/* ============================================================
   GLOBAL RESET & VARIABLES
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:#1a2332;background:#fff;line-height:1.7;overflow-x:hidden;
}
img{max-width:100%}
a{color:inherit;text-decoration:none;transition:all .25s}
button{cursor:pointer;font-family:inherit;border:none}

/* ---------- 通用组件 ---------- */
.container{width:min(1200px,92%);margin:0 auto}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.85rem 2rem;border-radius:999px;font-weight:700;
  font-size:.95rem;transition:transform .25s,box-shadow .25s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:#0052FF;color:#fff;box-shadow:0 4px 20px rgba(0,82,255,.3)}
.btn-outline{border:2px solid #0052FF;color:#0052FF;background:transparent}
.btn-white{background:#fff;color:#0052FF}

.section-label{
  text-transform:uppercase;letter-spacing:.18em;
  font-size:.72rem;font-weight:800;opacity:.6;margin-bottom:.5rem;
}
h1,h2,h3,h4{line-height:1.25;font-weight:800}
p{opacity:.85}

/* ---------- HEADER ---------- */
.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  padding:1rem 0;transition:background .3s,box-shadow .3s;
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
}
.site-logo{font-size:1.4rem;font-weight:900;display:flex;align-items:center;gap:.5rem}
.site-logo .cube{
  width:12px;height:12px;background:#0052FF;transform:rotate(45deg);
}
.nav-links{display:flex;gap:2rem;font-size:.9rem;font-weight:600}
.nav-links a{opacity:.75;position:relative}
.nav-links a::after{
  content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;
  background:#0052FF;border-radius:2px;transition:width .3s;
}
.nav-links a:hover::after{width:100%}
.nav-links a.active{opacity:1}
.header-btns{display:flex;gap:.8rem}
.mobile-toggle{display:none;background:none;border:none;font-size:1.6rem;color:#fff}

/* ============================================================
   PAGE #home  ——  分屏视差 · 冰蓝白
   ============================================================ */
body#home{background:#f5f8ff}
body#home .site-header{background:transparent}
body#home .site-header.scrolled{background:rgba(255,255,255,.95);backdrop-filter:blur(12px);box-shadow:0 2px 20px rgba(0,0,0,.08)}
body#home .nav-links a{color:#fff}
body#home .site-header.scrolled .nav-links a{color:#1a2332}
body#home .site-logo{color:#fff}
body#home .site-header.scrolled .site-logo{color:#0052FF}

.hero-split{
  min-height:100vh;display:grid;grid-template-columns:1fr 1fr;
  align-items:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0a1a3a 0%,#1a3a6a 50%,#0052FF 100%);
}
.hero-split::before{
  content:'';position:absolute;width:600px;height:600px;
  background:radial-gradient(circle,rgba(0,82,255,.3) 0%,transparent 70%);
  top:-200px;right:-200px;filter:blur(80px);
}
.hero-text{padding:8rem 4rem 4rem;color:#fff;position:relative;z-index:2}
.hero-text h1{font-size:clamp(2.5rem,5vw,4.5rem);margin-bottom:1.2rem}
.hero-text h1 span{color:#7bb3ff}
.hero-text p{font-size:1.1rem;opacity:.85;max-width:520px;margin-bottom:2.5rem}
.hero-btns{display:flex;gap:1rem;flex-wrap:wrap}
.hero-visual{
  position:relative;display:flex;align-items:center;justify-content:center;
  height:100%;padding:4rem;
}
.floating-shapes{
  position:relative;width:400px;height:400px;
}
.shape{
  position:absolute;border-radius:50%;opacity:.15;
  animation:float 6s ease-in-out infinite;
}
.shape:nth-child(1){width:200px;height:200px;background:#7bb3ff;top:0;left:0;animation-delay:0s}
.shape:nth-child(2){width:150px;height:150px;background:#fff;top:50%;right:0;animation-delay:2s}
.shape:nth-child(3){width:100px;height:100px;background:#7bb3ff;bottom:0;left:30%;animation-delay:4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-20px)}}

/* ---------- 导航介绍区 ---------- */
.nav-showcase{padding:6rem 0;background:#fff}
.nav-showcase h2{text-align:center;font-size:clamp(1.8rem,3vw,2.5rem);margin-bottom:3rem;color:#1a2332}
.nav-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;
}
.nav-showcase-card{
  background:#f8fbff;border-radius:20px;padding:2rem;
  border:1px solid rgba(0,82,255,.08);
  transition:transform .3s,box-shadow .3s;
}
.nav-showcase-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px rgba(0,82,255,.1)}
.nav-showcase-card .icon{
  width:56px;height:56px;border-radius:16px;
  background:linear-gradient(135deg,#0052FF,#7bb3ff);
  display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;color:#fff;margin-bottom:1.2rem;
}
.nav-showcase-card h3{font-size:1.1rem;margin-bottom:.5rem;color:#1a2332}
.nav-showcase-card p{font-size:.9rem;opacity:.65;margin-bottom:1rem}
.nav-showcase-card a{font-weight:700;color:#0052FF;font-size:.9rem}

/* ---------- 特色功能 ---------- */
.features-section{padding:6rem 0;background:#f5f8ff}
.features-section h2{text-align:center;margin-bottom:3rem}
.feature-list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;
}
.feature-item{
  background:#fff;border-radius:18px;padding:2rem;
  box-shadow:0 4px 25px rgba(0,0,0,.04);
}
.feature-item h3{font-size:1.1rem;margin-bottom:.8rem;color:#1a2332}
.feature-item p{font-size:.92rem;opacity:.7}

/* ---------- FAQ ---------- */
.faq-home{padding:6rem 0;background:#fff}
.faq-home h2{text-align:center;margin-bottom:3rem}
.faq-container{max-width:800px;margin:0 auto}
.faq-home details{
  background:#f8fbff;border-radius:12px;margin-bottom:1rem;
  border:1px solid rgba(0,82,255,.08);overflow:hidden;
}
.faq-home summary{
  padding:1.2rem 1.5rem;font-weight:700;cursor:pointer;
  background:#fff;transition:background .2s;
}
.faq-home details[open] summary{background:#f0f5ff}
.faq-home details p{padding:0 1.5rem 1.2rem;opacity:.75;font-size:.95rem}

/* ============================================================
   PAGE #spot  ——  卡片瀑布流 · 深海蓝
   ============================================================ */
body#spot{background:#0a1529;color:#e6edf5}
.spot-hero{
  padding:10rem 0 5rem;
  background:linear-gradient(180deg,#0a1529 0%,#122a4a 100%);
  text-align:center;
}
.spot-hero h1{font-size:clamp(2.2rem,4vw,3.5rem);color:#fff;margin-bottom:1rem}
.spot-hero p{opacity:.7;max-width:600px;margin:0 auto;font-size:1.1rem}

.waterfall-grid{
  column-count:3;column-gap:1.5rem;padding:4rem 0;
}
@media(max-width:1024px){.waterfall-grid{column-count:2}}
@media(max-width:640px){.waterfall-grid{column-count:1}}

.waterfall-card{
  break-inside:avoid;background:#122a4a;border-radius:16px;
  padding:2rem;margin-bottom:1.5rem;border:1px solid rgba(255,255,255,.05);
  transition:transform .3s;
}
.waterfall-card:hover{transform:translateY(-5px)}
.waterfall-card h3{color:#fff;font-size:1.1rem;margin-bottom:.8rem}
.waterfall-card p{font-size:.9rem;opacity:.6;line-height:1.7}
.waterfall-card .tag{
  display:inline-block;padding:.3rem .8rem;border-radius:20px;
  background:rgba(0,82,255,.2);color:#7bb3ff;font-size:.75rem;font-weight:700;
  margin-top:1rem;
}

/* ============================================================
   PAGE #derivatives  ——  全屏横向 · 霓虹蓝
   ============================================================ */
body#derivatives{
  background:#050d1a;color:#e6edf5;
  scroll-snap-type:x mandatory;overflow-x:auto;
  white-space:nowrap;height:100vh;
}
.deriv-section{
  display:inline-flex;align-items:center;justify-content:center;
  width:100vw;height:100vh;scroll-snap-align:start;
  position:relative;padding:4rem;
}
.deriv-section:nth-child(1){background:#050d1a}
.deriv-section:nth-child(2){background:#071227}
.deriv-section:nth-child(3){background:#0a182e}

.deriv-content{
  max-width:600px;text-align:center;white-space:normal;
}
.deriv-content h2{font-size:clamp(2rem,4vw,3.2rem);color:#fff;margin-bottom:1rem}
.deriv-content p{opacity:.7;font-size:1.1rem;margin-bottom:2rem}
.neon-box{
  display:inline-block;padding:2rem 3rem;border:2px solid #0052FF;
  border-radius:20px;background:rgba(0,82,255,.1);
  box-shadow:0 0 40px rgba(0,82,255,.3),inset 0 0 40px rgba(0,82,255,.1);
}
.neon-box h3{color:#7bb3ff;font-size:1.5rem;margin-bottom:.5rem}
.neon-box p{opacity:.8;font-size:1rem}

/* ============================================================
   PAGE #earn  ——  环形时间轴 · 天蓝白
   ============================================================ */
body#earn{background:#f0f7ff;color:#1a2332}
.earn-hero{
  padding:10rem 0 5rem;text-align:center;
  background:linear-gradient(180deg,#e6f0ff 0%,#f0f7ff 100%);
}
.earn-hero h1{font-size:clamp(2.2rem,4vw,3.5rem);margin-bottom:1rem}
.earn-hero p{opacity:.7;max-width:600px;margin:0 auto;font-size:1.1rem}

.circle-timeline{
  position:relative;padding:5rem 0;max-width:800px;margin:0 auto;
}
.circle-timeline::before{
  content:'';position:absolute;left:50%;top:0;bottom:0;
  width:3px;background:linear-gradient(180deg,#0052FF,#7bb3ff);
  transform:translateX(-50%);
}
.circle-item{
  display:flex;align-items:center;margin-bottom:4rem;
  position:relative;
}
.circle-item:nth-child(even){flex-direction:row-reverse}
.circle-item::before{
  content:'';position:absolute;left:50%;top:50%;
  width:24px;height:24px;border-radius:50%;
  background:#0052FF;border:4px solid #fff;
  transform:translate(-50%,-50%);z-index:2;
}
.circle-content{
  width:calc(50% - 40px);background:#fff;border-radius:18px;
  padding:2rem;box-shadow:0 10px 30px rgba(0,0,0,.06);
}
.circle-content h3{color:#0052FF;margin-bottom:.5rem}
.circle-content p{font-size:.95rem;opacity:.7}

/* ============================================================
   PAGE #security  ——  垂直步骤 · 纯白深蓝
   ============================================================ */
body#security{background:#fff;color:#1a2332}
.security-hero{
  padding:10rem 0 5rem;text-align:center;
  background:linear-gradient(180deg,#f5f8ff 0%,#fff 100%);
}
.security-hero h1{font-size:clamp(2.2rem,4vw,3.5rem);margin-bottom:1rem}
.security-hero p{opacity:.7;max-width:600px;margin:0 auto;font-size:1.1rem}

.vertical-steps{max-width:800px;margin:0 auto;padding:5rem 0}
.step-row{
  display:flex;gap:2rem;margin-bottom:3rem;
  position:relative;
}
.step-row:not(:last-child)::after{
  content:'';position:absolute;left:28px;top:60px;
  width:2px;height:calc(100% + 1.5rem);
  background:linear-gradient(180deg,#0052FF,#e6f0ff);
}
.step-number{
  flex-shrink:0;width:56px;height:56px;border-radius:50%;
  background:linear-gradient(135deg,#0052FF,#7bb3ff);
  display:flex;align-items:center;justify-content:center;
  font-weight:900;color:#fff;font-size:1.2rem;
  box-shadow:0 0 0 6px rgba(0,82,255,.1);
}
.step-content h3{font-size:1.2rem;margin-bottom:.5rem}
.step-content p{font-size:.95rem;opacity:.7;line-height:1.8}

/* ---------- FOOTER ---------- */
.site-footer{
  background:#0a1529;color:#8ca0bf;padding:3rem 0;
  text-align:center;font-size:.85rem;
}
.site-footer a{color:#b8c9e8}
.site-footer a:hover{color:#7bb3ff}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .hero-split{grid-template-columns:1fr;text-align:center}
  .hero-text{padding:8rem 2rem 4rem}
  .hero-visual{display:none}
  .mobile-toggle{display:block}
  .nav-links{
    position:fixed;top:0;right:-100%;width:70%;height:100vh;
    flex-direction:column;padding:6rem 2rem;gap:1.5rem;
    background:#0a1529;transition:right .3s;z-index:999;
  }
  .nav-links.open{right:0}
}