:root {
  --header-offset: 164px;
  --primary: #FF8C1A;
  --primary-light: #FFA53A;
  --bg-dark: #0D0E12;
  --card-bg: #17191F;
  --text-main: #FFF3E6;
  --border-color: #A84F0C;
  --glow: #FFB04D;
  --deep-orange: #D96800;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  padding-top: var(--header-offset);
  overflow-x: hidden;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--bg-dark);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  border-bottom: 2px solid var(--deep-orange);
}
.header-top {
  background-color: #141519;
  width: 100%;
  border-bottom: 1px solid #25272E;
}
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 24px;
  min-height: 68px;
}
.logo {
  display: inline-block;
  font-size: 32px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--primary);
  text-decoration: none;
  text-transform: uppercase;
  background: linear-gradient(135deg, #FFA53A 0%, #FF8C1A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 20px rgba(255, 140, 26, 0.3);
  line-height: 1;
}
.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}
.btn {
  display: inline-block;
  min-width: 100px;
  text-align: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  color: #fff;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}
.btn-download {
  background: #2A2C37;
  border: 1px solid #5A5F73;
  color: #E8EAED;
}
.btn-download:hover {
  background: #3D4048;
  border-color: #7A7F95;
}
.btn-primary {
  background: linear-gradient(180deg, #FFA53A 0%, #D96800 100%);
  box-shadow: 0 4px 15px rgba(255, 140, 26, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(255, 140, 26, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}
.btn-login {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary-light);
}
.btn-login:hover {
  background: rgba(255, 140, 26, 0.15);
}
.main-nav {
  background-color: #17191F;
  width: 100%;
  display: flex;
  border-top: 1px solid #2A2C37;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  padding: 6px 20px;
  width: 100%;
}
.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: 4px;
  width: 100%;
}
.nav-menu li {
  margin: 0;
}
.nav-menu li a {
  display: block;
  padding: 10px 14px;
  color: #FFF3E6;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  border-radius: 6px;
  text-transform: uppercase;
}
.nav-menu li a:hover {
  color: #FFB04D;
  background: rgba(255, 140, 26, 0.25);
  text-shadow: 0 0 10px rgba(255, 176, 77, 0.5);
}
.mobile-nav-buttons {
  display: none;
}
.hamburger-menu {
  display: none;
}
.mobile-menu-overlay {
  display: none;
}
.mobile-menu {
  display: none;
}
.site-footer {
  background: linear-gradient(180deg, #17191F 0%, #101114 100%);
  border-top: 2px solid var(--primary);
  padding: 50px 20px 20px;
  margin-top: 30px;
  max-width: 100%;
  overflow: hidden;
}
.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
.footer-column {
  flex: 1;
  min-width: 200px;
  max-width: 380px;
}
.footer-logo a {
  color: var(--primary);
  font-size: 34px;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 15px rgba(255, 140, 26, 0.4);
}
.footer-desc {
  color: #B0B0B0;
  line-height: 1.6;
  margin-top: 15px;
  font-size: 14px;
}
.footer-column:first-child {
  max-width: 340px;
}
.footer-title {
  color: var(--primary-light);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 15px;
  text-transform: uppercase;
  position: relative;
  padding-bottom: 6px;
}
.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--primary);
}
.footer-nav ul {
  list-style: none;
  padding: 0;
}
.footer-nav li {
  margin-bottom: 10px;
}
.footer-nav a {
  color: #B0B0B0;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}
.footer-nav a:hover {
  color: var(--primary);
  text-shadow: 0 0 5px rgba(255, 140, 26, 0.5);
}
.footer-bottom {
  border-top: 1px solid #282A32;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  padding-top: 20px;
}
.footer-bottom p {
  color: #777;
  font-size: 13px;
}
@media (max-width: 768px) {
  :root {
    --header-offset: 146px;
  }
  body {
    overflow-x: hidden;
  }
  .site-header {
    border-bottom: 1px solid rgba(168, 79, 12, 0.3);
  }
  .header-top {
    border-bottom: 1px solid #25272E;
  }
  .header-container {
    width: 100%;
    max-width: none;
    justify-content: center;
    align-items: center;
    padding-top: 8px;
    padding-bottom: 8px;
    min-height: 60px;
    padding-left: 70px;
    padding-right: 70px;
  }
  .logo {
    font-size: 24px;
    max-width: 120px;
    text-align: center;
    line-height: 1.1;
  }
  .header-actions {
    display: none;
  }
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 320px;
    height: 100%;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    background-color: #17191F;
    overflow-y: auto;
    padding-top: 60px;
    z-index: 1001;
    border-right: 1px solid var(--deep-orange);
  }
  .main-nav.active {
    display: flex;
    transform: translateX(0);
  }
  .nav-container {
    width: 100%;
    max-width: none;
    padding: 10px;
    display: block;
  }
  .nav-menu {
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 2px;
    display: block;
  }
  .nav-menu li {
    width: 100%;
    text-align: center;
  }
  .nav-menu li a {
    padding: 14px 10px;
    font-size: 13px;
    color: #FFF3E6;
    text-decoration: none;
    display: block;
    transition: all 0.3s;
    border-left: 3px solid transparent;
  }
  .nav-menu li a:hover {
    background-color: rgba(255, 140, 26, 0.1);
    border-left-color: var(--primary);
    color: var(--primary-light);
  }
  .mobile-nav-buttons {
    display: block;
    display: flex;
    justify-content: center;
    gap: 8px;
    align-items: center;
    padding: 6px 12px;
    background-color: #17191F;
    border-top: 1px solid #1D1F26;
    border-bottom: 1px solid #1D1F26;
  }
  .mobile-nav-buttons .btn {
    min-width: 100px;
    padding: 8px 12px;
    font-size: 13px;
  }
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
    position: absolute;
    top: 10px;
    left: 16px;
  }
  .hamburger-menu span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s ease;
  }
  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
  .mobile-menu-overlay {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
  }
  .mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  .mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 320px;
    height: 100%;
    background-color: #17191F;
    z-index: 1000;
    flex-direction: column;
    padding-top: 60px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }
  .mobile-menu.active {
    display: flex;
    width: 100%;
    transform: translateX(0);
  }
  .mobile-menu-list {
    list-style: none;
    padding: 0;
    width: 100%;
    display: block;
  }
  .mobile-menu-list li {
    text-align: center;
    border-bottom: 1px solid #22242B;
  }
  .mobile-menu-list a {
    display: block;
    padding: 16px;
    color: #FFF3E6;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    text-transform: none;
  }
  .mobile-menu-list a:hover {
    background-color: rgba(255, 140, 26, 0.1);
    color: var(--primary);
  }
  .site-footer {
    width: 100%;
    overflow-x: hidden;
  }
  .footer-container {
    flex-direction: column;
    gap: 30px;
    width: 100%;
  }
  .footer-column {
    max-width: 100%;
    min-width: 100%;
  }
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
}
/* 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;
}