:root{
  --bg:#101a46;
  --bg-deep:#0b1234;
  --panel:#162456;
  --panel-2:#1c2f68;
  --text:#f8fbff;
  --muted:#b8c2e1;
  --line:rgba(255,255,255,.12);
  --accent:#d9ff2f;
  --accent-2:#6be2d0;
  --shadow:0 22px 60px rgba(3,8,28,.34);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(1120px,calc(100% - 40px));margin:auto}
.skip-link{position:absolute;left:-999px;top:0;background:#fff;color:#000;padding:10px;z-index:100}.skip-link:focus{left:10px;top:10px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(11,18,52,.84);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.header-inner{min-height:72px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center}.brand img{width:94px;height:auto}.top-nav{display:flex;gap:26px;margin-left:auto}.top-nav a{font-size:.92rem;color:var(--muted)}.top-nav a:hover{color:#fff}.header-actions{display:flex;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 20px;border-radius:999px;font-weight:800;font-size:.92rem;transition:.2s ease;border:1px solid transparent}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--accent);color:#10152a;box-shadow:0 10px 28px rgba(217,255,47,.18)}.btn-primary:hover{background:#e5ff6d}.btn-secondary{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16)}.btn-ghost{border-color:rgba(255,255,255,.18);color:#fff}.btn-large{min-height:52px;padding:0 26px}.btn-block{width:100%}
.hero{position:relative;overflow:hidden;padding:96px 0 88px;background:radial-gradient(circle at 10% 0%,#253a83 0,transparent 38%),linear-gradient(180deg,#111d4a 0%,#101a46 100%)}.hero-glow{position:absolute;border-radius:50%;filter:blur(30px);opacity:.28}.hero-glow-one{width:380px;height:380px;background:#72d8cf;right:-170px;top:-120px}.hero-glow-two{width:300px;height:300px;background:#d9ff2f;left:-180px;bottom:-170px}.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:64px;align-items:center}.eyebrow{display:inline-block;margin-bottom:14px;color:var(--accent);font-size:.76rem;font-weight:900;text-transform:uppercase;letter-spacing:.14em}.hero h1,.section h2,.responsible h2{margin:0 0 20px;line-height:1.08;letter-spacing:-.035em}.hero h1{font-size:clamp(2.45rem,5vw,4.8rem);max-width:820px}.hero-lead{font-size:1.12rem;color:var(--muted);max-width:720px}.hero-actions{display:flex;gap:14px;margin:34px 0 26px}.trust-row{display:flex;gap:20px;flex-wrap:wrap;color:#dfe7ff;font-size:.87rem}.trust-row span:before{content:"✓";color:var(--accent);font-weight:900;margin-right:7px}.hero-card{background:linear-gradient(160deg,rgba(28,47,104,.96),rgba(19,31,76,.96));border:1px solid rgba(255,255,255,.14);border-radius:28px;padding:26px;box-shadow:var(--shadow)}.hero-logo-wrap{display:grid;place-items:center;min-height:120px;border-radius:20px;background:radial-gradient(circle,#314a9b 0,#172756 68%)}.hero-logo-wrap img{width:180px;height:auto}.hero-card-content{padding:24px 4px 18px}.hero-card-label{margin:0;color:var(--muted);font-size:.84rem;text-transform:uppercase;letter-spacing:.1em}.hero-card strong{display:block;font-size:2.2rem;line-height:1.1;margin:8px 0}.hero-card-content p:not(.hero-card-label){color:var(--muted);font-size:.94rem}.text-link{color:var(--accent);font-weight:800}.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mini-stats div{padding:13px 8px;border-radius:14px;background:rgba(255,255,255,.055);text-align:center}.mini-stats b{display:block}.mini-stats span{font-size:.72rem;color:var(--muted)}
.section{padding:88px 0}.section-alt{background:var(--bg-deep)}.section-heading{max-width:760px;margin-bottom:38px}.section-heading.compact{margin-bottom:28px}.section h2{font-size:clamp(2rem,3.5vw,3.15rem)}.section-heading p,.article-card p,.faq-grid>div>p{color:var(--muted)}
.promo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.promo-card{display:flex;gap:18px;padding:24px;border-radius:var(--radius);background:linear-gradient(180deg,var(--panel-2),var(--panel));border:1px solid var(--line);box-shadow:var(--shadow)}.promo-icon{flex:0 0 56px;width:56px;height:56px;border-radius:17px;background:rgba(217,255,47,.1);display:grid;place-items:center;font-size:1.65rem}.tag{display:inline-block;color:var(--accent);font-size:.74rem;font-weight:900;text-transform:uppercase}.promo-card h3{margin:5px 0 10px;line-height:1.25}.promo-card p{color:var(--muted);font-size:.92rem}
.split-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:start}.steps{list-style:none;padding:0;margin:34px 0 0;display:grid;gap:18px}.steps li{display:grid;grid-template-columns:46px 1fr;gap:16px;align-items:start}.steps li>span{width:46px;height:46px;border-radius:14px;background:var(--accent);color:#11182f;display:grid;place-items:center;font-weight:900}.steps h3{margin:0 0 5px}.steps p{margin:0;color:var(--muted)}.info-panel{position:sticky;top:100px;background:linear-gradient(180deg,var(--panel-2),var(--panel));border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.panel-heading{display:flex;align-items:center;gap:16px;margin-bottom:16px}.panel-heading h3{margin:0}.facts-list{margin:0 0 24px}.facts-list div{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px solid var(--line)}.facts-list dt{color:var(--muted)}.facts-list dd{margin:0;text-align:right;font-weight:700}.fine-print{font-size:.76rem;color:var(--muted);margin:16px 0 0}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.category-card{padding:26px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.035)}.category-card>span{font-size:2rem}.category-card h3{margin:12px 0 7px}.category-card p{margin:0;color:var(--muted);font-size:.92rem}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:34px}.article-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(26px,5vw,54px)}.article-card h3{margin-top:30px;font-size:1.35rem}.sidebar{display:grid;gap:20px;align-content:start}.side-card{padding:24px;border-radius:20px;background:var(--panel);border:1px solid var(--line)}.side-card h3{margin-top:0}.check-list{list-style:none;padding:0;margin:0;display:grid;gap:11px;color:var(--muted)}.check-list li:before{content:"✓";color:var(--accent);font-weight:900;margin-right:9px}.keyword-cloud{display:flex;flex-wrap:wrap;gap:8px}.keyword-cloud span{padding:7px 10px;border-radius:999px;background:rgba(255,255,255,.07);font-size:.79rem;color:#dbe5ff}
.table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;min-width:700px;background:var(--panel)}th,td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line)}th{background:var(--panel-2);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent)}td{color:#dce4fb}.faq-grid{display:grid;grid-template-columns:.65fr 1.35fr;gap:64px}.accordion{display:grid;gap:12px}details{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px 20px}summary{cursor:pointer;font-weight:800}details p{color:var(--muted);margin:12px 0 0}.responsible{padding:46px 0;background:linear-gradient(90deg,#263b82,#17275b)}.responsible-inner{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}.responsible h2{font-size:clamp(1.6rem,3vw,2.55rem);margin-bottom:0}.responsible p{color:#e2e8ff;margin:0}
.site-footer{background:#080e29;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:38px}.footer-grid p{color:var(--muted);max-width:420px}.footer-grid h3{margin:0 0 12px}.footer-grid a{display:block;color:var(--muted);margin:7px 0}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;color:#8e9abd;font-size:.82rem}
@media(max-width:900px){.top-nav{display:none}.hero-grid,.split-grid,.content-layout,.faq-grid{grid-template-columns:1fr}.hero{padding-top:70px}.hero-card{max-width:620px}.promo-grid,.category-grid{grid-template-columns:repeat(2,1fr)}.info-panel{position:static}.responsible-inner{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}}
@media(max-width:620px){.container{width:min(100% - 24px,1120px)}.site-header .btn-ghost{display:none}.header-inner{gap:12px}.brand img{width:82px}.header-actions{margin-left:auto}.btn{padding:0 15px}.hero{padding:56px 0 64px}.hero h1{font-size:2.48rem}.hero-actions{flex-direction:column;align-items:stretch}.promo-grid,.category-grid{grid-template-columns:1fr}.promo-card{padding:20px}.section{padding:66px 0}.split-grid{gap:40px}.content-layout{gap:22px}.article-card{padding:24px}.mini-stats{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.top-nav{display:none}.facts-list div{align-items:flex-start}.facts-list dd{max-width:55%}}
/* Alternate DK88 edition */
:root{--bg:#0d1740;--bg-deep:#080f2c;--panel:#132354;--panel-2:#203776;--accent:#cfff2f;--accent-2:#62ddff}
.hero{background:radial-gradient(circle at 82% 12%,rgba(98,221,255,.18),transparent 30%),radial-gradient(circle at 8% 0%,#28428c 0,transparent 39%),linear-gradient(180deg,#101c4c 0%,#0d1740 100%)}
.hero-card{transform:rotate(.35deg)}
.promo-card:nth-child(2){transform:translateY(10px)}
.category-card:hover{transform:translateY(-4px);border-color:rgba(207,255,47,.55)}
.category-card{transition:.2s ease}
/* CIKM2020 landing-page edition */
:root{--bg:#0a1438;--bg-deep:#060d28;--panel:#122252;--panel-2:#1a3475;--accent:#d8ff36;--accent-2:#56e5c5}
.hero{background:radial-gradient(circle at 76% 12%,rgba(86,229,197,.18),transparent 31%),radial-gradient(circle at 7% 0%,#29448e 0,transparent 42%),linear-gradient(180deg,#0f1c4d 0%,#0a1438 100%)}
.hero-card{border-color:rgba(216,255,54,.26)}
.promo-card:nth-child(2){transform:none}
.promo-card:hover,.category-card:hover{transform:translateY(-5px);border-color:rgba(216,255,54,.55)}
.promo-card,.category-card{transition:.2s ease}