.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15); background-color: #26A9E0; min-height: auto; font-family: 'Nunito Sans', 'Be Vietnam Pro', Tahoma, sans-serif; }
.header-top { background-color: #156d96; width: 100%; }
.header-container { max-width: 1200px; min-height: 68px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 24px; padding-right: 24px; gap: 12px; width: 100%; box-sizing: border-box; }
.logo { color: #FFFFFF; font-size: 32px; font-weight: 900; text-decoration: none; letter-spacing: -0.5px; line-height: 1.2; display: inline-block; white-space: nowrap; font-style: italic; text-shadow: 0 2px 6px rgba(0, 0, 0, 0.2); }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 8px 14px; border-radius: 6px; font-weight: 700; font-size: 14px; text-decoration: none; transition: all 0.2s ease; border: none; cursor: pointer; line-height: 1.2; min-height: 36px; box-sizing: border-box; }
.btn-download { background-color: #FFFFFF; color: #156d96; border: 1px solid #FFFFFF; }
.btn-download:hover { background-color: #f0f0f0; color: #0d4b68; }
.btn-login { background-color: #EA7C07; color: #FFFFFF; }
.btn-login:hover { background-color: #d06c00; }
.btn-register { background-color: #FFD200; color: #2B2B2B; }
.btn-register:hover { background-color: #e6bc00; }
.btn-download { background-color: #FFFFFF; color: #156d96; }
.header-bottom { background-color: #FFFFFF; border-top: 1px solid #c9e3f0; width: 100%; }
.header-bottom .header-bottom-container { min-height: 52px; position: relative; }
.main-nav { display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 4px; }
.main-nav a { color: #2797c4; text-decoration: none; padding: 8px 12px; border-radius: 4px; font-size: 14.5px; font-weight: 600; transition: background-color 0.2s, color 0.2s; display: inline-block; white-space: nowrap; line-height: 1.4; }
.main-nav a:hover { background-color: #e0f0f7; color: #0e5a7a; text-decoration: none; }
.hamburger-menu { display: none; background: none; border: none; width: 40px; height: 40px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; padding: 0; cursor: pointer; z-index: 1002; }
.bar { display: block; width: 24px; height: 3px; background-color: #FFFFFF; border-radius: 2px; transition: all 0.3s ease-in-out; }
.hamburger-menu.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
.hamburger-menu.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.mobile-nav-buttons { display: none; }
.mobile-menu-overlay { display: none; }
.btn-mobile { display: none; }
.site-footer { background-color: #0f2d3f; color: #CCE2F0; font-family: 'Nunito Sans', sans-serif; padding: 50px 0 0 0; margin-top: 0; border-top: 4px solid #EA7C07; font-size: 14px; line-height: 1.6; }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 0 16px; display: grid; grid-template-columns: 1.2fr 1fr 1.1fr; gap: 30px; }
.footer-column h4 { color: #FFFFFF; font-size: 17px; margin-bottom: 20px; font-weight: 700; position: relative; padding-bottom: 8px; }
.footer-column h4::after { content: ""; display: block; width: 35px; height: 2px; background-color: #EA7C07; margin-top: 8px; }
.footer-logo { font-size: 28px; font-weight: 900; color: #FFFFFF; text-decoration: none; font-style: italic; letter-spacing: -0.5px; display: inline-block; margin-bottom: 15px; }
.footer-brand p { color: #A8C5D9; margin: 10px 0 0; }
.footer-nav ul, .footer-contact ul { list-style: none; padding: 0; margin: 0; }
.footer-nav li, .footer-contact li { margin-bottom: 10px; color: #B8D4E8; }
.footer-nav a, .footer-contact a { color: #A8C5D9; text-decoration: none; transition: color 0.2s ease; }
.footer-nav a:hover, .footer-contact a:hover { color: #FFFFFF; text-decoration: underline; }
.footer-contact ul li::before { content: "▸"; color: #EA7C07; margin-right: 8px; }
.footer-bottom { border-top: 1px solid #1A4A64; margin-top: 35px; padding-top: 17px; padding-bottom: 17px; text-align: center; }
.footer-bottom p { margin: 0; color: #91B1C6; font-size: 14px; }
@supports (display: flex) {} @supports not (display: grid) { .footer-container { display: flex; flex-wrap: wrap; } .footer-column { flex: 1 1 200px; } }
:root { --header-offset: 122px; }
body { padding-top: var(--header-offset); margin: 0; }
.page-content { overflow-x: hidden; max-width: 100%; }
@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 { background-color: #156d96; }
.header-container { max-width: none; width: 100%; min-height: 60px; padding-left: 15px; padding-right: 15px; }
.header-bottom .header-bottom-container { min-height: 48px; }
.header-bottom .header-bottom-container { max-width: none; width: 100%; }
.logo { font-size: 30px; text-align: center; flex: 1; order: 0; }
.desktop-nav-buttons { display: none; }
.header-bottom { order: 2; background-color: #FFFFFF; }
.hamburger-menu { display: flex; order: 1; flex-shrink: 0; width: 30px; background-color: transparent; }
.bar { background-color: #003366; }
.hamburger-menu.active .bar { background-color: #26A9E0; }
.main-nav { display: none; }
.main-nav.active { display: flex; flex-direction: column; position: fixed; top: 80px; left: 0; width: 76%; max-width: 320px; height: calc(100vh - 80px); background-color: #FFFFFF; padding-top: 25px; padding-left: 0; padding-right: 0; gap: 4px; overflow-y: auto; align-items: stretch; transform: translateX(0); transition: transform 0.3s ease; box-shadow: 4px 0 30px rgba(0, 0, 0, 0.15); z-index: 1001; }
.main-nav a { padding: 13px 16px; border-bottom: 1px solid #EEEEEE; color: #0F4660; font-weight: 600; font-size: 16px; text-align: left; display: block; width: 100%; box-sizing: border-box; }
.main-nav a:hover { background-color: #E8F6FD; }
.mobile-nav-buttons { display: flex; width: 100%; justify-content: center; align-items: center; gap: 8px; padding: 4px 6px 6px; background-color: #FFFFFF; }
.btn-mobile { display: inline-flex; justify-content: center; align-items: center; padding: 8px 10px; border-radius: 6px; text-decoration: none; font-size: 13px; font-weight: 600; white-space: nowrap; width: auto; min-height: 36px; box-sizing: border-box; }
.btn-mobile-download { background-color: #26A9E0; color: #FFFFFF; }
.btn-mobile-login { background-color: #EA7C07; color: #FFFFFF; }
.btn-mobile-register { background-color: #FFD200; color: #2B2B2B; }
.btn-mobile:active { transform: scale(0.98); }
.desktop-nav-buttons { display: none; }
.mobile-menu-overlay.active { display: block; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); z-index: 998; }
.mobile-menu-overlay { display: none; }
}
@media (min-width: 769px) {
.main-nav { display: flex !important; flex-direction: row; }
.mobile-nav-buttons { display: none; }
.mobile-menu-overlay { display: none; }
.hamburger-menu { 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;
}