@charset "UTF-8";
/* CSS Document */ :root {
    --primary: #ff9800;
    --bg: #181a20;
    --card-bg: #1e2329;
    --text: #fff;
    --subtitle: #ffeb3b;
    --success: #4caf50;
    --danger: #f44336;
    --border: #29304b;
    --shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.15);
}
* {
    box-sizing: border-box;
}
html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: '微软雅黑', 'Microsoft YaHei', 'Arial', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    position: relative;
    min-height: 100vh;
}
.container {
    width: 95%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 8px;
}
nav.main-nav {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: relative;
    z-index: 2;
}
.nav-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    font-weight: 800;
    color: #fcd536;
    font-size: 1.3rem;
    text-decoration: none;
}
.logo img {
    width: 38px;
    height: 38px;
    margin-right: 12px;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 32px;
}
nav ul li a {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    padding: 8px 0;
    transition: color .2s;
}
nav ul li a:hover, nav ul li a[aria-current="page"] {
    color: #fcd536;
    border-bottom: 2px solid #fcd536;
}
.hero {
    padding: 56px 0 22px 0;
    text-align: center;
    position: relative;
    z-index: 2;
    min-height: 220px;
    border-bottom-left-radius: 36px;
    border-bottom-right-radius: 36px;
    overflow: hidden;
}
.hero h1 {
    font-size: 2.1rem;
    margin-bottom: 14px;
    color: #fcd536;
    letter-spacing: 1px;
    text-shadow: 0 6px 18px #10101055, 0 1px 0 #ff980033;
}
.hero .subtitle {
    color: #FFF;
    font-size: 1.08rem;
    margin-bottom: 0;
    font-weight: bold;
    text-shadow: 0 2px 10px #000a;
}
.seo-summary {
    max-width: 800px;
    margin: 0 auto 22px auto;
    text-align: center;
    color: #eaecef;
    font-size: 1.04rem;
    z-index: 2;
    position: relative;
}
.price-ticker {
    margin: 36px 0 24px 0;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px 0;
    position: relative;
    z-index: 2;
}
.price-ticker h2 {
    text-align: center;
    margin: 0 0 22px 0;
}
.price-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
}
.price-box {
    background: #232c47;
    border-radius: 8px;
    padding: 16px 24px;
    min-width: 120px;
    text-align: center;
    box-shadow: 0 2px 8px 0 rgba(44, 59, 113, 0.08);
    border: 1px solid var(--border);
}
.price-label {
    color: #b0c4de;
    font-size: 0.98rem;
}
.price-value {
    display: block;
    font-size: 1.24rem;
    margin-top: 8px;
    font-weight: bold;
}
.exchange-list {
    margin: 40px 0;
}
.exchange-list h2 {
    text-align: center;
}
.exchanges {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 24px;
}
.exchange {
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 180px;
    max-width: 180px;
    margin-bottom: 16px;
}
.exchange img {
    width: 66px;
    height: 66px;
    margin-bottom: 2px;
}
.exchange-btn {
    background: #fcd536;
    color: #000;
    padding: 8px 18px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    margin-top: 2px;
    transition: background .2s, box-shadow .2s, transform .15s;
    box-shadow: 0 2px 16px #ff980020;
}
.exchange-btn:hover {
    background: #e68900;
    box-shadow: 0 2px 28px #ff980070;
    transform: translateY(-2px) scale(1.05);
}
.note {
    text-align: center;
    color: #ffecb3;
    font-size: 0.98rem;
    margin-top: 12px;
}
.steps {
    margin: 50px 0 0 0;
}
.steps h2 {
    text-align: center;
}
.step-cards {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 30px 0 18px 0;
    flex-wrap: wrap;
}
.card {
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 22px 24px;
    min-width: 220px;
    max-width: 330px;
    flex: 1;
    margin-bottom: 14px;
}
.detailed-steps {
    margin: 30px 0 0 0;
    background: #1e2329;
    border-radius: 8px;
    padding: 22px 18px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
}
.detailed-steps ol {
    margin: 0 0 0 18px;
    padding: 0;
}
.detailed-steps li {
    margin: 0 0 18px 0;
}
.detailed-steps h3 {
    margin-top: 0;
}
.platform-compare {
    margin: 44px 0;
}
.platform-compare table {
    width: 100%;
    margin-top: 14px;
    background: #191c29;
    border-radius: 8px;
    overflow-x: auto;
    border-collapse: collapse;
    font-size: 1rem;
}
.platform-compare th, .platform-compare td {
    padding: 10px 8px;
    text-align: center;
    border-bottom: 1px solid #22223c;
}
.platform-compare th {
    background: #22294c;
    color: #ff9800;
}
.platform-compare tr:last-child td {
    border-bottom: none;
}
.platform-compare tbody tr:nth-child(2n) {
    background: #232c47;
}
.platform-compare .mobile-scroll {
    overflow-x: auto;
    width: 100%;
}
.platform-compare .mobile-scroll::-webkit-scrollbar {
    height: 6px;
}
.platform-compare .mobile-scroll::-webkit-scrollbar-thumb {
    background: #33395c;
    border-radius: 4px;
}
.platform-compare .tips {
    color: #b0c4de;
    font-size: 0.96rem;
    margin-top: 10px;
}
.basic-knowledge {
    margin: 54px 0 0 0;
}
.basic-knowledge h2 {
    text-align: center;
}
.knowledge-cards {
    display: flex;
    gap: 22px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 26px;
}
.knowledge-cards .card {
    min-width: 230px;
    max-width: 350px;
}
.knowledge-cards ul {
    margin: 8px 0 0 18px;
    color: #ffd700;
    font-size: 0.98rem;
}
.faq {
    margin: 44px 0;
}
.faq h2 {
    text-align: center;
}
.faq dl {
    background: #1a1d2c;
    border-radius: 8px;
    padding: 18px;
}
.faq dt {
    font-weight: bold;
    color: #ff9800;
    margin-top: 16px;
}
.faq dd {
    margin-left: 0;
    margin-bottom: 6px;
    color: #eaecef;
}
.warning {
    border-radius: 8px;
    margin: 44px 0 28px 0;
    padding: 28px 16px 18px 16px;
}
.warning h2 {
    color: #ffc107;
    margin-bottom: 16px;
}
.warning ul {
    color: #eaecef;
}
.main-footer {
    background: #181c32;
    padding: 20px 0;
    margin-top: 36px;
    text-align: center;
    color: #b0c4de;
    font-size: 0.98rem;
    border-top: 1px solid var(--border);
}
.seo-conclusion {
    max-width: 820px;
    margin: 44px auto 0 auto;
    padding: 16px 14px;
    background: #181e2e;
    border-radius: 8px;
    color: #eaecef;
    text-align: center;
}
@media (max-width: 900px) {
    .container {
        max-width: 98vw;
    }
    .exchanges, .price-container, .step-cards, .knowledge-cards {
        flex-direction: column;
        align-items: center;
    }
    .exchange, .card {
        max-width: 98vw;
        min-width: 88vw;
    }
}
@media (max-width: 700px) {
    .hero {
        min-height: 110px;
        padding: 32px 0 10px 0;
        border-radius: 0 0 18px 18px;
    }
    .hero h1 {
        font-size: 1.35rem;
    }
    .seo-summary, .seo-conclusion {
        font-size: 0.97rem;
    }
    .exchange, .card {
        min-width: 94vw;
    }
    .price-box {
        padding: 12px 6px;
        min-width: 80vw;
    }
    .platform-compare table {
        font-size: 0.95rem;
    }
    .platform-compare th, .platform-compare td {
        padding: 7px 4px;
    }
    .detailed-steps {
        padding: 12px 6px;
    }
}
@media (max-width: 480px) {
    .nav-flex {
        flex-direction: column;
        height: auto;
        gap: 12px;
    }
    nav ul {
        flex-direction: column;
        gap: 6px;
    }
    .hero {
        padding: 24px 0 8px 0;
    }
}
.site-header {
    background-image: url('/img/header-bg.jpg');
    background-repeat: no-repeat;
    background-size: cover;      /* 自动缩放，铺满容器 */
    background-position: center center; /* 居中显示 */
    min-height: 180px;           /* 可根据图片高度自定义，建议设置 */
    width: 100%;
}
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}
.menu-toggle .bar {
    width: 24px;
    height: 3px;
    background: #fff;
    margin: 3px 0;
    border-radius: 2px;
    transition: all .3s;
}
@media (max-width: 700px) {
    .menu-toggle { display: flex; }
    .nav-flex { flex-wrap: wrap; }
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: var(--card-bg, #232c47);
        position: absolute;
        left: 0;
        top: 64px;
        box-shadow: 0 6px 24px #0004;
        padding: 18px 0 8px 0;
        margin: 0;
        z-index: 1000;
        border-bottom-left-radius: 16px;
        border-bottom-right-radius: 16px;
        animation: fadeIn .3s;
    }
    .nav-menu.active { display: flex; }
    .nav-menu li {
        text-align: center;
        margin: 10px 0;
    }
    nav ul li a {
        font-size: 1.07rem;
        padding: 8px 0;
    }
}
@media (min-width: 701px) {
    .menu-toggle { display: none; }
    .nav-menu { display: flex !important; position: static; width: auto; background: none; box-shadow: none; border-radius: 0;}
    .nav-menu li { margin: 0; }
}

/* 可选：菜单展开动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-15px);}
    to { opacity: 1; transform: translateY(0);}
}