:root{--primary:#2F6BFF;--primary-light:#6FA3FF;--primary-dark:#1a4cd1;--card-bg:#FFFFFF;--bg:#F4F7FB;--text-main:#1F2D3D;--text-dark:#000000;--border:#D6E2FF;--glow:#A5C4FF;--btn-gradient:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);--btn-gradient-hover:linear-gradient(180deg,#6FA3FF 0%,#2F6BFF 100%);--header-offset:122px;--header-top-bg:#0e2a7a;--header-top-text:#ffffff;--header-nav-bg:#e8eeff;--header-nav-text:#1F2D3D;--header-nav-hover:#2F6BFF;--footer-bg:#1a2744;--footer-text:#c7d4f0;--footer-title:#ffffff;--footer-link:#a7b8dc;--footer-link-hover:#ffffff;--footer-border:#2e4068;--transition-fast:0.2s ease;--transition-slow:0.3s ease;--shadow-header:0 2px 8px rgba(0,0,0,0.15);--shadow-btn:0 2px 6px rgba(47,107,255,0.3)}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif}body{padding-top:var(--header-offset);margin:0;background:#F4F7FB;color:#1F2D3D;overflow-x:hidden}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#ffffff;box-shadow:var(--shadow-header);min-height:auto}.header-top{background:var(--header-top-bg);min-height:68px;display:block}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;min-height:68px;padding-left:30px;padding-right:30px}.logo{font-size:32px;font-weight:900;letter-spacing:0.5px;text-transform:uppercase;color:#ffffff;display:inline-block;cursor:pointer;text-decoration:none;background:linear-gradient(135deg,#ffffff 0%,#6FA3FF 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 0 18px rgba(165,196,255,0.6);padding:4px 0;line-height:1.2;transition:transform 0.2s ease}.logo:hover{transform:scale(1.03);opacity:0.95}.desktop-nav-buttons{display:flex;align-items:center;gap:10px;margin-left:auto}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:none;cursor:pointer;transition:all var(--transition-slow);text-align:center;padding:10px 22px;border-radius:8px;background:var(--btn-gradient);color:#fff;font-size:14px;font-weight:700;letter-spacing:0.3px;box-shadow:var(--shadow-btn);text-transform:uppercase;min-height:38px}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(47,107,255,0.45);background:var(--btn-gradient-hover);color:#ffffff}.btn:active{transform:translateY(0);box-shadow:0 2px 8px rgba(47,107,255,0.3)}.btn-primary{background:var(--btn-gradient);color:#ffffff}.btn-secondary{background:linear-gradient(180deg,#1F2D3D 0%,#2a3b4f 100%);box-shadow:0 2px 6px rgba(0,0,0,0.25);color:#ffffff}.btn-download{background:linear-gradient(180deg,#FF9800 0%,#F57C00 100%);box-shadow:0 2px 8px rgba(255,152,0,0.3);color:#ffffff}.main-nav{background:var(--header-nav-bg);width:100%;min-height:52px;display:flex;align-items:center;position:static;top:auto;left:auto;justify-content:center;transition:height 0.3s ease}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;flex-wrap:wrap;gap:4px;padding:6px 20px;width:100%}.nav-link{display:inline-block;text-decoration:none;color:var(--header-nav-text);font-weight:700;font-size:14px;padding:8px 16px;border-radius:6px;transition:all var(--transition-fast);line-height:1.4;text-align:center;letter-spacing:0.2px}.nav-link:hover{background:var(--header-nav-hover);color:#fff}.nav-link.active-nav{background:var(--header-nav-hover);color:#fff}.mobile-nav-buttons{display:none;width:100%;background:var(--header-top-bg);padding:10px 12px;gap:8px;justify-content:center;flex-wrap:wrap}.mobile-nav-buttons .btn{padding:8px 16px;font-size:13px}.hamburger-menu{display:none;position:fixed;top:14px;left:16px;z-index:1002;background:#ffffff;border:2px solid var(--primary);border-radius:8px;width:32px;height:32px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:7px;padding:0;box-shadow:0 2px 8px rgba(0,0,0,0.15);order:-1;transition:background 0.2s ease}.hamburger-menu span{display:block;width:20px;height:3px;background:var(--primary);border-radius:3px;transition:all 0.3s ease;margin-left:5px}.hamburger-menu.active{background:var(--primary)}.hamburger-menu.active span{background:#ffffff}.hamburger-menu.active span:nth-child(1){transform:translateY(0.5px) rotate(45deg)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-0.5px) rotate(-45deg)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.65);z-index:998;backdrop-filter:blur(2px)}.site-footer{background:var(--footer-bg);color:var(--footer-text);margin-top:40px;padding:40px 0 0;font-size:14px;line-height:1.7}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:30px;padding:20px 30px 30px}.footer-column{padding:0 5px}.footer-column:first-child{margin-top:0}.footer-column h3.footer-title{color:var(--footer-title);font-size:18px;font-weight:700;margin-bottom:16px;padding-bottom:5px;position:relative}.footer-column h3.footer-title:after{display:none}.footer-brand .footer-logo{display:inline-block;font-size:30px;font-weight:900;text-decoration:none;background:linear-gradient(180deg,#ffffff,#B3CCFF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#fff;margin-bottom:10px}.footer-brand .footer-desc{margin-bottom:15px;color:var(--footer-text);text-align:left;opacity:0.9;font-size:14px}.footer-meta{display:flex;gap:12px;flex-wrap:wrap;background:rgba(255,255,255,0.08);padding:8px 6px;border-radius:6px;max-width:100%;margin-top:6px}.footer-meta .footer-meta-item{font-size:12px;color:#d3def2;font-weight:600;border:1px solid rgba(111,163,255,0.3);border-radius:16px;padding:3px 12px;display:inline-block;margin:0;background:var(--primary-light);color:#0e2a7a;text-decoration:none}.footer-meta-item:first-child{color:var(--header-top-bg)}.footer-meta p{padding:2px 6px;background:rgba(255,255,255,0.1)}.footer-column .footer-title{font-size:19px;color:var(--footer-title);font-weight:700;margin:0 0 20px 0;letter-spacing:1px}.footer-column .footer-title::after{content:"";display:block;width:30px;height:3px;background:linear-gradient(90deg,var(--primary),var(--primary-light));border-radius:3px;margin-top:4px}.footer-nav{display:flex;flex-direction:column;gap:8px;align-items:flex-start}.footer-nav .footer-link{color:var(--footer-link);text-decoration:none;font-size:14px;transition:color 0.2s ease,padding-left 0.2s ease;position:relative;line-height:1.6;padding:0}.footer-nav .footer-link:hover{color:var(--footer-link-hover);padding-left:6px;text-decoration:none}.footer-bottom{background:#101b33;padding:14px 0;border-top:1px solid var(--footer-border)}.footer-bottom-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 30px;flex-wrap:wrap;gap:8px}.footer-bottom-container p{font-size:12px;color:rgba(255,255,255,0.5);text-align:center}.copyright-text{color:#ffffff}@media (max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding-left:16px}.nav-container{display:flex;flex-direction:column;align-items:flex-start;background:transparent;flex:1}.btn-desktop{display:none}.site-header-header{background:var(--header-top-bg)}.desktop-nav-buttons{display:none}.header-top{min-height:60px;display:block;background:var(--header-top-bg)}.header-container{justify-content:space-between;min-height:60px;width:100%;max-width:100%;padding-top:10px;padding-bottom:10px;gap:0}.logo{order:0;margin-left:0;font-size:26px;margin-right:0}.main-nav{background:var(--header-nav-bg);min-height:48px;width:auto;height:100vh;display:none;position:fixed;top:60px;left:0;right:auto;bottom:auto;flex-direction:column;align-items:center;justify-content:flex-start;padding:0;z-index:1000;overflow-y:auto;max-width:70%;border-right:2px solid var(--primary);transform:translateX(-100%);transition:transform 0.3s ease-in-out,opacity 0.25s ease-in-out;opacity:0;visibility:hidden;box-shadow:2px 0 20px rgba(0,0,0,0.2)}.main-nav.open,.main-nav.active{display:block;transform:translateX(0);opacity:1;visibility:visible}.main-nav .nav-container{align-items:center;justify-content:center;gap:2px;background:var(--header-nav-bg);padding:12px 10px;margin:0;width:100%;height:100%}.main-nav .nav-link{padding:14px 12px;width:100%;text-align:left;border-radius:0;border-bottom:1px solid rgba(255,255,255,0.15);font-size:14px;color:var(--footer-title)}.main-nav .nav-link:hover{color:var(--header-top-bg);background:#fff}.mobile-nav-buttons{display:flex;background:var(--header-top-bg);z-index:1100;margin-top:0;min-height:48px;align-items:center}.hamburger-menu{display:flex;top:15px;left:16px}.mobile-menu-overlay{display:block;position:fixed;width:100%;height:100%;top:0;left:0}.mobile-menu-overlay.active,.mobile-menu-overlay.open,.mobile-menu-overlay.show{display:visible}.footer-container{grid-template-columns:1fr 1fr;gap:20px;padding:20px 15px}.footer-bottom-container{flex-direction:column;gap:6px;padding:0 15px}.main-nav::-webkit-scrollbar{width:3px;height:auto}.main-nav::-webkit-scrollbar-track{background:#ffffff}.main-nav::-webkit-scrollbar-thumb{background:var(--primary)}}@media (max-width:768px){.page-content img{max-width:100% !important;height:auto !important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.header-title-section,.page-hero-section,.main-banner-section,.video-section,.ranking-section{padding-top:10px !important}}@media (max-width:480px){.nav-container .btn{font-size:13px;color:#1f2d3d}.main-nav .nav-link{font-weight:700;border-bottom:1px solid rgba(47,107,255,0.1)}.header-top .header-container,.main-nav .nav-container{width:100%;max-width:none;padding-left:0;padding-right:0}.logo{font-size:24px}.footer-container{grid-template-columns:1fr}.hamburger-menu{top:16px}.header-top .logo{margin-right:auto;margin-left:20px}.mobile-nav-buttons{gap:4px}.btn{padding:10px 10px;font-size:13px}.main-nav{width:270px}}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}
/* 内容保护（系统追加，请勿删除） */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}