:root{--header-offset:122px;--primary:#26A9E0;--primary-dark:#1a7ba6;--primary-light:#e6f4fb;--accent:#EA7C07;--bg:#FFFFFF;--text:#000000;--text-light:#333333;--shadow:0 4px 15px rgba(0,0,0,0.12)}*{margin:0;padding:0;box-sizing:border-box}body{padding-top:var(--header-offset);font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden}.btn{display:inline-block;padding:10px 22px;font-size:15px;font-weight:700;border-radius:6px;text-decoration:none!important;line-height:1.4;transition:all .3s ease;white-space:nowrap;border:2px solid transparent}.btn-login{background:var(--accent);color:#fff!important;border-color:#c86905}.btn-login:hover{background:#d47106;transform:translateY(-2px);box-shadow:0 4px 12px rgba(234,124,7,.4)}.btn-register{background:var(--primary);color:#fff!important;border-color:var(--primary-dark)}.btn-register:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 4px 12px rgba(38,169,224,.4)}.btn-download{background:#fff;color:var(--primary-dark)!important;border-color:var(--primary)}.btn-download:hover{background:var(--primary-light);transform:translateY(-2px)}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:var(--bg);box-shadow:var(--shadow);min-height:auto}.header-top{width:100%;background:var(--primary-dark)}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 30px;gap:15px;min-height:68px}.logo{display:inline-block;font-size:26px;font-weight:800;color:#fff!important;text-decoration:none!important;text-transform:lowercase;letter-spacing:1px;text-shadow:0 2px 4px rgba(0,0,0,.2);line-height:1.2}.desktop-nav-buttons{display:flex;gap:10px;align-items:center}.header-bottom{width:100%;background:#fff;display:flex;align-items:center}.main-nav{display:flex;flex:1;background:#fff}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;gap:4px;padding:6px 20px;flex-wrap:nowrap;width:100%}.nav-container a{display:inline-block;padding:8px 12px;font-size:14px;font-weight:600;color:var(--text);text-decoration:none!important;border-radius:4px;transition:background .3s,color .3s;white-space:nowrap;text-transform:lowercase}.nav-container a:first-child{color:var(--primary);font-weight:700}.nav-container a:hover{background:var(--primary-light);color:var(--primary-dark)}.hamburger-menu{display:none;background:none;border:none;width:42px;height:42px;padding:10px;cursor:pointer;flex-direction:column;justify-content:space-between;align-items:center}.hamburger-menu span{display:block;width:100%;height:3px;background:var(--primary-dark);border-radius:3px;transition:all .3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(12px) rotate(45deg);background:var(--accent)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-12px) rotate(-45deg);background:var(--accent)}.mobile-nav-buttons{display:none}.mobile-menu-overlay{display:none}.site-footer{background:#1a1a2e;color:#b8c7d9;padding:55px 20px 0;margin-top:50px}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1.2fr;gap:40px;padding-bottom:40px}.footer-brand .footer-logo{font-size:24px;font-weight:800;color:#fff!important;text-decoration:none!important;text-transform:lowercase;display:block;margin-bottom:16px}.footer-brand p{color:#8e9fb1;font-size:14px;line-height:1.8;max-width:340px}.footer-column h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:18px;position:relative;padding-bottom:8px}.footer-column h4::after{content:'';position:absolute;bottom:0;left:0;width:36px;height:3px;background:var(--primary);border-radius:4px}.footer-nav{display:flex;flex-direction:column;gap:10px}.footer-nav a{color:#b8c7d9;text-decoration:none!important;font-size:14px;transition:color .3s,padding-left .3s}.footer-nav a:hover{color:var(--primary);padding-left:4px}.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);text-align:center;padding:20px 0;color:#7a8b9f;font-size:13px}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding:8px 15px;min-height:60px;justify-content:space-between;position:relative}.logo{font-size:20px}.desktop-nav-buttons{display:none}.hamburger-menu{display:flex;order:-1;margin-left:0;flex-shrink:0}.header-bottom{flex-wrap:wrap;background:#fff}.main-nav{display:none;position:fixed;top:0;left:0;bottom:0;width:280px;max-width:82%;background:#fff;z-index:1200;transform:translateX(-100%);transition:transform .35s ease;flex-direction:column;overflow-y:auto;box-shadow:2px 0 25px rgba(0,0,0,0.18)}.main-nav.active{display:block;transform:translateX(0)}.nav-container{width:100%;max-width:none;flex-direction:column;justify-content:flex-start;align-items:flex-start;padding:80px 15px 30px;gap:2px}.nav-container a{display:block;width:100%;padding:13px 10px;font-size:15px;border-bottom:1px solid #f0f0f0;text-align:left}.mobile-nav-buttons{display:flex;width:100%;padding:6px 15px 10px;gap:6px;justify-content:center;background:#fff;border-top:1px solid #f0f0f0}.mobile-nav-buttons .btn{padding:8px 12px;font-size:13px;flex:1;text-align:center}.mobile-menu-overlay{display:block;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:1100;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease}.mobile-menu-overlay.active{opacity:1;visibility:visible}.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-container{grid-template-columns:1fr;gap:30px;text-align:center}.footer-brand .footer-logo{margin-left:auto;margin-right:auto}.footer-brand p{max-width:100%;margin:0 auto}.footer-column h4::after{left:50%;transform:translateX(-50%)}.footer-nav a:hover{padding-left:0}}.site-footer .btn{display:none}
/* 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;
}