@charset "UTF-8";
/* CSS Document */ 
:root {
    --primary: #1a73e8;
    --primary-hover: #1765c1;
    --bg: #f6f9fe;
    --card-bg: #fff;
    --text: #202124;
    --text-secondary: #5f6368;
    --border: #e0e3e6;
    --shadow: 0 2px 8px 0 rgba(60,64,67,.06);
    --radius: 10px;
}
* { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Google Sans', 'Roboto', '微软雅黑', 'Arial', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    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: 700;
    color: var(--primary);
    font-size: 1.2rem;
    text-decoration: none;
    letter-spacing: .5px;
}
.logo img {
    width: 38px;
    height: 38px;
    margin-right: 12px;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
}
nav ul li a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: color .2s, border-bottom .2s;
}
nav ul li a:hover, nav ul li a[aria-current="page"] {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}
.hero {
    padding: 48px 0 24px 0;
    text-align: center;
}
.hero h1 {
    font-size: 2.1rem;
    margin-bottom: 12px;
    color: #Fff;
    font-weight: 700;
    letter-spacing: 1px;
}
.hero .subtitle {
    color: #fff;
    font-size: 1.08rem;
    margin-bottom: 0;
    font-weight: 500;
}
.seo-summary {
    max-width: 800px;
    margin: 0 auto 18px auto;
    text-align: center;
    color: #f4f5f8;
    font-size: 1.01rem;
	padding-bottom: 10px;
}
.price-ticker {
    margin: 32px 0 22px 0;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px 0;
}
.price-ticker h2 { text-align: center; margin: 0 0 22px 0; color: var(--primary);}
.price-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
}
.price-box {
    background: #f1f3f4;
    border-radius: var(--radius);
    padding: 14px 20px;
    min-width: 120px;
    text-align: center;
    box-shadow: 0 1px 3px 0 rgba(60,64,67,.06);
    border: 1px solid var(--border);
}
.price-label {
    color: var(--text-secondary);
    font-size: 0.98rem;
}
.price-value {
    display: block;
    font-size: 1.24rem;
    margin-top: 8px;
    font-weight: bold;
    color: var(--primary);
}
.exchange-list { margin: 38px 0; }
.exchange-list h2 { text-align: center; color: var(--primary);}
.exchanges {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 22px;
}
.exchange {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 170px;
    max-width: 180px;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    transition: box-shadow .2s;
}
.exchange:hover { box-shadow: 0 4px 24px #1a73e81a; }
.exchange img {
    width: 62px;
    height: 62px;
    margin-bottom: 2px;
}
.exchange-btn {
    background: var(--primary);
    color: #fff;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    margin-top: 6px;
    border: none;
    transition: background .2s, box-shadow .2s, transform .15s;
    box-shadow: 0 2px 8px #1a73e819;
}
.exchange-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 18px #1a73e819;
    transform: translateY(-2px) scale(1.04);
}
.note {
    text-align: center;
    color: var(--primary);
    font-size: 0.97rem;
    margin-top: 10px;
}
.steps { margin: 44px 0 0 0; }
.steps h2 { text-align: center; color: var(--primary);}
.step-cards {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin: 28px 0 16px 0;
    flex-wrap: wrap;
}
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px 20px;
    min-width: 210px;
    max-width: 330px;
    flex: 1;
    margin-bottom: 12px;
    border: 1px solid var(--border);
}
.card h3 { color: var(--primary);}
.detailed-steps {
    margin: 26px 0 0 0;
    background: #f6f9fe;
    border-radius: var(--radius);
    padding: 20px 15px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.detailed-steps ol { margin: 0 0 0 18px; padding: 0; }
.detailed-steps li { margin: 0 0 14px 0; }
.detailed-steps h3 { margin-top: 0; color: var(--primary);}
.detailed-steps strong { color: var(--primary);}
.detailed-steps div {
    margin-top:14px; background: #f1f3f4; border-radius:6px; padding:12px 14px; color:var(--text-secondary);
}
.platform-compare {
    margin: 36px 0;
}
.platform-compare table {
    width: 100%;
    margin-top: 12px;
    background: #fff;
    border-radius: var(--radius);
    overflow-x: auto;
    border-collapse: collapse;
    font-size: 1rem;
    border: 1px solid var(--border);
}
.platform-compare th, .platform-compare td {
    padding: 10px 8px;
    text-align: center;
    border-bottom: 1px solid #e0e3e6;
}
.platform-compare th {
    background: #f1f3f4;
    color: var(--primary);
    font-weight: bold;
}
.platform-compare tr:last-child td { border-bottom: none; }
.platform-compare tbody tr:nth-child(2n) {
    background: #f8fafd;
}
.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: #e0e3e6;
    border-radius: 4px;
}
.platform-compare .tips {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 8px;
}
.basic-knowledge {
    margin: 44px 0 0 0;
}
.basic-knowledge h2 { text-align: center; color: var(--primary);}
.knowledge-cards {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 22px;
}
.knowledge-cards .card {
    min-width: 220px;
    max-width: 350px;
}
.knowledge-cards ul {
    margin: 8px 0 0 18px;
    color: var(--primary);
    font-size: 0.97rem;
}
.faq {
    margin: 38px 0;
}
.faq h2 { text-align: center; color: var(--primary);}
.faq dl {
    background: #f8fafd;
    border-radius: var(--radius);
    padding: 16px;
    border: 1px solid var(--border);
}
.faq dt {
    font-weight: bold;
    color: var(--primary);
    margin-top: 14px;
}
.faq dd {
    margin-left: 0;
    margin-bottom: 5px;
    color: var(--text-secondary);
}
.warning {
    border-radius: var(--radius);
    margin: 36px 0 24px 0;
    padding: 20px 14px 12px 14px;
    background: #fff8e1;
    border: 1px solid #ffe0b2;
    color: #bf360c;
}
.warning h2 {
    color: #e65100;
    margin-bottom: 14px;
}
.warning ul {
    color: #8d6e63;
}
.main-footer {
    background: var(--card-bg);
    padding: 18px 0;
    margin-top: 28px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.97rem;
    border-top: 1px solid var(--border);
}
.seo-conclusion {
    max-width: 820px;
    margin: 38px auto 0 auto;
    padding: 13px 11px;
    background: #f6f9fe;
    border-radius: var(--radius);
    color: var(--text-secondary);
    text-align: center;
    border: 1px solid var(--border);
    font-size: 1.01rem;
}
@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 {
        padding: 24px 0 8px 0;
        border-radius: 0 0 14px 14px;
    }
    .hero h1 { font-size: 1.32rem; }
    .seo-summary, .seo-conclusion { font-size: 0.95rem;margin: 10px; }
    .exchange, .card { min-width: 88vw; }
    .price-box { padding: 8px 4px; min-width: 80vw; }
    .platform-compare table { font-size: 0.93rem; }
    .platform-compare th, .platform-compare td { padding: 6px 2px; }
    .detailed-steps { padding: 8px 4px; }
}
@media (max-width: 480px) {
    .nav-flex { flex-direction: column; height: auto; gap: 10px; }
    nav ul { flex-direction: column; gap: 6px; }
    .hero { padding: 16px 0 5px 0; }
}
.site-header {
    background-color: #0249b7;
    background-image: url(/img/header-bg.jpg);
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center center;
    min-height: 100px;
    width: 100%;
    border-radius: 0 0 var(--radius) var(--radius);
}
.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: var(--primary);
    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);
        position: absolute;
        left: 0;
        top: 64px;
        box-shadow: 0 6px 24px #1a73e820;
        padding: 16px 0 8px 0;
        margin: 0;
        z-index: 1000;
        border-bottom-left-radius: 12px;
        border-bottom-right-radius: 12px;
        animation: fadeIn .3s;
    }
    .nav-menu.active { display: flex; }
    .nav-menu li { text-align: center; margin: 8px 0; }
    nav ul li a { font-size: 1.03rem; 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; }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-15px);}
    to { opacity: 1; transform: translateY(0);}
}