* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: #255fba;
    --primary-soft: #eaf4ff;
    --ink: #172033;
    --muted: #61708a;
    --line: #dce8f7;
    --card: #ffffff;
    --bg: #f7fbff;
    --radius-lg: 24px;
    --radius-md: 18px;
    --shadow: 0 18px 45px rgba(39, 87, 150, 0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f3f9ff 0%, #ffffff 42%, #f8fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.container {
    width: min(100% - 32px, 1160px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(220, 232, 247, 0.85);
    backdrop-filter: blur(16px);
}

.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #12325f;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: #ffffff;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: #1c3f70;
    border-radius: 2px;
}

.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    padding: 12px;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.site-nav.open {
    display: flex;
}

.site-nav a {
    padding: 12px 14px;
    border-radius: 12px;
    color: #385171;
    font-size: 15px;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--primary-dark);
    background: var(--primary-soft);
}

.hero {
    position: relative;
    padding: 54px 0 44px;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    right: -210px;
    top: 20px;
    background: radial-gradient(circle, rgba(70,139,223,0.25), rgba(70,139,223,0));
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 34px;
    align-items: center;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--primary-dark);
    background: rgba(70,139,223,0.11);
    font-size: 13px;
    font-weight: 700;
}

.hero h1,
.page-hero h1 {
    margin: 18px 0 16px;
    font-size: clamp(32px, 8vw, 58px);
    line-height: 1.12;
    letter-spacing: -0.05em;
    color: #10284f;
}

.hero p,
.page-hero p {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 17px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: rgb(70,139,223);
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(70,139,223,0.26);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    white-space: nowrap;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 16px 34px rgba(70,139,223,0.32);
}

.trust-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.trust-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid rgba(70,139,223,0.24);
    color: #315377;
    background: rgba(255,255,255,0.72);
    font-size: 13px;
}

.hero-visual {
    position: relative;
    max-width: 430px;
    margin: 0 auto;
}

.hero-card {
    position: absolute;
    left: 0;
    bottom: 24px;
    max-width: 210px;
    padding: 14px;
    border-radius: 18px;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.hero-card strong {
    display: block;
    color: #12325f;
    font-size: 14px;
}

.hero-card small {
    color: var(--muted);
}

.app-shot {
    width: min(82vw, 360px);
    margin-left: auto;
    filter: drop-shadow(0 22px 44px rgba(30, 79, 142, 0.18));
}

.section {
    padding: 42px 0;
}

.section-header {
    max-width: 760px;
    margin-bottom: 24px;
}

.section-header.center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.section h2,
.content h2 {
    margin: 0 0 12px;
    color: #12325f;
    font-size: clamp(25px, 5vw, 38px);
    line-height: 1.25;
    letter-spacing: -0.035em;
}

.section-header p,
.content p,
.card p,
.info-panel p,
.faq-item p {
    color: var(--muted);
}

.feature-grid,
.card-grid,
.step-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.card,
.info-panel,
.faq-item,
.step-card {
    background: var(--card);
    border: 1px solid rgba(220,232,247,0.92);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(42, 90, 145, 0.08);
}

.card h3,
.step-card h3,
.info-panel h3,
.faq-item h2,
.faq-item h3 {
    margin: 0 0 10px;
    color: #17345f;
    line-height: 1.35;
}

.card p,
.step-card p,
.info-panel p,
.faq-item p {
    margin: 0;
}

.card-icon {
    width: 42px;
    height: 42px;
    margin-bottom: 14px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    color: var(--primary-dark);
    background: var(--primary-soft);
    font-weight: 900;
}

.soft-section {
    background: linear-gradient(135deg, rgba(70,139,223,0.10), rgba(255,255,255,0.85));
    border-top: 1px solid rgba(220,232,247,0.8);
    border-bottom: 1px solid rgba(220,232,247,0.8);
}

.two-col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    align-items: center;
}

.metric-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
}

.metric {
    padding: 16px;
    border-radius: 18px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.metric strong {
    display: block;
    color: var(--primary-dark);
    font-size: 23px;
}

.metric span {
    color: var(--muted);
    font-size: 13px;
}

.page-hero {
    padding: 48px 0 34px;
    background: linear-gradient(135deg, rgba(70,139,223,0.12), rgba(255,255,255,0.96));
    border-bottom: 1px solid rgba(220,232,247,0.88);
}

.page-hero .container {
    max-width: 940px;
}

.content {
    padding: 38px 0 54px;
}

.content-narrow {
    max-width: 900px;
    margin: 0 auto;
}

.content p {
    margin: 0 0 18px;
}

.notice {
    margin: 24px 0;
    padding: 20px;
    border-radius: var(--radius-md);
    color: #224b7b;
    background: rgba(70,139,223,0.10);
    border: 1px solid rgba(70,139,223,0.20);
}

.notice strong {
    color: #12325f;
}

.check-list,
.clean-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.check-list li,
.clean-list li {
    position: relative;
    margin: 10px 0;
    padding-left: 28px;
    color: var(--muted);
}

.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.7em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
}

.download-panel {
    margin-top: 28px;
    padding: 24px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #ffffff, #eef6ff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
}

.download-panel p {
    margin: 0;
}

.faq-list {
    display: grid;
    gap: 14px;
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: #ffffff;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 560px;
}

th,
td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

th {
    color: #14345f;
    background: var(--primary-soft);
}

td {
    color: var(--muted);
}

.site-footer {
    background: #10284f;
    color: rgba(255,255,255,0.78);
    padding: 40px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
}

.footer-brand img {
    width: 34px;
    height: 34px;
    border-radius: 10px;
}

.site-footer h3 {
    margin: 0 0 10px;
    color: #ffffff;
    font-size: 16px;
}

.site-footer a {
    display: block;
    margin: 8px 0;
    color: rgba(255,255,255,0.74);
}

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

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.14);
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: rgba(255,255,255,0.62);
    font-size: 13px;
}

@media (min-width: 720px) {
    .container {
        width: min(100% - 48px, 1160px);
    }

    .hero {
        padding: 72px 0 64px;
    }

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

    .download-panel {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 980px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
    }

    .site-nav a {
        padding: 9px 12px;
    }

    .hero-grid {
        grid-template-columns: 1.08fr 0.92fr;
        gap: 60px;
    }

    .hero p,
    .page-hero p {
        font-size: 18px;
    }

    .section {
        padding: 64px 0;
    }

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

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

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

    .two-col {
        grid-template-columns: 1fr 1fr;
        gap: 46px;
    }

    .content {
        padding: 54px 0 78px;
    }
}