:root{--brand:#6d4aff;--brand2:#8f7bff;--green:#44d49c;--dark:#120d28;--dark2:#1a1433;--ink:#20233f;--muted:#5c607a;--line:#e8e9f3;--bg:#f7f7fc;--card:#fff;--grad:linear-gradient(135deg,#6d4aff,#44d49c);--grad-btn:linear-gradient(135deg,#6d4aff 0%,#9b6dff 60%,#44d49c 130%);--shadow:0 10px 30px rgba(109,74,255,.12);--radius:16px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section{position:relative}
.sec{padding:72px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 46px}
.sec-head .kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--brand);background:rgba(109,74,255,.08);border:1px solid rgba(109,74,255,.18);padding:5px 16px;border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:34px;line-height:1.3;color:var(--dark)}
.sec-head p{color:var(--muted);margin-top:12px;font-size:16px}
h1,h2,h3,h4{line-height:1.35}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:700;transition:all .25s ease;cursor:pointer;border:none;white-space:nowrap}
.btn-primary{background:var(--grad-btn);color:#fff;box-shadow:0 8px 22px rgba(109,74,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(109,74,255,.45)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}
.btn-outline{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-outline:hover{background:rgba(109,74,255,.06)}
.btn-green{background:linear-gradient(135deg,#2fe6a7,#19b98a);color:#04301f;box-shadow:0 8px 20px rgba(68,212,156,.35)}
.btn-green:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(68,212,156,.5)}
/* ===== header ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:0;transition:background .3s ease,box-shadow .3s ease}
.header.scrolled{background:rgba(18,13,40,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 4px 24px rgba(0,0,0,.25)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff;letter-spacing:.5px}
.brand img{height:38px;width:auto}
.brand b{color:#fff}
.nav{display:flex;align-items:center;gap:4px}
.nav>li{position:relative}
.nav>li>a{display:flex;align-items:center;gap:6px;color:rgba(255,255,255,.88);font-size:15px;font-weight:600;padding:10px 14px;border-radius:10px;transition:color .2s}
.nav>li>a:hover{color:#44d49c}
.nav>li>a .caret{display:inline-block;transition:transform .3s ease;font-size:11px}
.nav>li:hover>a .caret,.nav>li.open>a .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);min-width:220px;background:#fff;border-radius:14px;box-shadow:0 16px 40px rgba(18,13,40,.18);padding:8px;opacity:0;visibility:hidden;transition:all .25s ease;z-index:100}
.nav>li:hover>.dropdown,.nav>li.open>.dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:10px 14px;border-radius:10px;color:var(--ink);font-size:14px;font-weight:500;transition:all .18s}
.dropdown a:hover{background:rgba(109,74,255,.08);color:var(--brand);padding-left:18px}
.header-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.burger span{width:24px;height:2.5px;background:#fff;border-radius:2px;transition:all .3s}
.burger.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
/* ===== hero ===== */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(109,74,255,.45),transparent 60%),radial-gradient(900px 500px at 10% 110%,rgba(68,212,156,.25),transparent 55%),linear-gradient(160deg,#0d0920,#1a1433 55%,#120d28);color:#fff;padding:150px 0 90px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(68,212,156,.12);border:1px solid rgba(68,212,156,.35);color:#5ee6b4;font-size:13px;font-weight:700;padding:6px 16px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:46px;font-weight:800;line-height:1.22;margin-bottom:18px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:rgba(255,255,255,.78);max-width:520px;margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stats .stat b{display:block;font-size:28px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .stat span{font-size:13px;color:rgba(255,255,255,.65)}
/* ===== demo ===== */
.demo{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:22px;padding:22px;backdrop-filter:blur(10px);box-shadow:0 24px 60px rgba(0,0,0,.35);position:relative}
.demo::before{content:"";position:absolute;inset:-1px;border-radius:22px;padding:1px;background:linear-gradient(135deg,rgba(109,74,255,.6),rgba(68,212,156,.5));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.demo-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.demo-bar .dotwrap{display:flex;gap:6px}
.demo-bar .dotwrap i{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.25)}
.demo-bar .dotwrap i:nth-child(1){background:#ff6b6b}
.demo-bar .dotwrap i:nth-child(2){background:#ffd166}
.demo-bar .dotwrap i:nth-child(3){background:#44d49c}
.demo-status{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:rgba(255,255,255,.75)}
.demo-status .led{width:9px;height:9px;border-radius:50%;background:#ff6b6b;box-shadow:0 0 8px #ff6b6b}
.demo-status.on .led{background:#44d49c;box-shadow:0 0 10px #44d49c}
.demo-body{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.demo-left{background:rgba(13,9,32,.55);border-radius:16px;padding:18px}
.demo-node-label{font-size:12px;color:rgba(255,255,255,.6);margin-bottom:8px;letter-spacing:1px}
.demo-node{display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:10px 14px;cursor:pointer;transition:all .2s;margin-bottom:8px;font-size:14px}
.demo-node:hover{border-color:rgba(68,212,156,.5)}
.demo-node.active{border-color:#44d49c;background:rgba(68,212,156,.12);color:#5ee6b4;font-weight:700}
.demo-node .ping{font-size:12px;color:rgba(255,255,255,.55)}
.demo-right{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:rgba(13,9,32,.55);border-radius:16px;padding:18px}
.gauge{position:relative;width:170px;height:170px}
.gauge svg{width:100%;height:100%;transform:rotate(-90deg)}
.gauge .track{fill:none;stroke:rgba(255,255,255,.1);stroke-width:12}
.gauge .bar{fill:none;stroke:url(#gGrad);stroke-width:12;stroke-linecap:round;stroke-dasharray:408.4;stroke-dashoffset:408.4;transition:stroke-dashoffset 1.6s cubic-bezier(.4,0,.2,1)}
.gauge .num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge .num b{font-size:30px;font-weight:800}
.gauge .num span{font-size:11px;color:rgba(255,255,255,.6)}
.demo-metrics{display:flex;gap:12px;width:100%}
.demo-metric{flex:1;background:rgba(255,255,255,.06);border-radius:12px;padding:10px;text-align:center}
.demo-metric b{display:block;font-size:18px;font-weight:800;color:#5ee6b4}
.demo-metric span{font-size:11px;color:rgba(255,255,255,.6)}
.demo-connect{width:100%;border:none;border-radius:14px;padding:14px;font-size:16px;font-weight:800;cursor:pointer;background:linear-gradient(135deg,#2fe6a7,#19b98a);color:#04301f;transition:all .25s}
.demo-connect:hover{filter:brightness(1.08);transform:translateY(-1px)}
.demo-connect.connected{background:linear-gradient(135deg,#ff8f8f,#ff5f5f);color:#fff}
.demo-toggles{display:flex;gap:10px;width:100%;flex-wrap:wrap}
.demo-toggle{flex:1;min-width:100px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:9px 6px;font-size:12.5px;color:rgba(255,255,255,.8);cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:6px}
.demo-toggle.on{border-color:#44d49c;color:#5ee6b4;background:rgba(68,212,156,.1)}
.demo-toggle .sw{width:26px;height:15px;border-radius:999px;background:rgba(255,255,255,.25);position:relative;transition:background .2s;flex-shrink:0}
.demo-toggle .sw::after{content:"";position:absolute;top:2px;left:2px;width:11px;height:11px;border-radius:50%;background:#fff;transition:left .2s}
.demo-toggle.on .sw{background:#44d49c}
.demo-toggle.on .sw::after{left:13px}
/* ===== nodes strip ===== */
.nodes-strip{background:var(--dark);padding:26px 0;overflow:hidden}
.nodes-track{display:flex;gap:14px;animation:scrollx 30s linear infinite;width:max-content}
.nodes-track:hover{animation-play-state:paused}
@keyframes scrollx{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.node-chip{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:999px;padding:8px 18px;font-size:13.5px;color:rgba(255,255,255,.85);white-space:nowrap}
.node-chip i{width:8px;height:8px;border-radius:50%;background:#44d49c;box-shadow:0 0 6px #44d49c}
/* ===== speed data ===== */
.speed-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:20px}
.speed-card{background:var(--card);border-radius:var(--radius);padding:26px 22px;text-align:center;box-shadow:var(--shadow);transition:transform .25s}
.speed-card:hover{transform:translateY(-6px)}
.speed-card b{display:block;font-size:30px;font-weight:800;color:var(--brand);margin-bottom:6px}
.speed-card p{font-size:13.5px;color:var(--muted)}
/* ===== features ===== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat-card{background:var(--card);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:all .3s;position:relative;overflow:hidden;border:1px solid transparent}
.feat-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .35s}
.feat-card:hover{transform:translateY(-8px);border-color:rgba(109,74,255,.2);box-shadow:0 18px 40px rgba(109,74,255,.18)}
.feat-card:hover::before{transform:scaleX(1)}
.feat-icon{width:56px;height:56px;border-radius:16px;background:rgba(109,74,255,.1);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.feat-card h3{font-size:18px;margin-bottom:8px;color:var(--dark)}
.feat-card p{font-size:14px;color:var(--muted)}
/* ===== protocol tech ===== */
.protocol{background:var(--dark);color:#fff}
.protocol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.protocol-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:30px 26px;transition:all .3s}
.protocol-card:hover{background:rgba(109,74,255,.12);border-color:rgba(109,74,255,.5);transform:translateY(-6px)}
.protocol-card .pi{font-size:30px;margin-bottom:14px}
.protocol-card h3{font-size:19px;margin-bottom:10px}
.protocol-card p{font-size:14px;color:rgba(255,255,255,.7)}
.protocol-card .tagline{display:inline-block;margin-top:14px;font-size:12.5px;color:#5ee6b4;border:1px solid rgba(68,212,156,.4);border-radius:999px;padding:4px 12px}
/* ===== scenarios ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{background:var(--card);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);transition:all .3s;position:relative}
.scene-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(109,74,255,.2)}
.scene-num{position:absolute;top:20px;right:22px;font-size:40px;font-weight:800;color:rgba(109,74,255,.12)}
.scene-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(109,74,255,.12),rgba(68,212,156,.14));display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:14px}
.scene-card h3{font-size:18px;margin-bottom:8px;color:var(--dark)}
.scene-card p{font-size:14px;color:var(--muted)}
/* ===== steps ===== */
.steps{background:linear-gradient(160deg,#efeaff,#e6fbf3)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step-card{background:var(--card);border-radius:var(--radius);padding:32px 26px;position:relative;box-shadow:var(--shadow);counter-increment:step}
.step-card::before{content:counter(step,decimal-leading-zero);position:absolute;top:-22px;left:24px;width:52px;height:52px;border-radius:16px;background:var(--grad);color:#fff;font-weight:800;font-size:20px;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 22px rgba(109,74,255,.4)}
.step-card h3{font-size:18px;margin:18px 0 8px;color:var(--dark)}
.step-card p{font-size:14px;color:var(--muted)}
/* ===== pricing ===== */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{background:var(--card);border-radius:20px;padding:34px 28px;box-shadow:var(--shadow);position:relative;display:flex;flex-direction:column;border:1.5px solid var(--line);transition:all .3s}
.price-card:hover{transform:translateY(-6px)}
.price-card.hot{background:linear-gradient(165deg,#1a1433,#2a2154);color:#fff;border:none;transform:scale(1.04);box-shadow:0 26px 60px rgba(109,74,255,.35);z-index:2}
.price-card.hot:hover{transform:scale(1.04) translateY(-6px)}
.hot-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12.5px;font-weight:800;padding:5px 18px;border-radius:999px;letter-spacing:1px;box-shadow:0 8px 18px rgba(68,212,156,.4);white-space:nowrap}
.price-card h3{font-size:19px;margin-bottom:4px}
.price-card .pc-desc{font-size:13px;color:var(--muted);margin-bottom:20px}
.price-card.hot .pc-desc{color:rgba(255,255,255,.65)}
.price{display:flex;align-items:baseline;gap:6px;margin-bottom:22px}
.price b{font-size:42px;font-weight:800;line-height:1}
.price-card.hot .price b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.price span{font-size:14px;color:var(--muted)}
.price-card.hot .price span{color:rgba(255,255,255,.6)}
.price-list{flex:1;margin-bottom:26px}
.price-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;padding:7px 0;color:var(--ink)}
.price-card.hot .price-list li{color:rgba(255,255,255,.9)}
.price-list li::before{content:"✓";flex-shrink:0;width:20px;height:20px;border-radius:50%;background:rgba(68,212,156,.18);color:#19b98a;font-weight:800;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:2px}
/* ===== faq ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border-radius:14px;margin-bottom:14px;box-shadow:0 4px 16px rgba(18,13,40,.06);overflow:hidden;border:1px solid var(--line)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;cursor:pointer;font-weight:700;font-size:16px;color:var(--dark);transition:color .2s}
.faq-q:hover{color:var(--brand)}
.faq-q .arr{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:rgba(109,74,255,.1);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--brand);transition:transform .3s}
.faq-item.open .faq-q .arr{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--muted);font-size:14.5px}
.faq-a-inner ol{padding-left:20px;margin-top:8px}
.faq-a-inner li{margin-bottom:4px}
/* ===== testimonials ===== */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.testi-card{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;transition:transform .3s}
.testi-card:hover{transform:translateY(-6px)}
.testi-stars{color:#ffb020;font-size:14px;letter-spacing:2px}
.testi-card p{font-size:14.5px;color:var(--ink);flex:1}
.testi-user{display:flex;align-items:center;gap:12px}
.testi-ava{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px}
.testi-user b{display:block;font-size:14px}
.testi-user span{font-size:12.5px;color:var(--muted)}
/* ===== news cards ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(109,74,255,.2)}
.news-card .nc-img{position:relative;aspect-ratio:16/9;overflow:hidden}
.news-card .nc-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-card:hover .nc-img img{transform:scale(1.07)}
.nc-tag{position:absolute;top:12px;left:12px;background:rgba(18,13,40,.75);backdrop-filter:blur(4px);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px}
.nc-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.nc-body h3{font-size:16.5px;line-height:1.5;color:var(--dark);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.news-card:hover .nc-body h3{color:var(--brand)}
.nc-meta{font-size:12.5px;color:var(--muted);margin-top:auto;display:flex;gap:12px}
/* ===== cta / footer ===== */
.cta{background:radial-gradient(800px 400px at 50% 0%,rgba(109,74,255,.4),transparent),linear-gradient(160deg,#0d0920,#1a1433);color:#fff;text-align:center;padding:80px 0;border-radius:0}
.cta h2{font-size:34px;font-weight:800;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.75);max-width:560px;margin:0 auto 30px}
.footer{background:var(--dark);color:rgba(255,255,255,.72);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand p{font-size:13.5px;margin-top:14px;max-width:260px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer-col a{display:block;font-size:13.5px;padding:6px 0;transition:color .2s}
.footer-col a:hover{color:#44d49c}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:12.5px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
/* ===== page hero (subpages) ===== */
.page-hero{background:radial-gradient(900px 400px at 80% -20%,rgba(109,74,255,.4),transparent),linear-gradient(160deg,#0d0920,#1a1433);color:#fff;padding:150px 0 70px;text-align:center}
.page-hero h1{font-size:38px;font-weight:800;margin-bottom:14px}
.page-hero p{color:rgba(255,255,255,.75);max-width:640px;margin:0 auto}
.crumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px;color:rgba(255,255,255,.55);margin-bottom:18px}
.crumb a:hover{color:#44d49c}
.crumb .sep{opacity:.5}
/* ===== download page ===== */
.dl-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;text-align:left}
.dl-hero-grid .page-hero-p{max-width:100%}
.dl-meta{display:flex;gap:26px;flex-wrap:wrap;margin:20px 0 28px}
.dl-meta .dm{text-align:left}
.dl-meta .dm b{display:block;font-size:20px;font-weight:800;color:#5ee6b4}
.dl-meta .dm span{font-size:12.5px;color:rgba(255,255,255,.6)}
.ver-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ver-card{background:var(--card);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);display:flex;flex-direction:column;border:1.5px solid var(--line);transition:all .3s}
.ver-card:hover{transform:translateY(-6px);border-color:rgba(109,74,255,.4)}
.ver-card.hot{border-color:transparent;background:linear-gradient(165deg,#1a1433,#2a2154);color:#fff}
.ver-card .vname{font-size:19px;font-weight:800;margin-bottom:2px}
.ver-card .vver{font-size:13px;color:var(--muted);margin-bottom:14px}
.ver-card.hot .vver{color:rgba(255,255,255,.6)}
.ver-card .vsize{display:inline-block;font-size:13px;background:rgba(109,74,255,.1);color:var(--brand);border-radius:8px;padding:4px 12px;margin-bottom:14px}
.ver-card.hot .vsize{background:rgba(68,212,156,.15);color:#5ee6b4}
.ver-card ul{margin-bottom:20px;flex:1}
.ver-card li{font-size:13.5px;padding:5px 0;color:var(--ink)}
.ver-card.hot li{color:rgba(255,255,255,.85)}
.ver-card li::before{content:"✓";color:#19b98a;font-weight:800;margin-right:8px}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.req-card{background:var(--card);border-radius:14px;padding:22px;box-shadow:0 4px 16px rgba(18,13,40,.06);border:1px solid var(--line);display:flex;gap:14px;align-items:flex-start}
.req-card .ri{width:44px;height:44px;flex-shrink:0;border-radius:12px;background:rgba(109,74,255,.1);display:flex;align-items:center;justify-content:center;font-size:20px}
.req-card b{display:block;font-size:14.5px;margin-bottom:3px}
.req-card p{font-size:13px;color:var(--muted)}
/* ===== news list page ===== */
.news-page-grid{display:grid;grid-template-columns:1fr;gap:24px}
.news-row{display:flex;gap:22px;background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:all .3s;align-items:center}
.news-row:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(109,74,255,.18)}
.news-row .nr-img{width:280px;aspect-ratio:16/9;border-radius:12px;overflow:hidden;flex-shrink:0}
.news-row .nr-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-row:hover .nr-img img{transform:scale(1.06)}
.nr-body{flex:1}
.nr-body h2{font-size:19px;margin-bottom:8px;color:var(--dark);transition:color .2s}
.news-row:hover .nr-body h2{color:var(--brand)}
.nr-body p{font-size:14px;color:var(--muted);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nr-meta{font-size:12.5px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}
/* ===== article page ===== */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start;padding-top:46px}
.article-main{background:var(--card);border-radius:20px;padding:44px 46px;box-shadow:var(--shadow);min-width:0}
.article-main h1{font-size:30px;font-weight:800;line-height:1.4;margin-bottom:18px;color:var(--dark)}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:26px}
.article-meta a{color:var(--brand)}
.article-main h2{font-size:22px;font-weight:800;margin:34px 0 14px;color:var(--dark);scroll-margin-top:90px;padding-left:14px;border-left:4px solid var(--brand)}
.article-main p{font-size:15.5px;color:#3a3d55;margin-bottom:16px}
.article-main .lead{font-size:16.5px;color:var(--ink);background:rgba(109,74,255,.05);border-radius:12px;padding:16px 18px;border-left:3px solid var(--brand)}
.article-main .quote{background:linear-gradient(135deg,rgba(109,74,255,.07),rgba(68,212,156,.08));border-radius:14px;padding:18px 20px;margin:20px 0;font-size:15px}
.article-main .quote b{color:var(--brand)}
.article-fig{margin:22px 0}
.article-fig img{border-radius:14px;width:100%;aspect-ratio:2/1;object-fit:cover}
.article-fig figcaption{font-size:12.5px;color:var(--muted);margin-top:8px;text-align:center}
.data-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.data-table th,.data-table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.data-table th{background:rgba(109,74,255,.07);color:var(--dark);font-weight:700}
.data-table td b{color:var(--brand)}
.article-nav{display:flex;justify-content:space-between;gap:14px;margin-top:36px;padding-top:22px;border-top:1px solid var(--line);font-size:14px}
.article-nav a{color:var(--muted);transition:color .2s;max-width:45%}
.article-nav a:hover{color:var(--brand)}
.article-nav .next{margin-left:auto;text-align:right}
.back-list{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:13.5px;color:var(--brand);font-weight:600}
/* ===== article sidebar ===== */
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:22px}
.side-card{background:var(--card);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
.side-card h3{font-size:16px;font-weight:800;color:var(--dark);margin-bottom:16px;padding-left:12px;border-left:4px solid var(--brand)}
.toc-list{position:relative}
.toc-list::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}
.toc-list li{position:relative;padding:7px 0 7px 26px;cursor:pointer;font-size:13.5px;color:var(--muted);transition:color .2s}
.toc-list li::before{content:"";position:absolute;left:2px;top:13px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid #c9c6e0;transition:all .2s}
.toc-list li:hover{color:var(--brand)}
.toc-list li.active{color:var(--brand);font-weight:700}
.toc-list li.active::before{border-color:var(--brand);background:var(--brand);box-shadow:0 0 0 3px rgba(109,74,255,.15)}
.rank-list li{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line)}
.rank-list li:last-child{border-bottom:none}
.rank-badge{flex-shrink:0;width:26px;height:26px;border-radius:8px;background:#e5e5ee;color:var(--muted);font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.rank-list li:nth-child(1) .rank-badge{background:linear-gradient(135deg,#6d4aff,#9b6dff);color:#fff}
.rank-list li:nth-child(2) .rank-badge{background:linear-gradient(135deg,#ff9d3c,#ffb020);color:#fff}
.rank-list li:nth-child(3) .rank-badge{background:linear-gradient(135deg,#ffd166,#ffb020);color:#5b3a00}
.rank-list li:hover .rank-badge{transform:scale(1.15)}
.rank-list a{font-size:13.5px;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.rank-list a:hover{color:var(--brand)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
.tag-cloud a{font-size:12.5px;color:var(--muted);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 14px;transition:all .2s}
.tag-cloud a:hover{color:var(--brand);border-color:var(--brand);background:rgba(109,74,255,.06)}
/* ===== related ===== */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
/* ===== comments ===== */
.comments{margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.comments h3{font-size:18px;margin-bottom:18px;color:var(--dark)}
.comment{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line)}
.comment:last-child{border-bottom:none}
.cmt-ava{width:42px;height:42px;flex-shrink:0;border-radius:50%;background:linear-gradient(135deg,#6d4aff,#44d49c);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:16px}
.cmt-body b{font-size:14px;display:block}
.cmt-body .cd{font-size:12px;color:var(--muted)}
.cmt-body p{font-size:14px;margin-top:4px;color:#3a3d55}
/* ===== sitemap ===== */
.sitemap-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.smap-card{background:var(--card);border-radius:16px;padding:26px;box-shadow:var(--shadow)}
.smap-card h2{font-size:17px;margin-bottom:14px;color:var(--dark);padding-left:12px;border-left:4px solid var(--brand)}
.smap-card a{display:block;font-size:14px;color:var(--muted);padding:7px 0;transition:all .2s}
.smap-card a:hover{color:var(--brand);padding-left:6px}
/* ===== 404 ===== */
.err-wrap{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:radial-gradient(900px 500px at 50% -10%,rgba(109,74,255,.35),transparent),linear-gradient(160deg,#0d0920,#1a1433);color:#fff;padding:20px}
.err-wrap .code{font-size:130px;font-weight:800;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.err-wrap h1{font-size:26px;margin:10px 0 12px}
.err-wrap p{color:rgba(255,255,255,.7);margin-bottom:26px}
.err-wrap .hint{font-size:13px;color:rgba(255,255,255,.5);margin-top:18px}
/* ===== toast / misc ===== */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--dark);color:#fff;padding:12px 24px;border-radius:999px;font-size:14px;box-shadow:0 12px 30px rgba(0,0,0,.3);opacity:0;visibility:hidden;transition:all .3s;z-index:2000}
.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.reveal{opacity:0;transform:translateY(26px);transition:all .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
/* ===== responsive 992 ===== */
@media(max-width:992px){
.sec{padding:56px 0}
.header-cta .btn-primary{display:none}
.burger{display:flex}
.nav{position:fixed;top:72px;left:0;right:0;background:rgba(18,13,40,.98);backdrop-filter:blur(16px);flex-direction:column;align-items:stretch;padding:14px 20px 26px;gap:2px;display:none;max-height:calc(100vh - 72px);overflow-y:auto}
.nav.open{display:flex}
.nav>li>a{justify-content:space-between;padding:13px 8px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.08)}
.dropdown{position:static;transform:none;opacity:1;visibility:visible;display:none;background:rgba(255,255,255,.05);box-shadow:none;margin:2px 0 6px;min-width:0;padding:4px 8px}
.nav>li.open>.dropdown{display:block}
.nav>li:hover>.dropdown{transform:none}
.dropdown a{color:rgba(255,255,255,.8)}
.dropdown a:hover{background:rgba(68,212,156,.12);color:#5ee6b4}
.hero{padding:120px 0 60px}
.hero-grid,.dl-hero-grid{grid-template-columns:1fr;gap:36px}
.hero h1{font-size:36px}
.hero-sub{margin-left:auto;margin-right:auto}
.hero-stats{justify-content:center}
.feat-grid,.speed-grid{grid-template-columns:repeat(2,1fr)}
.protocol-grid,.scene-grid,.steps-grid,.pricing-grid,.testi-grid,.news-grid,.ver-grid,.req-grid,.related-grid,.sitemap-cols{grid-template-columns:repeat(2,1fr)}
.price-card.hot{transform:none}
.price-card.hot:hover{transform:translateY(-6px)}
.article-layout{grid-template-columns:1fr}
.sidebar{position:static;display:grid;grid-template-columns:1fr;gap:22px}
.article-main{padding:30px 24px}
.news-row{flex-direction:column;align-items:stretch}
.news-row .nr-img{width:100%}
.footer-grid{grid-template-columns:1fr 1fr}
.demo-body{grid-template-columns:1fr}
}
/* ===== responsive 768 ===== */
@media(max-width:768px){
.sec{padding:44px 0}
.hero h1{font-size:30px}
.sec-head h2{font-size:26px}
.page-hero h1{font-size:28px}
.article-main h1{font-size:23px}
.feat-grid,.speed-grid,.protocol-grid,.scene-grid,.steps-grid,.pricing-grid,.testi-grid,.news-grid,.ver-grid,.req-grid,.related-grid,.sitemap-cols{grid-template-columns:1fr}
.hero-stats{gap:22px}
.hero-btns .btn{width:100%}
.btn{width:100%}
.hero-btns{flex-direction:column}
.dl-meta{justify-content:space-between}
.footer-grid{grid-template-columns:1fr}
.footer-bottom{justify-content:center;text-align:center}
.demo{padding:14px}
.gauge{width:150px;height:150px}
.article-nav{flex-direction:column;gap:10px}
.article-nav a{max-width:100%}
.article-nav .next{text-align:left;margin-left:0}
.err-wrap .code{font-size:90px}
}
/* ===== responsive 480 ===== */
@media(max-width:480px){
.container{padding:0 16px}
.hero h1{font-size:26px}
.hero-sub{font-size:15px}
.sec-head h2{font-size:23px}
.page-hero h1{font-size:24px}
.demo-metrics{flex-direction:column}
.demo-toggle{min-width:48%}
.feat-card,.scene-card,.step-card,.price-card{padding:22px 18px}
.article-main{padding:22px 16px}
.article-main p{font-size:14.5px}
.rank-badge{width:24px;height:24px}
.testi-grid{gap:14px}
}

/* ===== sitemap ===== */
.sm-wrap{display:grid;gap:22px;padding-bottom:8px}
.sm-block{background:var(--card);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.sm-block h2{font-size:20px;color:var(--ink);padding-left:12px;border-left:4px solid var(--brand);margin-bottom:18px}
.sm-block ul{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;list-style:none}
.sm-block a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:13px 18px;background:var(--bg);border-radius:11px;font-size:14.5px;color:var(--ink);transition:all .25s}
.sm-block a:hover{background:#efeaff;color:var(--brand);transform:translateX(4px)}
.sm-block a small{color:var(--muted);font-size:12px;flex-shrink:0}
@media(max-width:720px){.sm-block ul{grid-template-columns:1fr}}