/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;line-height:1.6;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;background:#f5f7fa;color:#1a1a2e;transition:background .3s,color .3s;min-height:100vh;overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}
address{font-style:normal}
h1,h2,h3,h4{line-height:1.2;font-weight:700}
h1{font-size:clamp(2rem,5vw,3.5rem)}
h2{font-size:clamp(1.5rem,4vw,2.5rem);text-align:center;margin-bottom:1.5rem}
h3{font-size:1.25rem;margin-bottom:.75rem}
p{margin-bottom:1rem}
.container{max-width:1200px;margin:0 auto;padding:0 1.25rem}
.section{padding:4rem 0}
/* ===== Dark Mode ===== */
html.dark-mode body{background:#0f0f1a;color:#e0e0e0}
html.dark-mode .card{background:rgba(30,30,60,.75);border-color:rgba(255,255,255,.1);backdrop-filter:blur(12px)}
html.dark-mode .card:hover{background:rgba(40,40,80,.85)}
html.dark-mode .hero{background:linear-gradient(135deg,#0f0f2e,#1a1a4e 50%,#2a1a3e)}
html.dark-mode .nav-container{background:rgba(15,15,30,.9);border-bottom-color:rgba(255,255,255,.1)}
html.dark-mode .nav-links a:hover{color:#f0c040}
html.dark-mode .faq-question{background:rgba(30,30,60,.6);color:#e0e0e0}
html.dark-mode .faq-question:hover{background:rgba(50,50,80,.8)}
html.dark-mode .faq-answer{background:rgba(20,20,50,.5)}
html.dark-mode footer{background:#0a0a18}
html.dark-mode .back-to-top{background:#f0c040;color:#1a1a2e}
html.dark-mode .btn-primary{background:linear-gradient(135deg,#f0c040,#e6a800);color:#1a1a2e}
html.dark-mode .btn-secondary{border-color:#f0c040;color:#f0c040}
html.dark-mode .btn-secondary:hover{background:#f0c040;color:#1a1a2e}
html.dark-mode .mobile-menu-toggle span{background:#e0e0e0}
/* ===== Header & Navigation ===== */
header{position:fixed;top:0;left:0;width:100%;z-index:1000;transition:background .3s,box-shadow .3s}
header.sticky{background:rgba(26,26,46,.95);backdrop-filter:blur(16px);box-shadow:0 2px 20px rgba(0,0,0,.3)}
.nav-container{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:.75rem 1.25rem;background:rgba(26,26,46,.85);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.1);transition:background .3s}
.logo svg{height:40px;width:auto}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{font-size:.95rem;font-weight:500;padding:.5rem 0;position:relative;transition:color .3s}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#f0c040;transition:width .3s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a:hover{color:#f0c040}
.dark-mode-toggle{font-size:1.2rem;padding:.25rem .5rem;border-radius:8px;transition:background .3s}
.dark-mode-toggle:hover{background:rgba(240,192,64,.2)}
.mobile-menu-toggle{display:none;flex-direction:column;gap:5px;padding:.5rem;border-radius:8px;transition:background .3s}
.mobile-menu-toggle span{display:block;width:28px;height:2.5px;background:#fff;border-radius:2px;transition:transform .3s,opacity .3s}
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
/* ===== Hero ===== */
.hero{display:flex;align-items:center;justify-content:center;min-height:90vh;padding:6rem 1.25rem 4rem;background:linear-gradient(135deg,#1a1a2e,#16213e 50%,#0f3460);position:relative;overflow:hidden;text-align:center;color:#fff}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(240,192,64,.08) 0%,transparent 60%),radial-gradient(circle at 70% 50%,rgba(240,192,64,.05) 0%,transparent 50%);animation:heroGlow 8s ease-in-out infinite alternate}
@keyframes heroGlow{0%{transform:translate(0,0)}100%{transform:translate(-5%,-5%)}}
.hero-content{position:relative;z-index:1;max-width:700px}
.hero-content h1{font-size:clamp(2.2rem,6vw,4rem);margin-bottom:1rem;text-shadow:0 2px 20px rgba(0,0,0,.3)}
.hero-content p{font-size:1.15rem;opacity:.9;margin-bottom:2rem}
.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.btn-primary,.btn-secondary{display:inline-block;padding:.85rem 2.2rem;border-radius:50px;font-weight:600;font-size:1rem;transition:all .3s;position:relative;overflow:hidden}
.btn-primary{background:linear-gradient(135deg,#f0c040,#e6a800);color:#1a1a2e;box-shadow:0 4px 20px rgba(240,192,64,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(240,192,64,.6)}
.btn-secondary{border:2px solid #fff;color:#fff}
.btn-secondary:hover{background:#fff;color:#1a1a2e;transform:translateY(-2px)}
.hero-visual{position:absolute;right:5%;bottom:10%;opacity:.2;pointer-events:none;animation:float 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-20px)}}
/* ===== Cards ===== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:2rem}
.card{background:rgba(255,255,255,.7);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:2rem;transition:all .4s;box-shadow:0 8px 32px rgba(0,0,0,.06);position:relative;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,#f0c040,#e6a800);transform:scaleX(0);transform-origin:left;transition:transform .4s}
.card:hover::before{transform:scaleX(1)}
.card:hover{transform:translateY(-8px);box-shadow:0 16px 48px rgba(0,0,0,.12);background:rgba(255,255,255,.85)}
.card h3{color:#f0c040;margin-bottom:.75rem;font-size:1.3rem}
.card p{color:inherit;opacity:.85;font-size:.95rem;line-height:1.7}
.read-more{display:inline-block;margin-top:1rem;color:#f0c040;font-weight:600;font-size:.9rem;transition:gap .3s;gap:.25rem;display:inline-flex;align-items:center}
.read-more::after{content:'→';transition:transform .3s}
.read-more:hover::after{transform:translateX(4px)}
/* ===== Features ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:2rem;margin-top:2rem}
.feature{text-align:center;padding:2rem 1.5rem;border-radius:16px;background:rgba(240,192,64,.05);border:1px solid rgba(240,192,64,.15);transition:all .4s}
.feature:hover{transform:translateY(-4px);background:rgba(240,192,64,.1);border-color:rgba(240,192,64,.3)}
.feature h3{color:#f0c040;font-size:1.2rem;margin-bottom:.75rem}
.feature p{font-size:.95rem;opacity:.8}
/* ===== HowTo ===== */
.howto{background:rgba(240,192,64,.06);border-radius:16px;padding:2rem;margin:2rem 0;border:1px solid rgba(240,192,64,.15)}
.howto h3{color:#f0c040;margin-bottom:1rem}
.howto ol{padding-left:1.5rem;margin-bottom:1rem}
.howto ol li{margin-bottom:.5rem;line-height:1.7}
.howto p{font-size:.95rem;opacity:.8}
/* ===== FAQ ===== */
.faq{margin-top:2rem}
.faq-item{margin-bottom:.75rem;border-radius:12px;overflow:hidden;border:1px solid rgba(240,192,64,.1)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:1rem 1.5rem;background:rgba(240,192,64,.06);font-weight:600;font-size:1rem;text-align:left;transition:background .3s;border-radius:12px}
.faq-question:hover{background:rgba(240,192,64,.12)}
.faq-question[aria-expanded="true"]{border-radius:12px 12px 0 0}
.faq-icon{font-size:1.3rem;font-weight:300;transition:transform .3s;margin-left:1rem}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;background:rgba(240,192,64,.03);padding:0 1.5rem}
.faq-answer p{padding:.75rem 0;font-size:.95rem;opacity:.85}
/* ===== Contact ===== */
address p{margin-bottom:.5rem;font-size:1rem;display:flex;align-items:center;gap:.5rem}
address p::before{content:'•';color:#f0c040;font-weight:bold}
/* ===== Footer ===== */
footer{background:#1a1a2e;color:#ccc;padding:3rem 0 1.5rem;margin-top:2rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2rem;margin-bottom:2rem}
footer h4{color:#f0c040;margin-bottom:1rem;font-size:1.1rem}
footer ul li{margin-bottom:.5rem}
footer ul li a{opacity:.8;transition:opacity .3s;font-size:.9rem}
footer ul li a:hover{opacity:1;color:#f0c040}
.copyright{text-align:center;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.08);font-size:.85rem;opacity:.6}
/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:2rem;right:2rem;width:48px;height:48px;border-radius:50%;background:#f0c040;color:#1a1a2e;font-size:1.5rem;display:none;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(240,192,64,.4);transition:all .3s;z-index:999}
.back-to-top:hover{transform:translateY(-4px);box-shadow:0 6px 30px rgba(240,192,64,.6)}
/* ===== Scroll Animations ===== */
.section{opacity:0;transform:translateY(40px);animation:fadeUp .8s forwards}
.section:nth-child(1){animation-delay:.1s}
.section:nth-child(2){animation-delay:.2s}
.section:nth-child(3){animation-delay:.3s}
.section:nth-child(4){animation-delay:.4s}
.section:nth-child(5){animation-delay:.5s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.card,.feature{opacity:0;transform:translateY(30px);animation:fadeUp .6s forwards}
.card:nth-child(1),.feature:nth-child(1){animation-delay:.15s}
.card:nth-child(2),.feature:nth-child(2){animation-delay:.25s}
.card:nth-child(3),.feature:nth-child(3){animation-delay:.35s}
.card:nth-child(4),.feature:nth-child(4){animation-delay:.45s}
.card:nth-child(5),.feature:nth-child(5){animation-delay:.55s}
.card:nth-child(6),.feature:nth-child(6){animation-delay:.65s}
/* ===== Responsive ===== */
@media(max-width:768px){
  .nav-links{position:fixed;top:0;right:-100%;width:280px;height:100vh;flex-direction:column;background:rgba(26,26,46,.98);backdrop-filter:blur(20px);padding:5rem 2rem 2rem;gap:1.5rem;transition:right .4s;z-index:999;border-left:1px solid rgba(255,255,255,.1)}
  .nav-links.active{right:0}
  .mobile-menu-toggle{display:flex;z-index:1000}
  .hero{flex-direction:column;text-align:center;padding:5rem 1rem 3rem}
  .hero-visual{display:none}
  .hero-actions{flex-direction:column;align-items:center}
  .btn-primary,.btn-secondary{width:100%;max-width:280px;text-align:center}
  .card-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:2.5rem 0}
  .back-to-top{bottom:1rem;right:1rem;width:40px;height:40px;font-size:1.2rem}
}
@media(max-width:480px){
  .features-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .container{padding:0 1rem}
  h2{font-size:1.5rem}
  .card{padding:1.25rem}
  .faq-question{padding:.75rem 1rem;font-size:.95rem}
}