/* ===== Reset & Base ===== */
* {margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial;font-weight:600;}
body {background:#0b1120;color:#e2e8f0;overflow-x:hidden;line-height:1.6;}
a {text-decoration:none;color:inherit;}

/* ===== Header ===== */
header {padding:20px 0;backdrop-filter:blur(10px);background:rgba(15,23,42,0.6);border-bottom:1px solid rgba(255,255,255,0.05);}
.nav {display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:0 20px;}
.logo {font-size:22px;color:#38bdf8;letter-spacing:1px;font-weight:bold;}
.nav-links a {margin-left:24px;font-size:15px;color:#fff;opacity:0.85;transition:0.3s;}
.nav-links a:hover {color:#38bdf8;opacity:1;}
.nav-login a {display:flex;align-items:center;gap:6px;padding:10px 22px;border-radius:10px;background:linear-gradient(90deg,#38bdf8,#6366f1);color:white;transition:0.3s;font-size:14px;font-weight:600;}
.nav-login a:hover {transform:translateY(-2px);box-shadow:0 8px 24px rgba(56,189,248,0.4);}

/* ===== Hero Section ===== */
.hero {position:relative;padding:160px 20px 100px;text-align:center;overflow:hidden;}
.hero-starfield {position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;}
.hero-bg {position:absolute;top:50%;left:50%;width:900px;height:900px;background:radial-gradient(circle, rgba(255,255,255,0.05), transparent 70%);border-radius:50%;z-index:-1;transform:translate(-50%,-50%);animation:rotateBg 30s linear infinite;}
@keyframes rotateBg {0%{transform:translate(-50%,-50%) rotate(0deg);}100%{transform:translate(-50%,-50%) rotate(360deg);}}
.hero-content {position:relative;z-index:2;max-width:900px;margin:0 auto;}
.hero-title {font-size:3.5rem;font-weight:900;letter-spacing:0;display:inline-block;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;}
@media(max-width:768px){.hero-title{font-size:2.2rem;}}@media(max-width:480px){.hero-title{font-size:1.8rem;}}

/* 动态文字 */
.note {display:inline-block;background:linear-gradient(90deg,#38bdf8,#6366f1,#facc15,#38bdf8);background-size:300% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:colorShift 4s linear infinite,floatWave 2s ease-in-out infinite;text-shadow:0 0 4px rgba(56,189,248,0.5);}
@keyframes colorShift {0%{background-position:0% 0;}50%{background-position:100% 0;}100%{background-position:0% 0;}}
@keyframes floatWave {0%,100%{transform:translateY(0);}25%{transform:translateY(-6px);}50%{transform:translateY(6px);}75%{transform:translateY(-3px);}}
.note:nth-child(1){animation-delay:0s;} .note:nth-child(2){animation-delay:0.1s;} .note:nth-child(3){animation-delay:0.2s;} .note:nth-child(4){animation-delay:0.3s;} .note:nth-child(5){animation-delay:0.4s;} .note:nth-child(6){animation-delay:0.5s;}

/* Hero 描述 */
.hero-desc {line-height:1.8em;font-size:1rem;color:#a0aec0;margin:20px 0 40px;max-width:800px;margin-left:auto;margin-right:auto;text-align:center;}
.highlight-ai {color:#38bdf8;font-weight:bold;text-shadow:0 0 8px #38bdf8;}
.highlight-quant {color:#6366f1;font-weight:bold;text-shadow:0 0 8px #6366f1;}

/* 按钮 */
.btn-neon {position:relative;display:inline-block;padding:14px 36px;border-radius:12px;font-weight:700;font-size:16px;color:#fff;background:linear-gradient(90deg,#38bdf8,#6366f1);overflow:hidden;z-index:1;transition:0.3s;text-decoration:none;}
.btn-neon:hover {box-shadow:0 0 18px #38bdf8,0 0 36px #6366f1,0 0 54px #38bdf8;}
.btn-glow {position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle, rgba(56,189,248,0.2), rgba(99,102,241,0.2));animation:btnShine 2.5s infinite linear;pointer-events:none;}
@keyframes btnShine {0%{transform:rotate(0deg);}100%{transform:rotate(360deg);}}

/* Features */
.features {padding:100px 20px;background:rgba(15,23,42,0.3);}
.section-title {text-align:center;margin-bottom:60px;font-size:2rem;font-weight:bold;color:#38bdf8;}
.feature-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:28px;max-width:1200px;margin:0 auto;}
@media(max-width:992px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.feature-grid{grid-template-columns:1fr;}}
.feature-card {background:rgba(30,41,59,0.5);backdrop-filter:blur(12px);padding:28px;border-radius:16px;transition:0.4s;border:1px solid rgba(255,255,255,0.08);opacity:0;transform:translateY(20px);}
.feature-card.visible {opacity:1;transform:translateY(0);}
.feature-card:hover {transform:translateY(-8px);border-color:#38bdf8;box-shadow:0 20px 40px rgba(56,189,248,0.2);}
.feature-card h3 {margin-bottom:14px;font-size:1.2rem;color:#38bdf8;}
.feature-card p {font-size:0.9rem;color:#94a3b8;}

/* Partners */
.partners {padding:80px 20px;background:rgba(15,23,42,0.25);overflow:hidden;}
.partner-slider {overflow:hidden;width:100%;padding:20px 0;background:rgba(15,23,42,0.25);}
.partner-track {display:flex;gap:60px;align-items:center;animation:scrollPartners 30s linear infinite;}
.partner-item {display:flex;flex-direction:column;align-items:center;gap:6px;flex:0 0 auto;}
.partner-item img {height:60px;object-fit:contain;opacity:0.85;transition:transform 0.3s,opacity 0.3s;}
.partner-item img:hover {transform:scale(1.1);opacity:1;}
.partner-item p {font-size:0.85rem;color:#94a3b8;text-align:center;margin:0;}
@keyframes scrollPartners {0%{transform:translateX(0);}100%{transform:translateX(-50%);}}

/* Footer */
footer {padding:40px 20px;text-align:center;font-size:14px;background:rgba(15,23,42,0.7);backdrop-filter:blur(10px);color:#64748b;}

/* Mobile */
@media(max-width:768px){.nav-links,.nav-login{display:none;flex-direction:column;gap:12px;background:rgba(15,23,42,0.95);position:absolute;top:70px;right:20px;padding:20px;border-radius:12px;width:180px;z-index:100;}.nav-links.active,.nav-login.active{display:flex;}.nav-toggle{display:flex;font-size:20px;color:#38bdf8;cursor:pointer;}}
@media(min-width:769px){.nav-toggle{display:none;}}