/* ==========================================================
   海外社交媒体账号购买服务 - 全局样式
   ========================================================== */
:root {
    --brand: #1a56db;
    --brand-dark: #1230a8;
    --brand-light: #e8efff;
    --accent: #f97316;
    --accent-dark: #c2410c;
    --text: #1f2937;
    --text-soft: #4b5563;
    --text-mute: #6b7280;
    --border: #e5e7eb;
    --bg: #ffffff;
    --bg-soft: #f6f8fc;
    --radius: 12px;
    --shadow: 0 6px 24px rgba(16, 40, 90, .08);
    --shadow-hover: 0 14px 32px rgba(16, 40, 90, .14);
    --container: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.75;
    font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }
ul, ol { margin: 0 0 1rem; padding-left: 1.25rem; }
li { margin-bottom: .4rem; }
p { margin: 0 0 1rem; }

h1, h2, h3, h4 {
    line-height: 1.35;
    margin: 0 0 .75rem;
    color: #111827;
    font-weight: 700;
}
h1 { font-size: 2.1rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- 顶部公告 ---------- */
.topbar {
    background: linear-gradient(90deg, #1230a8, #1a56db 60%, #2563eb);
    color: #fff;
    font-size: .85rem;
}
.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    min-height: 38px;
    flex-wrap: wrap;
}
.topbar a { color: #fff; font-weight: 600; }

/* ---------- 导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: saturate(160%) blur(6px);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 68px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 800;
    color: #111827;
    letter-spacing: .5px;
}
.logo span.mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand), #22d3ee);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    box-shadow: var(--shadow);
}
.logo small {
    display: block;
    font-size: .7rem;
    font-weight: 500;
    color: var(--text-mute);
    letter-spacing: 0;
}

.main-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
}
.main-nav a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--text);
    font-weight: 600;
    font-size: .95rem;
}
.main-nav a:hover { background: var(--brand-light); color: var(--brand-dark); }
.main-nav a.is-active { background: var(--brand); color: #fff; }
.nav-toggle {
    display: none;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: .9rem;
    cursor: pointer;
    color: var(--text);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border: none;
    border-radius: 999px;
    background: var(--brand);
    color: #fff;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { background: var(--brand-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-accent { background: var(--accent); }
.btn-accent:hover { background: var(--accent-dark); }
.btn-ghost { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.btn-ghost:hover { background: var(--brand-light); color: var(--brand-dark); }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    background:
        radial-gradient(900px 380px at 12% 10%, rgba(37, 99, 235, .18), transparent 60%),
        radial-gradient(700px 340px at 88% 20%, rgba(34, 211, 238, .18), transparent 60%),
        var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: 60px 0 52px;
}
.hero h1 { max-width: 900px; font-size: 2.35rem; }
.hero .lead { font-size: 1.05rem; color: var(--text-soft); max-width: 760px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 26px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.hero-badges li {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: .85rem;
    color: var(--text-soft);
    margin: 0;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-top: 32px;
}
.hero-stats div {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}
.hero-stats-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hero-stats-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.hero-stats strong { display: block; font-size: 1.5rem; color: var(--brand-dark); }
.hero-stats span { font-size: .85rem; color: var(--text-mute); }

/* ---------- 区块 ---------- */
.section { padding: 56px 0; }
.section-soft { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 820px; margin: 0 auto 32px; text-align: center; }
.section-head p { color: var(--text-soft); margin-bottom: 0; }
.eyebrow {
    display: inline-block;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--brand);
    background: var(--brand-light);
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 10px;
}

/* ---------- 平台卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 2px 10px rgba(16, 40, 90, .04);
    transition: transform .18s ease, box-shadow .2s ease, border-color .2s ease;
    display: flex;
    flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #c7d7fb; }
.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    color: #fff;
    margin-bottom: 14px;
}
.card h3 { margin-bottom: 6px; font-size: 1.15rem; }
.card h3 a { color: #111827; }
.card h3 a:hover { color: var(--brand); }
.card p { color: var(--text-soft); font-size: .93rem; }
.card ul.features { list-style: none; padding: 0; margin: 0 0 16px; font-size: .9rem; color: var(--text-soft); }
.card ul.features li { display: flex; gap: 8px; margin-bottom: 6px; }
.card ul.features li::before { content: "✓"; color: #16a34a; font-weight: 700; }
.card .card-foot { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; }

.ic-tw { background: #000; }
.ic-yt { background: #ff0000; }
.ic-ig { background: linear-gradient(135deg, #f9ce34, #ee2a7b, #6228d7); }
.ic-fb { background: #1877f2; }
.ic-tg { background: #229ed9; }
.ic-tt { background: #111; }
.ic-in { background: #0a66c2; }
.ic-gm { background: linear-gradient(135deg, #ea4335, #34a853); }
.ic-dc { background: #5865f2; }

/* ---------- 商品表 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
table.shop {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
    font-size: .93rem;
}
table.shop th, table.shop td { padding: 14px 16px; border-bottom: 1px solid var(--border); text-align: left; }
table.shop thead th { background: var(--brand-light); color: var(--brand-dark); font-weight: 700; }
table.shop tbody tr:last-child td { border-bottom: none; }
table.shop tbody tr:hover { background: #fafcff; }

/* ---------- 流程 / 特点 ---------- */
.steps { counter-reset: step; display: grid; gap: 18px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.step {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    position: relative;
}
.step::before {
    counter-increment: step;
    content: counter(step);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    margin-bottom: 10px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 4px; }
.step p { font-size: .9rem; color: var(--text-soft); margin: 0; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    font-size: .85rem;
    padding: 12px 0;
}
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.breadcrumb li::after { content: "/"; margin-left: 8px; color: #9ca3af; }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--text-soft); }
.breadcrumb [aria-current] { color: var(--brand); font-weight: 600; }

/* ---------- 内容页布局 ---------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; }
article.post h2 { margin-top: 34px; padding-left: 12px; border-left: 4px solid var(--brand); }
article.post h3 { margin-top: 22px; color: var(--brand-dark); }
article.post ul { color: var(--text-soft); }

.sidebar { position: sticky; top: 96px; display: grid; gap: 18px; }
.widget {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: 0 2px 10px rgba(16, 40, 90, .04);
}
.widget h3 { font-size: 1rem; margin-bottom: 10px; }
.widget ul { list-style: none; padding: 0; margin: 0; font-size: .9rem; }
.widget ul li { border-bottom: 1px dashed var(--border); padding-bottom: 6px; margin-bottom: 6px; }
.widget ul li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.widget .contact-line { font-size: 1.1rem; font-weight: 800; color: var(--accent-dark); letter-spacing: 1px; }

/* ---------- 评价 ---------- */
.review {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.review .stars { color: #f59e0b; letter-spacing: 2px; font-size: .95rem; }
.review p { font-size: .93rem; color: var(--text-soft); }
.review .who { font-size: .85rem; color: var(--text-mute); }
.review .who strong { color: var(--text); }

/* ---------- FAQ ---------- */
.faq details {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    padding: 14px 18px;
}
.faq summary {
    cursor: pointer;
    font-weight: 700;
    color: #111827;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--brand); font-weight: 800; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 10px; margin-bottom: 0; color: var(--text-soft); font-size: .93rem; }

/* ---------- 联系条 ---------- */
.cta-band {
    background: linear-gradient(120deg, #1230a8, #1a56db 55%, #0ea5e9);
    color: #fff;
    padding: 46px 0;
    text-align: center;
}
.cta-band h2, .cta-band p { color: #fff; }
.cta-band .wechat-list {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 18px 0 22px;
}
.cta-band .wechat-list li {
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .35);
    border-radius: 999px;
    padding: 10px 22px;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 1px;
    margin: 0;
}
.cta-band .btn { background: #fff; color: var(--brand-dark); }
.cta-band .btn:hover { background: #e8efff; color: var(--brand-dark); }

/* ---------- 弹窗 ---------- */
.modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(15, 23, 42, .62);
    z-index: 200;
}
.modal.is-open { display: flex; }
.modal-box {
    background: #fff;
    border-radius: 16px;
    max-width: 460px;
    width: 100%;
    padding: 28px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .28);
    position: relative;
    animation: pop .18s ease-out;
}
@keyframes pop { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-box h3 { margin-bottom: 6px; }
.modal-box .sub { color: var(--text-mute); font-size: .9rem; margin-bottom: 18px; }
.modal-close {
    position: absolute;
    top: 12px;
    right: 14px;
    border: none;
    background: transparent;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    color: var(--text-mute);
}
.wechat-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--bg-soft);
    border: 1px dashed var(--brand);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 12px;
}
.wechat-card .num { font-size: 1.25rem; font-weight: 800; color: var(--accent-dark); letter-spacing: 1px; }
.modal-tip { font-size: .85rem; color: var(--text-mute); margin-top: 14px; }
.copy-btn {
    border: 1px solid var(--brand);
    background: #fff;
    color: var(--brand);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: .82rem;
    cursor: pointer;
    font-weight: 700;
}
.copy-btn:hover { background: var(--brand-light); }

/* ---------- 页脚 ---------- */
.site-footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 48px 0 20px;
    font-size: .9rem;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 28px; }
.site-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.site-footer .we { color: #fff; font-weight: 800; letter-spacing: 1px; }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .1);
    margin-top: 30px;
    padding-top: 16px;
    font-size: .82rem;
    color: #94a3b8;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

/* ---------- 相关推荐 ---------- */
.related { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 48px 0; }

/* ---------- 无障碍隐藏 ---------- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .layout { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 780px) {
    h1 { font-size: 1.65rem; }
    .hero h1 { font-size: 1.75rem; }
    h2 { font-size: 1.35rem; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .nav-toggle { display: inline-flex; }
    .main-nav {
        display: none;
        position: absolute;
        left: 0; right: 0; top: 100%;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
    }
    .main-nav.is-open { display: block; }
    .main-nav ul { flex-direction: column; align-items: stretch; padding: 10px; }
    .main-nav a { padding: 12px 14px; }
    .header-inner { position: relative; }
    .footer-grid { grid-template-columns: 1fr; }
    .section { padding: 40px 0; }
}
@media (max-width: 520px) {
    .grid-4, .steps, .hero-stats { grid-template-columns: 1fr; }
}