/* roulang page: index */
:root{
  --bg:#050a16;
  --bg-soft:#08101f;
  --bg-deep:#03060f;
  --panel:rgba(19,32,58,.62);
  --panel-strong:rgba(23,39,70,.9);
  --line:rgba(104,148,224,.16);
  --line-strong:rgba(120,170,255,.42);
  --text:#e9f0ff;
  --text-mid:#a9bcdd;
  --text-dim:#7b8fb5;
  --blue:#3f7dff;
  --cyan:#39d8ff;
  --violet:#8161ff;
  --radius:14px;
  --radius-sm:10px;
  --radius-lg:20px;
  --shadow:0 18px 44px -24px rgba(0,0,0,.95);
  --glow:0 0 0 1px rgba(90,150,255,.42), 0 16px 38px -14px rgba(63,125,255,.8);
  --container:1180px;
  --ease:.22s cubic-bezier(.4,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(1100px 520px at 12% -8%, rgba(63,125,255,.20), transparent 62%),
    radial-gradient(900px 460px at 88% 6%, rgba(129,97,255,.16), transparent 66%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
p{margin:0 0 1em;}
h1,h2,h3,h4,h5,h6{margin:0 0 .5em;font-weight:700;line-height:1.35;color:var(--text);letter-spacing:.2px;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:1rem;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  height:68px;
  background:rgba(5,10,22,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease), background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(0,0,0,.95);background:rgba(4,8,18,.94);}
.header-inner{
  height:68px;display:flex;align-items:center;gap:26px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;color:#fff;
  background:linear-gradient(140deg,var(--blue),var(--violet));
  box-shadow:0 0 0 1px rgba(140,180,255,.45),0 10px 24px -12px rgba(63,125,255,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.4px;color:#fff;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-dim);letter-spacing:1.4px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
  display:flex;align-items:center;gap:6px;
  padding:9px 14px;border-radius:9px;
  font-size:14.5px;color:var(--text-mid);font-weight:500;
  transition:color var(--ease),background var(--ease);
}
.main-nav > ul > li > a:hover{color:#fff;background:rgba(96,150,255,.12);}
.main-nav > ul > li > a.active{color:#fff;background:rgba(63,125,255,.18);box-shadow:inset 0 0 0 1px rgba(120,170,255,.35);}
.caret{
  width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.6;transition:transform var(--ease);
}
.has-panel:hover .caret{transform:rotate(180deg);}
.nav-panel{
  position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,-8px);
  min-width:192px;padding:10px;border-radius:14px;
  background:var(--panel-strong);
  border:1px solid var(--line-strong);
  box-shadow:0 26px 52px -26px rgba(0,0,0,.95);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  opacity:0;visibility:hidden;transition:all var(--ease);
}
.has-panel:hover .nav-panel{opacity:1;visibility:visible;transform:translate(-50%,0);}
.nav-panel a{
  display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-mid);
}
.nav-panel a:hover{background:rgba(96,150,255,.16);color:#fff;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  background:rgba(96,150,255,.12);border:1px solid var(--line);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dce8ff;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#dce8ff;border-radius:2px;transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:9px;border:1px solid transparent;
  font-size:14.5px;font-weight:600;letter-spacing:.3px;line-height:1.4;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#3f7dff,#6f5bff 55%,#39d8ff 130%);
  box-shadow:var(--glow);
}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(140,190,255,.6),0 20px 42px -14px rgba(63,125,255,1);color:#fff;}
.btn-ghost{
  color:#d6e4ff;background:rgba(96,150,255,.08);border-color:rgba(120,170,255,.34);
}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(96,150,255,.18);border-color:rgba(150,200,255,.62);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

/* ============ Section base ============ */
.section{padding:82px 0;position:relative;}
.section--soft{
  background:linear-gradient(180deg,rgba(9,17,34,.92),rgba(6,12,26,.96));
  border-top:1px solid rgba(104,148,224,.1);
  border-bottom:1px solid rgba(104,148,224,.1);
}
.section--deep{background:var(--bg-deep);border-top:1px solid rgba(104,148,224,.1);}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:2px;font-weight:600;
  color:var(--cyan);text-transform:uppercase;margin-bottom:12px;
}
.section-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head.center .section-kicker::after{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,var(--cyan));}
.section-head h2{font-size:clamp(23px,2.6vw,31px);margin-bottom:12px;}
.section-head p{color:var(--text-mid);font-size:15px;margin:0;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:92px 0 74px;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(880px 400px at 50% -6%, rgba(63,125,255,.34), transparent 70%),
    linear-gradient(180deg, rgba(4,8,18,.88), rgba(4,8,18,.96) 56%, var(--bg) 100%);
}
.hero::after{
  content:"";position:absolute;left:-10%;right:-10%;bottom:-120px;height:220px;
  background:linear-gradient(90deg,transparent,rgba(57,216,255,.14),transparent);
  transform:rotate(-3deg);filter:blur(6px);pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 16px;border-radius:999px;margin-bottom:22px;
  font-size:12.8px;letter-spacing:.8px;color:#c6dbff;
  background:rgba(63,125,255,.14);
  border:1px solid rgba(120,170,255,.34);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);}
.hero h1{
  font-size:clamp(28px,4.1vw,43px);
  line-height:1.28;letter-spacing:.5px;margin:0 auto 18px;max-width:920px;
  background:linear-gradient(120deg,#ffffff 22%,#bcd6ff 58%,#7fe6ff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  max-width:820px;margin:0 auto 30px;color:#b6c9e8;font-size:15.5px;line-height:1.85;text-align:left;
}
.hero-search{
  display:flex;align-items:center;gap:10px;
  max-width:660px;margin:0 auto 22px;padding:8px 8px 8px 18px;
  border-radius:14px;
  background:rgba(16,28,52,.72);
  border:1px solid rgba(120,170,255,.3);
  box-shadow:0 22px 50px -30px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.hero-search:focus-within{border-color:rgba(120,180,255,.72);box-shadow:0 0 0 4px rgba(63,125,255,.14),0 22px 50px -28px rgba(0,0,0,.95);}
.hero-search svg{flex:0 0 auto;width:19px;height:19px;stroke:#7f9cc9;fill:none;stroke-width:1.9;stroke-linecap:round;}
.hero-search input{
  flex:1 1 auto;min-width:0;background:transparent;border:0;outline:none;
  color:#eaf2ff;font-size:14.5px;padding:10px 0;
}
.hero-search input::placeholder{color:#7288ad;}
.hero-quick{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px;
  margin:0 auto;max-width:800px;
}
.quick-label{font-size:13px;color:var(--text-dim);letter-spacing:1px;}
.chip{
  display:inline-block;padding:6px 15px;border-radius:999px;
  font-size:13px;color:#c3d7f7;
  background:rgba(96,150,255,.1);
  border:1px solid rgba(110,160,240,.26);
  transition:all var(--ease);
}
.chip:hover{color:#fff;background:rgba(96,150,255,.24);border-color:rgba(140,195,255,.6);transform:translateY(-2px);}

/* ============ Stats ============ */
.stats-band{padding:0 0 76px;}
.stat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-top:-34px;position:relative;z-index:3;
}
.stat-card{
  padding:24px 22px;border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.stat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 52px -28px rgba(63,125,255,.9);}
.stat-num{
  font-size:32px;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(120deg,#8fc0ff,#5de6ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1.2;margin-bottom:6px;
}
.stat-label{font-size:14px;color:#d3e2fb;font-weight:600;margin-bottom:4px;}
.stat-desc{font-size:12.5px;color:var(--text-dim);margin:0;}

/* ============ Cards ============ */
.card{
  height:100%;display:flex;flex-direction:column;
  padding:26px 24px;border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 26px 56px -28px rgba(63,125,255,.95);
  background:rgba(24,40,72,.7);
}
.card-icon{
  width:44px;height:44px;border-radius:12px;margin-bottom:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(63,125,255,.28),rgba(129,97,255,.22));
  border:1px solid rgba(130,178,255,.32);
}
.card-icon svg{width:22px;height:22px;stroke:#9ec6ff;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.card h3{font-size:17.5px;margin-bottom:10px;}
.card p{color:var(--text-mid);font-size:14px;line-height:1.78;margin-bottom:16px;}
.card .tags{margin-top:auto;}
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-block;padding:4px 11px;border-radius:6px;
  font-size:12px;color:#9dc4ff;letter-spacing:.4px;
  background:rgba(63,125,255,.12);
  border:1px solid rgba(104,148,224,.28);
}
.grid-x.cards{margin-left:-11px;margin-right:-11px;}
.grid-x.cards > .cell{padding:0 11px 22px;}

/* ============ Split feature ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.split-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-strong);box-shadow:0 30px 64px -34px rgba(0,0,0,.98);}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;transition:transform .5s var(--ease);}
.split-media:hover img{transform:scale(1.04);}
.split-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 20px;
  font-size:13px;color:#cfe0fb;
  background:linear-gradient(180deg,transparent,rgba(3,6,15,.9));
}
.check-list{display:grid;gap:12px;margin:22px 0 26px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.3px;color:var(--text-mid);}
.check-list li b{color:#eaf2ff;font-weight:600;}
.check-list svg{flex:0 0 auto;width:19px;height:19px;margin-top:3px;stroke:var(--cyan);fill:none;stroke-width:2.1;stroke-linecap:round;stroke-linejoin:round;}

/* ============ Demo panel ============ */
.demo-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:stretch;}
.demo-panel{
  padding:26px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(20,36,66,.86),rgba(10,18,36,.9));
  border:1px solid var(--line-strong);
  box-shadow:0 34px 70px -40px rgba(63,125,255,.9),inset 0 1px 0 rgba(255,255,255,.06);
}
.demo-bar{display:flex;align-items:center;gap:8px;margin-bottom:18px;}
.demo-bar i{width:9px;height:9px;border-radius:50%;background:rgba(120,170,255,.32);}
.demo-bar i:first-child{background:rgba(57,216,255,.7);}
.demo-bar span{margin-left:auto;font-size:12px;color:var(--text-dim);letter-spacing:1px;}
.kv{display:grid;gap:12px;}
.kv-row{
  display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:baseline;
  padding:12px 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);
  border:1px solid rgba(104,148,224,.14);
}
.kv-row dt{font-size:12.8px;color:var(--text-dim);margin:0;letter-spacing:.5px;}
.kv-row dd{margin:0;font-size:14.2px;color:#e7f0ff;font-weight:500;}
.kv-row dd em{font-style:normal;color:var(--cyan);font-weight:700;}
.demo-note{
  padding:26px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:14px;
}
.demo-note h3{font-size:17px;margin:0;}
.demo-note p{font-size:14px;color:var(--text-mid);margin:0;}
.demo-note img{border-radius:var(--radius-sm);border:1px solid var(--line);aspect-ratio:16/9;object-fit:cover;width:100%;}

/* ============ Spec table ============ */
.spec-wrap{
  border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.spec-row{
  display:grid;grid-template-columns:200px 1fr;gap:22px;
  padding:18px 26px;
  border-bottom:1px solid rgba(104,148,224,.12);
  transition:background var(--ease);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:rgba(96,150,255,.07);}
.spec-key{font-size:14px;font-weight:600;color:#c9dcff;letter-spacing:.4px;}
.spec-val{font-size:14px;color:var(--text-mid);}

/* ============ Timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative;}
.tl-item{
  position:relative;padding:26px 22px 24px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease);
}
.tl-item:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.tl-dot{
  width:12px;height:12px;border-radius:50%;margin-bottom:16px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  box-shadow:0 0 0 4px rgba(63,125,255,.16),0 0 16px rgba(57,216,255,.8);
}
.tl-item h3{font-size:16px;margin-bottom:8px;}
.tl-item p{font-size:13.6px;color:var(--text-mid);margin:0;}
.tl-step{font-size:12px;letter-spacing:2px;color:var(--text-dim);margin-bottom:6px;}

/* ============ Rank list ============ */
.rank-list{display:grid;gap:12px;}
.rank-item{
  display:grid;grid-template-columns:56px 1fr auto;gap:18px;align-items:center;
  padding:18px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.rank-item:hover{transform:translateX(4px);border-color:var(--line-strong);background:rgba(24,40,72,.72);}
.rank-num{
  font-size:22px;font-weight:800;letter-spacing:1px;
  background:linear-gradient(120deg,#8fc0ff,#5de6ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.rank-body h3{font-size:16px;margin:0 0 4px;}
.rank-body p{font-size:13.4px;color:var(--text-mid);margin:0;}
.rank-tag{font-size:12px;padding:4px 11px;border-radius:6px;color:#9dc4ff;background:rgba(63,125,255,.12);border:1px solid rgba(104,148,224,.28);white-space:nowrap;}

/* ============ Voice bubbles ============ */
.voice-wall{columns:3;column-gap:16px;}
.bubble{
  break-inside:avoid;margin-bottom:16px;padding:20px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease);
}
.bubble:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.bubble p{font-size:13.8px;color:#c7d8f2;margin:0 0 14px;line-height:1.76;}
.bubble-user{display:flex;align-items:center;gap:10px;}
.avatar{
  width:32px;height:32px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#dceaff;
  background:linear-gradient(140deg,rgba(63,125,255,.5),rgba(129,97,255,.4));
  border:1px solid rgba(130,178,255,.4);
}
.bubble-user span{font-size:12.8px;color:var(--text-dim);}

/* ============ Promise ============ */
.promise-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.promise-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px;border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(20,36,66,.7),rgba(10,18,36,.7));
  border:1px solid var(--line);
  transition:border-color var(--ease),transform var(--ease);
}
.promise-item:hover{border-color:var(--line-strong);transform:translateY(-3px);}
.promise-item svg{width:22px;height:22px;flex:0 0 auto;margin-top:2px;stroke:var(--cyan);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.promise-item h3{font-size:15px;margin:0 0 6px;}
.promise-item p{font-size:13.2px;color:var(--text-mid);margin:0;}

/* ============ Topic matrix ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.topic-card{
  position:relative;overflow:hidden;padding:30px 26px;border-radius:var(--radius-lg);
  background:linear-gradient(155deg,rgba(22,40,74,.82),rgba(9,16,32,.92));
  border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.topic-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;
  background:radial-gradient(circle,rgba(63,125,255,.35),transparent 70%);
}
.topic-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 28px 60px -32px rgba(63,125,255,.95);}
.topic-card h3{font-size:18px;margin-bottom:10px;position:relative;}
.topic-card p{font-size:14px;color:var(--text-mid);margin:0 0 18px;position:relative;}
.topic-link{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;color:#8fc0ff;font-weight:600;position:relative;}
.topic-link svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--ease);}
.topic-card:hover .topic-link svg{transform:translateX(4px);}

/* ============ News ============ */
.news-layout{display:grid;grid-template-columns:1.6fr .9fr;gap:26px;align-items:start;}
.news-main{display:grid;gap:14px;}
.news-item{
  display:block;padding:22px 24px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.news-item:hover{transform:translateY(-3px);border-color:var(--line-strong);background:rgba(24,40,72,.7);}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:9px;font-size:12.5px;color:var(--text-dim);}
.news-item h3{font-size:16.5px;margin:0 0 8px;}
.news-item p{font-size:13.8px;color:var(--text-mid);margin:0;}
.news-empty{font-size:14px;color:var(--text-dim);padding:22px;border-radius:var(--radius);border:1px dashed rgba(104,148,224,.28);}
.news-side{
  padding:24px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(20,36,66,.8),rgba(9,16,32,.9));
  border:1px solid var(--line);
}
.side-title{font-size:14px;letter-spacing:1.6px;color:var(--cyan);margin:0 0 16px;font-weight:700;}
.side-item{display:block;padding:12px 0;border-bottom:1px solid rgba(104,148,224,.12);}
.side-item:last-child{border-bottom:0;}
.side-item h4{font-size:14px;margin:0 0 4px;color:#dbe8fb;transition:color var(--ease);}
.side-item:hover h4{color:var(--cyan);}
.side-item span{font-size:12px;color:var(--text-dim);}
.news-more{margin-top:26px;text-align:center;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
  border-radius:var(--radius);border:1px solid var(--line);
  background:var(--panel);overflow:hidden;
  transition:border-color var(--ease);
}
.faq-item[open]{border-color:var(--line-strong);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 24px;
  font-size:15px;font-weight:600;color:#e4eeff;
  display:flex;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";margin-left:auto;font-size:19px;font-weight:400;color:var(--cyan);
  transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item p{padding:0 24px 20px;margin:0;font-size:14px;color:var(--text-mid);line-height:1.8;}

/* ============ Feedback form ============ */
.feedback-wrap{
  display:grid;grid-template-columns:.95fr 1.05fr;gap:36px;align-items:center;
  padding:44px;border-radius:24px;
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(63,125,255,.26), transparent 70%),
    linear-gradient(150deg,rgba(20,36,66,.9),rgba(7,13,26,.96));
  border:1px solid var(--line-strong);
  box-shadow:0 40px 90px -50px rgba(63,125,255,1);
}
.feedback-copy h2{font-size:clamp(22px,2.5vw,29px);margin-bottom:14px;}
.feedback-copy p{color:var(--text-mid);font-size:14.6px;margin:0;}
.form-grid{display:grid;gap:14px;}
.field label{display:block;font-size:12.8px;color:var(--text-dim);margin-bottom:7px;letter-spacing:.6px;}
.field input,.field textarea{
  width:100%;padding:12px 15px;border-radius:var(--radius-sm);
  background:rgba(6,12,26,.72);
  border:1px solid rgba(104,148,224,.26);
  color:#e8f1ff;font-size:14px;line-height:1.6;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#6d82a6;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:rgba(120,180,255,.75);
  background:rgba(10,20,40,.9);
  box-shadow:0 0 0 4px rgba(63,125,255,.14);
}
.field textarea{resize:vertical;min-height:104px;}
.form-grid .btn{width:100%;margin-top:4px;}
.form-hint{font-size:12.4px;color:var(--text-dim);margin:0;}

/* ============ Footer ============ */
.site-footer{
  padding:56px 0 30px;
  background:linear-gradient(180deg,rgba(4,8,18,.6),#02050c);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(104,148,224,.12);}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px;}
.footer-desc{font-size:13.6px;color:var(--text-dim);margin:0;max-width:330px;line-height:1.8;}
.footer-col h3{font-size:14px;letter-spacing:1.4px;color:#d6e5ff;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:13.6px;color:var(--text-dim);transition:color var(--ease),padding-left var(--ease);}
.footer-col a:hover{color:var(--cyan);padding-left:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:22px;font-size:12.6px;color:#5f7397;
}
.footer-bottom a{color:#7f96bd;}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .main-nav > ul > li > a{padding:9px 10px;font-size:13.6px;}
  .split,.demo-grid,.feedback-wrap{grid-template-columns:1fr;gap:30px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(2,1fr);}
  .promise-grid{grid-template-columns:repeat(2,1fr);}
  .voice-wall{columns:2;}
  .news-layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:880px){
  .nav-toggle{display:flex;}
  .header-cta{display:none;}
  .main-nav{
    position:absolute;top:68px;left:0;right:0;
    background:rgba(5,10,22,.98);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    padding:14px 22px 22px;
    display:none;
    max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .main-nav.open{display:block;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav > ul > li > a{padding:13px 14px;font-size:15px;justify-content:space-between;}
  .nav-panel{
    position:static;transform:none;opacity:1;visibility:visible;
    box-shadow:none;background:rgba(96,150,255,.06);
    border:1px solid rgba(104,148,224,.16);
    margin:6px 0 4px;padding:8px;
  }
  .caret{display:none;}
  .hero{padding:66px 0 56px;}
  .hero-lead{text-align:left;font-size:14.8px;}
  .section{padding:60px 0;}
  .topic-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .stat-grid{grid-template-columns:1fr;gap:12px;}
  .timeline{grid-template-columns:1fr;}
  .promise-grid{grid-template-columns:1fr;}
  .voice-wall{columns:1;}
  .hero-search{flex-wrap:wrap;padding:14px;}
  .hero-search input{width:100%;padding:6px 0;}
  .hero-search .btn{width:100%;}
  .rank-item{grid-template-columns:40px 1fr;gap:12px;}
  .rank-tag{grid-column:2;justify-self:start;}
  .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 18px;}
  .feedback-wrap{padding:26px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .card{padding:22px 20px;}
  .brand-text em{display:none;}
}

/* roulang page: category1 */
:root{
 --bg:#050a16;
 --bg-soft:#08101f;
 --bg-deep:#03060f;
 --panel:rgba(19,32,58,.62);
 --panel-strong:rgba(23,39,70,.9);
 --line:rgba(104,148,224,.16);
 --line-strong:rgba(120,170,255,.42);
 --text:#e9f0ff;
 --text-mid:#a9bcdd;
 --text-dim:#7b8fb5;
 --blue:#3f7dff;
 --cyan:#39d8ff;
 --violet:#8161ff;
 --radius:14px;
 --radius-sm:10px;
 --radius-lg:20px;
 --shadow:0 18px 44px -24px rgba(0,0,0,.95);
 --glow:0 0 0 1px rgba(90,150,255,.42), 0 16px 38px -14px rgba(63,125,255,.8);
 --container:1180px;
 --ease:.22s cubic-bezier(.4,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--text);
 background:var(--bg);
 background-image:
 radial-gradient(1100px 520px at 12% -8%, rgba(63,125,255,.20), transparent 62%),
 radial-gradient(900px 460px at 88% 6%, rgba(129,97,255,.16), transparent 66%);
 background-attachment:fixed;
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{list-style:none;padding:0;}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
button,input,textarea,select{font-family:inherit;font-size:1rem;color:inherit;}
button{cursor:pointer;background:none;border:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* ============ Header / Nav ============ */
.site-header{
 position:sticky;top:0;z-index:120;
 height:68px;
 background:rgba(5,10,22,.82);
 backdrop-filter:blur(18px);
 -webkit-backdrop-filter:blur(18px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease), background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(0,0,0,.95);background:rgba(4,8,18,.94);}
.header-inner{height:68px;display:flex;align-items:center;gap:26px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
 width:38px;height:38px;border-radius:11px;flex:0 0 auto;
 display:flex;align-items:center;justify-content:center;
 font-size:19px;font-weight:800;color:#fff;
 background:linear-gradient(140deg,var(--blue),var(--violet));
 box-shadow:0 0 0 1px rgba(140,180,255,.45),0 10px 24px -12px rgba(63,125,255,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.4px;color:#fff;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-dim);letter-spacing:1.4px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
 display:flex;align-items:center;gap:6px;
 padding:9px 14px;border-radius:9px;
 font-size:14.5px;color:var(--text-mid);font-weight:500;
 transition:color var(--ease),background var(--ease);
}
.main-nav > ul > li > a:hover{color:#fff;background:rgba(96,150,255,.12);}
.main-nav > ul > li > a.active{color:#fff;background:rgba(63,125,255,.18);box-shadow:inset 0 0 0 1px rgba(120,170,255,.35);}
.caret{
 display:inline-block;width:6px;height:6px;margin-left:2px;
 border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
 transform:rotate(45deg) translateY(-2px);opacity:.75;
}
.nav-panel{
 position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,-8px);
 min-width:192px;padding:10px;border-radius:14px;
 background:var(--panel-strong);
 border:1px solid var(--line-strong);
 box-shadow:0 26px 52px -26px rgba(0,0,0,.95);
 backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
 opacity:0;visibility:hidden;transition:all var(--ease);
}
.has-panel:hover .nav-panel,.has-panel:focus-within .nav-panel{opacity:1;visibility:visible;transform:translate(-50%,0);}
.nav-panel a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-mid);}
.nav-panel a:hover{background:rgba(96,150,255,.16);color:#fff;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;
 background:rgba(96,150,255,.12);border:1px solid var(--line);
 align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dce8ff;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
 content:"";position:absolute;left:0;width:18px;height:2px;background:#dce8ff;border-radius:2px;transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ Buttons ============ */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 22px;border-radius:9px;border:1px solid transparent;
 font-size:14.5px;font-weight:600;letter-spacing:.3px;line-height:1.4;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{
 color:#fff;
 background:linear-gradient(135deg,#3f7dff,#6f5bff 55%,#39d8ff 130%);
 box-shadow:var(--glow);
}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(140,190,255,.6),0 20px 42px -14px rgba(63,125,255,1);color:#fff;}
.btn-ghost{color:#d6e4ff;background:rgba(96,150,255,.08);border-color:rgba(120,170,255,.34);}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(96,150,255,.18);border-color:rgba(150,200,255,.62);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

/* ============ Section base ============ */
.section{padding:82px 0;position:relative;}
.section--soft{
 background:linear-gradient(180deg,rgba(9,17,34,.92),rgba(6,12,26,.96));
 border-top:1px solid rgba(104,148,224,.1);
 border-bottom:1px solid rgba(104,148,224,.1);
}
.section--deep{background:var(--bg-deep);border-top:1px solid rgba(104,148,224,.1);}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;letter-spacing:2px;font-weight:600;
 color:var(--cyan);text-transform:uppercase;margin-bottom:12px;
}
.section-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head h2{font-size:clamp(23px,2.6vw,31px);font-weight:800;letter-spacing:.5px;line-height:1.35;}
.section-head p{margin-top:14px;color:var(--text-mid);font-size:15px;line-height:1.85;}

/* ============ Hero ============ */
.cat-hero{
 position:relative;overflow:hidden;
 padding:74px 0 66px;
 border-bottom:1px solid rgba(104,148,224,.12);
}
.cat-hero::before{
 content:"";position:absolute;inset:0;
 background-image:linear-gradient(105deg,rgba(5,10,22,.96) 18%,rgba(5,10,22,.72) 58%,rgba(5,10,22,.9) 100%),url('/assets/images/backpic/back-2.webp');
 background-size:cover;background-position:center;
 opacity:.85;z-index:-1;
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center;}
.hero-kicker{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;
 font-size:12.5px;font-weight:600;letter-spacing:1px;
 color:#bfe3ff;background:rgba(63,125,255,.14);
 border:1px solid rgba(120,170,255,.32);margin-bottom:20px;
}
.hero-copy h1{font-size:clamp(28px,3.7vw,42px);line-height:1.28;font-weight:800;letter-spacing:.5px;}
.hero-copy h1 span{
 display:block;margin-top:10px;
 font-size:clamp(18px,2.1vw,24px);font-weight:700;
 background:linear-gradient(100deg,#8ec5ff,#39d8ff 60%,#9d8bff);
 -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{margin-top:18px;color:var(--text-mid);font-size:15.5px;line-height:1.85;max-width:600px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
 display:inline-flex;align-items:center;gap:7px;
 padding:6px 13px;border-radius:999px;font-size:12.5px;font-weight:600;
 color:#c9dcff;background:rgba(19,32,58,.72);
 border:1px solid rgba(104,148,224,.26);
 transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.tag:hover{border-color:rgba(140,190,255,.6);color:#fff;transform:translateY(-1px);}
.tag i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(104,148,224,.16);}
.hero-stat strong{display:block;font-size:22px;font-weight:800;color:#fff;letter-spacing:.5px;}
.hero-stat span{font-size:12.5px;color:var(--text-dim);letter-spacing:.6px;}

.glass{
 background:linear-gradient(160deg,rgba(24,41,74,.86),rgba(11,20,38,.9));
 border:1px solid rgba(120,170,255,.3);
 border-radius:var(--radius-lg);
 box-shadow:0 30px 60px -34px rgba(0,0,0,1),inset 0 1px 0 rgba(255,255,255,.06);
 backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.hero-panel{padding:26px 26px 22px;}
.panel-title{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid rgba(104,148,224,.18);}
.panel-title h2{font-size:16px;font-weight:700;letter-spacing:.6px;}
.panel-title span{font-size:11.5px;letter-spacing:1px;color:var(--cyan);border:1px solid rgba(57,216,255,.4);border-radius:999px;padding:3px 9px;}
.panel-rows{margin-top:6px;}
.panel-row{
 display:flex;align-items:center;gap:14px;
 padding:14px 4px;border-bottom:1px dashed rgba(104,148,224,.16);
}
.panel-row:last-child{border-bottom:none;}
.panel-idx{
 width:30px;height:30px;flex:0 0 auto;border-radius:9px;
 display:flex;align-items:center;justify-content:center;
 font-size:13px;font-weight:700;color:#cfe4ff;
 background:rgba(63,125,255,.18);border:1px solid rgba(120,170,255,.32);
}
.panel-row h3{font-size:14.5px;font-weight:600;}
.panel-row p{font-size:12.5px;color:var(--text-dim);line-height:1.6;}
.panel-foot{margin-top:16px;font-size:12.5px;color:var(--text-dim);display:flex;justify-content:space-between;gap:10px;}

/* ============ Cards grid ============ */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card{
 position:relative;
 background:linear-gradient(165deg,rgba(23,39,70,.7),rgba(11,20,38,.78));
 border:1px solid var(--line);
 border-radius:var(--radius);
 padding:24px 22px;
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 46px -28px rgba(0,0,0,1),0 0 0 1px rgba(120,170,255,.24);}
.card-icon{
 width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
 margin-bottom:16px;color:var(--cyan);
 background:rgba(57,216,255,.1);border:1px solid rgba(57,216,255,.28);
}
.card-icon svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.card h3{font-size:17px;font-weight:700;letter-spacing:.3px;}
.card p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-mid);}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.mini-tag{
 font-size:11.5px;letter-spacing:.4px;padding:3px 9px;border-radius:6px;
 color:#a8c4ee;background:rgba(96,150,255,.1);border:1px solid rgba(104,148,224,.22);
}

/* ============ Version block ============ */
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:44px;align-items:start;}
.version-list{display:flex;flex-direction:column;gap:0;}
.version-row{
 display:grid;grid-template-columns:112px 1fr auto;gap:16px;align-items:center;
 padding:16px 18px;border-radius:12px;
 border:1px solid rgba(104,148,224,.14);
 background:rgba(13,23,42,.6);
 margin-bottom:10px;
 transition:border-color var(--ease),background var(--ease),transform var(--ease);
}
.version-row:hover{border-color:rgba(120,170,255,.45);background:rgba(19,32,58,.78);transform:translateX(3px);}
.version-code{font-size:13px;font-weight:700;color:var(--cyan);letter-spacing:.6px;}
.version-row h3{font-size:14.5px;font-weight:600;}
.version-row p{font-size:12.5px;color:var(--text-dim);line-height:1.6;}
.version-flag{font-size:11.5px;padding:3px 9px;border-radius:6px;color:#b9d5ff;background:rgba(63,125,255,.14);border:1px solid rgba(120,170,255,.3);white-space:nowrap;}
.verdict-box{
 margin-top:22px;padding:20px 22px;border-radius:var(--radius);
 border-left:3px solid var(--cyan);
 background:rgba(57,216,255,.07);
 font-size:14px;color:var(--text-mid);line-height:1.8;
}
.verdict-box strong{color:#fff;}

/* ============ Steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
.step{
 position:relative;padding:26px 22px 24px;
 border-radius:var(--radius);border:1px solid var(--line);
 background:rgba(13,23,42,.66);
 transition:border-color var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(120,170,255,.5);transform:translateY(-3px);}
.step::before{
 counter-increment:step;content:"0" counter(step);
 display:block;font-size:13px;font-weight:800;letter-spacing:2px;
 color:var(--violet);margin-bottom:12px;
}
.step h3{font-size:16px;font-weight:700;}
.step p{margin-top:9px;font-size:13.5px;color:var(--text-mid);line-height:1.75;}

/* ============ Scene ============ */
.scene-card{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.scene-card img{width:100%;height:190px;object-fit:cover;border-bottom:1px solid var(--line);}
.scene-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.scene-body h3{font-size:17px;font-weight:700;}
.scene-body p{font-size:13.8px;color:var(--text-mid);line-height:1.78;}
.scene-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-dim);padding-top:12px;border-top:1px dashed rgba(104,148,224,.18);margin-top:auto;}

/* ============ Spec table ============ */
.spec-table{width:100%;border-collapse:separate;border-spacing:0 8px;}
.spec-table th{
 text-align:left;font-size:12px;letter-spacing:1.4px;color:var(--text-dim);
 font-weight:600;padding:0 16px 6px;
}
.spec-table td{
 background:rgba(13,23,42,.66);
 border-top:1px solid rgba(104,148,224,.14);
 border-bottom:1px solid rgba(104,148,224,.14);
 padding:15px 16px;font-size:14px;color:var(--text-mid);vertical-align:middle;
}
.spec-table td:first-child{border-left:1px solid rgba(104,148,224,.14);border-radius:10px 0 0 10px;color:#fff;font-weight:600;}
.spec-table td:last-child{border-right:1px solid rgba(104,148,224,.14);border-radius:0 10px 10px 0;}
.spec-table tr:hover td{background:rgba(19,32,58,.85);border-color:rgba(120,170,255,.34);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
 border:1px solid var(--line);border-radius:var(--radius-sm);
 background:rgba(13,23,42,.6);overflow:hidden;
 transition:border-color var(--ease),background var(--ease);
}
.faq-item[open]{border-color:rgba(120,170,255,.45);background:rgba(19,32,58,.8);}
.faq-item summary{
 list-style:none;cursor:pointer;
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:17px 20px;font-size:15px;font-weight:600;color:#e6efff;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";flex:0 0 auto;width:24px;height:24px;line-height:22px;text-align:center;
 border-radius:7px;color:var(--cyan);border:1px solid rgba(57,216,255,.35);
 font-size:15px;transition:transform var(--ease);
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg);}
.faq-item p{padding:0 20px 18px;font-size:14px;line-height:1.85;color:var(--text-mid);}

/* ============ CTA & form ============ */
.cta-wrap{
 position:relative;overflow:hidden;
 border-radius:var(--radius-lg);
 border:1px solid rgba(120,170,255,.3);
 background:
 linear-gradient(120deg,rgba(23,39,70,.94),rgba(9,16,34,.96)),
 url('/assets/images/backpic/back-5.webp') center/cover no-repeat;
 padding:44px 42px;
 display:grid;grid-template-columns:1fr .92fr;gap:40px;align-items:center;
 box-shadow:0 34px 70px -40px rgba(0,0,0,1);
}
.cta-copy h2{font-size:clamp(22px,2.4vw,29px);font-weight:800;line-height:1.36;}
.cta-copy p{margin-top:14px;font-size:14.5px;color:var(--text-mid);line-height:1.85;}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:20px;}
.cta-points li{display:flex;gap:10px;font-size:13.8px;color:var(--text-mid);}
.cta-points li::before{content:"";width:7px;height:7px;margin-top:9px;border-radius:2px;background:var(--cyan);flex:0 0 auto;}
.feedback-form{display:flex;flex-direction:column;gap:13px;}
.field label{display:block;font-size:12.5px;letter-spacing:.8px;color:var(--text-dim);margin-bottom:6px;}
.field input,.field textarea{
 width:100%;padding:11px 14px;border-radius:9px;
 background:rgba(6,12,26,.8);border:1px solid rgba(104,148,224,.26);
 color:var(--text);font-size:14px;line-height:1.6;
 transition:border-color var(--ease),box-shadow var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#5f7196;}
.field input:focus,.field textarea:focus{
 outline:none;border-color:rgba(120,170,255,.75);
 box-shadow:0 0 0 3px rgba(63,125,255,.22);
}
.field textarea{min-height:96px;resize:vertical;}
.form-note{font-size:12px;color:var(--text-dim);line-height:1.6;}
.form-tip{display:none;font-size:13px;color:#8ff0d0;background:rgba(57,216,255,.1);border:1px solid rgba(57,216,255,.35);border-radius:8px;padding:9px 13px;}
.form-tip.show{display:block;}

/* ============ Footer ============ */
.site-footer{
 margin-top:0;padding:64px 0 26px;
 background:linear-gradient(180deg,rgba(4,8,18,.9),rgba(2,5,12,1));
 border-top:1px solid rgba(104,148,224,.14);
}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-desc{font-size:13.8px;color:var(--text-dim);line-height:1.85;max-width:420px;}
.footer-col h3{font-size:14px;font-weight:700;letter-spacing:.8px;margin-bottom:14px;color:#fff;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.5px;color:var(--text-dim);}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
 margin-top:40px;padding-top:20px;
 border-top:1px solid rgba(104,148,224,.14);
 display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
 font-size:12.5px;color:#66799e;
}
.footer-bottom a{color:#8ba6cf;}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:34px;}
 .hero-panel{max-width:640px;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .split{grid-template-columns:1fr;gap:30px;}
 .steps{grid-template-columns:repeat(2,1fr);}
 .cta-wrap{grid-template-columns:1fr;padding:34px 28px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
 .main-nav > ul > li > a{padding:9px 11px;font-size:14px;}
 .brand-text em{display:none;}
}
@media (max-width:860px){
 .nav-toggle{display:flex;}
 .header-cta{display:none;}
 .main-nav{
  position:absolute;top:68px;left:0;right:0;
  background:rgba(6,12,26,.98);
  border-bottom:1px solid var(--line-strong);
  box-shadow:0 22px 44px -26px rgba(0,0,0,1);
  padding:10px 18px 18px;
  display:none;
 }
 .main-nav.is-open{display:block;}
 .main-nav ul{flex-direction:column;align-items:stretch;gap:2px;}
 .main-nav > ul > li > a{padding:12px 10px;font-size:15px;justify-content:space-between;}
 .nav-panel{
  position:static;transform:none;opacity:1;visibility:visible;
  box-shadow:none;background:rgba(19,32,58,.5);
  border:1px solid rgba(104,148,224,.14);
  margin:4px 0 8px;padding:6px;
 }
 .grid-3{grid-template-columns:1fr;}
 .section{padding:60px 0;}
 .cat-hero{padding:52px 0 48px;}
}
@media (max-width:640px){
 .container{padding:0 16px;}
 .grid-4,.steps,.grid-2{grid-template-columns:1fr;}
 .brand-text strong{font-size:14.5px;}
 .hero-copy h1{font-size:26px;}
 .hero-stats{gap:18px;}
 .hero-stat strong{font-size:19px;}
 .version-row{grid-template-columns:1fr;gap:8px;align-items:start;}
 .version-flag{justify-self:start;}
 .spec-table{display:block;overflow-x:auto;white-space:nowrap;}
 .footer-grid{grid-template-columns:1fr;}
 .footer-bottom{flex-direction:column;}
 .cta-wrap{padding:26px 18px;border-radius:var(--radius);}
 .section-head{margin-bottom:28px;}
 .faq-item summary{font-size:14px;padding:15px 16px;}
 .btn{width:100%;}
 .hero-actions .btn{width:auto;}
}
@media (max-width:520px){
 .hero-actions{flex-direction:column;align-items:stretch;}
 .hero-actions .btn{width:100%;}
 .hero-panel{padding:20px 18px;}
 .scene-card img{height:164px;}
}

/* roulang page: article */
:root{
 --bg:#050a16;
 --bg-soft:#08101f;
 --bg-deep:#03060f;
 --panel:rgba(19,32,58,.62);
 --panel-strong:rgba(23,39,70,.9);
 --line:rgba(104,148,224,.16);
 --line-strong:rgba(120,170,255,.42);
 --text:#e9f0ff;
 --text-mid:#a9bcdd;
 --text-dim:#7b8fb5;
 --blue:#3f7dff;
 --cyan:#39d8ff;
 --violet:#8161ff;
 --radius:14px;
 --radius-sm:10px;
 --radius-lg:20px;
 --shadow:0 18px 44px -24px rgba(0,0,0,.95);
 --glow:0 0 0 1px rgba(90,150,255,.42), 0 16px 38px -14px rgba(63,125,255,.8);
 --container:1180px;
 --ease:.22s cubic-bezier(.4,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--text);
 background:var(--bg);
 background-image:
 radial-gradient(1100px 520px at 12% -8%, rgba(63,125,255,.20), transparent 62%),
 radial-gradient(900px 460px at 88% 6%, rgba(129,97,255,.16), transparent 66%);
 background-attachment:fixed;
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
button{font:inherit;background:none;border:0;color:inherit;cursor:pointer;}
input,textarea,select{font:inherit;}
::selection{background:rgba(63,125,255,.42);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* ============ Header / Nav ============ */
.site-header{
 position:sticky;top:0;z-index:120;
 height:68px;
 background:rgba(5,10,22,.82);
 backdrop-filter:blur(18px);
 -webkit-backdrop-filter:blur(18px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease), background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(0,0,0,.95);background:rgba(4,8,18,.94);}
.header-inner{height:68px;display:flex;align-items:center;gap:26px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
 width:38px;height:38px;border-radius:11px;flex:0 0 auto;
 display:flex;align-items:center;justify-content:center;
 font-size:19px;font-weight:800;color:#fff;
 background:linear-gradient(140deg,var(--blue),var(--violet));
 box-shadow:0 0 0 1px rgba(140,180,255,.45),0 10px 24px -12px rgba(63,125,255,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.4px;color:#fff;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-dim);letter-spacing:1.4px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
 display:flex;align-items:center;gap:6px;
 padding:9px 14px;border-radius:9px;
 font-size:14.5px;color:var(--text-mid);font-weight:500;
 transition:color var(--ease),background var(--ease),box-shadow var(--ease);
}
.main-nav > ul > li > a:hover{color:#fff;background:rgba(96,150,255,.12);}
.main-nav > ul > li > a.active{color:#fff;background:rgba(63,125,255,.18);box-shadow:inset 0 0 0 1px rgba(120,170,255,.35);}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.65;}
.nav-panel{
 position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,-8px);
 min-width:196px;padding:10px;border-radius:14px;
 background:var(--panel-strong);
 border:1px solid var(--line-strong);
 box-shadow:0 26px 52px -26px rgba(0,0,0,.95);
 backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
 opacity:0;visibility:hidden;transition:all var(--ease);
}
.has-panel:hover .nav-panel,.has-panel:focus-within .nav-panel{opacity:1;visibility:visible;transform:translate(-50%,0);}
.nav-panel a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-mid);}
.nav-panel a:hover{background:rgba(96,150,255,.16);color:#fff;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;
 background:rgba(96,150,255,.12);border:1px solid var(--line);
 align-items:center;justify-content:center;margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dce8ff;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
 content:"";position:absolute;left:0;width:18px;height:2px;background:#dce8ff;border-radius:2px;transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ Buttons / Tags ============ */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 22px;border-radius:9px;border:1px solid transparent;
 font-size:14.5px;font-weight:600;letter-spacing:.3px;line-height:1.4;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{
 color:#fff;
 background:linear-gradient(135deg,#3f7dff,#6f5bff 55%,#39d8ff 130%);
 box-shadow:var(--glow);
}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(140,190,255,.6),0 20px 42px -14px rgba(63,125,255,1);color:#fff;}
.btn-ghost{color:#d6e4ff;background:rgba(96,150,255,.08);border-color:rgba(120,170,255,.34);}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(96,150,255,.18);border-color:rgba(150,200,255,.62);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 padding:5px 12px;border-radius:999px;
 font-size:12.5px;font-weight:600;letter-spacing:.4px;
 color:#bfe4ff;background:rgba(57,216,255,.12);
 border:1px solid rgba(57,216,255,.34);
}
.tag--violet{color:#d6cfff;background:rgba(129,97,255,.14);border-color:rgba(129,97,255,.4);}
.tag--blue{color:#cbe0ff;background:rgba(63,125,255,.16);border-color:rgba(120,170,255,.42);}

/* ============ Section base ============ */
.section{padding:76px 0;position:relative;}
.section--soft{
 background:linear-gradient(180deg,rgba(9,17,34,.92),rgba(6,12,26,.96));
 border-top:1px solid rgba(104,148,224,.1);
 border-bottom:1px solid rgba(104,148,224,.1);
}
.section--deep{background:var(--bg-deep);border-top:1px solid rgba(104,148,224,.1);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;letter-spacing:2px;font-weight:600;
 color:var(--cyan);text-transform:uppercase;margin-bottom:12px;
}
.section-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head h2{font-size:clamp(22px,2.6vw,29px);font-weight:800;color:#fff;letter-spacing:.3px;line-height:1.35;}
.section-head p{margin-top:12px;font-size:15px;color:var(--text-mid);line-height:1.85;}

/* ============ Article Hero ============ */
.article-hero{
 position:relative;
 padding:54px 0 64px;
 border-bottom:1px solid var(--line);
 background-image:
 linear-gradient(120deg,rgba(3,6,15,.94),rgba(5,12,26,.78)),
 url("/assets/images/backpic/back-2.webp");
 background-size:cover;
 background-position:center;
}
.crumbs{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-dim);margin-bottom:22px;flex-wrap:wrap;}
.crumbs a{color:var(--text-mid);}
.crumbs a:hover{color:var(--cyan);}
.crumbs span{opacity:.5;}
.hero-grid{display:grid;grid-template-columns:1.35fr .85fr;gap:44px;align-items:center;}
.hero-title{
 font-size:clamp(26px,3.6vw,40px);
 line-height:1.32;font-weight:800;color:#fff;letter-spacing:.4px;
}
.hero-lead{margin-top:16px;font-size:15.5px;color:var(--text-mid);line-height:1.85;max-width:640px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;align-items:center;}
.meta-chip{
 display:inline-flex;align-items:center;gap:7px;
 padding:6px 13px;border-radius:8px;
 font-size:13px;color:var(--text-mid);
 background:rgba(19,32,58,.66);
 border:1px solid var(--line);
}
.meta-chip b{color:#dce9ff;font-weight:600;}
.hero-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(120,170,255,.28);box-shadow:var(--shadow);}
.hero-figure img{width:100%;height:280px;object-fit:cover;transition:transform .5s var(--ease);}
.hero-figure:hover img{transform:scale(1.04);}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,6,15,0) 40%,rgba(3,6,15,.82));pointer-events:none;}
.figure-badge{
 position:absolute;left:16px;bottom:16px;z-index:2;
 padding:9px 14px;border-radius:10px;
 font-size:12.5px;letter-spacing:.6px;color:#e6f1ff;
 background:rgba(9,18,36,.82);border:1px solid rgba(120,170,255,.34);
 backdrop-filter:blur(8px);
}
.figure-badge b{color:var(--cyan);}

/* ============ Cards ============ */
.card-grid{display:grid;gap:20px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.info-card{
 position:relative;
 padding:24px 22px;
 border-radius:var(--radius);
 background:var(--panel);
 border:1px solid var(--line);
 box-shadow:var(--shadow);
 backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
 overflow:hidden;
}
.info-card::before{
 content:"";position:absolute;inset:0 0 auto 0;height:2px;
 background:linear-gradient(90deg,rgba(63,125,255,.9),rgba(57,216,255,.7),transparent);
 opacity:.7;
}
.info-card:hover{transform:translateY(-4px);box-shadow:0 26px 54px -30px rgba(0,0,0,1),0 0 0 1px rgba(120,170,255,.36);border-color:rgba(120,170,255,.42);background:rgba(24,39,70,.72);}
.card-icon{
 width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;
 background:rgba(63,125,255,.16);border:1px solid rgba(120,170,255,.3);color:var(--cyan);margin-bottom:16px;
}
.card-icon svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.info-card h3{font-size:16.5px;font-weight:700;color:#fff;margin-bottom:9px;letter-spacing:.2px;}
.info-card p{font-size:14px;line-height:1.8;color:var(--text-mid);}
.card-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px;}
.card-tags span{font-size:11.5px;letter-spacing:.4px;color:var(--text-dim);padding:3px 9px;border-radius:6px;border:1px solid var(--line);background:rgba(9,18,36,.6);}

/* ============ Entry content ============ */
.entry-wrap{max-width:860px;margin:0 auto;}
.entry{font-size:16px;line-height:1.85;color:#dbe6fb;}
.entry h2{
 font-size:22px;font-weight:800;color:#fff;margin:38px 0 14px;
 padding-left:15px;position:relative;line-height:1.45;
}
.entry h2::before{
 content:"";position:absolute;left:0;top:.32em;bottom:.32em;width:3px;border-radius:2px;
 background:linear-gradient(180deg,var(--cyan),var(--blue));
}
.entry h3{font-size:18px;font-weight:700;color:#eaf2ff;margin:28px 0 10px;}
.entry h4{font-size:16px;font-weight:700;color:#e2ecff;margin:22px 0 8px;}
.entry p{margin:0 0 16px;}
.entry ul{margin:0 0 18px;}
.entry ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.entry ul li::before{
 content:"";position:absolute;left:2px;top:.74em;width:6px;height:6px;border-radius:50%;
 background:var(--cyan);box-shadow:0 0 8px rgba(57,216,255,.85);
}
.entry ol{list-style:decimal;margin:0 0 18px;padding-left:22px;}
.entry ol li{margin-bottom:9px;padding-left:4px;}
.entry strong{color:#fff;}
.entry em{color:var(--cyan);font-style:normal;}
.entry a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.entry a:hover{color:#8ef0ff;}
.entry blockquote{
 margin:22px 0;padding:16px 20px;border-left:3px solid var(--blue);
 background:rgba(63,125,255,.1);border-radius:0 12px 12px 0;color:var(--text-mid);font-size:15px;
}
.entry img{border-radius:12px;margin:18px 0;border:1px solid var(--line);}
.entry table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px;background:rgba(9,18,36,.5);border-radius:12px;overflow:hidden;}
.entry th,.entry td{padding:11px 14px;border:1px solid rgba(104,148,224,.16);text-align:left;}
.entry th{background:rgba(63,125,255,.16);color:#fff;font-weight:600;}
.entry hr{border:0;border-top:1px solid var(--line);margin:30px 0;}
.entry-empty{
 padding:56px 26px;text-align:center;border-radius:var(--radius-lg);
 background:var(--panel);border:1px dashed rgba(120,170,255,.4);
}
.entry-empty h2{font-size:22px;color:#fff;padding:0;margin:0 0 12px;}
.entry-empty h2::before{display:none;}
.entry-empty p{color:var(--text-mid);margin-bottom:22px;}

/* ============ Data table ============ */
.table-shell{
 border-radius:var(--radius);overflow:hidden;
 border:1px solid var(--line);background:rgba(9,18,36,.55);
 box-shadow:var(--shadow);
}
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;}
.spec-table caption{
 text-align:left;padding:16px 20px;font-size:13px;color:var(--text-dim);
 border-bottom:1px solid var(--line);background:rgba(19,32,58,.6);
}
.spec-table th,.spec-table td{padding:13px 18px;text-align:left;border-bottom:1px solid rgba(104,148,224,.12);}
.spec-table thead th{font-size:13px;letter-spacing:.8px;color:#cfe0ff;background:rgba(63,125,255,.14);font-weight:700;}
.spec-table tbody tr{transition:background var(--ease);}
.spec-table tbody tr:hover{background:rgba(63,125,255,.09);}
.spec-table tbody tr:last-child td{border-bottom:0;}
.spec-table td:first-child{color:#fff;font-weight:600;white-space:nowrap;}
.spec-table td{color:var(--text-mid);}

/* ============ Scenes ============ */
.scene-card{
 display:grid;grid-template-columns:56px 1fr;gap:16px;
 padding:22px;border-radius:var(--radius);
 background:var(--panel);border:1px solid var(--line);
 transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.scene-card:hover{transform:translateY(-3px);border-color:rgba(120,170,255,.4);box-shadow:0 22px 46px -28px rgba(0,0,0,1);}
.scene-num{
 width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
 font-size:18px;font-weight:800;color:#cfe4ff;
 background:linear-gradient(150deg,rgba(63,125,255,.28),rgba(129,97,255,.22));
 border:1px solid rgba(120,170,255,.34);
}
.scene-card h3{font-size:16px;color:#fff;margin-bottom:6px;font-weight:700;}
.scene-card p{font-size:14px;line-height:1.8;color:var(--text-mid);}

/* ============ Rank list ============ */
.rank-list{display:grid;gap:14px;}
.rank-item{
 display:grid;grid-template-columns:46px 1fr auto;gap:16px;align-items:center;
 padding:16px 20px;border-radius:var(--radius);
 background:var(--panel);border:1px solid var(--line);
 transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.rank-item:hover{transform:translateY(-2px);border-color:rgba(120,170,255,.42);background:rgba(24,39,70,.72);}
.rank-no{
 font-size:15px;font-weight:800;color:var(--cyan);letter-spacing:1px;
 width:46px;height:36px;border-radius:9px;display:flex;align-items:center;justify-content:center;
 background:rgba(57,216,255,.1);border:1px solid rgba(57,216,255,.28);
}
.rank-main h3{font-size:15.5px;color:#fff;font-weight:700;margin-bottom:4px;}
.rank-main p{font-size:13.5px;color:var(--text-dim);line-height:1.7;}
.rank-bar{width:150px;height:7px;border-radius:999px;background:rgba(104,148,224,.16);overflow:hidden;}
.rank-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--cyan));}

/* ============ Demo ============ */
.demo-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;}
.demo-figure{border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(120,170,255,.26);box-shadow:var(--shadow);}
.demo-figure img{width:100%;height:330px;object-fit:cover;}
.demo-list{display:grid;gap:14px;margin-top:20px;}
.demo-step{
 padding:15px 18px;border-radius:12px;
 background:rgba(9,18,36,.62);border:1px solid var(--line);
 font-size:14px;color:var(--text-mid);line-height:1.8;
}
.demo-step b{color:#fff;display:block;margin-bottom:3px;font-size:14.5px;}
.demo-step span{color:var(--cyan);font-weight:600;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
 border-radius:var(--radius);border:1px solid var(--line);
 background:var(--panel);overflow:hidden;
 transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(120,170,255,.42);box-shadow:0 20px 46px -30px rgba(0,0,0,1);}
.faq-item summary{
 list-style:none;cursor:pointer;padding:17px 22px;
 font-size:15.5px;font-weight:600;color:#eef4ff;
 display:flex;align-items:center;justify-content:space-between;gap:14px;
 transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cyan);}
.faq-item summary::after{
 content:"+";font-size:19px;font-weight:400;color:var(--cyan);line-height:1;
 transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{padding:0 22px 18px;font-size:14.5px;line-height:1.85;color:var(--text-mid);}

/* ============ CTA ============ */
.cta-band{
 position:relative;overflow:hidden;
 padding:46px 40px;border-radius:var(--radius-lg);
 background-image:linear-gradient(120deg,rgba(9,20,42,.94),rgba(20,18,54,.88)),url("/assets/images/backpic/back-5.webp");
 background-size:cover;background-position:center;
 border:1px solid rgba(120,170,255,.32);
 box-shadow:var(--shadow);
 display:grid;grid-template-columns:1.5fr auto;gap:28px;align-items:center;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);color:#fff;font-weight:800;margin-bottom:10px;}
.cta-band p{font-size:14.5px;color:var(--text-mid);line-height:1.85;max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ Footer ============ */
.site-footer{padding:58px 0 26px;background:var(--bg-deep);border-top:1px solid var(--line);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:38px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--text-dim);line-height:1.85;max-width:370px;}
.footer-col h3{font-size:14px;color:#fff;margin-bottom:14px;letter-spacing:.6px;font-weight:700;}
.footer-col ul{display:grid;gap:9px;}
.footer-col a{font-size:13.8px;color:var(--text-mid);}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
 margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
 display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
 font-size:13px;color:var(--text-dim);
}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1040px){
 .header-cta{display:none;}
 .nav-toggle{display:flex;}
 .main-nav{
  position:fixed;top:68px;left:0;right:0;margin:0;
  padding:12px 20px 20px;
  background:rgba(5,10,22,.98);
  border-bottom:1px solid var(--line);
  box-shadow:0 24px 44px -24px rgba(0,0,0,1);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  display:none;max-height:calc(100vh - 68px);overflow-y:auto;
 }
 .main-nav.is-open{display:block;}
 .main-nav ul{flex-direction:column;align-items:stretch;gap:2px;}
 .main-nav > ul > li > a{padding:12px 14px;font-size:15px;justify-content:space-between;}
 .nav-panel{display:none;}
 .hero-grid{grid-template-columns:1fr;gap:30px;}
 .hero-figure{order:-1;}
 .hero-figure img{height:220px;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .grid-3{grid-template-columns:repeat(2,1fr);}
 .demo-grid{grid-template-columns:1fr;}
 .demo-figure img{height:260px;}
 .cta-band{grid-template-columns:1fr;padding:36px 26px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
 .footer-grid > div:first-child{grid-column:1 / -1;}
}
@media (max-width:768px){
 .section{padding:56px 0;}
 .article-hero{padding:38px 0 46px;}
 .container{padding:0 18px;}
 .grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}
 .rank-item{grid-template-columns:40px 1fr;row-gap:10px;}
 .rank-bar{grid-column:1 / -1;width:100%;}
 .spec-table{font-size:13.5px;}
 .spec-table th,.spec-table td{padding:10px 12px;}
 .table-shell{overflow-x:auto;}
 .entry{font-size:15.5px;}
 .entry h2{font-size:20px;}
 .footer-grid{grid-template-columns:1fr;}
 .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
 .brand-text strong{font-size:14.5px;}
 .brand-text em{display:none;}
 .hero-title{font-size:25px;}
 .hero-lead{font-size:14.5px;}
 .btn{padding:10px 18px;font-size:14px;}
 .cta-actions{flex-direction:column;align-items:stretch;}
 .cta-actions .btn{width:100%;}
 .info-card{padding:20px 18px;}
 .scene-card{grid-template-columns:1fr;}
 .scene-num{width:46px;height:46px;border-radius:12px;font-size:16px;}
}

/* roulang page: category3 */
:root{
 --bg:#050a16;
 --bg-soft:#08101f;
 --bg-deep:#03060f;
 --panel:rgba(19,32,58,.62);
 --panel-strong:rgba(23,39,70,.9);
 --line:rgba(104,148,224,.16);
 --line-strong:rgba(120,170,255,.42);
 --text:#e9f0ff;
 --text-mid:#a9bcdd;
 --text-dim:#7b8fb5;
 --blue:#3f7dff;
 --cyan:#39d8ff;
 --violet:#8161ff;
 --radius:14px;
 --radius-sm:10px;
 --radius-lg:20px;
 --shadow:0 18px 44px -24px rgba(0,0,0,.95);
 --glow:0 0 0 1px rgba(90,150,255,.42), 0 16px 38px -14px rgba(63,125,255,.8);
 --container:1180px;
 --ease:.22s cubic-bezier(.4,.7,.3,1);
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.78;color:var(--text);background:var(--bg);
 background-image:
  radial-gradient(1100px 520px at 12% -8%, rgba(63,125,255,.20), transparent 62%),
  radial-gradient(900px 460px at 88% 6%, rgba(129,97,255,.16), transparent 66%);
 background-attachment:fixed;-webkit-font-smoothing:antialiased;
}
*,*::before,*::after{box-sizing:border-box;}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
p{margin:0 0 14px;}
h1,h2,h3,h4{margin:0 0 14px;line-height:1.3;font-weight:800;letter-spacing:.2px;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:1rem;color:inherit;}
button{cursor:pointer;border:0;background:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* ============ Header / Nav ============ */
.site-header{
 position:sticky;top:0;z-index:120;height:68px;
 background:rgba(5,10,22,.82);
 backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(0,0,0,.95);background:rgba(4,8,18,.94);}
.header-inner{height:68px;display:flex;align-items:center;gap:26px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
 width:38px;height:38px;border-radius:11px;flex:0 0 auto;
 display:flex;align-items:center;justify-content:center;
 font-size:19px;font-weight:800;color:#fff;
 background:linear-gradient(140deg,var(--blue),var(--violet));
 box-shadow:0 0 0 1px rgba(140,180,255,.45),0 10px 24px -12px rgba(63,125,255,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.4px;color:#fff;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-dim);letter-spacing:1.4px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
 display:flex;align-items:center;gap:6px;padding:9px 14px;border-radius:9px;
 font-size:14.5px;color:var(--text-mid);font-weight:500;
 transition:color var(--ease),background var(--ease);
}
.main-nav > ul > li > a:hover{color:#fff;background:rgba(96,150,255,.12);}
.main-nav > ul > li > a.active{color:#fff;background:rgba(63,125,255,.18);box-shadow:inset 0 0 0 1px rgba(120,170,255,.35);}
.nav-panel{
 position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,-8px);
 min-width:192px;padding:10px;border-radius:14px;
 background:var(--panel-strong);border:1px solid var(--line-strong);
 box-shadow:0 26px 52px -26px rgba(0,0,0,.95);
 backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
 opacity:0;visibility:hidden;transition:all var(--ease);
}
.has-panel:hover .nav-panel,.has-panel:focus-within .nav-panel{opacity:1;visibility:visible;transform:translate(-50%,0);}
.nav-panel a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-mid);}
.nav-panel a:hover{background:rgba(96,150,255,.16);color:#fff;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;
 background:rgba(96,150,255,.12);border:1px solid var(--line);
 align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dce8ff;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
 content:"";position:absolute;left:0;width:18px;height:2px;background:#dce8ff;border-radius:2px;transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ Buttons ============ */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 22px;border-radius:9px;border:1px solid transparent;
 font-size:14.5px;font-weight:600;letter-spacing:.3px;line-height:1.4;white-space:nowrap;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn-primary{color:#fff;background:linear-gradient(135deg,#3f7dff,#6f5bff 55%,#39d8ff 130%);box-shadow:var(--glow);}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(140,190,255,.6),0 20px 42px -14px rgba(63,125,255,1);color:#fff;}
.btn-ghost{color:#d6e4ff;background:rgba(96,150,255,.08);border-color:rgba(120,170,255,.34);}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(96,150,255,.18);border-color:rgba(150,200,255,.62);color:#fff;transform:translateY(-2px);}
.btn-sm{padding:8px 16px;font-size:13.5px;}
.btn:active{transform:translateY(0);}

/* ============ Section base ============ */
main{display:block;}
.section{padding:80px 0;position:relative;}
.section--soft{
 background:linear-gradient(180deg,rgba(9,17,34,.92),rgba(6,12,26,.96));
 border-top:1px solid rgba(104,148,224,.1);border-bottom:1px solid rgba(104,148,224,.1);
}
.section--deep{background:var(--bg-deep);border-top:1px solid rgba(104,148,224,.1);}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
 display:inline-flex;align-items:center;gap:9px;margin-bottom:12px;
 font-size:12.5px;letter-spacing:2px;font-weight:700;color:var(--cyan);text-transform:uppercase;
}
.section-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head.center .section-kicker::after{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,var(--cyan));}
.section-title{font-size:30px;line-height:1.32;}
.section-sub{color:var(--text-mid);font-size:15px;margin:0;}

/* ============ Hero ============ */
.hero{
 position:relative;overflow:hidden;padding:70px 0 78px;
 background-image:linear-gradient(180deg,rgba(4,8,18,.92),rgba(4,8,18,.97)),url('/assets/images/backpic/back-2.webp');
 background-size:cover;background-position:center;
 border-bottom:1px solid var(--line);
}
.hero::after{
 content:"";position:absolute;inset:auto -10% -55% 55%;height:520px;
 background:radial-gradient(closest-side,rgba(57,216,255,.20),transparent 72%);
 pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center;position:relative;z-index:2;}
.hero-copy .kicker{
 display:inline-flex;align-items:center;gap:8px;padding:6px 14px;margin-bottom:18px;
 border-radius:999px;border:1px solid rgba(120,170,255,.35);
 background:rgba(63,125,255,.14);font-size:12.5px;letter-spacing:1.6px;color:#cfe1ff;
}
.hero-copy h1{font-size:42px;line-height:1.24;margin-bottom:16px;letter-spacing:.4px;}
.hero-copy h1 .accent{
 background:linear-gradient(100deg,#7fb2ff,#39d8ff 55%,#a58bff);
 -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:16px;color:var(--text-mid);max-width:610px;margin-bottom:22px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag{
 display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:999px;
 font-size:13px;color:#c9dcff;background:rgba(19,32,58,.72);
 border:1px solid rgba(104,148,224,.28);transition:all var(--ease);
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(57,216,255,.9);}
.tag:hover{border-color:rgba(150,200,255,.6);color:#fff;transform:translateY(-2px);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-note{margin-top:18px;font-size:13px;color:var(--text-dim);}

/* live card */
.live-card{
 border-radius:var(--radius-lg);overflow:hidden;
 background:var(--panel);border:1px solid var(--line-strong);
 backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
 box-shadow:0 30px 70px -34px rgba(0,0,0,.98);
}
.live-cover{position:relative;}
.live-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.live-cover::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(180deg,rgba(3,8,18,.05),rgba(3,8,18,.78));
}
.live-badge{
 position:absolute;top:14px;left:14px;z-index:2;
 display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:999px;
 font-size:12px;font-weight:700;letter-spacing:1px;color:#fff;
 background:rgba(255,72,110,.9);box-shadow:0 8px 22px -10px rgba(255,72,110,.95);
}
.live-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#fff;animation:pulse 1.6s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.3;}}
.live-body{padding:20px 20px 22px;}
.live-body h2{font-size:18px;margin-bottom:6px;}
.live-body p.live-desc{font-size:13.5px;color:var(--text-mid);margin-bottom:16px;}
.countdown{display:flex;gap:9px;margin-bottom:16px;}
.cd-cell{
 flex:1;text-align:center;padding:9px 4px;border-radius:11px;
 background:rgba(9,18,36,.86);border:1px solid var(--line);
}
.cd-num{display:block;font-size:22px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;line-height:1.2;}
.cd-label{display:block;font-size:11px;letter-spacing:1.4px;color:var(--text-dim);margin-top:2px;}
.live-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;}
.live-foot small{color:var(--text-dim);font-size:12.5px;}

/* ============ Metrics ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.metric-card{
 padding:24px 20px;border-radius:var(--radius);
 background:var(--panel);border:1px solid var(--line);
 transition:all var(--ease);
}
.metric-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 22px 46px -26px rgba(63,125,255,.85);}
.metric-num{font-size:30px;font-weight:800;color:#fff;line-height:1.2;margin-bottom:6px;}
.metric-num span{font-size:15px;color:var(--cyan);margin-left:3px;font-weight:700;}
.metric-title{font-size:14.5px;font-weight:700;color:#dbe7ff;margin-bottom:6px;}
.metric-text{font-size:13px;color:var(--text-dim);margin:0;line-height:1.7;}

/* ============ Tiles (功能分组) ============ */
.tile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.tile{
 position:relative;padding:26px 22px;border-radius:var(--radius);
 background:linear-gradient(160deg,rgba(23,39,70,.68),rgba(12,21,40,.86));
 border:1px solid var(--line);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 overflow:hidden;
}
.tile::before{
 content:"";position:absolute;top:0;left:0;right:0;height:1px;
 background:linear-gradient(90deg,transparent,rgba(120,170,255,.7),transparent);
 opacity:0;transition:opacity var(--ease);
}
.tile:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 26px 54px -28px rgba(63,125,255,.9);}
.tile:hover::before{opacity:1;}
.tile-icon{
 width:42px;height:42px;border-radius:12px;margin-bottom:16px;
 display:flex;align-items:center;justify-content:center;
 background:rgba(63,125,255,.16);border:1px solid rgba(120,170,255,.35);color:#9cc6ff;
}
.tile-icon svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.tile h3{font-size:17px;margin-bottom:9px;}
.tile p{font-size:14px;color:var(--text-mid);margin-bottom:14px;}
.tile-tags{display:flex;flex-wrap:wrap;gap:7px;}
.chip{
 display:inline-block;padding:4px 10px;border-radius:7px;font-size:12px;
 color:#a9c7ff;background:rgba(63,125,255,.13);border:1px solid rgba(104,148,224,.24);
}

/* ============ Scenes ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.scene-card{
 display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;
 padding:24px;border-radius:var(--radius);
 background:rgba(11,20,38,.9);border:1px solid var(--line);
 transition:all var(--ease);
}
.scene-card:hover{transform:translateY(-3px);border-color:var(--line-strong);background:rgba(16,28,52,.95);box-shadow:0 22px 48px -28px rgba(57,216,255,.6);}
.scene-index{
 width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
 font-size:16px;font-weight:800;color:#0a1730;
 background:linear-gradient(140deg,#7fb2ff,#39d8ff);box-shadow:0 10px 24px -12px rgba(57,216,255,.9);
}
.scene-card h3{font-size:16.5px;margin-bottom:8px;}
.scene-card p{font-size:14px;color:var(--text-mid);margin:0 0 10px;}
.scene-meta{font-size:12.5px;color:var(--text-dim);}

/* ============ Demo ============ */
.demo-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:40px;align-items:center;}
.demo-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--shadow);}
.demo-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.demo-media figcaption{
 position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:13px;color:#dbe8ff;
 background:linear-gradient(180deg,transparent,rgba(3,8,18,.92));
}
.steps{display:flex;flex-direction:column;gap:16px;counter-reset:step;}
.step{
 position:relative;padding:18px 20px 18px 62px;border-radius:var(--radius-sm);
 background:rgba(13,24,44,.82);border:1px solid var(--line);
 transition:all var(--ease);
}
.step:hover{border-color:var(--line-strong);background:rgba(20,34,62,.92);transform:translateX(3px);}
.step::before{
 counter-increment:step;content:counter(step,decimal-leading-zero);
 position:absolute;left:18px;top:18px;
 font-size:13px;font-weight:800;color:#8fc0ff;
 width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;
 background:rgba(63,125,255,.16);border:1px solid rgba(120,170,255,.3);
}
.step h3{font-size:15.5px;margin-bottom:6px;}
.step p{font-size:13.5px;color:var(--text-mid);margin:0;}
.demo-result{
 margin-top:20px;padding:16px 20px;border-radius:var(--radius-sm);
 background:rgba(57,216,255,.09);border:1px dashed rgba(57,216,255,.4);
 font-size:14px;color:#cbe8ff;
}
.demo-result strong{color:#fff;}

/* ============ Cases ============ */
.case-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-item{
 padding:24px 22px;border-radius:var(--radius);
 background:rgba(10,19,36,.92);border:1px solid var(--line);
 border-left:3px solid rgba(129,97,255,.7);
 transition:all var(--ease);
}
.case-item:hover{transform:translateY(-4px);border-left-color:var(--cyan);box-shadow:0 24px 50px -28px rgba(129,97,255,.85);}
.case-item h3{font-size:16px;margin-bottom:10px;}
.case-item p{font-size:13.5px;color:var(--text-mid);margin-bottom:12px;}
.case-tag{font-size:12px;color:#9cc6ff;letter-spacing:1px;}

/* ============ Plans (强度对照) ============ */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch;}
.plan-card{
 display:flex;flex-direction:column;padding:28px 24px;border-radius:var(--radius-lg);
 background:linear-gradient(170deg,rgba(20,34,62,.85),rgba(9,17,32,.95));
 border:1px solid var(--line);transition:all var(--ease);
}
.plan-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 28px 58px -30px rgba(63,125,255,.9);}
.plan-card.featured{
 border-color:rgba(120,170,255,.6);
 box-shadow:0 0 0 1px rgba(120,170,255,.35),0 28px 60px -30px rgba(63,125,255,.95);
}
.plan-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px;}
.plan-head h3{font-size:18px;margin:0;}
.plan-badge{font-size:11.5px;padding:3px 10px;border-radius:999px;color:#0a1730;background:linear-gradient(120deg,#7fb2ff,#39d8ff);font-weight:800;letter-spacing:.6px;}
.plan-lead{font-size:13.5px;color:var(--text-dim);margin-bottom:18px;}
.plan-list{display:flex;flex-direction:column;gap:10px;margin-bottom:22px;flex:1;}
.plan-list li{position:relative;padding-left:22px;font-size:13.8px;color:var(--text-mid);}
.plan-list li::before{
 content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:2px;
 background:linear-gradient(135deg,var(--cyan),var(--blue));
}
.plan-foot{font-size:12.5px;color:var(--text-dim);border-top:1px solid var(--line);padding-top:14px;}

/* ============ Quotes ============ */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.quote-card{
 padding:26px 24px;border-radius:var(--radius);
 background:var(--panel);border:1px solid var(--line);
 position:relative;transition:all var(--ease);
}
.quote-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 50px -28px rgba(63,125,255,.85);}
.quote-card::before{
 content:"”";position:absolute;top:6px;right:18px;font-size:58px;line-height:1;
 color:rgba(120,170,255,.22);font-family:Georgia,serif;
}
.quote-text{font-size:14px;color:#d3e1fb;margin-bottom:16px;}
.quote-user{display:flex;align-items:center;gap:11px;}
.avatar{
 width:36px;height:36px;border-radius:50%;flex:0 0 auto;
 display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:#08101f;
 background:linear-gradient(140deg,#8fc0ff,#39d8ff);
}
.quote-user strong{display:block;font-size:13.5px;color:#fff;}
.quote-user em{font-style:normal;font-size:12px;color:var(--text-dim);}

/* ============ Posts ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.post-card{
 display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;
 background:rgba(10,19,36,.92);border:1px solid var(--line);
 transition:all var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 26px 52px -28px rgba(63,125,255,.9);}
.post-body{padding:22px 20px;display:flex;flex-direction:column;gap:9px;height:100%;}
.post-cat{
 align-self:flex-start;font-size:11.5px;letter-spacing:1px;padding:3px 10px;border-radius:7px;
 color:#9cc6ff;background:rgba(63,125,255,.14);border:1px solid rgba(104,148,224,.26);
}
.post-body h3{font-size:16px;margin:0;line-height:1.5;}
.post-body p{font-size:13.5px;color:var(--text-mid);margin:0;flex:1;}
.post-time{font-size:12px;color:var(--text-dim);}
.empty-note{
 padding:34px 24px;text-align:center;color:var(--text-dim);font-size:14px;
 border:1px dashed rgba(120,170,255,.35);border-radius:var(--radius);background:rgba(10,19,36,.7);
}

/* ============ CTA ============ */
.cta-panel{
 display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center;
 padding:44px 40px;border-radius:var(--radius-lg);
 background:
  radial-gradient(600px 300px at 8% 0%,rgba(63,125,255,.24),transparent 70%),
  linear-gradient(160deg,rgba(20,34,62,.94),rgba(8,15,30,.98));
 border:1px solid var(--line-strong);
 box-shadow:0 30px 70px -40px rgba(63,125,255,.9);
}
.cta-panel h2{font-size:27px;margin-bottom:12px;}
.cta-panel p{font-size:14.5px;color:var(--text-mid);}
.cta-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.form-grid{display:grid;gap:14px;}
.field label{display:block;font-size:12.5px;letter-spacing:1px;color:var(--text-dim);margin-bottom:6px;}
.field input,.field textarea{
 width:100%;padding:11px 14px;border-radius:10px;
 background:rgba(6,12,26,.9);border:1px solid var(--line);color:var(--text);
 transition:border-color var(--ease),box-shadow var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:rgba(123,143,181,.75);}
.field input:focus,.field textarea:focus{border-color:rgba(120,170,255,.75);box-shadow:0 0 0 3px rgba(63,125,255,.18);outline:none;}
.field textarea{resize:vertical;min-height:96px;}
.form-tip{font-size:12.5px;color:var(--text-dim);margin:4px 0 0;}
.form-msg{font-size:13px;color:var(--cyan);min-height:20px;margin:0;}

/* ============ Footer ============ */
.site-footer{
 background:var(--bg-deep);border-top:1px solid var(--line);padding:60px 0 0;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-desc{font-size:13.5px;color:var(--text-dim);max-width:420px;line-height:1.8;}
.footer-col h3{font-size:14px;letter-spacing:1.2px;color:#dbe7ff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--text-dim);transition:color var(--ease),transform var(--ease);display:inline-block;}
.footer-col a:hover{color:#fff;transform:translateX(3px);}
.footer-bottom{
 display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
 padding:20px 0 26px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-dim);
}
.footer-bottom a{color:var(--text-mid);}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1024px){
 .header-cta{display:none;}
 .nav-toggle{display:flex;margin-left:auto;}
 .main-nav{
  position:absolute;top:68px;left:0;right:0;margin:0;
  background:rgba(6,12,24,.98);border-bottom:1px solid var(--line);
  box-shadow:0 26px 48px -26px rgba(0,0,0,.95);
  padding:12px 18px 18px;display:none;
 }
 .main-nav.is-open{display:block;}
 .main-nav ul{flex-direction:column;align-items:stretch;gap:4px;}
 .main-nav > ul > li > a{padding:12px 14px;font-size:15px;}
 .nav-panel{position:static;transform:none;opacity:1;visibility:visible;display:none;min-width:0;box-shadow:none;background:rgba(19,32,58,.6);margin:4px 0 8px;}
 .has-panel:hover .nav-panel{transform:none;}
 .has-panel.is-open .nav-panel{display:block;}
 .hero-copy h1{font-size:34px;}
 .hero-grid{grid-template-columns:1fr;gap:38px;}
 .metric-grid{grid-template-columns:repeat(2,1fr);}
 .tile-grid{grid-template-columns:repeat(2,1fr);}
 .demo-grid{grid-template-columns:1fr;gap:28px;}
 .case-list,.plan-grid,.quote-grid,.post-grid{grid-template-columns:repeat(2,1fr);}
 .cta-panel{grid-template-columns:1fr;padding:34px 26px;gap:28px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
 .section{padding:60px 0;}
 .hero{padding:52px 0 60px;}
 .hero-copy h1{font-size:28px;}
 .hero-sub{font-size:15px;}
 .section-title{font-size:24px;}
 .scene-grid{grid-template-columns:1fr;}
 .case-list,.plan-grid,.quote-grid,.post-grid{grid-template-columns:1fr;}
 .metric-grid{grid-template-columns:repeat(2,1fr);gap:14px;}
 .metric-num{font-size:25px;}
 .footer-grid{grid-template-columns:1fr;gap:28px;}
 .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .brand-text strong{font-size:14px;}
 .brand-text em{font-size:10px;letter-spacing:1px;}
 .brand-mark{width:34px;height:34px;font-size:17px;}
 .hero-copy h1{font-size:24px;}
 .tile-grid{grid-template-columns:1fr;}
 .metric-grid{grid-template-columns:1fr;}
 .btn{width:100%;}
 .hero-actions{flex-direction:column;}
 .header-cta{display:none;}
 .countdown{gap:6px;}
 .cd-num{font-size:19px;}
 .plan-card{padding:22px 18px;}
 .tag{font-size:12px;padding:6px 12px;}
}

/* roulang page: category2 */
:root{
 --bg:#050a16;
 --bg-soft:#08101f;
 --bg-deep:#03060f;
 --panel:rgba(19,32,58,.62);
 --panel-strong:rgba(23,39,70,.9);
 --line:rgba(104,148,224,.16);
 --line-strong:rgba(120,170,255,.42);
 --text:#e9f0ff;
 --text-mid:#a9bcdd;
 --text-dim:#7b8fb5;
 --blue:#3f7dff;
 --cyan:#39d8ff;
 --violet:#8161ff;
 --radius:14px;
 --radius-sm:10px;
 --radius-lg:20px;
 --shadow:0 18px 44px -24px rgba(0,0,0,.95);
 --glow:0 0 0 1px rgba(90,150,255,.42), 0 16px 38px -14px rgba(63,125,255,.8);
 --container:1180px;
 --ease:.22s cubic-bezier(.4,.7,.3,1);
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.78;
 color:var(--text);
 background:var(--bg);
 background-image:
 radial-gradient(1100px 520px at 12% -8%, rgba(63,125,255,.20), transparent 62%),
 radial-gradient(900px 460px at 88% 6%, rgba(129,97,255,.16), transparent 66%);
 background-attachment:fixed;
 -webkit-font-smoothing:antialiased;
}
*{box-sizing:border-box;}
img{max-width:100%;display:block;border-style:none;height:auto;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
p{margin:0 0 14px;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:.3px;line-height:1.32;color:#fff;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:1rem;color:inherit;}
button{cursor:pointer;background:none;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
::selection{background:rgba(63,125,255,.45);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

/* ============ Header / Nav ============ */
.site-header{
 position:sticky;top:0;z-index:120;
 height:68px;
 background:rgba(5,10,22,.82);
 backdrop-filter:blur(18px);
 -webkit-backdrop-filter:blur(18px);
 border-bottom:1px solid var(--line);
 transition:box-shadow var(--ease), background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(0,0,0,.95);background:rgba(4,8,18,.94);}
.header-inner{height:68px;display:flex;align-items:center;gap:24px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
 width:38px;height:38px;border-radius:11px;flex:0 0 auto;
 display:flex;align-items:center;justify-content:center;
 font-size:19px;font-weight:800;color:#fff;
 background:linear-gradient(140deg,var(--blue),var(--violet));
 box-shadow:0 0 0 1px rgba(140,180,255,.45),0 10px 24px -12px rgba(63,125,255,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.4px;color:#fff;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-dim);letter-spacing:1.4px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
 display:flex;align-items:center;gap:6px;
 padding:9px 14px;border-radius:9px;
 font-size:14.5px;color:var(--text-mid);font-weight:500;
 transition:color var(--ease),background var(--ease);
}
.main-nav > ul > li > a:hover{color:#fff;background:rgba(96,150,255,.12);}
.main-nav > ul > li > a.active{color:#fff;background:rgba(63,125,255,.18);box-shadow:inset 0 0 0 1px rgba(120,170,255,.35);}
.caret{
 display:inline-block;width:6px;height:6px;margin-left:2px;
 border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
 transform:rotate(45deg) translateY(-2px);opacity:.7;
}
.nav-panel{
 position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,-8px);
 min-width:196px;padding:10px;border-radius:14px;
 background:var(--panel-strong);
 border:1px solid var(--line-strong);
 box-shadow:0 26px 52px -26px rgba(0,0,0,.95);
 backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
 opacity:0;visibility:hidden;transition:all var(--ease);
}
.has-panel:hover .nav-panel,.has-panel:focus-within .nav-panel{opacity:1;visibility:visible;transform:translate(-50%,0);}
.nav-panel a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-mid);}
.nav-panel a:hover{background:rgba(96,150,255,.16);color:#fff;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;
 background:rgba(96,150,255,.12);border:1px solid var(--line);
 align-items:center;justify-content:center;margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dce8ff;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
 content:"";position:absolute;left:0;width:18px;height:2px;background:#dce8ff;border-radius:2px;transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

/* ============ Buttons ============ */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:11px 22px;border-radius:9px;border:1px solid transparent;
 font-size:14.5px;font-weight:600;letter-spacing:.3px;line-height:1.4;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{
 color:#fff;
 background:linear-gradient(135deg,#3f7dff,#6f5bff 55%,#39d8ff 130%);
 box-shadow:var(--glow);
}
.btn-primary:hover,.btn-primary:focus{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(140,190,255,.6),0 20px 42px -14px rgba(63,125,255,1);color:#fff;}
.btn-ghost{color:#d6e4ff;background:rgba(96,150,255,.08);border-color:rgba(120,170,255,.34);}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(96,150,255,.18);border-color:rgba(150,200,255,.62);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn-sm{padding:8px 16px;font-size:13.5px;}

/* ============ Section base ============ */
.section{padding:78px 0;position:relative;}
.section--soft{
 background:linear-gradient(180deg,rgba(9,17,34,.92),rgba(6,12,26,.96));
 border-top:1px solid rgba(104,148,224,.1);
 border-bottom:1px solid rgba(104,148,224,.1);
}
.section--deep{background:var(--bg-deep);border-top:1px solid rgba(104,148,224,.1);}
.section-head{max-width:780px;margin-bottom:36px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;letter-spacing:2px;font-weight:600;
 color:var(--cyan);margin-bottom:12px;
}
.section-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head h2{font-size:29px;margin-bottom:12px;}
.section-head p{color:var(--text-mid);font-size:15px;margin:0;max-width:720px;}
.section-head.center p{margin-left:auto;margin-right:auto;}

/* ============ Glass ============ */
.glass{
 background:var(--panel);
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow);
 backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 padding:5px 12px;border-radius:999px;
 font-size:12.5px;color:#cfe2ff;
 background:rgba(63,125,255,.14);
 border:1px solid rgba(120,170,255,.3);
}
.tag-row{display:flex;flex-wrap:wrap;gap:9px;}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:62px 0 70px;}
.hero::before{
 content:"";position:absolute;inset:0;
 background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
 opacity:.20;
 -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.2) 85%);
 mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.2) 85%);
}
.hero::after{
 content:"";position:absolute;inset:0;
 background:radial-gradient(720px 340px at 18% 12%, rgba(57,216,255,.14), transparent 70%);
 pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.42fr) minmax(0,1fr);gap:24px;align-items:start;}
.hero-main{padding:40px 38px;}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:1.6px;
 color:#bfe6ff;background:rgba(57,216,255,.10);border:1px solid rgba(57,216,255,.34);
 margin-bottom:20px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);}
.hero h1{font-size:40px;line-height:1.26;margin-bottom:16px;}
.hero h1 span{
 background:linear-gradient(120deg,#7fb0ff,#39d8ff 55%,#a58bff);
 -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{color:var(--text-mid);font-size:15.5px;max-width:600px;margin-bottom:22px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.hero-side{display:grid;gap:18px;}
.side-card{padding:24px 22px;}
.side-card h3{font-size:15px;margin-bottom:6px;}
.side-card .muted{font-size:12.5px;color:var(--text-dim);margin-bottom:18px;}
.bar-row{margin-bottom:14px;}
.bar-row:last-child{margin-bottom:0;}
.bar-label{display:flex;justify-content:space-between;font-size:13px;color:var(--text-mid);margin-bottom:7px;}
.bar-label b{color:#eaf3ff;font-weight:700;}
.bar-track{height:7px;border-radius:99px;background:rgba(120,170,255,.14);overflow:hidden;}
.bar-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--cyan));box-shadow:0 0 16px rgba(57,216,255,.45);}
.side-figure{padding:0;overflow:hidden;}
.side-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-lg) var(--radius-lg) 0 0;}
.side-figure figcaption{padding:16px 20px 18px;font-size:13px;color:var(--text-mid);}
.side-figure figcaption b{color:#fff;font-weight:700;display:block;margin-bottom:4px;font-size:14px;}
.side-offset{margin-left:26px;}

/* ============ Grid utilities ============ */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}

/* ============ Feature cards ============ */
.feature-card{
 padding:24px 22px;border-radius:var(--radius);
 background:var(--panel);
 border:1px solid var(--line);
 box-shadow:var(--shadow);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.feature-card:hover{
 transform:translateY(-4px);
 border-color:var(--line-strong);
 box-shadow:0 24px 48px -26px rgba(0,0,0,1),0 0 0 1px rgba(120,170,255,.22);
 background:rgba(24,40,72,.72);
}
.card-icon{
 width:40px;height:40px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
 color:var(--cyan);background:rgba(57,216,255,.10);border:1px solid rgba(57,216,255,.28);
 margin-bottom:14px;
}
.card-icon svg{width:20px;height:20px;}
.feature-card h3{font-size:17px;margin-bottom:8px;}
.feature-card p{font-size:14px;color:var(--text-mid);margin-bottom:14px;line-height:1.8;}
.feature-card .tag{font-size:11.5px;padding:4px 10px;}

/* ============ Specs table ============ */
.spec-wrap{padding:8px 0;overflow:hidden;}
.spec-row{
 display:grid;grid-template-columns:1.1fr .7fr .9fr 1.7fr;
 gap:12px;align-items:center;
 padding:16px 24px;
 border-top:1px solid rgba(104,148,224,.12);
 font-size:14px;
 transition:background var(--ease);
}
.spec-row.head{
 border-top:0;background:rgba(63,125,255,.10);
 font-size:12.5px;letter-spacing:1.4px;color:var(--cyan);font-weight:700;
}
.spec-row:hover:not(.head){background:rgba(96,150,255,.08);}
.spec-row b{color:#fff;font-weight:700;}
.spec-row span{color:var(--text-mid);}
.spec-row .num{color:#bfe6ff;font-weight:700;}
.spec-note{margin-top:16px;font-size:13px;color:var(--text-dim);padding:0 24px 18px;}

/* ============ Demo / split ============ */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:26px;align-items:center;}
.split-figure{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);}
.split-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.split-body h2{font-size:27px;margin-bottom:14px;}
.split-body p{color:var(--text-mid);font-size:15px;}
.step-list{margin-top:22px;display:grid;gap:14px;}
.step-item{display:flex;gap:14px;align-items:flex-start;}
.step-num{
 flex:0 0 auto;width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;
 font-size:13px;font-weight:800;color:#cfe4ff;
 background:rgba(63,125,255,.16);border:1px solid rgba(120,170,255,.34);
}
.step-item h4{font-size:14.5px;margin-bottom:4px;}
.step-item p{font-size:13.5px;color:var(--text-dim);margin:0;}

/* ============ Scenes ============ */
.scene-card{
 padding:24px 22px;border-radius:var(--radius);
 background:linear-gradient(160deg,rgba(23,39,70,.72),rgba(12,22,44,.72));
 border:1px solid var(--line);
 transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 22px 44px -26px rgba(0,0,0,1);}
.scene-card h3{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:9px;}
.scene-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);}
.scene-card p{font-size:14px;color:var(--text-mid);margin:0;}

/* ============ Timeline ============ */
.timeline{position:relative;padding-left:26px;display:grid;gap:20px;}
.timeline::before{
 content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
 background:linear-gradient(180deg,rgba(57,216,255,.7),rgba(129,97,255,.15));
}
.tl-item{position:relative;}
.tl-item::before{
 content:"";position:absolute;left:-26px;top:7px;width:12px;height:12px;border-radius:50%;
 background:#0a1428;border:2px solid var(--cyan);box-shadow:0 0 12px rgba(57,216,255,.7);
}
.tl-date{font-size:12.5px;letter-spacing:1.2px;color:var(--cyan);font-weight:700;margin-bottom:4px;}
.tl-item h4{font-size:15px;margin-bottom:4px;}
.tl-item p{font-size:13.5px;color:var(--text-dim);margin:0;}

/* ============ Topics ============ */
.topic-card{
 display:flex;flex-direction:column;gap:10px;
 padding:26px 24px;border-radius:var(--radius);
 background:var(--panel);border:1px solid var(--line);
 transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.topic-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 46px -26px rgba(0,0,0,1);background:rgba(24,40,72,.78);}
.topic-card .topic-idx{font-size:12.5px;letter-spacing:2px;color:var(--text-dim);font-weight:700;}
.topic-card h3{font-size:18px;}
.topic-card p{font-size:14px;color:var(--text-mid);margin:0;}
.topic-card .topic-link{
 margin-top:6px;font-size:13.5px;font-weight:700;color:var(--cyan);
 display:inline-flex;align-items:center;gap:6px;
}
.topic-card.is-current{border-color:rgba(57,216,255,.5);box-shadow:0 0 0 1px rgba(57,216,255,.28),0 22px 44px -26px rgba(0,0,0,1);}
.topic-card.is-current .topic-idx{color:var(--cyan);}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;}
.faq-item{
 background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
 padding:0 22px;transition:border-color var(--ease),background var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);background:rgba(24,40,72,.7);}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 0;
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 font-size:15.5px;font-weight:700;color:#fff;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";font-size:19px;font-weight:600;color:var(--cyan);
 transition:transform var(--ease);line-height:1;
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg);}
.faq-item .faq-answer{padding:0 0 20px;font-size:14px;color:var(--text-mid);border-top:1px solid rgba(104,148,224,.14);padding-top:14px;}

/* ============ Feedback ============ */
.feedback-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:center;}
.feedback-info h2{font-size:28px;margin-bottom:14px;}
.feedback-info p{color:var(--text-mid);font-size:15px;}
.feedback-points{display:grid;gap:12px;margin-top:20px;}
.feedback-points li{display:flex;gap:10px;font-size:14px;color:var(--text-mid);align-items:flex-start;}
.feedback-points li::before{
 content:"";flex:0 0 auto;width:8px;height:8px;margin-top:8px;border-radius:2px;
 background:linear-gradient(135deg,var(--cyan),var(--blue));
}
.feedback-form{
 padding:28px 26px;border-radius:var(--radius-lg);
 background:var(--panel-strong);border:1px solid var(--line-strong);
 box-shadow:var(--shadow);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--text-mid);margin-bottom:7px;letter-spacing:.4px;}
.field input[type="text"],.field input[type="tel"],.field textarea{
 width:100%;padding:11px 14px;border-radius:10px;
 background:rgba(6,12,26,.86);
 border:1px solid rgba(104,148,224,.28);
 color:#eaf3ff;font-size:14px;line-height:1.6;
 transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
 box-shadow:none;
}
.field input:focus,.field textarea:focus{
 outline:none;border-color:rgba(57,216,255,.72);background:rgba(8,18,38,.96);
 box-shadow:0 0 0 3px rgba(57,216,255,.16);
}
.field textarea{min-height:104px;resize:vertical;}
.form-hint{font-size:12.5px;color:var(--text-dim);margin-top:10px;line-height:1.7;}

/* ============ Footer ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:62px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:42px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-desc{color:var(--text-dim);font-size:14px;line-height:1.85;max-width:430px;margin:0;}
.footer-col h3{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.8px;}
.footer-col ul{display:grid;gap:10px;list-style:none;margin:0;padding:0;}
.footer-col a{color:var(--text-mid);font-size:14px;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
 margin-top:42px;padding-top:20px;border-top:1px solid var(--line);
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:13px;color:var(--text-dim);
}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1080px){
 .hero-grid{grid-template-columns:1fr;}
 .hero h1{font-size:34px;}
 .side-offset{margin-left:0;}
 .hero-side{grid-template-columns:repeat(2,minmax(0,1fr));}
 .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
 .split{grid-template-columns:1fr;}
 .feedback-wrap{grid-template-columns:1fr;}
 .spec-row{grid-template-columns:1fr .8fr .8fr;font-size:13.5px;}
 .spec-row .col-note{display:none;}
}
@media (max-width:920px){
 .header-cta{display:none;}
 .nav-toggle{display:inline-flex;}
 .main-nav{
   position:absolute;left:0;right:0;top:68px;
   display:none;
   background:rgba(5,10,22,.98);
   border-bottom:1px solid var(--line-strong);
   box-shadow:0 28px 50px -30px rgba(0,0,0,1);
   padding:14px 22px 20px;
   backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
 }
 .main-nav.is-open{display:block;}
 .main-nav ul{flex-direction:column;align-items:stretch;gap:2px;}
 .main-nav > ul > li > a{justify-content:space-between;padding:12px 12px;font-size:15px;min-height:44px;}
 .nav-panel{
   position:static;transform:none;opacity:1;visibility:visible;
   background:transparent;border:0;box-shadow:none;padding:2px 0 8px 14px;
   backdrop-filter:none;-webkit-backdrop-filter:none;
 }
 .has-panel:hover .nav-panel{transform:none;}
 .nav-panel a{padding:10px 12px;min-height:40px;display:flex;align-items:center;}
}
@media (max-width:768px){
 .section{padding:58px 0;}
 .hero{padding:44px 0 54px;}
 .hero-main{padding:28px 22px;}
 .hero h1{font-size:28px;}
 .hero-lead{font-size:14.5px;}
 .section-head h2{font-size:24px;}
 .grid-3,.grid-2{grid-template-columns:1fr;}
 .hero-side{grid-template-columns:1fr;}
 .footer-grid{grid-template-columns:1fr;gap:30px;}
 .spec-row{grid-template-columns:1.1fr .9fr;padding:14px 18px;gap:8px;}
 .spec-row .col-cap,.spec-row .col-note{display:none;}
 .split-body h2{font-size:23px;}
 .feedback-info h2{font-size:23px;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .header-inner{gap:12px;}
 .brand-text strong{font-size:14px;}
 .brand-text em{font-size:10px;letter-spacing:1px;}
 .brand-mark{width:34px;height:34px;font-size:17px;border-radius:10px;}
 .hero h1{font-size:24px;}
 .grid-4{grid-template-columns:1fr;}
 .btn{width:100%;}
 .hero-actions{gap:10px;}
 .feedback-form{padding:22px 18px;}
 .spec-row{padding:13px 16px;font-size:13px;}
 .faq-item{padding:0 16px;}
 .faq-item summary{font-size:14.5px;}
 .footer-bottom{flex-direction:column;gap:6px;}
}