:root{--primary-color:#26A9E0;--accent-color:#FFFFFF;--login-color:#EA7C07;--text-dark:#000000;--text-light:#FFFFFF;--header-offset:122px;}body{padding-top:var(--header-offset);margin:0;font-family:Arial,sans-serif;color:var(--text-dark);overflow-x:hidden;}body.no-scroll{overflow:hidden;}.site-header{position:fixed;top:0;left:0;width:100%;background-color:var(--text-dark);z-index:1000;box-shadow:0 2px 5px rgba(0,0,0,0.2);}.header-top{box-sizing:border-box;min-height:68px;height:68px;display:flex;align-items:center;overflow:hidden;background-color:var(--text-dark);width:100%;}.header-container{box-sizing:border-box;width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 20px;}.logo{font-size:28px;font-weight:bold;color:var(--accent-color);text-decoration:none;line-height:1;display:flex;align-items:center;height:100%;}.logo img{display:block;max-height:60px;height:auto;width:auto;max-width:280px;object-fit:contain;}.desktop-nav-buttons{display:flex;gap:12px;align-items:center;}.mobile-nav-buttons{box-sizing:border-box;display:none;min-height:48px;background-color:var(--primary-color);}.btn{padding:10px 18px;border-radius:5px;text-decoration:none;font-weight:bold;transition:background-color 0.3s ease,transform 0.2s ease;white-space:nowrap;cursor:pointer;border:none;display:inline-flex;align-items:center;justify-content:center;}.btn-login{background-color:var(--login-color);color:var(--accent-color);}.btn-login:hover{background-color:#d16b06;transform:translateY(-1px);}.btn-register{background-color:var(--primary-color);color:var(--accent-color);}.btn-register:hover{background-color:#2095c9;transform:translateY(-1px);}.hamburger-menu{display:none;background:none;border:none;cursor:pointer;padding:0;width:30px;height:24px;position:relative;z-index:1001;}.hamburger-menu span{display:block;width:100%;height:3px;background-color:var(--accent-color);margin-bottom:5px;transition:transform 0.3s ease,opacity 0.3s ease;}.hamburger-menu span:last-child{margin-bottom:0;}.main-nav{box-sizing:border-box;min-height:52px;height:52px;display:flex;align-items:center;overflow:hidden;background-color:var(--primary-color);width:100%;}.nav-container{box-sizing:border-box;height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;width:100%;}.nav-link{color:var(--accent-color);text-decoration:none;padding:10px 15px;font-weight:bold;transition:background-color 0.3s ease;white-space:nowrap;}.nav-link:hover{background-color:rgba(255,255,255,0.2);border-radius:3px;}.overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.7);z-index:999;}.site-footer{background-color:var(--text-dark);color:var(--accent-color);padding:40px 20px 20px;font-size:14px;}.footer-top-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:1200px;margin:0 auto;padding-bottom:30px;}.footer-col h3{color:var(--primary-color);font-size:18px;margin-bottom:15px;}.footer-logo{font-size:24px;font-weight:bold;color:var(--primary-color);text-decoration:none;margin-bottom:15px;display:block;}.footer-description{color:rgba(255,255,255,0.7);line-height:1.6;margin-bottom:15px;word-wrap:break-word;overflow-wrap:break-word;}.footer-nav{list-style:none;padding:0;margin:0;}.footer-nav li{margin-bottom:8px;}.footer-nav a{color:rgba(255,255,255,0.7);text-decoration:none;transition:color 0.3s ease;}.footer-nav a:hover{color:var(--primary-color);}.footer-bottom{max-width:1200px;margin:0 auto;border-top:1px solid rgba(255,255,255,0.1);padding-top:20px;text-align:center;color:rgba(255,255,255,0.6);}.footer-bottom p{margin:0;}@media (max-width:768px){:root{--header-offset:110px;}body{padding-top:var(--header-offset);overflow-x:hidden;}.page-content img{max-width:100% !important;height:auto !important;display:block;}.page-content{overflow-x:hidden;max-width:100%;}.header-top{min-height:60px !important;height:60px !important;}.header-container{width:100%;max-width:none;padding:0 15px;justify-content:space-between;position:relative;}.hamburger-menu{display:block;order:-1;margin-right:auto;}.logo{font-size:24px;flex:1;display:flex !important;justify-content:center !important;align-items:center;height:100%;position:absolute;left:50%;transform:translateX(-50%);max-width:calc(100% - 100px);}.logo img{max-height:56px !important;}.desktop-nav-buttons{display:none !important;}.mobile-nav-buttons{display:flex !important;min-height:48px;align-items:center;justify-content:center;width:100%;max-width:100%;box-sizing:border-box;padding:0 15px;overflow:hidden;gap:10px;flex-wrap:nowrap;background-color:var(--primary-color);}.mobile-nav-buttons .btn{flex:1;min-width:0;max-width:calc(50% - 5px);box-sizing:border-box;padding:8px 12px;font-size:13px;white-space:normal;word-wrap:break-word;overflow-wrap:break-word;}.main-nav{display:none;flex-direction:column;position:fixed;top:var(--header-offset);left:0;width:80%;max-width:300px;height:calc(100% - var(--header-offset));background-color:var(--primary-color);box-shadow:2px 0 5px rgba(0,0,0,0.2);transform:translateX(-100%);transition:transform 0.3s ease;z-index:1001;overflow-y:auto;align-items:flex-start;padding:20px 0;}.main-nav.active{display:flex;transform:translateX(0);}.nav-container{flex-direction:column;align-items:flex-start;padding:0;width:100%;height:auto;max-width:none;}.nav-link{width:100%;padding:12px 20px;text-align:left;border-bottom:1px solid rgba(255,255,255,0.1);}.nav-link:last-child{border-bottom:none;}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg);}.hamburger-menu.active span:nth-child(2){opacity:0;}.hamburger-menu.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}.overlay.active{display:block;}.footer-top-grid{grid-template-columns:1fr;}.footer-col{margin-bottom:20px;}.footer-col:last-child{margin-bottom:0;}}
/* 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;
}