/* --- 基础重置 --- */
* { 
    box-sizing: border-box; 
}

body { 
    margin: 0; 
    padding: 0; 
    background: #000; 
    color: #fff; 
    font-family: sans-serif; 
}

/* --- 1. Header (导航栏) --- */
.daohang-lan {
    position: sticky; 
    top: 0; 
    width: 100%; 
    height: 70px; 
    padding: 0 5%; 
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85); 
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12); 
    font-size: 0;
}

.nav-left, 
.nav-center, 
.nav-right { 
    display: inline-block; 
    vertical-align: middle; 
    height: 70px; 
    line-height: 70px; 
    font-size: 14px; 
}

.nav-left   { width: 35%; }
.nav-center { width: 30%; text-align: center; text-decoration: none; }
.nav-right  { width: 35%; text-align: right; }

.nav-left a { 
    color: #ccc; 
    text-decoration: none; 
    font-size: 11px; 
    letter-spacing: 2px; 
    margin-right: 25px; 
}

.biaozhi { 
    height: 22px; 
    vertical-align: middle; 
    margin-right: 12px; 
}

.mingzi { 
    display: inline-block; 
    vertical-align: middle; 
    letter-spacing: 5px; 
    font-weight: 300; 
    font-size: 14px; 
    color: #fff; 
    margin: 0; 
}

.search-bar { 
    display: inline-block; 
    border-bottom: 1px solid #333; 
    padding: 2px 5px; 
    margin-right: 20px; 
    line-height: normal; 
}

.search-bar input { 
    background: transparent; 
    border: none; 
    color: #fff; 
    font-size: 10px; 
    width: 70px; 
    outline: none; 
}

.Shopping { 
    text-decoration: none; 
    color: #fff; 
    margin-right: 20px; 
}

.login-link { 
    color: #ff4500; 
    text-decoration: none; 
    font-size: 11px; 
    border: 1px solid #ff4500; 
    padding: 4px 12px; 
}

/* --- 2. Main (左右互换布局) --- */
.main-content { 
    max-width: 1200px; 
    margin: 80px auto; 
    padding: 0 5%; 
}

.main-content::after { 
    content: ""; 
    display: table; 
    clear: both; 
}

/* 左侧卡片流 */
.left { 
    float: left; 
    width: 60%; 
}

/* 右侧文案 */
.right { 
    float: right; 
    width: 40%; 
    padding-left: 60px; 
}

.right h1 { 
    font-size: 42px; 
    letter-spacing: 8px; 
    font-weight: 200; 
    color: #ff4500; 
    margin: 0 0 25px 0; 
}

.right p { 
    color: #888; 
    line-height: 1.8; 
    font-size: 14px; 
    letter-spacing: 1px; 
}

/* 卡片样式 */
.step-card { 
    background: #080808; 
    border: 1px solid #151515; 
    padding: 30px; 
    margin-bottom: 20px; 
    transition: 0.3s;
}

.step-card:hover { 
    border-color: #333; 
    background: #0c0c0c; 
}

.step-num { 
    font-size: 10px; 
    color: #ff4500; 
    letter-spacing: 3px; 
    display: block; 
    margin-bottom: 10px; 
}

.step-card h2 { 
    font-size: 18px; 
    margin: 0 0 10px 0; 
    font-weight: 300; 
    letter-spacing: 2px; 
}

.step-card p { 
    font-size: 13px; 
    color: #555; 
    margin: 0; 
    line-height: 1.6; 
}

/* --- 3. Footer (页脚) --- */
.big-ft { 
    background: #000; 
    padding: 100px 6% 40px; 
    border-top: 1px solid #111; 
    margin-top: 100px; 
}

.ft-container::after { 
    content: ""; 
    display: table; 
    clear: both; 
}

.ft-text { 
    float: left; 
    width: 25%; 
}

.ft-text h4 { 
    font-size: 11px; 
    color: #ff4500; 
    letter-spacing: 4px; 
    margin-bottom: 30px; 
}

.ft-text a { 
    display: block; 
    color: #555; 
    text-decoration: none; 
    font-size: 12px; 
    margin-bottom: 15px; 
}

.ft-center { 
    float: left; 
    width: 50%; 
    text-align: center; 
}

.big-logo { 
    font-size: 32px; 
    letter-spacing: 15px; 
    font-weight: 200; 
    color: #fff; 
    text-decoration: none; 
    display: block; 
    margin-bottom: 20px; 
}

.ft-center p { 
    color: #444; 
    font-size: 12px; 
    line-height: 2; 
}

.ft-text.right { 
    float: right; 
    text-align: right; 
}

.ft-bottom-line { 
    margin-top: 80px; 
    padding-top: 30px; 
    border-top: 1px solid #080808; 
    font-size: 9px; 
    color: #222; 
    letter-spacing: 3px; 
}

.fl { float: left; }
.fr { float: right; }