:root{--primary:#26A9E0;--secondary:#FFFFFF;--login:#EA7C07;--bg:#FFFFFF;--dark:#000000;--header-offset:122px;--header-top-h:68px;--main-nav-h:52px;--mobile-buttons-h:48px;}*,*::before,*::after{box-sizing:border-box;}html{scroll-behavior:smooth;}body{margin:0;padding-top:var(--header-offset);font-family:'Segoe UI',Roboto,Arial,sans-serif;background:var(--bg);color:#222;overflow-x:hidden;}.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;background:var(--secondary);box-shadow:0 4px 18px rgba(0,0,0,.16);border-bottom:1px solid rgba(38,169,224,.28);}img{max-width:100%;}.header-top{width:100%;height:var(--header-top-h);min-height:var(--header-top-h);display:flex;align-items:center;overflow:hidden;background:linear-gradient(90deg,#0E5C80 0%,#26A9E0 100%);}.header-container{width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding-left:24px;padding-right:24px;gap:14px;}.logo{display:inline-flex;align-items:center;font-size:30px;font-weight:800;letter-spacing:.5px;color:#FFFFFF;text-decoration:none;line-height:1;text-shadow:0 2px 6px rgba(0,0,0,.28);}.logo img{display:block;max-height:60px;height:auto;width:auto;max-width:280px;object-fit:contain;}.desktop-nav-buttons{display:flex;align-items:center;gap:10px;}.mobile-nav-buttons{display:none;min-height:var(--mobile-buttons-h);}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 22px;border-radius:8px;font-size:15px;font-weight:700;text-decoration:none;letter-spacing:.2px;cursor:pointer;border:2px solid transparent;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;white-space:nowrap;line-height:1.2;}.btn:hover{transform:translateY(-2px);}.btn-login{background:var(--login);color:#FFFFFF;box-shadow:0 4px 14px rgba(234,124,7,.45);}.btn-login:hover{background:#CF6C02;box-shadow:0 6px 18px rgba(234,124,7,.6);}.btn-register{background:linear-gradient(135deg,#26A9E0 0%,#0E7FB0 100%);color:#FFFFFF;box-shadow:0 4px 14px rgba(38,169,224,.45);}.btn-register:hover{background:linear-gradient(135deg,#0E7FB0 0%,#0A5F85 100%);box-shadow:0 6px 18px rgba(38,169,224,.6);}.main-nav{width:100%;height:var(--main-nav-h);min-height:var(--main-nav-h);display:flex;align-items:center;overflow:hidden;background:#FFFFFF;border-top:1px solid rgba(38,169,224,.2);}.nav-container{width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;gap:4px;padding:0 20px;}.nav-link{display:inline-flex;align-items:center;height:100%;padding:0 12px;font-size:14px;font-weight:600;color:#0E5C80;text-decoration:none;position:relative;transition:color .2s ease,background .2s ease;white-space:nowrap;}.nav-link::after{content:'';position:absolute;left:12px;right:12px;bottom:6px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:center;transition:transform .25s ease;}.nav-link:hover,.nav-link.active{color:var(--primary);}.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}.hamburger-menu{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;padding:0;border:none;border-radius:8px;background:rgba(255,255,255,.16);cursor:pointer;z-index:1001;transition:background .2s ease;}.hamburger-menu:hover{background:rgba(255,255,255,.3);}.hamburger-menu span{display:block;width:24px;height:3px;border-radius:2px;background:#FFFFFF;transition:transform .3s ease,opacity .3s ease;}.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);}.nav-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:999;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;}.nav-overlay.active{display:block;opacity:1;visibility:visible;}.site-footer{background:linear-gradient(180deg,#0B3F57 0%,#062938 100%);color:#D6E6EE;padding:48px 20px 0;margin-top:40px;}.footer-top-row-1{max-width:1200px;margin:0 auto 24px;}.footer-top-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.14);}.footer-col{min-width:0;}.footer-about{display:flex;flex-direction:column;gap:14px;}.footer-logo{display:inline-block;font-size:28px;font-weight:800;letter-spacing:.5px;color:#FFFFFF;text-decoration:none;line-height:1;align-self:flex-start;}.footer-description{margin:0;font-size:14px;line-height:1.7;color:#BFD8E5;word-wrap:break-word;overflow-wrap:break-word;}.footer-heading{margin:0 0 14px;font-size:16px;font-weight:700;color:#FFFFFF;letter-spacing:.3px;position:relative;padding-bottom:8px;}.footer-heading::after{content:'';position:absolute;left:0;bottom:0;width:36px;height:2px;border-radius:2px;background:var(--primary);}.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}.footer-nav a{color:#BFD8E5;text-decoration:none;font-size:14px;line-height:1.5;transition:color .2s ease,padding-left .2s ease;display:inline-block;}.footer-nav a:hover{color:#FFFFFF;padding-left:4px;}.footer-dynamic-col{display:flex;flex-direction:column;min-height:1px;}.footer-slot-anchor-inner{display:block;min-height:1px;}.footer-mid{max-width:1200px;margin:0 auto;padding:24px 0;}.footer-mid-anchor{display:block;min-height:1px;}.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:16px;}.footer-slot-anchor-inner{display:block;min-height:1px;width:100%;}.footer-bottom-anchor{max-width:1200px;margin:0 auto;display:block;min-height:1px;}.footer-bottom{max-width:1200px;margin:0 auto;border-top:1px solid rgba(255,255,255,.14);padding:18px 0 22px;text-align:center;}.footer-bottom p{margin:0;font-size:13px;color:#9FC2D3;line-height:1.6;}@media (max-width:768px){:root{--header-offset:110px;--header-top-h:60px;--main-nav-h:48px;}.header-top{height:60px;min-height:60px;}.header-container{width:100%;max-width:none;padding-left:12px;padding-right:12px;gap:8px;position:relative;}.logo{flex:1;display:flex;justify-content:center;align-items:center;font-size:24px;}.logo img{display:block;max-width:100%;height:auto;max-height:56px;}.hamburger-menu{display:flex;flex:0 0 auto;}.desktop-nav-buttons{display:none !important;}.mobile-nav-buttons{display:flex !important;align-items:center;justify-content:center;width:100%;max-width:100%;box-sizing:border-box;padding:6px 12px;overflow:hidden;gap:10px;flex-wrap:nowrap;background:#FFFFFF;border-bottom:1px solid rgba(38,169,224,.2);min-height:48px;}.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;border-radius:6px;}.main-nav{display:none;position:fixed;top:0;left:0;width:82%;max-width:320px;height:100vh;min-height:100vh;flex-direction:column;background:#0B3F57;z-index:1000;transform:translateX(-100%);transition:transform .3s ease;box-shadow:4px 0 24px rgba(0,0,0,.4);overflow-y:auto;}.main-nav.active{display:flex;transform:translateX(0);}.nav-container{width:100%;max-width:none;height:auto;flex-direction:column;justify-content:flex-start;align-items:stretch;padding:76px 0 24px;gap:0;}.nav-link{width:100%;height:auto;padding:14px 22px;font-size:15px;color:#E3F1F7;border-bottom:1px solid rgba(255,255,255,.1);}.nav-link::after{display:none;}.nav-link:hover,.nav-link.active{background:rgba(38,169,224,.25);color:#FFFFFF;}.footer-top-grid{grid-template-columns:1fr;gap:22px;}.footer-mid-grid{grid-template-columns:1fr;gap:14px;}.site-footer{padding:36px 16px 0;}.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;
}