform:translateY(-2px);
  box-shadow:0 14px 36px rgba(77,168,255,.35),0 6px 18px rgba(124,107,255,.3);
}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  min-height:48px;
  padding:0 27px;
  background:rgba(255,255,255,.02);
  border:1px solid rgba(255,255,255,.3);
  color:var(--ink);
}
.btn-ghost:hover{
  border-color:var(--blue);
  background:rgba(255,255,255,.07);
  color:#d5e9ff;
  transform:translateY(-1px);
}
/* Header */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:66px;
  background:rgba(7,13,24,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-header.scrolled{
  background:rgba(7,13,24,.94);
  border-bottom-color:rgba(255,255,255,.12);
  box-shadow:0 12px 26px rgba(0,0,0,.18);
}
.header-inner{
  max-width:var(--max);
  height:66px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
  display:flex;
  align-items:center;
  gap:18px;
}
.header-left{display:flex;align-items:center;flex-shrink:0}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  font-weight:800;
  letter-spacing:-.02em;
  font-size:17px;
  line-height:1.2;
}
.brand-mark{
  width:30px;height:30px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,var(--blue),var(--violet));
  color:white;
  font-weight:800;
  font-size:16px;
  border-radius:10px;
  box-shadow:0 6px 18px rgba(77,168,255,.4);
  flex-shrink:0;
  border:1px solid rgba(255,255,255,.28);
  transition:transform .2s ease;
}
.brand:hover .brand-mark{transform:rotate(-7deg) scale(1.04)}
.main-nav{
  display:flex;
  align-items:center;
  gap:32px;
  margin:0 auto;
}
.nav-link{
  position:relative;
  color:var(--muted);
  font-size:15px;
  font-weight:600;
  padding:20px 0 18px;
  transition:color .2s ease;
}
.nav-link:hover{color:#dfe9ff}
.nav-link.active{
  color:#ffffff;
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:0;right:0;
  bottom:9px;
  height:2px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  box-shadow:0 0 12px rgba(77,168,255,.45);
}
.header-right{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.header-search{position:relative;margin-right:4px}
.header-search input{
  width:142px;
  height:38px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(255,255,255,.05);
  padding:0 14px 0 36px;
  color:var(--ink);
  font-size:14px;
  transition:border-color .2s ease,width .25s ease,box-shadow .2s ease,background .2s ease;
}
.header-search input::placeholder{color:var(--faint)}
.header-search input:focus{
  width:202px;
  border-color:rgba(53,224,208,.75);
  box-shadow:0 0 0 4px rgba(53,224,208,.1);
  background:rgba(255,255,255,.06);
  outline:none;
}
.header-search svg{
  position:absolute;
  left:13px;top:50%;
  transform:translateY(-50%);
  color:var(--faint);
  pointer-events:none;
  transition:color .2s ease;
}
.header-search input:focus + svg,.header-search svg:hover{color:var(--cyan)}
.login-link{
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  padding:8px 12px;
  border-radius:9px;
  transition:color .2s ease,background .2s ease;
}
.login-link:hover{color:white;background:rgba(255,255,255,.06)}
.cta-link{
  min-height:38px;
  padding:0 17px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  background:linear-gradient(115deg,var(--blue),var(--violet));
  color:white;
  font-weight:700;
  font-size:14px;
  box-shadow:0 8px 22px rgba(77,168,255,.25);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.cta-link:hover{filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 12px 28px rgba(77,168,255,.4)}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(255,255,255,.04);
}
.nav-toggle span{
  width:18px;height:2px;
  background:var(--ink);
  border-radius:9px;
  transition:transform .25s ease,opacity .2s ease;
}
.nav-toggle.active span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-3px) rotate(-45deg)}
/* Page hero */
.page-hero{
  padding:138px 0 62px;
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.page-hero::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(77,168,255,.12),transparent 67%);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1fr .82fr;
  gap:50px;
  align-items:center;
}
.hero-copy{position:relative;z-index:2}
.hero-overline{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-size:13px;
  letter-spacing:.13em;
  color:var(--cyan);
  text-transform:uppercase;
}
.hero-overline::before{
  content:"";
  width:26px;height:1px;
  background:var(--cyan);
  box-shadow:0 0 0 1px rgba(255,255,255,.5) inset;
}
.page-hero h1{
  font-size:clamp(40px,5vw,60px);
  font-weight:800;
  letter-spacing:-.03em;
  margin:16px 0 20px;
  line-height:1.12;
}
.hero-desc{
  color:var(--muted);
  font-size:16px;
  max-width:565px;
  margin-bottom:25px;
}
.hero-desc strong{color:#d9ffff;font-weight:700}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:13px;
  margin:18px 0 25px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:16px 22px;
  color:var(--faint);
  font-size:13px;
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta svg{width:15px;height:15px;color:var(--blue)}
.hero-media{position:relative;z-index:1}
.media-frame{
  border-radius:20px;
  padding:10px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.04);
  box-shadow:0 28px 70px rgba(0,0,0,.24);
  transform:rotate(1deg);
}
.media-frame img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.1);
  background:#101c2e;
}
.hero-notice{
  margin-top:18px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:rgba(245,196,91,.07);
  border:1px solid rgba(245,196,91,.18);
  color:#ecdcc0;
  padding:9px 15px;
  border-radius:12px;
  font-size:13px;
}
/* Service split */
.service-page .site-header{border-bottom-color:rgba(255,255,255,.07)}
.split-service{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:42px;
  align-items:start;
}
.split-intro{
  position:sticky;
  top:100px;
  padding:24px 0 4px;
}
.split-intro h2{margin:13px 0 15px}
.split-intro p{color:var(--muted);margin-bottom:20px;font-size:15px}
.service-entries{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.service-entry{
  position:relative;
  background:linear-gradient(140deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  border:1px solid rgba(255,255,255,.1);
  border-radius:18px;
  padding:21px 21px 23px;
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .25s ease,background .22s ease;
}
.service-entry::before{
  content:"";
  position:absolute;
  left:0;top:18px;bottom:18px;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--blue),var(--cyan));
  opacity:.75;
}
.service-entry:hover{
  transform:translateY(-4px);
  border-color:rgba(77,168,255,.42);
  box-shadow:var(--shadow-hover);
  background:linear-gradient(140deg,rgba(77,168,255,.09),rgba(124,107,255,.035));
}
.service-entry svg{
  width:24px;height:24px;
  color:var(--cyan);
  margin-bottom:13px;
}
.service-entry h3{font-size:17px}
.service-entry p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7}
.entry-index{
  font-family:var(--mono);
  color:rgba(255,255,255,.24);
  font-size:12px;
  position:absolute;
  top:18px;right:18px;
  letter-spacing:.04em;
}
/* Flow */
.flow-section{
  background:var(--bg-alt);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.flow-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px}
.flow-head .section-kicker{color:var(--violet)}
.flow-head .section-kicker::before{background:var(--violet)}
.flow-head p{color:var(--muted);max-width:480px;font-size:15px;margin-top:10px}
.flow-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.flow-item{
  position:relative;
  border:1px solid var(--line-soft);
  background:rgba(255,255,255,.025);
  border-radius:16px;
  padding:22px 18px 20px;
  transition:transform .2s ease,background .2s ease,border-color .2s ease;
}
.flow-item::before{
  content:"";
  position:absolute;
  top:24px;left:0;right:0;
  height:1px;
  background-image:linear-gradient(90deg,transparent,rgba(77,168,255,.4),transparent);
  opacity:0;
  transition:opacity .2s;
}
.flow-item:hover{
  transform:translateY(-3px);
  border-color:rgba(53,224,208,.35);
  background:rgba(255,255,255,.04);
}
.flow-item:hover::before{opacity:1}
.flow-item .step-dot{
  width:38px;height:38px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:13px;
  font-family:var(--mono);
  border-radius:50%;
  background:rgba(77,168,255,.12);
  color:var(--blue);
  border:1px dashed rgba(77,168,255,.55);
  margin-bottom:16px;
}
.flow-item h3{font-size:16px}
.flow-item p{margin-top:9px;color:var(--muted);font-size:13px}
/* Scenario */
.scenario-grid{
  display:grid;
  grid-template-columns:.95fr 1.05fr;
  gap:20px;
  align-items:stretch;
}
.scenario-visual{
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--line);
  min-height:350px;
  position:relative;
  background:#101c2e;
}
.scenario-visual img{
  width:100%;height:100%;
  min-height:350px;
  object-fit:cover;
  object-position:center 24%;
}
.scenario-stack{
  display:grid;
  gap:14px;
}
.scenario-row{
  width:100%;
  border:1px solid var(--line);
  background:rgba(255,255,255,.032);
  border-radius:18px;
  padding:21px 22px;
  text-align:left;
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.scenario-row:hover{
  transform:translateX(4px);
  border-color:rgba(53,224,208,.35);
  background:rgba(53,224,208,.05);
}
.scenario-row .row-event{
  font-family:var(--mono);
  color:var(--cyan);
  font-size:13px;
  white-space:nowrap;
  margin-top:4px;
}
.scenario-row h3{font-size:17px}
.scenario-row p{margin-top:6px;color:var(--muted);font-size:14px}
/* Support quick access */
.support-line{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  background:rgba(16,27,46,.55);
  border:1px solid var(--line);
  border-radius:20px;
  padding:24px;
  align-items:center;
}
.support-line .support-text{flex:1 1 270px}
.support-line h3{font-size:19px}
.support-line p{color:var(--muted);font-size:14px;margin-top:5px}
.support-badge-group{display:flex;flex-wrap:wrap;gap:10px}
.support-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  border:1px dashed rgba(120,132,164,.45);
  border-radius:999px;
  padding:9px 15px;
  color:var(--muted);
  font-size:14px;
  background:rgba(255,255,255,.025);
}
.support-badge svg{width:15px;height:15px;color:var(--blue)}
/* FAQ */
.faq-wrap{
  max-width:900px;
  margin:0 auto;
}
.faq-head{text-align:center;margin-bottom:40px}
.faq-list{border-top:1px solid var(--line-soft)}
.faq-item{
  border-bottom:1px solid var(--line-soft);
  background:transparent;
  transition:background .25s ease,box-shadow .25s ease;
  padding:0 4px;
}
.faq-item.open{
  background:linear-gradient(90deg,rgba(77,168,255,.055),transparent 45%);
}
.faq-q button{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  width:100%;
  text-align:left;
  padding:24px 1px;
  background:transparent;
  color:var(--ink);
  font-size:17px;
  font-weight:600;
}
.faq-q button:hover{color:#cde4ff}
.faq-item .faq-icon{
  position:relative;
  width:30px;height:30px;
  min-width:30px;
  border:1px solid rgba(255,255,255,.25);
  border-radius:50%;
  transition:transform .3s ease,background .25s ease,border-color .25s ease;
}
.faq-item .faq-icon::before,.faq-item .faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:var(--muted);
  border-radius:2px;
  transition:background .25s;
}
.faq-item .faq-icon::before{width:10px;height:1.5px;transform:translate(-50%,-50%)}
.faq-item .faq-icon::after{width:1.5px;height:10px;transform:translate(-50%,-50%)}
.faq-item.open .faq-icon{
  transform:rotate(45deg);
  background:rgba(53,224,208,.16);
  border-color:var(--cyan);
}
.faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:var(--cyan)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a-inner{
  padding:0 36px 25px 0;
  color:var(--muted);
  font-size:15px;
  max-width:770px;
}
/* CTA */
.cta-panel{
  position:relative;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.13);
  background:linear-gradient(135deg,rgba(77,168,255,.09),rgba(124,107,255,.075)),#0e192d;
  padding:52px 46px;
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  opacity:.08;
  pointer-events:none;
}
.cta-panel::after{
  content:"";
  position:absolute;
  left:7%;bottom:-80px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(53,224,208,.16),transparent 68%);
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap}
.cta-copy{max-width:680px}
.cta-copy h2{font-size:clamp(24px,3.2vw,32px);margin-bottom:10px}
.cta-copy p{color:var(--muted);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
/* Breadcrumb */
.breadcrumb{
  max-width:var(--max);
  margin:0 auto;
  padding:86px 20px 10px;
  z-index:1;
  position:relative;
}
.breadcrumb ul{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--faint);
}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:white}
.breadcrumb li::after{content:"/";margin-left:8px;color:rgba(255,255,255,.24)}
.breadcrumb li:last-child::after{content:none}
.breadcrumb li[aria-current="page"]{color:var(--muted)}
/* Footer */
.site-footer{
  border-top:1px solid rgba(255,255,255,.1);
  background:#060d17;
  padding-top:62px;
  margin-top:18px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr .8fr .8fr 1fr;
  gap:34px;
}
.footer-brand-name{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.02em;
}
.brand-mark.footer-mark{
  width:30px;height:30px;
  line-height:1;
}
.footer-brand-text{
  margin-top:16px;
  color:var(--muted);
  font-size:14px;
  max-width:270px;
  line-height:1.8;
}
.footer-col h4{
  font-size:14px;
  color:#dfe7f5;
  margin-bottom:17px;
  letter-spacing:.02em;
}
.footer-links{
  display:grid;
  gap:8px;
}
.footer-links a{
  color:var(--faint);
  font-size:13px;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-links a:hover{color:white;padding-left:3px}
.footer-contact-row{
  display:flex;
  align-items:center;
  gap:9px;
  color:var(--faint);
  font-size:13px;
}
.footer-contact-row .contact-ico{color:var(--blue);display:inline-flex}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:46px;
  padding:18px 0 20px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 18px;
  color:rgba(112,132,164,.88);
  font-size:12px;
}
.copyright{color:var(--muted)}
@media (max-width:1180px){
  .footer-top{grid-template-columns:1fr .8fr .8fr 1fr;gap:24px}
}
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr .92fr;gap:30px}
  .main-nav{gap:18px}
  .header-search input{width:118px}
  .header-search input:focus{width:160px}
  .footer-top{grid-template-columns:1fr 1fr 1fr 1fr;gap:18px}
  .footer-top{grid-template-columns:1.1fr .8fr .8fr 1fr}
}
@media (max-width:992px){
  .site-header{height:60px}
  .header-inner{height:60px;padding-left:15px;padding-right:15px}
  .header-left{flex:0}
  .main-nav{
    display:flex;
    position:fixed;
    top:60px;left:14px;right:14px;
    z-index:95;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    background:rgba(8,15,27,.98);
    border:1px solid rgba(255,255,255,.16);
    border-radius:16px;
    padding:12px;
    opacity:0;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
    box-shadow:0 18px 46px rgba(0,0,0,.4);
    margin:0;
  }
  .main-nav.open{
    opacity:1;
    transform:translateY(0);
    pointer-events:auto;
  }
  .main-nav .nav-link{
    display:block;
    padding:13px 14px;
    border-radius:10px;
    font-size:15px;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .main-nav .nav-link.active{background:rgba(77,168,255,.1)}
  .main-nav .nav-link.active::after{display:none}
  .nav-toggle{display:inline-flex}
  .header-search{display:none}
  .header-right{gap:6px;margin-left:auto}
  .login-link{display:none}
  .cta-link{min-height:38px}
  .breadcrumb{padding-top:78px}
  .page-hero{padding-top:116px}
  .split-service,.scenario-grid,.hero-grid{grid-template-columns:1fr}
  .split-intro{position:static;padding-top:0}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .cta-panel{padding:40px 26px}
}
@media (max-width:768px){
  .section{padding:58px 0}
  .hero-grid{gap:36px}
  .page-hero h1{font-size:40px}
  .service-entries{grid-template-columns:1fr 1fr}
  .service-entry{margin:0}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .flow-grid{grid-template-columns:1fr}
  .support-line{padding:20px}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .service-entries{grid-template-columns:1fr}
  .page-hero h1{font-size:34px}
  .hero-actions .btn{width:100%}
  .faq-q button{font-size:15px;padding:20px 1px}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .footer-brand p{margin-top:12px}
  .footer-bottom{justify-content:flex-start}
  .media-frame{transform:none}
  .scenario-row{gap:8px;padding:17px 15px}
  .row-event{display:block;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*:before,*:after{
    animation-duration:.01ms!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}