:root{--primary:#E53935;--secondary:#FF5A4F;--header-offset:122px;--text-main:#333333;--bg-card:#ffffff;--bg-body:#F5F7FA;--border:#E0E0E0}*{margin:0;padding:0;box-sizing:border-box}body{padding-top:var(--header-offset);background-color:var(--bg-body);color:var(--text-main);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;overflow-x:hidden}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background-color:var(--bg-card);box-shadow:0 4px 20px rgba(0,0,0,0.08),0 1px 3px rgba(0,0,0,0.12);min-height:auto;display:flex;flex-direction:column}.header-top{background:linear-gradient(135deg,#c62828 0%,#b71c1c 100%);width:100%;border-bottom:2px solid var(--secondary)}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 20px;min-height:68px;width:100%}.logo{font-size:28px;font-weight:900;color:#ffffff;text-decoration:none;letter-spacing:1px;text-shadow:0 2px 4px rgba(0,0,0,0.3);display:inline-block;padding:8px 0;text-transform:lowercase}.desktop-nav-buttons{display:flex;gap:12px;padding:10px 0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:50px;font-size:15px;font-weight:700;text-decoration:none;border:none;cursor:pointer;transition:all 0.3s ease;box-shadow:0 4px 12px rgba(0,0,0,0.2);letter-spacing:0.3px}.btn-register{background:linear-gradient(180deg,#FF5A4F 0%,#E53935 100%);color:#ffffff}.btn-register:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(229,57,53,0.4)}.btn-login{background:#ffffff;color:var(--primary);border:2px solid var(--primary)}.btn-login:hover{background:var(--primary);color:#ffffff;transform:translateY(-2px)}.main-nav{background:var(--bg-card);width:100%;display:flex;border-top:1px solid rgba(0,0,0,0.05)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;flex-wrap:wrap;min-height:52px;width:100%}.nav-link{color:#555555;text-decoration:none;padding:12px 16px;font-size:14px;font-weight:700;white-space:nowrap;text-transform:uppercase;letter-spacing:0.5px;transition:color 0.3s ease;position:relative}.nav-link:after{content:'';display:block;width:0;height:2px;background:var(--primary);position:absolute;bottom:6px;left:50%;transform:translateX(-50%);transition:width 0.3s ease}.nav-link:hover{color:var(--primary)}.nav-link:hover:after{width:80%}.hamburger-menu{display:none}.mobile-nav-buttons{display:none}.mobile-menu-overlay{display:none}.site-footer{background:#1a1a2e;color:#ffffff;padding-top:40px;margin-top:auto}.footer-container{max-width:1200px;margin:0 auto;padding:0 20px 20px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}.footer-logo{font-size:30px;font-weight:900;color:#ffffff;text-decoration:none;display:inline-block;margin-bottom:12px;text-shadow:0 2px 4px rgba(229,57,53,0.3)}.footer-desc{color:#b0b0b0;font-size:14px;line-height:1.6;max-width:250px}.footer-title{color:#ffffff;font-size:16px;font-weight:700;margin-bottom:16px;position:relative;padding-bottom:8px}.footer-title:after{content:'';display:block;width:30px;height:3px;background:linear-gradient(90deg,var(--primary),var(--secondary));position:absolute;bottom:0;left:0;border-radius:2px}.footer-links{list-style:none;margin:0;padding:0}.footer-links li{margin-bottom:8px}.footer-links a{color:#cccccc;text-decoration:none;font-size:14px;transition:color 0.3s ease,padding-left 0.3s ease;display:inline-block;padding-left:0}.footer-links a:hover{color:var(--secondary);padding-left:8px}.footer-bottom{background:#11111f;text-align:center;padding:18px 20px;border-top:1px solid #2a2a4a}.footer-bottom p{color:#999999;font-size:14px}.page-content{padding:20px;max-width:1200px;margin:0 auto}.page-content img{max-width:100%;height:auto}.page-content{overflow-x:hidden;max-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}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;min-height:60px}.logo{font-size:24px;padding:6px 0}.desktop-nav-buttons{display:none}.mobile-nav-buttons{display:flex;justify-content:center;gap:10px;padding:8px 15px;background:linear-gradient(135deg,#c62828 0%,#b71c1c 100%);width:100%;border-top:1px solid rgba(255,255,255,0.15);min-height:48px;z-index:1000}.mobile-nav-buttons .btn{padding:8px 20px;font-size:14px}.main-nav{display:none;position:fixed;top:0;left:0;width:280px;height:100vh;background:var(--bg-card);flex-direction:column;transform:translateX(-100%);transition:transform 0.3s ease;z-index:2000;box-shadow:2px 0 20px rgba(0,0,0,0.2);justify-content:flex-start;padding:20px 0;overflow-y:auto}.main-nav.active{transition:transform 0.3s ease;display:flex!important;transform:translateX(0)}.nav-container{width:100%;max-width:none;flex-direction:column;justify-content:flex-start;padding:20px;gap:5px}.nav-link{padding:14px 16px;font-size:15px;width:100%;text-align:center}.hamburger-menu{display:flex;flex-direction:column;position:absolute;top:15px;left:15px;z-index:3000;cursor:pointer;padding:8px;background:transparent;border:none}.hamburger-menu span{display:block;width:24px;height:3px;background:#ffffff;border-radius:3px;margin:3px 0;transition:all 0.3s ease;box-shadow:0 1px 2px rgba(0,0,0,0.2)}.hamburger-menu.active span:nth-child(1){transform:translateY(6px) rotate(45deg);background:var(--primary)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);background:var(--primary)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:1500;cursor:pointer}.mobile-menu-overlay.active{display:block}.site-header{padding-top:0}.header-top .header-container{position:relative;justify-content:center}.header-top .mobile-nav-buttons{width:100%;order:3}.desktop-nav-buttons{display:none}.logo{position:relative;z-index:2001}.footer-container{grid-template-columns:1fr;gap:30px}.page-content{padding:10px;max-width:100%}}@media(min-width:769px){.hamburger-menu{display:none}.mobile-nav-buttons{display:none}.main-nav{position:relative;transform:none}.main-nav.active{transform:none}.mobile-menu-overlay{display:none!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;
}