/* === RESET & VARIABLES === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg-deep:#06080d;--bg-card:#0c1017;--bg-card-hover:#111822;--bg-surface:#151c28;
  --border:#1a2332;--border-bright:#2a3a52;
  --text-primary:#e8edf5;--text-secondary:#8899b0;--text-muted:#556677;
  --accent-cyan:#00d4ff;--accent-green:#00ff88;--accent-orange:#ff8a00;
  --accent-pink:#ff3d8e;--accent-purple:#a855f7;
  --glow-cyan:0 0 30px rgba(0,212,255,.15);--glow-green:0 0 30px rgba(0,255,136,.12);
  --radius:12px;--radius-lg:20px;
  --font-sans:'Noto Sans SC',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}
[data-theme="light"]{
  --bg-deep:#f5f7fa;--bg-card:#ffffff;--bg-card-hover:#f0f2f5;--bg-surface:#eef1f5;
  --border:#dde1e8;--border-bright:#c5ccd6;
  --text-primary:#1a1f2e;--text-secondary:#5a6578;--text-muted:#8895a7;
  --accent-cyan:#0099cc;--accent-green:#00a855;--accent-orange:#d97706;
  --accent-pink:#e0336b;--accent-purple:#7c3aed;
  --glow-cyan:0 0 20px rgba(0,153,204,.1);--glow-green:0 0 20px rgba(0,168,85,.08);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--bg-deep);color:var(--text-primary);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
body::before{content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");background-repeat:repeat;background-size:256px 256px;opacity:.4}
[data-theme="light"] body::before{opacity:.08}

/* === LAYOUT === */
.container{max-width:1280px;margin:0 auto;padding:0 24px}
section{padding:80px 0}

/* === HEADER === */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(6,8,13,.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:background .3s}
[data-theme="light"] .site-header{background:rgba(245,247,250,.85)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-family:var(--font-mono);font-weight:700;font-size:1.1rem;color:var(--accent-cyan);letter-spacing:-.02em}
.nav-right{display:flex;gap:32px;align-items:center}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{font-size:.875rem;color:var(--text-secondary);transition:color .2s;font-weight:400}
.nav-links a:hover{color:var(--text-primary)}
.theme-toggle{background:none;border:none;cursor:pointer;font-size:1.2rem;line-height:1;padding:6px;color:var(--text-secondary);transition:color .2s;display:flex;align-items:center}
.theme-toggle:hover{color:var(--text-primary)}

/* === HERO === */
.hero{padding-top:160px;padding-bottom:80px;text-align:center;position:relative}
.hero::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:800px;height:600px;background:radial-gradient(ellipse,rgba(0,212,255,.06) 0%,transparent 70%);pointer-events:none}
.detail-hero{padding-bottom:60px}
.back-link{display:inline-block;font-size:.85rem;color:var(--text-muted);margin-bottom:24px;transition:color .2s}
.back-link:hover{color:var(--accent-cyan)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.2);padding:6px 16px;border-radius:100px;font-size:.8rem;color:var(--accent-cyan);margin-bottom:32px;font-family:var(--font-mono)}
.hero h1{font-family:var(--font-sans);font-weight:900;font-size:clamp(2.2rem,5vw,3.5rem);line-height:1.15;letter-spacing:-.03em;margin-bottom:20px}
.hero-sub{font-size:1.1rem;color:var(--text-secondary);max-width:640px;margin:0 auto 48px;line-height:1.8;font-weight:300}
.hero-stats{display:flex;justify-content:center;gap:48px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat .num{font-family:var(--font-mono);font-size:2rem;font-weight:700;color:var(--accent-cyan)}
.hero-stat .label{font-size:.8rem;color:var(--text-muted);margin-top:4px}

/* === SECTION HEADER === */
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:900;letter-spacing:-.02em;margin-bottom:12px}
.section-header p{color:var(--text-secondary);font-size:1rem;font-weight:300}
.detail-section{padding:80px 0}

/* === MODEL CARDS === */
.model-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.model-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center;transition:border-color .3s,box-shadow .3s}
.model-card:hover{border-color:var(--border-bright);box-shadow:0 8px 40px rgba(0,0,0,.2)}
.model-card-icon{font-size:2.5rem;margin-bottom:16px}
.model-card h3{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.model-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.7}

/* === PLAN DETAIL CARDS === */
.plans-section{padding:80px 0;background:var(--bg-card);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.plans-detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;align-items:start}
.plan-detail-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;position:relative;transition:border-color .3s,box-shadow .3s}
.plan-detail-card:hover{border-color:var(--border-bright);box-shadow:0 8px 40px rgba(0,0,0,.2)}
.plan-detail-card.featured{border-color:var(--accent-cyan);box-shadow:var(--glow-cyan)}
.plan-featured-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--accent-cyan),var(--accent-green));color:var(--bg-deep);padding:4px 16px;border-radius:100px;font-size:.7rem;font-weight:700;letter-spacing:.03em;white-space:nowrap}
.plan-detail-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.plan-tier{font-size:1.5rem;font-weight:900}
.plan-badge{display:inline-block;padding:3px 10px;border-radius:6px;font-size:.7rem;font-weight:700}
.plan-detail-price{margin-bottom:8px}
.price-amount{font-family:var(--font-mono);font-size:2.5rem;font-weight:700;color:var(--accent-green)}
.price-unit{font-size:1rem;color:var(--text-muted);font-weight:400}
.plan-detail-discount{font-size:.8rem;color:var(--accent-orange);margin-bottom:24px;font-weight:500}
.plan-detail-features{list-style:none;margin-bottom:24px}
.plan-detail-features li{padding:8px 0;font-size:.9rem;color:var(--text-secondary);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}
.plan-detail-features li::before{content:'✓';color:var(--accent-green);font-weight:700;font-size:.8rem}
.plan-detail-features li:last-child{border-bottom:none}
.plan-detail-ideal{background:rgba(0,212,255,.04);border:1px solid rgba(0,212,255,.08);border-radius:var(--radius);padding:16px;margin-bottom:24px}
.ideal-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;font-weight:500}
.plan-detail-ideal p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}
.plan-detail-cta{display:block;text-align:center;background:linear-gradient(135deg,var(--accent-cyan),#0099cc);color:var(--bg-deep);padding:12px 24px;border-radius:8px;font-weight:700;font-size:.9rem;transition:all .25s}
.plan-detail-cta:hover{transform:translateY(-2px);box-shadow:var(--glow-cyan);filter:brightness(1.1)}
[data-theme="light"] .plan-detail-cta{color:#fff}

/* === MCP GRID === */
.mcp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.mcp-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:border-color .3s}
.mcp-card:hover{border-color:var(--border-bright)}
.mcp-icon{font-size:2rem;margin-bottom:12px}
.mcp-card h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.mcp-card p{font-size:.82rem;color:var(--text-secondary);line-height:1.7}

/* === TOOLS GRID === */
.tools-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.tool-chip-lg{font-size:.85rem;padding:8px 16px;border-radius:8px;background:var(--bg-surface);color:var(--text-secondary);border:1px solid var(--border);font-family:var(--font-mono);transition:border-color .2s}
.tool-chip-lg:hover{border-color:var(--border-bright);color:var(--text-primary)}

/* === HIGHLIGHT BOX === */
.highlight-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin-top:32px}
.highlight-box h3{font-size:1.1rem;font-weight:700;margin-bottom:16px}
.highlight-list{list-style:none}
.highlight-list li{padding:8px 0;font-size:.88rem;color:var(--text-secondary);display:flex;align-items:flex-start;gap:10px;line-height:1.6}
.highlight-list li::before{content:'•';color:var(--accent-cyan);font-weight:700;flex-shrink:0}

/* === TAGS === */
.tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:.7rem;font-weight:700;letter-spacing:.03em}
.tag-hot{background:rgba(255,61,142,.15);color:var(--accent-pink)}
.tag-new{background:rgba(0,212,255,.12);color:var(--accent-cyan)}
.tag-deal{background:rgba(255,138,0,.12);color:var(--accent-orange)}

/* === FAQ === */
.faq-grid{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{padding:20px 0;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:500;font-size:.95rem;color:var(--text-primary);transition:color .2s;list-style:none}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{content:'+';font-family:var(--font-mono);font-size:1.2rem;color:var(--text-muted);transition:transform .3s;flex-shrink:0}
details[open] .faq-q::after{content:'−'}
.faq-a{padding:0 0 20px;color:var(--text-secondary);font-size:.9rem;line-height:1.8;font-weight:300}

/* === FOOTER === */
.site-footer{border-top:1px solid var(--border);padding:40px 0;text-align:center}
.footer-disclaimer{font-size:.75rem;color:var(--text-muted);max-width:600px;margin:0 auto 16px;line-height:1.8}
.footer-links{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:16px}
.footer-links a{font-size:.8rem;color:var(--text-secondary);transition:color .2s}
.footer-links a:hover{color:var(--accent-cyan)}
.footer-copy{font-size:.7rem;color:var(--text-muted)}

/* === WARNING BOX === */
.warning-box{margin-top:16px;padding:16px 20px;background:rgba(255,138,0,.06);border:1px solid rgba(255,138,0,.12);border-radius:8px;font-size:.82rem;color:var(--accent-orange);line-height:1.7}

/* === SPEED PLANS SECTION === */
.speed-section-label{font-size:.85rem;color:var(--text-muted);font-weight:600;margin:32px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.speed-section-label:first-of-type{margin-top:0}

/* === ANIMATIONS === */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate{opacity:0;animation:fadeUp .6s ease forwards}
.animate-d1{animation-delay:.1s}.animate-d2{animation-delay:.2s}.animate-d3{animation-delay:.3s}.animate-d4{animation-delay:.4s}

/* === RESPONSIVE === */
@media(max-width:768px){
  section{padding:56px 0}
  .nav-links{display:none}
  .hero{padding-top:120px;padding-bottom:40px}
  .hero-stats{gap:24px}
  .hero-stat .num{font-size:1.5rem}
  .plans-detail-grid{grid-template-columns:1fr}
  .model-cards{grid-template-columns:1fr}
  .mcp-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero h1{font-size:2rem}
  .mcp-grid{grid-template-columns:1fr}
}