* { box-sizing: border-box; }
body { margin: 0; font-family: "Microsoft YaHei", Arial, sans-serif; color: #1f2a44; background: #f4f7ff; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; width: 100%; margin: 0 auto; padding: 0; }
.head { position: relative; width: 100%; background-color: #21293e; }
.head_top { display: flex; justify-content: space-between; max-width: 1200px; margin: 0 auto; width: 100%; }
.top_left { display: flex; width: 25%; padding: 12px 0; }
.top_left .logo { width: 127px; height: 41px; }
.top_left_intd { display: flex; flex-direction: column; justify-content: center; margin-left: 6px; line-height: 1.5; }
.top_left_intd span { font-size: 10px; font-weight: 500; color: #ffffff; }
.top_right { display: flex; justify-content: space-between; width: 75%; }
.top_nav { position: relative; width: 100%; }
.top_nav > #nav { position: relative; z-index: 990; display: flex; flex-direction: row; justify-content: flex-start; width: 100%; height: 100%; margin: 0; padding: 0; list-style: none; }
.top_nav #nav > li { display: flex; align-items: center; width: 64px; margin-right: 20px; position: relative; }
.top_nav #nav > li > a { position: relative; font-size: 16px; color: #ffffff; cursor: pointer; }
.top_nav #nav > li a:hover, .top_nav #nav > li.active > a { color: #1476ef; }
.top_nav #nav > li.active > a::after { position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); content: ""; width: 40px; height: 2px; background-color: #1476ef; }
.top_right .login_btn { display: flex; justify-content: center; align-items: center; position: relative; z-index: 990; width: 104px; height: 40px; font-size: 16px; color: #ffffff; border-radius: 4px; background-color: #1869ff; cursor: pointer; margin: 12px 0; }
.top_right .login_btn:hover { color: #1869ff; background-color: #ffffff; border: 1px solid #1869ff; box-sizing: border-box; }
.hero { width: 100%; margin: 0; padding: 64px 0 48px; background: linear-gradient(180deg, #ffffff 0%, #f1f6ff 100%); border-bottom: 1px solid #e7eeff; }
.hero-inner { width: min(1200px, calc(100% - 32px)); margin: 0 auto; text-align: center; }
.hero h1 { margin: 0 0 18px; font-size: 42px; line-height: 1.25; font-weight: 500; color: #181818; }
.hero p { max-width: 920px; margin: 0 auto; font-size: 17px; line-height: 32px; color: #4b587c; }
.hero-tags { display: flex; justify-content: center; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero-tags span { display: inline-flex; align-items: center; height: 34px; padding: 0 16px; border-radius: 4px; background: #ffffff; color: #1869ff; font-size: 14px; box-shadow: 3px 6px 18px 1px rgba(24,105,255,0.08); }
.wrap { width: min(1200px, calc(100% - 32px)); margin: 42px auto 72px; }
.section { background: #fff; border: 1px solid #e7eeff; border-radius: 6px; padding: 34px; margin-bottom: 26px; box-shadow: 6px 8px 18px 1px rgba(216,224,249,.20); }
.section-title { margin: 0 0 22px; font-size: 28px; line-height: 1.35; font-weight: 500; color: #181818; text-align: center; }
.section-desc { max-width: 920px; margin: -6px auto 28px; font-size: 16px; line-height: 30px; color: #5a6788; text-align: center; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-card { min-height: 178px; padding: 26px 24px; background: linear-gradient(180deg, #fff 0%, #fbfdff 100%); border: 1px solid #e7eeff; border-radius: 6px; box-shadow: 3px 6px 16px 1px rgba(216,224,249,.18); }
.feature-card strong { display: block; margin-bottom: 10px; font-size: 20px; font-weight: 500; color: #1869ff; }
.feature-card p, .version-box p, .faq-item p { margin: 0; font-size: 15px; line-height: 28px; color: #4a5878; }
.version-box { display: grid; grid-template-columns: 1.1fr 2fr; overflow: hidden; border: 1px solid #e7eeff; border-radius: 6px; background: #fff; }
.version-head { padding: 30px; background: linear-gradient(135deg, #1869ff 0%, #3ea3ff 100%); color: #fff; }
.version-head h2 { margin: 0 0 12px; font-size: 24px; font-weight: 500; }
.version-head p { margin: 0; color: #fff; font-size: 15px; line-height: 28px; }
.version-content { padding: 30px; }
.version-content h3 { margin: 0 0 12px; font-size: 22px; color: #181818; font-weight: 500; }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.faq-item { position: relative; min-height: 150px; padding: 26px 26px 24px 72px; border: 1px solid #e7eeff; border-radius: 6px; background: #fff; }
.faq-item::before { content: "Q"; position: absolute; left: 26px; top: 28px; display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(322deg, #fff 0%, #eaefff 100%); color: #1869ff; font-size: 18px; font-weight: 600; box-shadow: 3px 3px 14px 1px rgba(216,224,249,.56); }
.faq-item h3 { margin: 0 0 10px; font-size: 20px; font-weight: 500; color: #181818; }
.actions { display: flex; justify-content: center; gap: 16px; margin-top: 30px; flex-wrap: wrap; }
.actions a { display: inline-flex; align-items: center; justify-content: center; width: 154px; height: 42px; border-radius: 4px; background: #1869ff; color: #fff; font-size: 15px; }
.actions a.secondary { background: #fff; color: #1869ff; box-shadow: 3px 6px 18px 1px rgba(24,105,255,0.08); }
.hidden { display: none !important; }
.foot { background-color: #3a3d42; padding-bottom: 0; }
.foot-padding { padding-bottom: 6.25vw; }
.page_bottom { display: flex; flex-direction: column; align-items: center; padding: 40px 0; }
.page_bottom > span { margin-bottom: 20px; font-size: 12px; color: #999; }
.page_bottom > div { display: flex; align-items: center; }
.page_bottom div > img { margin-right: 6px; }
.page_bottom div > span { font-size: 12px; color: #999; }
.footer-fixed-box { position: fixed; bottom: -8px; left: 0; width: 100vw; z-index: 99; }
.footer-fixed-img { width: 100%; height: auto; display: block; }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(.92); } 100% { transform: scale(1); } }
.footer-fixed-btn { width: 8.6vw; height: 2.18vw; line-height: 2.18vw; font-size: .95vw; color: #1869ff; background: #fff; box-shadow: 3px 6px 18px 1px rgba(24,105,255,.08); animation: pulse 1.3s infinite; position: absolute; bottom: 3.073vw; right: 24.1667%; text-align: center; cursor: pointer; }
.footer-fixed-icon { width: 1.875vw; height: 1.875vw; border-radius: 50%; position: absolute; bottom: 4.948vw; right: 18.073%; cursor: pointer; }
.contacts { position: fixed; right: 19px; bottom: 56px; z-index: 999; width: 64px; height: 256px; background-color: #fff; box-shadow: 0 0 15px #e7e7e7; border-radius: 4px; }
.contact_info { display: flex; flex-direction: column; justify-content: space-evenly; height: 100%; margin: 0; padding: 0; list-style: none; }
.contact_info li { display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; }
.contact_info li:hover > span { color: #2589ff; }
.contact_info li > img { width: 22px; height: 18px; margin-bottom: 8px; }
.contact_info li > span { font-size: 12px; line-height: 20px; color: #999; }
.popup { position: fixed; right: 123px; bottom: 56px; z-index: 999; background-color: #fff; box-shadow: 0 0 40px #e7e7e7; }
.popup_content { display: flex; flex-direction: column; align-items: center; width: 254px; padding: 20px; box-sizing: border-box; }
.popup_content .popup_title { width: 100%; padding-bottom: 18px; margin: 0; font-size: 16px; line-height: 27px; color: #333; text-align: center; border-bottom: 1px inset #eaeaea; }
.popup_content .popup_tel { margin-top: 20px; text-align: center; }
.popup_content .popup_tel > span { font-size: 14px; color: #333; }
.popup_content .popup_tel .tel_number { width: 100%; margin-top: 12px; padding: 12px 30px; border: 1px solid #2589ff; border-radius: 4px; }
.popup_content .popup_tel .tel_number span { font-size: 14px; color: #2589ff; }
.popup_triangle { position: absolute; top: 90px; right: -36px; z-index: 999; width: 0; height: 0; margin: 0; border-top: 22px solid transparent; border-bottom: 22px solid transparent; border-left: 24px solid #fff; transform: translate(-50%, -50%); }
.popup_bg { position: fixed; left: 0; top: 0; z-index: 998; width: 100%; height: 100%; background-color: rgba(0,0,0,.65); opacity: .65; }
.chat_popup { position: fixed; left: 50%; top: 50%; z-index: 999; transform: translateY(-50%) translateX(-50%); }
.chat_popup .chat_popup_content { position: relative; width: 406px; height: 541px; }
.card_cancel { position: absolute; top: 14px; right: 14px; width: 25px; height: 25px; background-color: transparent; cursor: pointer; }
.chat_popup_content > .chat_card { width: 100%; height: 100%; }
@media (max-width: 800px) {
  .head_top { flex-direction: column; padding: 0 10px 12px; }
  .top_left, .top_right { width: 100%; }
  .top_right { flex-wrap: wrap; gap: 10px; }
  .top_nav > #nav { flex-wrap: wrap; row-gap: 12px; }
  .hero { padding: 42px 0; }
  .hero h1 { font-size: 30px; }
  .card-grid, .faq-list, .version-box { grid-template-columns: 1fr; }
  .section { padding: 22px; }
  .contacts { right: 10px; bottom: 26px; transform: scale(.88); transform-origin: right bottom; }
  .footer-fixed-btn { width: 96px; height: 28px; line-height: 28px; font-size: 13px; right: 24%; bottom: 20px; }
  .footer-fixed-icon { width: 26px; height: 26px; right: 8%; bottom: 42px; }
  .foot-padding { padding-bottom: 72px; }
  .chat_popup .chat_popup_content { width: 320px; height: auto; }
}