*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --cloud-light: #e8e0f0;
    --cloud-mid: #b8a9d4;
    --cloud-deep: #7b5ea7;
    --sky-top: #1a1a2e;
    --sky-mid: #16213e;
    --sky-low: #0f3460;
    --accent-gold: #e2c06e;
    --surface: #1a1a2e;
    --surface2: #222240;
    --text: #e8e0f0;
    --muted: #9a8bab;
    --radius: 16px;
}

html { scroll-behavior: smooth; }

body {
    background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 40%, var(--sky-low) 100%);
    background-attachment: fixed;
    color: var(--text);
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

/* ── 导航栏 ── */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 5vw;
    height: 64px;
    background: rgba(26,26,46,.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(232,224,240,.06);
}
.logo {
    font-size: 1.3rem; font-weight: 700;
    background: linear-gradient(135deg, var(--cloud-light), var(--cloud-mid), var(--accent-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: 1.5px;
}
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
    color: var(--muted); text-decoration: none; font-size: .9rem;
    transition: color .2s;
}
.nav-links a:hover { color: var(--cloud-light); }
.nav-cta {
    background: linear-gradient(135deg, var(--cloud-deep), #5a3f8a);
    color: #fff; border: 1px solid rgba(232,224,240,.15);
    padding: .5rem 1.4rem; border-radius: 8px; font-size: .88rem; font-weight: 600;
    cursor: pointer; text-decoration: none;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(123,94,167,.4);
    border-color: rgba(232,224,240,.3);
}

/* ── 首屏 Hero ── */
.hero {
    min-height: 100vh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    text-align: center;
    padding: 100px 5vw 60px;
    position: relative; overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(184,169,212,.2) 0%, transparent 60%),
        radial-gradient(ellipse 40% 40% at 20% 70%, rgba(226,192,110,.1) 0%, transparent 50%),
        radial-gradient(ellipse 50% 50% at 80% 60%, rgba(123,94,167,.15) 0%, transparent 50%);
    pointer-events: none;
}
.badge {
    display: inline-block;
    background: rgba(184,169,212,.08);
    border: 1px solid rgba(184,169,212,.25);
    color: var(--cloud-mid);
    font-size: .78rem; letter-spacing: 1px;
    padding: .3rem 1rem; border-radius: 999px;
    margin-bottom: 1.8rem;
    backdrop-filter: blur(4px);
}
.hero h1 {
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    font-weight: 800; line-height: 1.12;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #f5f0ff 20%, var(--cloud-mid), var(--accent-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 1.4rem;
}
.hero p {
    max-width: 580px;
    font-size: 1.05rem; color: var(--muted);
    margin-bottom: 2.4rem;
    line-height: 1.7;
}
.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }
.btn-primary {
    background: linear-gradient(135deg, var(--cloud-deep), #5a3f8a);
    color: #fff; text-decoration: none;
    padding: .75rem 2.2rem; border-radius: 10px;
    font-size: 1rem; font-weight: 600;
    border: 1px solid rgba(232,224,240,.2);
    box-shadow: 0 4px 20px rgba(123,94,167,.35);
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(123,94,167,.55);
    border-color: rgba(232,224,240,.4);
}
.btn-secondary {
    background: transparent;
    color: var(--cloud-light); text-decoration: none;
    padding: .75rem 2rem; border-radius: 10px;
    font-size: 1rem; font-weight: 600;
    border: 1px solid rgba(232,224,240,.12);
    transition: border-color .2s, background .2s;
}
.btn-secondary:hover {
    border-color: rgba(232,224,240,.35);
    background: rgba(232,224,240,.04);
}

/* ── 数据展示栏 ── */
.stats {
    display: flex; flex-wrap: wrap; gap: 1px;
    background: rgba(232,224,240,.04);
    border: 1px solid rgba(232,224,240,.06);
    border-radius: var(--radius);
    overflow: hidden;
    margin: 4.5rem auto 0;
    max-width: 820px; width: 100%;
}
.stat {
    flex: 1 1 160px;
    background: rgba(26,26,46,.7);
    backdrop-filter: blur(8px);
    padding: 1.5rem 1.8rem;
    text-align: center;
}
.stat-num {
    font-size: 1.9rem; font-weight: 800;
    background: linear-gradient(135deg, var(--cloud-mid), var(--accent-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: .8rem; color: var(--muted); margin-top: .3rem; }

/* ── 通用区块 ── */
.section { padding: 6rem 5vw; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.3rem);
    font-weight: 700; margin-bottom: .6rem;
    color: var(--cloud-light);
}
.section-header p { color: var(--muted); max-width: 500px; margin: 0 auto; }

/* ── 优势卡片 ── */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1100px; margin: 0 auto;
}
.feature-card {
    background: rgba(26,26,46,.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(232,224,240,.06);
    border-radius: var(--radius);
    padding: 2rem;
    transition: transform .25s, border-color .25s, box-shadow .25s;
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(184,169,212,.3);
    box-shadow: 0 8px 32px rgba(123,94,167,.12);
}
.feature-icon {
    width: 46px; height: 46px;
    background: linear-gradient(135deg, rgba(184,169,212,.15), rgba(226,192,110,.1));
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
}
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; color: var(--cloud-light); }
.feature-card p { font-size: .9rem; color: var(--muted); line-height: 1.65; }

/* ── 节点展示栏 ── */
.regions {
    background: rgba(26,26,46,.5);
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(232,224,240,.06);
    border-bottom: 1px solid rgba(232,224,240,.06);
    padding: 3.5rem 5vw;
    text-align: center;
}
.regions h3 {
    font-size: 1rem; color: var(--muted);
    text-transform: uppercase; letter-spacing: 2px;
    margin-bottom: 2rem;
}
.region-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: .8rem; }
.region-tag {
    background: rgba(34,34,64,.6);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(232,224,240,.08);
    border-radius: 999px;
    padding: .45rem 1.1rem; font-size: .85rem; color: var(--text);
    display: flex; align-items: center; gap: .5rem;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; flex-shrink: 0; }
.dot.hot { background: var(--accent-gold); box-shadow: 0 0 10px rgba(226,192,110,.5); }

/* ── 定价区块 ── */
.cta-section {
    padding: 6rem 5vw;
    text-align: center;
    position: relative; overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 50% 50% at 50% 50%, rgba(184,169,212,.08) 0%, transparent 70%);
    pointer-events: none;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px; margin: 0 auto;
}
.plan-card {
    background: rgba(26,26,46,.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(232,224,240,.07);
    border-radius: 20px;
    padding: 2.2rem 2rem;
    display: flex; flex-direction: column;
    transition: transform .25s, border-color .25s, box-shadow .25s;
    position: relative; overflow: hidden;
}
.plan-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(123,94,167,.15);
}
.plan-card.featured {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 1px var(--accent-gold), 0 8px 32px rgba(226,192,110,.15);
}
.plan-card.featured::before {
    content: '推荐';
    position: absolute; top: 16px; right: -24px;
    background: linear-gradient(135deg, var(--accent-gold), #c8943e);
    color: #1a1a2e; font-size: .72rem; font-weight: 700;
    padding: .25rem 2.2rem;
    transform: rotate(45deg);
    letter-spacing: .5px;
}
.plan-name {
    font-size: .82rem; text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--muted); margin-bottom: .9rem;
}
.plan-price {
    display: flex; align-items: flex-end; gap: .2rem;
    margin-bottom: 1.5rem;
}
.plan-price .amount {
    font-size: 2.8rem; font-weight: 800; line-height: 1;
    background: linear-gradient(135deg, var(--cloud-light), var(--accent-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.plan-price .currency {
    font-size: 1rem; font-weight: 600; color: var(--muted);
    padding-bottom: .4rem;
}
.plan-price .cycle {
    font-size: .82rem; color: var(--muted); padding-bottom: .4rem;
}
.plan-features {
    list-style: none; flex: 1;
    display: flex; flex-direction: column; gap: .7rem;
    margin-bottom: 2rem;
}
.plan-features li {
    display: flex; align-items: flex-start; gap: .55rem;
    font-size: .88rem; color: var(--muted);
}
.plan-features li .check {
    color: #22c55e; font-size: .95rem; flex-shrink: 0; margin-top: .08rem;
}
.plan-features li .check.star { color: var(--accent-gold); }
.plan-btn {
    display: block; text-align: center; text-decoration: none;
    padding: .75rem 1.5rem; border-radius: 10px;
    font-size: .95rem; font-weight: 600;
    transition: transform .2s, box-shadow .2s;
}
.plan-btn.outline {
    border: 1px solid rgba(232,224,240,.18); color: var(--cloud-light);
}
.plan-btn.outline:hover {
    border-color: rgba(232,224,240,.4);
    background: rgba(232,224,240,.05);
}
.plan-btn.solid {
    background: linear-gradient(135deg, var(--cloud-deep), #5a3f8a);
    color: #fff;
    border: 1px solid rgba(232,224,240,.2);
    box-shadow: 0 4px 16px rgba(123,94,167,.3);
}
.plan-btn.solid:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(123,94,167,.45);
    border-color: rgba(232,224,240,.4);
}
.plan-divider {
    border: none; border-top: 1px solid rgba(232,224,240,.06);
    margin: 1.2rem 0;
}

/* ── 页脚 ── */
footer {
    border-top: 1px solid rgba(232,224,240,.06);
    padding: 2rem 5vw;
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 1rem;
    font-size: .82rem; color: var(--muted);
}
.footer-links {
    display: flex; align-items: center; gap: 1.2rem;
}
.footer-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    text-decoration: none;
    transition: color .2s;
}
.footer-link svg {
    width: 18px;
    height: 18px;
    display: block;
    fill: currentColor;
}
.footer-link:hover { color: var(--cloud-light); }

/* ── 响应式 ── */
@media (max-width: 600px) {
    .nav-links { display: none; }
    .stats { border-radius: 12px; }
    footer { flex-direction: column; text-align: center; }
}