/* Master CSS - Style 9: Glassmorphism Future */
:root{
  --color-primary:#5B7FFF;/* blue */
  --color-secondary:#A78BFA;/* violet */
  --color-accent:#00CED1;/* accent (teal) */
  --color-background:#0b1020;/* deep blue-black */
  --color-surface:rgba(255,255,255,0.08);
  --color-stroke:rgba(255,255,255,0.18);
  --color-text:#EAEAF4;
  --font-primary:'Lato',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  --font-secondary:'Cormorant',Georgia,serif;
  --spacing-xs:.5rem;--spacing-sm:1rem;--spacing-md:1.5rem;--spacing-lg:2rem;--spacing-xl:3rem;
  --radius-sm:8px;--radius-md:16px;--radius-lg:24px;
  --shadow-sm:0 6px 24px rgba(0,0,0,.25);
}
*{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font-primary);color:var(--color-text);background:linear-gradient(180deg,#0b1020,#0a0f1a);line-height:1.65}
body.no-scroll{overflow:hidden}

img{max-width:100%;display:block}
a{color:var(--color-primary);text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}
/* Utilities */
.w-full{width:100%}
.mobile-only{display:none}


/* Typography */
h1{font:700 2.5rem/1.2 var(--font-secondary);letter-spacing:.3px}
h2{font:700 2rem/1.3 var(--font-secondary)}
h3{font:600 1.4rem/1.35 var(--font-primary)}
p{margin:.5rem 0 1rem}
ul{list-style:none}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,15,32,.6);backdrop-filter:blur(16px);border-bottom:1px solid var(--color-stroke)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);min-height:64px}
.main-nav ul{display:flex;gap:var(--spacing-sm);flex-wrap:wrap}
.main-nav a{padding:.5rem .75rem;border-radius:var(--radius-sm)}
.main-nav a:hover{background:var(--color-surface)}
.header-ctas{display:flex;align-items:center;gap:.5rem}
.btn{display:inline-block;padding:.6rem 1rem;border-radius:12px;border:1px solid var(--color-stroke);transition:.2s}
.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;border-color:transparent;box-shadow:0 10px 24px rgba(91,127,255,.25)}
.btn-outline{color:#fff}
.nav-toggle{display:none;background:transparent;color:#fff;font-size:1.5rem;border:0}

/* Nav groups + submenu */
.main-nav ul{gap:var(--spacing-sm);align-items:center}
.main-nav li{position:relative}
.has-submenu> a{display:flex;align-items:center;gap:4px}
.mobile-cta a{display:block;text-align:center;margin:.25rem 0}

.submenu{display:block;position:absolute;top:100%;left:0;background:rgba(10,15,32,.96);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-md);padding:.5rem;min-width:200px;box-shadow:var(--shadow-sm);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(6px);transition:opacity .16s ease,transform .16s ease,visibility .16s}
.submenu li a{display:block;padding:.45rem .7rem;border-radius:var(--radius-sm);color:#fff}
.submenu li a:hover{background:rgba(255,255,255,.08)}
.has-submenu:hover> .submenu{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}

/* Mobile nav */
@media(max-width:768px){
  /* Overlay mobile menu below header */
  .main-nav.open{display:block;position:fixed;top:56px;left:0;right:0;bottom:0;background:rgba(10,15,32,.98);backdrop-filter:blur(10px);border-top:1px solid var(--color-stroke);padding:1rem;overflow:auto;z-index:60}
  .main-nav ul{flex-direction:column;gap:.5rem;align-items:stretch}
  .main-nav a{display:block;padding:.75rem .5rem;border-radius:12px}
  .has-submenu> a{position:relative;font-weight:600}
  .has-submenu> a::after{content:'▾';margin-left:auto;transition:transform .2s}
  .has-submenu.open> a::after{transform:rotate(180deg)}
  /* Mobile: default collapsed */
  .submenu{position:static;display:none;background:transparent;border:0;padding:.25rem 0 .25rem .75rem;box-shadow:none;margin-top:.25rem;opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .has-submenu.open> .submenu{display:block}
  .submenu li a{padding:.45rem .5rem}
}

/* Hero */
.hero-section{position:relative;background:#0d1530 center/cover no-repeat;padding:var(--spacing-xl) 0;border-bottom:1px solid var(--color-stroke)}
.hero-section .container{display:grid;gap:var(--spacing-md)}
.hero-intro{max-width:820px;background:var(--color-surface);backdrop-filter:blur(18px);border:1px solid var(--color-stroke);padding:var(--spacing-md);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}

/* Content block */
.content-block{padding:var(--spacing-xl) 0;border-bottom:1px solid var(--color-stroke)}
.content-block .container{display:grid;grid-template-columns:1.25fr 1fr;gap:var(--spacing-lg);align-items:center}
.content-block.horizontal .block-text{order:1}
.content-block.horizontal .block-image{order:2}
.content-block.vertical .container{grid-template-columns:1fr}
.block-text{background:var(--color-surface);border:1px solid var(--color-stroke);border-radius:var(--radius-md);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}
.block-image picture,img{border-radius:var(--radius-md)}

/* Grid */
.content-grid-section{padding:var(--spacing-xl) 0}
.content-grid{display:grid;gap:var(--spacing-lg)}
.content-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid-item{background:var(--color-surface);border:1px solid var(--color-stroke);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:var(--shadow-sm)}
.grid-item h3{margin:.5rem 0}

/* Footer */
.site-footer{margin-top:var(--spacing-xl);border-top:1px solid var(--color-stroke);background:rgba(10,15,32,.6);backdrop-filter:blur(16px)}
.footer-grid{display:grid;gap:var(--spacing-lg);grid-template-columns:2fr 1.2fr 1fr 1.4fr;padding:var(--spacing-xl) 0}
.payments-list{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}
.footer-legal{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);padding:var(--spacing-md) 0;border-top:1px solid var(--color-stroke)}
.legal-links{display:flex;gap:var(--spacing-sm)}

/* Responsive */
@media(max-width:1024px){.content-block .container{grid-template-columns:1fr}.content-grid.cols-3{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){
  /* 确保移动端菜单覆盖 hero：取消 header 的 backdrop-filter 造成的包含块影响，并提升层级 */
  .site-header{z-index:1000;backdrop-filter:none}
  .main-nav.open{z-index:2000}
}

@media(max-width:768px){.main-nav{display:none}.nav-toggle{display:inline-block}.content-grid.cols-3{grid-template-columns:1fr}.hero-section{padding:var(--spacing-lg) 0}.mobile-only{display:block}.header-ctas .btn{display:none}.logo img{height:44px;width:auto}.header-inner{min-height:56px;gap:.5rem}}