:root {
    --bg-top: #f4f7ff;
    --bg-bottom: #eef1ff;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: rgba(255, 255, 255, 0.96);
    --text: #121a3c;
    --muted: #62709a;
    --line: rgba(75, 92, 214, 0.14);
    --blue: #2e6bff;
    --purple: #7b48ff;
    --shadow: 0 26px 80px rgba(28, 41, 121, 0.14);
    --radius-xl: 36px;
    --radius-lg: 28px;
    --radius-md: 18px;
    --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 10% 10%, rgba(123, 72, 255, 0.18), transparent 24%),
        radial-gradient(circle at 88% 8%, rgba(46, 107, 255, 0.2), transparent 28%),
        linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 44%, #f8faff 100%);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
p { margin: 0 0 18px; }

.container { width: min(var(--container), calc(100% - 56px)); margin: 0 auto; }
.narrow { width: min(900px, calc(100% - 56px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(247, 249, 255, 0.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(92, 109, 224, 0.09);
}

.header-inner {
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}

.site-brand, .footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-size: 1.22rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.site-brand img, .footer-logo img {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    box-shadow: 0 14px 36px rgba(56, 76, 218, 0.24);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
}

.site-nav a {
    padding: 10px 16px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.95rem;
    transition: .2s ease;
}

.site-nav a:hover, .site-nav a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 16px 30px rgba(72, 66, 214, 0.26);
}

.page-shell { overflow: hidden; }

.hero {
    position: relative;
    padding: 90px 0 58px;
}

.hero::before {
    content: "";
    position: absolute;
    top: -60px;
    left: 50%;
    width: min(900px, 72vw);
    height: 460px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(94, 108, 255, 0.22) 0%, rgba(94, 108, 255, 0.05) 46%, transparent 72%);
    filter: blur(12px);
    pointer-events: none;
}

.hero-grid, .split-grid, .story-grid, .download-grid, .contact-grid, .feature-grid, .pricing-grid, .stats-grid, .blog-highlights, .footer-grid, .hero-metrics, .article-grid {
    display: grid;
    gap: 22px;
}

.card-grid {
    display: grid;
    gap: 22px;
}

.hero-grid { grid-template-columns: 1.15fr .85fr; align-items: stretch; }
.split-grid, .download-grid, .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.story-grid { grid-template-columns: 1.04fr .96fr; }
.feature-grid, .pricing-grid, .stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.blog-highlights { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.article-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.article-grid-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.hero-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.hero-copy, .hero-inner, .article-hero { position: relative; z-index: 1; }
.hero-copy h1, .hero-inner h1 {
    margin: 0 0 18px;
    font-size: clamp(2.6rem, 5vw, 4.9rem);
    line-height: 1.04;
    letter-spacing: -0.045em;
}

.hero-copy p, .hero-inner p, .lead, .section-heading p, .feature-card p, .price-card p, .article-card p, .glass-panel p, .contact-card p, .download-card p, .large-card p {
    color: var(--muted);
    line-height: 1.9;
}

.hero-inner { text-align: center; }
.hero-inner h1 { font-size: clamp(2.2rem, 4vw, 4rem); }

.eyebrow {
    display: inline-flex;
    align-items: center;
    margin-bottom: 18px;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid rgba(110, 95, 234, 0.14);
    background: rgba(255, 255, 255, 0.8);
    color: var(--purple);
    font-size: 0.92rem;
    font-weight: 700;
}

.btn {
    min-width: 160px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 18px 34px rgba(71, 62, 217, 0.28);
}
.btn-secondary {
    color: var(--blue);
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(73, 92, 218, 0.14);
}

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 32px; }
.cta-row.compact { justify-content: center; margin-top: 24px; margin-bottom: 0; }
.center-action { margin-top: 32px; text-align: center; }

.accent-panel, .glass-panel, .feature-card, .price-card, .article-card, .download-card, .contact-card, .stat-card, .large-card, .article-detail {
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.accent-panel, .glass-panel, .feature-card, .price-card, .article-card, .download-card, .contact-card, .stat-card, .large-card {
    padding: 28px;
}

.accent-panel {
    display: grid;
    gap: 18px;
    color: #fff;
    background: linear-gradient(160deg, rgba(39, 88, 255, 0.98), rgba(120, 69, 255, 0.95));
    box-shadow: 0 30px 70px rgba(56, 61, 182, 0.28);
}

.mini-card {
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.12);
}

.mini-card span {
    display: block;
    margin-bottom: 8px;
    opacity: 0.82;
}

.mini-card strong, .status-box strong { line-height: 1.8; }
.status-box {
    padding: 18px 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.13);
}
.status-box span {
    display: block;
    margin-bottom: 8px;
    font-size: 0.92rem;
    opacity: 0.82;
}

.section { padding: 40px 0 66px; }
.section-soft {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.42));
}

.section-heading {
    margin-bottom: 28px;
    text-align: center;
}
.section-heading.left { text-align: left; }
.section-heading h2, .glass-panel h2, .download-card h2, .large-card h2 {
    margin: 0 0 14px;
    font-size: clamp(1.6rem, 3vw, 2.35rem);
    line-height: 1.18;
}

.feature-card h3, .price-card h3, .article-card h3, .contact-card h3 {
    margin: 0 0 12px;
    font-size: 1.24rem;
    line-height: 1.35;
}

.feature-list, .price-card ul, .article-detail ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.9;
}

.stat-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 1.72rem;
}

.stat-card span {
    color: var(--muted);
    line-height: 1.8;
}

.price-card { text-align: center; }
.price-card strong {
    display: block;
    margin-bottom: 12px;
    font-size: 2.4rem;
}
.price-card.featured {
    transform: translateY(-10px);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(245, 241, 255, 0.98));
}
.badge {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(108, 78, 255, 0.12);
    color: var(--purple);
    font-size: 0.9rem;
    font-weight: 700;
}

.article-meta {
    margin-bottom: 12px;
    color: var(--purple);
    font-size: 0.9rem;
    font-weight: 700;
}

.text-link {
    display: inline-flex;
    margin-top: 8px;
    color: var(--blue);
    font-weight: 700;
}

.article-detail {
    padding: 36px;
    background: var(--surface-strong);
}

.article-detail h2 {
    margin: 28px 0 14px;
    font-size: 1.55rem;
}

.article-detail p, .article-detail li {
    color: var(--muted);
    line-height: 2;
    font-size: 1.02rem;
}

.pager {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 34px;
}

.pager a {
    min-width: 46px;
    padding: 10px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(87, 103, 220, 0.16);
    color: var(--muted);
    text-align: center;
}

.pager a.active, .pager a:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
}

.site-footer {
    padding: 34px 0 32px;
    margin-top: 20px;
    border-top: 1px solid rgba(84, 101, 216, 0.1);
    background: rgba(255, 255, 255, 0.48);
}

.footer-grid {
    grid-template-columns: 1.15fr .85fr .85fr;
    align-items: start;
}

.footer-block h3 {
    margin: 0 0 14px;
    font-size: 1.05rem;
}

.footer-block p, .footer-block a, .friend-links, .footer-copy {
    color: var(--muted);
    line-height: 1.9;
}

.footer-block a {
    display: block;
    margin-bottom: 6px;
}

.friend-links {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding-top: 18px;
    margin-top: 18px;
    border-top: 1px solid rgba(89, 105, 220, 0.08);
    font-size: 0.94rem;
}

.friend-links > span {
    min-width: 72px;
    font-weight: 700;
}

.friend-links__items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.footer-copy {
    margin-top: 16px;
    font-size: 0.92rem;
}

.floating-contact {
    position: fixed;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 70;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 18px 38px rgba(72, 64, 213, 0.34);
}

.floating-contact__icon {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    font-size: 0.88rem;
    font-weight: 700;
}

.floating-contact__text {
    font-size: 0.94rem;
    font-weight: 700;
}

@media (max-width: 1100px) {
    .hero-grid, .split-grid, .story-grid, .download-grid, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
    }

    .feature-grid, .pricing-grid, .stats-grid, .blog-highlights, .article-grid, .article-grid-list, .hero-metrics, .three-up {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .price-card.featured { transform: none; }
}

@media (max-width: 760px) {
    .container, .narrow { width: min(100% - 28px, 100%); }
    .header-inner { padding: 14px 0; align-items: flex-start; }
    .site-nav { justify-content: flex-start; }
    .hero { padding: 72px 0 42px; }
    .hero-copy h1, .hero-inner h1 { letter-spacing: -0.03em; }
    .feature-grid, .pricing-grid, .stats-grid, .blog-highlights, .article-grid, .article-grid-list, .hero-metrics, .three-up {
        grid-template-columns: 1fr;
    }
    .article-detail { padding: 24px; }
    .friend-links { flex-direction: column; }
    .floating-contact {
        right: 12px;
        padding: 12px;
    }
    .floating-contact__text { display: none; }
}