:root {
    --bg-main: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    --bg-soft: linear-gradient(135deg, #eef2ff 0%, #f8f9ff 100%);
    --bg-panel: rgba(255, 255, 255, 0.9);
    --card-bg: #ffffff;
    --card-alt: linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%);
    --text-strong: #24324a;
    --text-body: #586172;
    --line-soft: rgba(74, 108, 247, 0.12);
    --primary: #4a6cf7;
    --primary-dark: #3555dd;
    --accent: #6a11cb;
    --shadow: 0 18px 45px rgba(37, 58, 117, 0.12);
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-main);
}

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

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

button {
    border: 0;
    background: none;
    font: inherit;
}

.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(74, 108, 247, 0.08);
}

.nav-container {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo img {
    width: 34px;
    height: 34px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 26px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-strong);
    opacity: 0.82;
    transition: color 0.25s ease, opacity 0.25s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--primary);
    opacity: 1;
}

.hero,
.page-hero {
    padding: 72px 0 54px;
}

.hero-layout,
.page-hero-layout,
.split-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 34px;
    align-items: center;
}

.hero-copy h1,
.page-hero-copy h1,
.split-copy h2,
.section-heading h2 {
    color: var(--text-strong);
    line-height: 1.15;
}

.hero-copy h1,
.page-hero-copy h1 {
    font-size: clamp(2.5rem, 6vw, 4.1rem);
    margin-bottom: 18px;
}

.hero-copy h1 {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-copy p,
.page-hero-copy p,
.split-copy p,
.section-heading p,
.card p,
.download-card p,
.notice-box p,
.highlight-panel p,
.metric-card p,
.timeline-item p,
.faq-answer p {
    color: var(--text-body);
}

.eyebrow {
    display: inline-flex;
    margin-bottom: 14px;
    padding: 7px 14px;
    border-radius: 999px;
    background: rgba(74, 108, 247, 0.12);
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.hero-actions,
.cta-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 26px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
}

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

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 14px 30px rgba(74, 108, 247, 0.28);
}

.btn-secondary {
    color: var(--primary);
    background: rgba(74, 108, 247, 0.1);
}

.btn-block {
    width: 100%;
}

.btn-download {
    min-height: 60px;
    padding: 0 36px;
    font-size: 18px;
    letter-spacing: 0.04em;
}

.is-disabled {
    opacity: 0.68;
    cursor: default;
    pointer-events: none;
}

.hero-points,
.checklist-panel ul,
.site-footer ul {
    list-style: none;
}

.hero-points {
    display: grid;
    gap: 12px;
    margin-top: 26px;
}

.hero-points li,
.info-item,
.checklist-panel li {
    position: relative;
    padding-left: 24px;
}

.hero-points li::before,
.info-item::before,
.checklist-panel li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

.hero-visual-card,
.metric-card,
.highlight-panel,
.notice-box,
.checklist-panel {
    background: var(--bg-panel);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.hero-visual-card {
    padding: 18px;
}

.hero-visual-card img {
    border-radius: 18px;
}

.metric-card,
.highlight-panel,
.notice-box,
.checklist-panel {
    padding: 28px;
}

.metric-card span,
.highlight-panel strong,
.notice-box strong {
    display: block;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 10px;
}

.metric-card strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-strong);
    font-size: 1.7rem;
}

.section {
    padding: 84px 0;
}

.section-white {
    background: #fff;
}

.section-tint {
    background: var(--bg-soft);
}

.section-heading {
    max-width: 700px;
    margin-bottom: 40px;
}

.section-heading h2,
.split-copy h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

.card-grid {
    display: grid;
    gap: 24px;
}

.feature-grid {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.audience-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card,
.download-card {
    padding: 28px;
    background: var(--card-alt);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 34px rgba(35, 52, 110, 0.08);
    border: 1px solid rgba(74, 108, 247, 0.08);
}

.card-left,
.download-card {
    text-align: left;
}

.card h3,
.download-card h3,
.timeline-item h3,
.site-footer h3 {
    color: var(--text-strong);
    margin-bottom: 10px;
}

.card-icon,
.download-icon {
    width: 58px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 18px;
    background: rgba(74, 108, 247, 0.12);
    font-size: 28px;
}

.info-list,
.step-list {
    display: grid;
    gap: 14px;
    margin-top: 24px;
}

.timeline {
    display: grid;
    gap: 18px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 24px;
    background: var(--card-alt);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 28px rgba(35, 52, 110, 0.08);
}

.timeline-step,
.step-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-weight: 700;
}

.step-item {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.download-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.download-card {
    background: #fff;
}

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-item {
    overflow: hidden;
    background: #fff;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(35, 52, 110, 0.08);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    text-align: left;
    font-weight: 700;
    color: var(--text-strong);
    cursor: pointer;
    background: linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%);
}

.faq-answer {
    display: none;
    padding: 0 24px 22px;
}

.faq-item.is-open .faq-answer {
    display: block;
}

.site-footer {
    background: #24324a;
    color: rgba(255, 255, 255, 0.82);
    padding: 52px 0 26px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 28px;
}

.site-footer ul {
    display: grid;
    gap: 10px;
}

.site-footer a:hover {
    color: #fff;
}

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 14px;
}

@media (max-width: 900px) {
    .hero-layout,
    .page-hero-layout,
    .split-layout {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        order: -1;
    }
}

@media (max-width: 720px) {
    .container {
        width: min(100% - 28px, 1200px);
    }

    .nav-container {
        padding: 16px 0;
        align-items: flex-start;
        flex-direction: column;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 14px 18px;
    }

    .hero,
    .page-hero {
        padding-top: 36px;
    }

    .btn-download {
        min-height: 56px;
        padding: 0 28px;
        font-size: 17px;
    }

    .section {
        padding: 62px 0;
    }

    .timeline-item,
    .step-item {
        grid-template-columns: 1fr;
    }

    .timeline-step,
    .step-item span {
        margin-bottom: 8px;
    }
}