.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;box-shadow:0 4px 20px rgba(0,0,0,0.45);background:#08160F;font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif}.header-top{background:linear-gradient(135deg,#0A4B2C 0%,#11271B 100%);width:100%;border-bottom:1px solid #1E3A2A}.header-container{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding-left:24px;padding-right:24px;min-height:68px;position:relative}.logo{font-size:32px;font-weight:800;color:#F2C14E;text-decoration:none;letter-spacing:1px;text-shadow:0 0 12px rgba(242,193,78,0.3);line-height:1.2;white-space:nowrap}.logo:hover{color:#57E38D;text-shadow:0 0 16px rgba(87,227,141,0.4)}.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;padding:9px 20px;border-radius:8px;font-size:14px;font-weight:700;transition:all 0.3s ease;cursor:pointer;border:none;line-height:1.4;white-space:nowrap}.btn-register{background:linear-gradient(180deg,#F2C14E 0%,#D69E2E 100%);color:#08160F;box-shadow:0 2px 8px rgba(242,193,78,0.3)}.btn-register:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(242,193,78,0.5)}.btn-login{background:linear-gradient(180deg,#2AD16F 0%,#13994A 100%);color:#F2FFF6;box-shadow:0 2px 8px rgba(42,209,111,0.3)}.btn-login:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(42,209,111,0.5)}.btn-download{background:transparent;color:#F2FFF6;border:2px solid #2E7A4E;box-shadow:none}.btn-download:hover{background:#11271B;border-color:#57E38D;color:#57E38D}.hamburger-menu{display:none;background:transparent;border:none;cursor:pointer;padding:8px;margin-right:auto;z-index:1002;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px}.hamburger-line{display:block;width:24px;height:2px;background:#F2FFF6;border-radius:2px;transition:all 0.3s ease}.hamburger-menu.active .hamburger-line:nth-child(1){transform:translateY(7px) rotate(45deg)}.hamburger-menu.active .hamburger-line:nth-child(2){opacity:0}.hamburger-menu.active .hamburger-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.main-nav{background:linear-gradient(180deg,#11271B 0%,#08160F 100%);width:100%;display:flex;border-top:1px solid #1E3A2A}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 16px;min-height:52px;width:100%}.nav-link{display:inline-block;padding:12px 16px;color:#A7D9B8;text-decoration:none;font-size:15px;font-weight:600;transition:color 0.3s ease;border-bottom:2px solid transparent}.nav-link:hover{color:#57E38D;border-bottom-color:#57E38D}.mobile-nav-buttons{display:none;background:#0A4B2C;border-top:1px solid #1E3A2A;padding:8px 12px;justify-content:center;gap:8px;flex-wrap:wrap}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:998;opacity:0;transition:opacity 0.3s ease;backdrop-filter:blur(2px)}.mobile-menu-overlay.active{display:block;opacity:1}@media (min-width:769px){.main-nav{display:flex!important}.mobile-nav-buttons{display:none!important}}@media (max-width:768px){.header-container{width:100%;max-width:none;min-height:60px;padding-left:16px;padding-right:16px}.hamburger-menu{display:flex;order:0}.logo{order:1;font-size:26px}.desktop-nav-buttons{display:none}.mobile-nav-buttons{display:flex;position:relative;z-index:997}.btn{padding:8px 16px;font-size:13px;flex:1;max-width:160px}.main-nav{display:none;position:fixed;top:auto;left:0;width:85%;max-width:340px;height:calc(100% - 140px);background:#08160F;flex-direction:column;justify-content:flex-start;align-items:stretch;z-index:999;border-right:1px solid #2E7A4E;border-top:1px solid #2E7A4E;box-shadow:4px 0 20px rgba(0,0,0,0.5);transition:transform 0.3s ease;transform:translateX(-100%);overflow-y:auto}.main-nav.active{display:flex;transform:translateX(0)}.nav-container{flex-direction:column;justify-content:flex-start;align-items:center;width:100%;max-width:none;padding:20px 0}.nav-link{width:100%;text-align:center;padding:14px 20px;font-size:16px;border-bottom:1px solid #1E3A2A}.mobile-nav-buttons{width:100%;display:flex !important}}body{padding-top:var(--header-offset,120px)}:root{--header-offset:120px}@media (max-width:768px){:root{--header-offset:108px}.site-header{min-height:auto}.header-top{min-height:60px}.main-nav{display:none}.main-nav.active{display:flex}.mobile-menu-overlay.active{display:block}.page-content img{max-width:100%!important;height:auto!important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}}
/* 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;
}