:root{--bg:#06020f;--surface:#100520;--surface2:#1a0838;--border:#2d1050;--violet:#a78bfa;--violet-dark:#7c3aed;--violet-glow:rgba(167,139,250,.16);--text:#ede8ff;--muted:#7c6db0;--radius:12px}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:'PingFang SC','Microsoft YaHei',sans-serif;line-height:1.7;font-size:16px}a{color:inherit;text-decoration:none}ul{list-style:none}
nav{position:sticky;top:0;z-index:100;background:rgba(6,2,15,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--violet-dark),var(--violet));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px}
.logo em{color:var(--violet);font-style:normal}
.nav-links{display:flex;align-items:center;gap:26px;font-size:15px}
.nav-links a{color:var(--muted);transition:color .2s}.nav-links a:hover,.nav-links a.active{color:var(--text)}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 22px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;transition:.2s;border:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--violet-dark),var(--violet));color:#06020f}
.btn-primary:hover{opacity:.88;transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--violet);border:1.5px solid var(--violet-dark)}
.btn-outline:hover{background:var(--violet-glow)}
.btn-lg{padding:14px 36px;font-size:17px;border-radius:14px}
.nav-cta{padding:8px 18px;font-size:14px}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
/* COMPACT HERO + SPEED METRICS BAR */
.hero{padding:70px 0 0;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-60px;left:50%;transform:translateX(-50%);width:700px;height:500px;background:radial-gradient(ellipse at top,rgba(124,58,237,.15) 0%,transparent 60%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(167,139,250,.1);border:1px solid rgba(167,139,250,.25);color:var(--violet);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:600;margin-bottom:16px}
.hero h1{font-size:clamp(1.9rem,5vw,3.2rem);font-weight:800;line-height:1.2;margin-bottom:14px}
.hl{background:linear-gradient(135deg,var(--violet-dark),var(--violet));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:1.05rem;color:var(--muted);max-width:560px;margin:0 auto 28px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:0}
/* SPEED METRICS BAR */
.speed-bar{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-top:40px;padding:28px 0}
.speed-metrics{display:grid;grid-template-columns:repeat(4,1fr);max-width:900px;margin:0 auto;gap:0}
.speed-metric{text-align:center;padding:8px 20px;border-right:1px solid var(--border)}
.speed-metric:last-child{border-right:none}
.speed-val{font-size:2.2rem;font-weight:900;color:var(--violet);line-height:1;font-variant-numeric:tabular-nums}
.speed-unit{font-size:13px;color:var(--violet);font-weight:600;margin-left:2px}
.speed-desc{font-size:12px;color:var(--muted);margin-top:5px}
/* Sections */
.section{padding:72px 0}
.section-title{text-align:center;font-size:1.8rem;font-weight:700;margin-bottom:12px}
.section-sub{text-align:center;color:var(--muted);margin-bottom:40px;font-size:15px}
/* LEFT-ACCENT FEATURE CARDS */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--violet-dark);border-radius:0 12px 12px 0;padding:24px 22px;transition:border-left-color .2s,transform .2s}
.feat-card:hover{border-left-color:var(--violet);transform:translateX(3px)}
.feat-icon{font-size:1.8rem;margin-bottom:12px}
.feat-card h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.feat-card p{font-size:13.5px;color:var(--muted);line-height:1.7}
/* SPEED RANKING TABLE */
.speed-table-wrap{overflow-x:auto;max-width:960px;margin:0 auto}
.speed-table{width:100%;border-collapse:collapse;font-size:14px}
.speed-table th{background:var(--surface2);color:var(--muted);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}
.speed-table td{padding:14px 16px;border-bottom:1px solid var(--border);color:var(--text)}
.speed-table tr:last-child td{border-bottom:none}
.speed-table tr:hover td{background:rgba(167,139,250,.04)}
.speed-tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.speed-tag.fast{background:rgba(167,139,250,.15);color:var(--violet)}
.speed-tag.ok{background:rgba(251,191,36,.1);color:#fbbf24}
.speed-bar-cell{height:8px;background:var(--border);border-radius:4px;overflow:hidden}
.speed-bar-fill{height:100%;background:linear-gradient(90deg,var(--violet-dark),var(--violet));border-radius:4px}
/* Plans */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:900px;margin:0 auto}
.plan-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px 28px;transition:transform .2s}
.plan-card.featured{border-color:var(--violet-dark);box-shadow:0 0 32px var(--violet-glow);transform:scale(1.03)}
.plan-badge{display:inline-block;background:var(--violet-dark);color:#06020f;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;margin-bottom:14px}
.plan-name{font-size:1.2rem;font-weight:700;margin-bottom:4px}
.plan-desc{font-size:13px;color:var(--muted);margin-bottom:18px}
.plan-price{font-size:2.4rem;font-weight:800;color:var(--violet);line-height:1;margin-bottom:4px}
.plan-price span{font-size:14px;color:var(--muted);font-weight:400}
.plan-features{margin:18px 0 24px;display:flex;flex-direction:column;gap:9px}
.plan-features li{font-size:14px;color:var(--muted);padding-left:20px;position:relative}
.plan-features li::before{content:'✓';position:absolute;left:0;color:var(--violet);font-weight:700}
.plan-features li.cross{color:#374151}.plan-features li.cross::before{content:'✗';color:#374151}
/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;max-width:860px;margin:0 auto}
.step{text-align:center}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,var(--violet-dark),var(--violet));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:800;color:#06020f;margin:0 auto 14px}
.step h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}
/* Platform */
.platform-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;max-width:800px;margin:0 auto}
.platform-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 12px;text-align:center}
.platform-card .p-icon{font-size:1.8rem;margin-bottom:8px}
.platform-card strong{display:block;font-size:13px}
.platform-card p{color:var(--muted);font-size:12px;margin-top:4px}
/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.stars{color:#f59e0b;font-size:14px;margin-bottom:10px}
.review-card p{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:14px}
.reviewer{font-size:13px;font-weight:600;color:var(--violet)}
/* FAQ */
.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:none;border:none;color:var(--text);font-size:15px;font-weight:600;cursor:pointer;text-align:left;gap:12px}
.faq-arrow{font-size:18px;color:var(--violet);transition:transform .3s;flex-shrink:0}
.faq-item.open .faq-arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s}
.faq-item.open .faq-a{max-height:400px;padding:0 22px 18px}
.faq-a p{font-size:14px;color:var(--muted);line-height:1.8}
/* CTA */
.cta-section{padding:80px 0;background:linear-gradient(135deg,#100520,#1a0838,#100520);text-align:center}
.cta-section h2{font-size:2rem;font-weight:800;margin-bottom:12px}
.cta-section p{color:var(--muted);margin-bottom:32px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
/* Inner pages */
.page-hero{padding:52px 0 40px;background:var(--surface);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:2rem;font-weight:800;margin-bottom:8px}
.page-hero p{color:var(--muted)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:12px;display:flex;align-items:center;gap:6px}
.breadcrumb a{color:var(--violet)}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:48px}
.dl-mobile{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:56px;max-width:620px;margin-left:auto;margin-right:auto}
.dl-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:30px 24px;text-align:center}
.dl-icon{font-size:2.5rem;margin-bottom:12px}
.dl-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.dl-card p{font-size:14px;color:var(--muted);margin-bottom:18px;line-height:1.6}
.dl-card .btn{width:100%;margin-bottom:8px}
.tut-content{max-width:820px;margin:0 auto}
.tut-sec{margin-bottom:48px}
.tut-sec h2{font-size:1.35rem;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.tut-sec h3{font-size:1.05rem;font-weight:700;margin:20px 0 8px}
.tut-sec p{font-size:14.5px;color:var(--muted);margin-bottom:10px;line-height:1.8}
.tut-sec ul,.tut-sec ol{padding-left:18px;display:flex;flex-direction:column;gap:8px}
.tut-sec ul{list-style:disc}.tut-sec ol{list-style:decimal}
.tut-sec li{font-size:14.5px;color:var(--muted);line-height:1.7}
.tip-box{background:rgba(167,139,250,.07);border-left:3px solid var(--violet-dark);border-radius:0 8px 8px 0;padding:12px 16px;font-size:14px;color:var(--muted);margin:12px 0}
/* Footer */
footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-brand p{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.7}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:12px}
.footer-col ul{display:flex;flex-direction:column;gap:8px}
.footer-col li a{font-size:13px;color:var(--muted);transition:color .2s}
.footer-col li a:hover{color:var(--violet)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
/* Responsive */
@media(max-width:900px){.speed-metrics{grid-template-columns:repeat(2,1fr)}.speed-metric{border-right:none;border-bottom:1px solid var(--border)}.speed-metric:nth-child(even){border-right:none}.feat-grid{grid-template-columns:1fr 1fr}.plan-grid{grid-template-columns:1fr}.plan-card.featured{transform:none}.review-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.dl-grid{grid-template-columns:1fr}.dl-mobile{grid-template-columns:1fr;max-width:400px}.steps-grid{grid-template-columns:1fr}}
@media(max-width:680px){.speed-metrics{grid-template-columns:1fr}.feat-grid{grid-template-columns:1fr}.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);padding:20px 24px 24px;flex-direction:column;align-items:flex-start;gap:18px;border-bottom:1px solid var(--border)}.nav-links.open{display:flex}.menu-toggle{display:flex}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:8px;text-align:center}.platform-grid{grid-template-columns:repeat(3,1fr)}}