:root {
    --bg: #f5f7ff;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-solid: #ffffff;
    --line: rgba(83, 107, 255, 0.12);
    --text: #17203a;
    --muted: #5f6787;
    --blue: #3163ff;
    --purple: #7a44ff;
    --blue-deep: #1e2f9d;
    --shadow: 0 24px 60px rgba(38, 54, 137, 0.16);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(122, 68, 255, 0.18), transparent 30%),
        radial-gradient(circle at top right, rgba(49, 99, 255, 0.16), transparent 24%),
        linear-gradient(180deg, #eef2ff 0%, #f9fbff 40%, #f3f6ff 100%);
    line-height: 1.75;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.narrow {
    width: min(860px, calc(100% - 40px));
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(16px);
    background: rgba(245, 247, 255, 0.84);
    border-bottom: 1px solid rgba(100, 118, 255, 0.08);
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 82px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 24px;
    letter-spacing: 0.02em;
}

.brand img {
    width: 42px;
    height: 42px;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 15px;
    color: var(--muted);
}

.main-nav a:hover,
.text-link:hover {
    color: var(--blue);
}

.header-download,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 12px 22px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.header-download,
.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 16px 36px rgba(74, 78, 216, 0.28);
}

.btn-secondary {
    color: var(--blue-deep);
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(59, 90, 255, 0.14);
}

.header-download:hover,
.btn:hover {
    transform: translateY(-2px);
}

.hero,
.sub-hero {
    position: relative;
    overflow: hidden;
}

.hero {
    padding: 72px 0 48px;
}

.sub-hero {
    padding: 64px 0 22px;
}

.hero-grid,
.split-grid,
.download-layout,
.contact-grid {
    display: grid;
    gap: 28px;
}

.hero-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    align-items: stretch;
}

.hero-copy,
.hero-panel,
.info-panel,
.download-card,
.price-card,
.contact-card,
.feature-card,
.tile-card,
.blog-card,
.blog-row,
.article-body {
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.hero-copy,
.hero-panel,
.info-panel,
.download-card,
.price-card,
.contact-card,
.feature-card,
.tile-card,
.blog-card,
.blog-row {
    border-radius: 28px;
    padding: 28px;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--blue);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 13px;
}

h1,
h2,
h3 {
    margin: 0 0 16px;
    line-height: 1.2;
}

h1 {
    font-size: clamp(34px, 5vw, 58px);
}

h2 {
    font-size: clamp(28px, 3vw, 38px);
}

h3 {
    font-size: 22px;
}

p,
li,
.post-keywords,
.article-meta {
    color: var(--muted);
    font-size: 16px;
}

.hero-text {
    max-width: 700px;
    font-size: 18px;
}

.hero-actions,
.download-actions,
.article-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 28px 0 0;
}

.hero-points,
.download-list,
.info-panel ul {
    margin: 24px 0 0;
    padding-left: 18px;
}

.hero-panel {
    position: relative;
    background: linear-gradient(180deg, rgba(35, 54, 175, 0.92), rgba(112, 62, 255, 0.92));
    color: #fff;
}

.hero-panel p,
.hero-panel strong {
    color: #fff;
}

.hero-badge,
.plan-tag,
.post-date {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.hero-badge,
.plan-tag {
    background: rgba(255, 255, 255, 0.14);
}

.panel-list {
    display: grid;
    gap: 18px;
    margin-top: 24px;
}

.section {
    padding: 28px 0 52px;
}

.section-alt {
    background: linear-gradient(180deg, rgba(233, 238, 255, 0.72), rgba(245, 247, 255, 0));
}

.section-heading {
    max-width: 860px;
    margin-bottom: 24px;
}

.feature-grid,
.three-grid,
.pricing-grid,
.blog-grid {
    display: grid;
    gap: 22px;
}

.feature-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.three-grid,
.pricing-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.split-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    align-items: start;
}

.blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.download-layout,
.contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.download-card {
    grid-column: span 2;
}

.price-card.featured {
    background: linear-gradient(180deg, rgba(56, 90, 255, 0.9), rgba(116, 73, 255, 0.88));
    color: #fff;
}

.price-card.featured p,
.price-card.featured .price-value {
    color: #fff;
}

.price-value {
    margin-bottom: 14px;
    font-size: 30px;
    font-weight: 800;
    color: var(--blue-deep);
}

.blog-list {
    display: grid;
    gap: 18px;
}

.blog-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.post-date {
    margin-bottom: 14px;
    color: var(--blue);
    background: rgba(49, 99, 255, 0.08);
}

.text-link {
    color: var(--blue);
    font-weight: 700;
    white-space: nowrap;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.pagination a,
.pagination span {
    min-width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(65, 91, 255, 0.14);
    background: rgba(255, 255, 255, 0.9);
}

.pagination .current {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(135deg, var(--blue), var(--purple));
}

.article-detail {
    padding-top: 10px;
}

.article-body {
    border-radius: 30px;
    padding: 34px;
}

.article-body p {
    margin: 0 0 18px;
    font-size: 17px;
}

.site-footer {
    padding: 24px 0 36px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr;
    gap: 24px;
    padding: 28px;
    border-radius: 28px;
    background: rgba(16, 25, 61, 0.94);
    color: rgba(255, 255, 255, 0.86);
    box-shadow: var(--shadow);
}

.footer-grid p,
.footer-grid span,
.footer-grid a {
    color: rgba(255, 255, 255, 0.72);
}

.footer-brand,
.footer-title {
    margin-bottom: 12px;
    font-size: 18px;
    font-weight: 800;
    color: #fff;
}

.footer-links,
.friend-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-note {
    padding-top: 14px;
    text-align: center;
    color: var(--muted);
    font-size: 14px;
}

.floating-service {
    position: fixed;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    padding: 16px 14px;
    border-radius: 18px;
    writing-mode: vertical-rl;
    background: linear-gradient(180deg, var(--blue), var(--purple));
    color: #fff;
    font-weight: 800;
    box-shadow: 0 18px 40px rgba(53, 72, 198, 0.28);
}

@media (max-width: 1080px) {
    .hero-grid,
    .feature-grid,
    .three-grid,
    .pricing-grid,
    .blog-grid,
    .split-grid,
    .download-layout,
    .contact-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .download-card {
        grid-column: auto;
    }

    .blog-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 860px) {
    .header-bar {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 0;
    }

    .main-nav {
        gap: 12px 16px;
    }

    .hero,
    .sub-hero,
    .section {
        padding-top: 22px;
    }

    .hero-copy,
    .hero-panel,
    .info-panel,
    .download-card,
    .price-card,
    .contact-card,
    .feature-card,
    .tile-card,
    .blog-card,
    .blog-row,
    .article-body,
    .footer-grid {
        padding: 22px;
    }

    .floating-service {
        right: 10px;
        padding: 12px 10px;
        font-size: 13px;
    }
}