:root{
  --bg:#07111f;--bg2:#0b1728;--card:rgba(255,255,255,.92);--text:#e7edf7;--text-dark:#122034;--muted:#8ea1bb;--line:rgba(255,255,255,.08);
  --brand:#18c6d0;--brand2:#2f7cff;--brand3:#6ee7f2;--accent:#0f2038;--shadow:0 18px 60px rgba(2,8,23,.28);--radius:22px;--max:1220px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:radial-gradient(circle at top left,rgba(24,198,208,.14),transparent 26%),radial-gradient(circle at top right,rgba(47,124,255,.14),transparent 30%),linear-gradient(180deg,#06101d 0,#0b1422 200px,#0a1320 100%)}
a{color:var(--brand3);text-decoration:none;transition:.25s ease} a:hover{text-decoration:none;color:#fff}
.container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
.topbar{background:linear-gradient(90deg,rgba(24,198,208,.16),rgba(47,124,255,.14));border-bottom:1px solid rgba(255,255,255,.06);color:#c9d9ef;font-size:13px;backdrop-filter:blur(10px)}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding:10px 0;gap:16px;flex-wrap:wrap}
.nav{position:sticky;top:0;z-index:20;background:rgba(7,17,31,.72);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:14px 0;gap:18px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;color:#fff;letter-spacing:.2px}
.logo img{height:44px;width:auto;display:block;filter:drop-shadow(0 8px 18px rgba(24,198,208,.18))}
.logo .logo-text{display:flex;flex-direction:column;line-height:1.05}
.logo .logo-text small{font-size:12px;font-weight:600;color:#9cc0d6;letter-spacing:.08em}
.nav-links{display:flex;gap:18px;flex-wrap:wrap}
.nav-links a{color:#dce7f7;font-weight:600;padding:10px 0;position:relative}
.nav-links a:after{content:"";position:absolute;left:0;bottom:4px;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s ease}
.nav-links a:hover:after{width:100%}

.nav-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;width:46px;height:46px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);cursor:pointer;flex-shrink:0}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:999px;background:#e7edf7;transition:.25s ease}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.hero{padding:44px 0 28px}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:22px;align-items:stretch}
.hero-card,.panel,.card,.toolbox,.article,.ad,.cta,.footer-grid>div,.hero-side,.dxtech-promo{background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(245,249,255,.92));border:1px solid rgba(255,255,255,.56);border-radius:var(--radius);box-shadow:var(--shadow);color:var(--text-dark)}
.hero-card{padding:38px;position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(255,255,255,.98),rgba(231,242,255,.92) 54%,rgba(224,252,255,.88))}
.hero-card:before{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;background:radial-gradient(circle,rgba(24,198,208,.24),transparent 66%);pointer-events:none}
.hero-card:after{content:"";position:absolute;left:-60px;bottom:-60px;width:260px;height:260px;background:radial-gradient(circle,rgba(47,124,255,.16),transparent 68%);pointer-events:none}
.hero-card h1{margin:0 0 14px;font-size:44px;line-height:1.08;letter-spacing:-.02em;color:#0b1830;position:relative;z-index:1}
.hero-card p{margin:0;color:#4b617c;font-size:17px;line-height:1.85;max-width:90%;position:relative;z-index:1}
.hero-side{padding:22px;display:grid;gap:16px;background:linear-gradient(180deg,rgba(17,31,52,.88),rgba(10,24,44,.9));color:#dce7f7;border-color:rgba(255,255,255,.08)}
.hero-side .card,.hero-side .ad{background:rgba(255,255,255,.06);color:#e8eef8;border:1px solid rgba(255,255,255,.08);box-shadow:none}
.hero-side .card h3,.hero-side .ad strong{color:#fff}
.search{display:flex;gap:12px;align-items:center;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08);padding:10px 12px;border-radius:14px}
.search input{border:0;background:transparent;outline:none;flex:1;font-size:15px;color:#dce7f7}
.search input::placeholder{color:#98abc3}
.btn{display:inline-block;position:relative;z-index:2;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff!important;padding:13px 20px;border-radius:14px;font-weight:800;letter-spacing:.02em;box-shadow:0 12px 24px rgba(47,124,255,.22)}
.btn.secondary{background:rgba(255,255,255,.72);color:#113057!important;border:1px solid rgba(47,124,255,.18);box-shadow:none}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;position:relative;z-index:1}
.badge{padding:8px 13px;border-radius:999px;background:rgba(24,198,208,.12);color:#0b5574;font-weight:800;font-size:13px;border:1px solid rgba(24,198,208,.18)}
.section{padding:16px 0 30px}
.section h2{font-size:30px;margin:0 0 10px;color:#f2f7ff}
.section .sub{color:#9eb2ca;margin:0 0 18px;line-height:1.8}
.grid{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}
.card{padding:20px;transition:.25s ease;position:relative;overflow:hidden}
.card:hover,.article:hover,.toolbox:hover,.dxtech-promo:hover{transform:translateY(-4px);box-shadow:0 22px 60px rgba(2,8,23,.32)}
.card:before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--brand),var(--brand2));opacity:.95}
.card h3{margin:0 0 8px;font-size:19px;color:#122034}
.card p{margin:0;color:#5a6d84;line-height:1.75;font-size:15px}
.list{display:grid;gap:10px;margin-top:10px}
.list a{display:block;padding:12px 14px;border:1px solid #dde8f6;border-radius:14px;background:#f8fbff;color:#16304f}
.ad{padding:18px;text-align:center;color:#61748d;background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(236,244,255,.92))}
.ad strong{display:block;color:#193352;margin-bottom:8px}
.tool-layout{display:grid;grid-template-columns:1.28fr .72fr;gap:20px}
.toolbox{padding:26px;background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(244,250,255,.95))}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-grid.single{grid-template-columns:1fr}
label{display:block;font-size:14px;font-weight:800;margin-bottom:8px;color:#30415b}
input,select,textarea{width:100%;padding:13px 14px;border:1px solid #d8e1ee;border-radius:14px;font-size:15px;outline:none;background:#fff}
.result{margin-top:16px;padding:16px;border-radius:16px;background:linear-gradient(135deg,#edf7ff,#f1fdff);border:1px dashed #9cc9ff;color:#183252;font-weight:800;white-space:pre-line;line-height:1.9}
.article{padding:24px;background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(246,250,255,.95))}
.article h1{margin:0 0 10px;font-size:38px;color:#0b1830}
.article h2{margin:24px 0 10px;font-size:24px;color:#132440}
.article p,.article li{color:#53657c;line-height:1.95}
.article ul{padding-left:20px}
.meta{color:#8ba0b7;font-size:14px}
.breadcrumb{font-size:14px;color:#9bb0c9;margin:16px 0}
.breadcrumb a{color:#b5c8df}
.cta{padding:24px;display:flex;justify-content:space-between;gap:20px;align-items:center}
.dxtech-promo{margin:20px 0 0;padding:26px 28px;background:linear-gradient(135deg,rgba(12,27,49,.96),rgba(16,35,64,.96));color:#dbe7f8;border:1px solid rgba(110,231,242,.14);position:relative;overflow:hidden}
.dxtech-promo:before{content:"";position:absolute;right:-40px;top:-20px;width:220px;height:220px;background:radial-gradient(circle,rgba(24,198,208,.18),transparent 65%)}
.dxtech-promo h3{margin:0 0 10px;font-size:24px;color:#fff}
.dxtech-promo p{margin:0;color:#b8c9dd;line-height:1.85;max-width:820px}
.dxtech-promo .promo-row{display:flex;justify-content:space-between;gap:22px;align-items:center;flex-wrap:wrap;position:relative;z-index:1}
.dxtech-promo .promo-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.dxtech-promo .promo-tags span{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08);font-size:13px;color:#dff8fb}
.footer{margin-top:28px;background:linear-gradient(180deg,#08111d,#0c1625);color:#d6dfec;border-top:1px solid rgba(255,255,255,.08)}
.footer .container{padding:34px 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:18px;background:transparent!important;border:none!important;box-shadow:none!important}
.footer-grid>div{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);color:#d6dfec}
.footer h4{margin:0 0 10px;color:#fff}
.footer p,.footer a{color:#d6dfec;line-height:1.85}
.copy{border-top:1px solid rgba(255,255,255,.12);margin-top:18px;padding-top:18px;font-size:14px;color:#c7d2e2}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-block;padding:8px 12px;border-radius:999px;background:#f2f5f9;border:1px solid #dde7f3;color:#32455f;font-size:14px}
.business-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:14px}.business-grid .tag{display:flex;align-items:center;justify-content:center;padding:12px 10px;text-align:center;font-weight:700;min-height:48px}
.notice{font-size:14px;color:#92a6bf}
.promo-link{display:inline-flex;align-items:center;gap:8px;color:#fff;font-weight:800}
.promo-link:hover{color:#fff;opacity:.92}
@media (max-width:1000px){.hero-grid,.tool-layout,.grid,.grid-3,.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:720px){.hero-grid,.tool-layout,.grid,.grid-3,.grid-2,.footer-grid,.form-grid{grid-template-columns:1fr}.hero-card h1,.article h1{font-size:32px}.hero-card p{max-width:100%}.nav-inner{gap:12px;align-items:center;flex-wrap:wrap}.logo img{height:38px}.nav-toggle{display:flex;margin-left:auto}.nav-links{display:none;width:100%;flex-direction:column;gap:0;padding:10px 0 4px}.nav-links a{display:block;width:100%;padding:12px 0}.nav-links a:after{bottom:2px}.nav-links a.external-link::after{content:" ↗";position:static;width:auto;height:auto;background:none;transition:none}.nav-links a:hover:after{width:auto}.nav-links.open{display:flex}}


/* Premium tools focus updates */
.topbar .container{gap:16px;justify-content:space-between;flex-wrap:wrap;}
.nav{backdrop-filter: blur(12px); background: rgba(8,16,32,.88); border-bottom:1px solid rgba(255,255,255,.08);}
.nav-links a.external-link::after{content:" ↗";opacity:.7;font-size:.9em;}
.hero-card p,.section .sub{max-width:900px;}
.tool-highlight{background:linear-gradient(135deg, rgba(0,212,255,.08), rgba(15,98,254,.12)); border:1px solid rgba(90,145,255,.18); border-radius:20px; padding:24px; box-shadow:0 10px 30px rgba(0,0,0,.18);}
.tool-highlight h2{margin-top:0;}
.promo-panel{display:grid;gap:14px;background:linear-gradient(135deg,#0b1730,#132445);border:1px solid rgba(255,255,255,.08);padding:22px;border-radius:20px;box-shadow:0 12px 36px rgba(0,0,0,.2);}
.promo-panel .btn{width:max-content;}
.footer a{color:#9fd8ff;}


/* March 17 UI refinement */
.feature-grid{grid-template-columns:repeat(4,minmax(0,1fr));align-items:stretch;}
.feature-grid .card{min-height:154px;display:flex;flex-direction:column;justify-content:flex-start;background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(245,248,255,.94));}
.feature-grid .card h3{font-size:18px;margin-bottom:10px;}
.feature-grid .card p{font-size:15px;line-height:1.8;}
.dxtech-promo,.dxtech-promo .promo-row{text-align:center;justify-content:center;}
.dxtech-promo p{margin:0 auto;max-width:920px;}
.dxtech-promo .promo-tags{justify-content:center;flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;padding-bottom:4px;}
.dxtech-promo .promo-row>div:last-child{width:auto;display:block;}
.dxtech-promo .promo-link{min-width:220px;justify-content:center;}
.dxtech-promo .promo-inline-link{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff!important;font-size:13px;font-weight:800;box-shadow:0 10px 24px rgba(47,124,255,.22);flex:0 0 auto;}
.copy + .container.section,.promo-panel{display:none!important;}
@media (max-width:1000px){.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:720px){.feature-grid{grid-template-columns:1fr;}.dxtech-promo .promo-tags{flex-wrap:wrap;white-space:normal;overflow:visible;}}