.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#1F2D3D;box-shadow:0 4px 20px rgba(0,0,0,.25)}.header-top{width:100%;background:linear-gradient(135deg,#1a237e,#2F6BFF);border-bottom:2px solid #A5C4FF}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 24px;min-height:68px}.logo{font-size:1.35rem;font-weight:800;color:#fff;text-decoration:none;display:inline-block;letter-spacing:.5px;line-height:1.6;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.logo:hover{color:#fff;text-decoration:none}.desktop-nav-buttons{display:flex;align-items:center;gap:10px}.btn{display:inline-flex;text-decoration:none;padding:9px 18px;border-radius:6px;font-weight:700;transition:all .25s ease;align-items:center;justify-content:center;line-height:1.4;white-space:nowrap}.btn-download,.btn-register,.btn-login{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#fff;border:2px solid #6FA3FF;box-shadow:0 2px 8px rgba(0,0,0,.2)}.btn-download{border-color:#A5C4FF;background:linear-gradient(135deg,#6FA3FF,#2F6BFF)}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(47,107,255,.4);text-decoration:none;border-color:#fff}.mobile-header-actions{display:none}.main-nav{width:100%;background:#fff;border-bottom:1px solid #D6E2FF;position:static;display:flex;min-height:52px}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 10px;gap:2px;width:100%}.nav-link{display:inline-block;padding:12px 12px;color:#1F2D3D;font-weight:600;font-size:.95rem;text-decoration:none;border-bottom:3px solid transparent;transition:color .2s ease,border-color .2s ease,background .2s ease;line-height:1.4}.nav-link:hover{color:#2F6BFF;text-decoration:none;border-bottom-color:#2F6BFF;background:#f0f4ff}.nav-link.active{color:#2F6BFF;border-bottom-color:#2F6BFF}.mobile-nav-buttons{display:none}.mobile-menu-overlay{display:none}.page-content img,.site-content img,.footer-content img{max-width:100%;height:auto}.site-footer{background:#1F2D3D;color:#fff;margin-top:40px;padding:20px 0 0;border-top:4px solid #2F6BFF;width:100%}.footer-container{max-width:1200px;margin:0 auto;padding:30px 20px 0}.footer-grid{display:grid;grid-template-columns:1.6fr .9fr .9fr;gap:30px;padding-bottom:25px}.footer-brand .footer-logo{font-size:1.6rem;font-weight:800;color:#fff;text-decoration:none;display:inline-block;margin-bottom:12px}.footer-desc{color:rgba(255,255,255,.8);font-size:.95rem;margin:0 0 20px;line-height:1.7}.btn-footer-register{background:linear-gradient(135deg,#4A8BFF,#2F6BFF);color:#fff;padding:11px 30px}.btn-footer-register:hover,.btn-footer-register:focus{background:linear-gradient(135deg,#2F6BFF,#1a237e);color:#fff;text-decoration:none}.footer-heading{color:#fff;font-size:1.1rem;font-weight:700;margin-bottom:15px;border-bottom:2px solid #6FA3FF;padding-bottom:8px;display:inline-block}.footer-links{list-style:none;padding:0;margin:0}.footer-link{color:rgba(255,255,255,.85);font-size:.95rem;text-decoration:none;padding:5px 0;display:inline-block;transition:color .2s ease,padding-left .2s ease}.footer-link:hover{color:#2F6BFF;text-decoration:none;padding-left:5px}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}.footer-copyright{font-size:.9rem;color:rgba(255,255,255,.75);margin:0}.footer-home-link{color:#fff;font-size:.9rem;text-decoration:none;font-weight:600}.footer-home-link:hover{color:#6FA3FF;text-decoration:none}:root{--header-offset:122px}body{padding-top:var(--header-offset);margin:0;background-color:#F4F7FB;color:#1F2D3D;font-family:Arial,Helvetica,sans-serif}.site-header .logo,.site-header .mobile-logo{color:#fff}.btn,.nav-link,.footer-link,.footer-logo,.footer-home-link,.footer-copyright{color:#fff}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding:0 15px;min-height:60px;justify-content:space-between}.desktop-nav-buttons{display:none}.mobile-header-actions{display:flex;align-items:center;width:100%;justify-content:space-between}.hamburger-menu{background:transparent;border:none;cursor:pointer;padding:8px;display:flex;flex-direction:column;gap:5px;z-index:1002;order:0}.hamburger-menu .bar{display:block;width:26px;height:3px;background:#fff;border-radius:2px;transition:all .3s ease}.hamburger-menu.active .bar:nth-child(1){transform:translateY(8px) rotate(45deg)}.hamburger-menu.active .bar:nth-child(2){opacity:0}.hamburger-menu.active .bar:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.mobile-logo{font-size:1.3rem;font-weight:800;color:#fff !important;text-decoration:none;flex:1;text-align:center;margin:0 10px;display:block;order:1}.header-spacer{width:42px;display:block;order:2}.mobile-nav-buttons{display:flex;justify-content:center;gap:8px;padding:8px 15px;background:#1a237e;width:100%;flex-wrap:wrap}.mobile-nav-buttons .btn{padding:8px 12px;font-size:.85rem;flex:1;min-width:90px;max-width:130px}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:999}.mobile-menu-overlay.active{display:block}.main-nav{display:none;flex-direction:column;position:fixed;top:0;left:0;width:80%;max-width:340px;height:100%;background:#fff;transform:translateX(-100%);transition:transform .3s ease;z-index:1001;border-right:1px solid #D6E2FF;box-shadow:4px 0 20px rgba(0,0,0,.2)}.main-nav.active{display:flex;transform:translateX(0);flex-direction:column;top:72px;height:auto;min-height:0;width:100%;max-width:100%;border-right:none;box-shadow:0 8px 16px rgba(0,0,0,.15)}.motor-nav.active{top:60px}.nav-container{flex-direction:column;align-items:flex-start;padding:8px 0;width:100%}.nav-link{width:100%;padding:12px 24px;border-bottom:1px solid rgba(214,226,255,.6);color:#1F2D3D;font-size:.95rem}.nav-link:hover{background:#f0f4ff;border-bottom-color:transparent}.nav-link.active{border-bottom:1px solid rgba(214,226,255,.6);background:#eef2ff}.site-footer{padding:10px 0 0}.footer-grid{grid-template-columns:1fr;gap:20px;text-align:left}.footer-brand,.footer-column{width:100%}.page-content img{max-width:100% !important;height:auto !important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.footer-bottom{flex-direction:row;align-items:center}}body.mobile-menu-open{overflow:hidden}.site-header::after{content:'';display:table;clear:both}.site-header .logo,.site-header .mobile-logo{color:#ffffff !important}
/* 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;
}