/* 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', sans-serif; background: #f5f6f8; color: #333; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* 页眉 (Header) */
header { width: 100%; height: 80px; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
.header_inner { width: 1200px; height: 100%; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; font-size: 20px; font-weight: bold; color: #2B3A68; }
.logo img { height: 40px; margin-right: 10px; }
nav a { margin: 0 15px; font-size: 14px; color: #555; transition: color 0.3s; }
nav a:hover, nav a.active { color: #2B3A68; }
.auth a { margin-left: 20px; font-size: 14px; color: #999; }
.auth a:hover { color: #2B3A68; }

/* 广告位 (Advertisement) */
.advertising { width: 100%; height: 450px; background: linear-gradient(135deg, #0d1e3e 0%, #32466e 100%); position: relative; }
.ad_inner { width: 1200px; margin: 0 auto; padding-top: 100px; text-align: center; color: #fff; }
.ad_inner h1 { font-size: 48px; letter-spacing: 2px; font-weight: bold; }
.ad_inner h1::before { content: '2020 '; color: #e4b039; }
.ad_inner h1::after { content: ' ℗'; font-size: 16px; vertical-align: super; }
.ad_inner p { font-size: 18px; margin: 20px 0 40px; opacity: 0.8; }
.cta_btn { width: 160px; height: 48px; border: none; border-radius: 24px; background: #e4b039; color: #fff; font-size: 16px; cursor: pointer; box-shadow: 0 4px 12px rgba(228, 176, 57, 0.4); }
.cta_btn:hover { background: #c99a2a; }

/* 风险提示 */
.tips { width: 100%; padding: 12px 0; background: #fff; text-align: center; font-size: 12px; color: #999; border-bottom: 1px solid #eee; }

/* 行情模块 */
.market_container { width: 1200px; margin: 30px auto; background: #fff; padding: 20px; border: 1px solid #eee; box-shadow: 0 2px 10px rgba(0,0,0,0.02); border-radius: 4px; }
.market_title { display: flex; align-items: center; border-bottom: 1px solid #eee; padding-bottom: 15px; margin-bottom: 20px; }
.btc_icon { width: 30px; height: 30px; border: 2px solid #68AAEB; border-radius: 50%; color: #68AAEB; line-height: 26px; text-align: center; font-weight: bold; margin-right: 12px; }
.market_tabs { margin-left: auto; display: flex; gap: 20px; font-size: 14px; color: #999; }
.market_tabs span { cursor: pointer; }
.more_data { background: #87bff7; color: #fff; border: none; padding: 4px 12px; border-radius: 12px; font-size: 12px; margin-left: 20px; cursor: pointer; }
.market_data { display: flex; justify-content: space-between; }
.data_item { font-size: 14px; color: #999; text-align: center; }
.data_item span { display: block; font-size: 20px; color: #333; margin-top: 6px; }
.data_item .price { color: #e4b039; }
.market_chart { width: 100%; margin: 20px 0; background: #f9fafc; border: 1px solid #eef1f6; border-radius: 4px; padding: 10px; }
.market_controls { display: flex; justify-content: center; gap: 10px; }
.market_controls button { padding: 6px 18px; background: #f0f3f9; border: none; border-radius: 2px; font-size: 14px; color: #666; cursor: pointer; }
.market_controls button.active { background: #68AAEB; color: #fff; }

/* 宣传模块 */
.service_container { width: 100%; background: #68AAEB; padding: 60px 0; color: #fff; }
.service_container h3 { text-align: center; font-size: 24px; margin-bottom: 40px; font-weight: 300; }
.service_cards { width: 1200px; margin: 0 auto; display: flex; justify-content: center; gap: 40px; }
.card { background: #fff; color: #333; width: 320px; padding: 40px 30px; border-radius: 8px; text-align: center; }
.icon_box { font-size: 48px; color: #68AAEB; margin-bottom: 20px; }
.card h4 { font-size: 20px; margin-bottom: 15px; font-weight: normal; }
.card p { font-size: 14px; color: #888; line-height: 1.6; }

/* 新闻中心 - 效果图表格样式 */
.news_container { width: 1200px; margin: 40px auto; background: #fff; padding: 40px; border: 1px solid #eee; box-shadow: 0 4px 12px rgba(0,0,0,0.02); }
.news_header_title { text-align: center; border-bottom: 1px solid #eee; padding-bottom: 20px; margin-bottom: 30px; }
.news_header_title h2 { font-size: 28px; color: #4a69a8; }
.news_header_title p { font-size: 12px; color: #999; margin-top: 6px; letter-spacing: 2px; }
.news_list_two_col { display: flex; gap: 30px; }
.news_col { flex: 1; display: flex; flex-direction: column; gap: 30px; }
.news_item { display: flex; gap: 20px; border-bottom: 1px dashed #eee; padding-bottom: 20px; }
.news_date { background: #7dbdfa; color: #fff; padding: 5px 10px; text-align: center; border-radius: 2px; width: 65px; height: 55px; }
.news_date .year { display: block; font-size: 12px; opacity: 0.9; }
.news_date .day { font-size: 16px; font-weight: bold; }
.news_content h4 { font-size: 16px; color: #333; margin-bottom: 6px; }
.news_content p { font-size: 13px; color: #888; line-height: 1.5; }

/* 联系方式图标模块 */
.contact_more_section { margin-top: 60px; text-align: center; border-top: 1px solid #eee; padding-top: 40px; }
.contact_more_section h3 { font-size: 20px; color: #4a69a8; margin-bottom: 30px; }
.contact_icons { display: flex; justify-content: space-between; }
.contact_item { background: #fff; padding: 20px 0; width: 18%; text-align: center; box-shadow: 0 2px 6px rgba(0,0,0,0.02); border: 1px solid #f8f8f8; }
.contact_item .icon { width: 50px; height: 50px; border-radius: 50%; margin: 0 auto 10px; color: #fff; line-height: 50px; font-size: 20px; }
.bg_qq { background: #4db8ff; } .bg_phone { background: #ff73ba; } .bg_wechat { background: #a6e22e; } .bg_weibo { background: #ff6c6c; } .bg_email { background: #f0ad4e; }
.contact_item p { font-size: 12px; color: #888; }

/* 登录页面 */
.login_body { background: #0a0f22; overflow: hidden; }
.login_bg_layout { height: 100vh; background: radial-gradient(circle at top left, #1c2b52, #0a0f22); position: relative; z-index: 1; display: flex; flex-direction: column; }
.login_header { padding: 30px 60px; }
.login_main { width: 1100px; margin: 50px auto; display: flex; justify-content: space-between; align-items: center; flex: 1; }
.left_slogan { color: #fff; width: 45%; }
.left_slogan h1 { font-size: 36px; margin-bottom: 10px; letter-spacing: 1px; }
.sub_slogan { font-size: 20px; margin-bottom: 40px; color: #8ca6cf; }
.slogan_box { background: rgba(255,255,255,0.1); backdrop-filter: blur(8px); padding: 25px; border-radius: 8px; }
.slogan_box h3 { font-size: 20px; }
.slogan_box p { font-size: 14px; color: rgba(255,255,255,0.8); margin-top: 10px; }
.login_box { width: 380px; background: #fff; padding: 40px; border-radius: 6px; position: relative; }
.box_tabs { display: flex; justify-content: center; gap: 40px; font-size: 20px; padding-bottom: 20px; border-bottom: 2px solid #eee; margin-bottom: 30px; }
.box_tabs span { cursor: pointer; color: #999; padding-bottom: 20px; margin-bottom: -22px; }
.box_tabs span.active { color: #4db8ff; border-bottom: 2px solid #4db8ff; }
.input_group { margin-bottom: 25px; position: relative; border-bottom: 1px solid #ddd; }
.input_group input { width: 100%; border: none; padding: 10px 0; outline: none; font-size: 14px; }
.input_group .forgot_pwd { position: absolute; right: 0; top: 8px; font-size: 12px; color: #999; }
.login_btn { width: 100%; background: #4db8ff; color: #fff; border: none; padding: 12px; border-radius: 24px; font-size: 16px; cursor: pointer; margin-top: 10px; }

/* 页脚 */
footer { background: #232630; padding: 40px 0 20px; color: #a1a5b3; }
.footer_inner { width: 1200px; margin: 0 auto; }
.foot_top { padding-bottom: 20px; border-bottom: 1px solid #383d4a; }
.foot_logo img { height: 30px; vertical-align: middle; margin-right: 10px; }
.foot_logo { font-size: 18px; color: #fff; }
.foot_mid { display: flex; justify-content: space-between; margin: 20px 0 30px; }
.foot_links { font-size: 14px; }
.foot_links span { margin: 0 10px; color: #555; }
.foot_links a:hover { color: #fff; }
.foot_contact p { font-size: 14px; line-height: 1.6; }
.foot_btm { text-align: center; font-size: 12px; line-height: 1.8; border-top: 1px solid #383d4a; padding-top: 20px; }

/* 适配移动端的基础响应式 (使用了Flexbox/媒体查询) */
@media (max-width: 768px) {
    .header_inner, .ad_inner, .market_container, .service_cards, .news_container, .footer_inner, .login_main { width: 95%; }
    .header_inner { flex-direction: column; height: auto; padding: 10px 0; gap: 10px; }
    nav { flex-wrap: wrap; justify-content: center; }
    .market_data { flex-wrap: wrap; justify-content: center; gap: 15px; width: 100%; }
    .data_item { width: 40%; margin-bottom: 15px; }
    .service_cards { flex-direction: column; align-items: center; gap: 20px; }
    .news_list_two_col { flex-direction: column; gap: 20px; }
    .contact_icons { flex-wrap: wrap; justify-content: center; gap: 15px; }
    .contact_item { width: 40%; }
    .login_main { flex-direction: column; padding: 20px; }
    .left_slogan { width: 100%; margin-bottom: 30px; text-align: center; }
    .login_box { width: 100%; }
    .foot_mid { flex-direction: column; gap: 20px; align-items: center; text-align: center; }
}