* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(32, 88, 166);
    --primary-soft: rgb(229, 241, 255);
    --text: #172033;
    --muted: #657286;
    --line: rgba(70,139,223,.16);
    --card: rgba(255,255,255,.92);
    --shadow: 0 18px 45px rgba(27, 79, 138, .10);
    --radius: 22px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.72;
    background:
        radial-gradient(circle at 20% 0%, rgba(70,139,223,.17), transparent 32%),
        linear-gradient(180deg, #f4f9ff 0%, #ffffff 42%, #eef6ff 100%);
    overflow-x: hidden;
}

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

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

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(70,139,223,.12);
}

.nav-wrap {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: .2px;
    color: #10213f;
}

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

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 14px;
    background: var(--primary-soft);
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 11px;
}

.nav-toggle span {
    height: 2px;
    width: 100%;
    background: var(--primary-dark);
    border-radius: 99px;
}

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

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

.site-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: #334056;
    font-weight: 600;
}

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

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

.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    background: rgba(70,139,223,.12);
    border: 1px solid rgba(70,139,223,.16);
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

h1,
h2,
h3 {
    line-height: 1.22;
    margin: 0 0 14px;
    color: #111b2d;
}

h1 {
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -1.3px;
}

h2 {
    font-size: clamp(25px, 5vw, 40px);
    letter-spacing: -.5px;
}

h3 {
    font-size: 20px;
}

.lead {
    font-size: 18px;
    color: #4b5b74;
    margin: 0 0 24px;
}

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

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 24px;
    border-radius: 16px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(70,139,223,.26);
    border: 1px solid rgba(255,255,255,.35);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: rgb(55,125,211);
    box-shadow: 0 18px 36px rgba(70,139,223,.32);
}

.trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 22px;
}

.badge {
    display: inline-flex;
    padding: 7px 11px;
    border-radius: 999px;
    background: rgba(255,255,255,.75);
    border: 1px solid var(--line);
    color: #304466;
    font-size: 13px;
    font-weight: 700;
}

.visual-card {
    position: relative;
    padding: 22px;
    border-radius: 30px;
    background: linear-gradient(145deg, rgba(255,255,255,.82), rgba(226,241,255,.92));
    box-shadow: var(--shadow);
    border: 1px solid rgba(70,139,223,.16);
}

.visual-card::before,
.visual-card::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(70,139,223,.18);
    filter: blur(1px);
}

.visual-card::before {
    width: 90px;
    height: 90px;
    right: 18px;
    top: 28px;
}

.visual-card::after {
    width: 56px;
    height: 56px;
    left: 18px;
    bottom: 26px;
}

.app-shot {
    position: relative;
    z-index: 1;
    width: min(340px, 86%);
    margin: 0 auto;
    filter: drop-shadow(0 24px 38px rgba(23, 70, 128, .18));
}

.section {
    padding: 42px 0;
}

.section-head {
    margin-bottom: 22px;
    max-width: 760px;
}

.section-head p {
    color: var(--muted);
    margin: 0;
}

.card,
.info-panel,
.faq-item,
.article-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card {
    padding: 22px;
}

.card p,
.article-card p,
.info-panel p {
    color: var(--muted);
    margin: 0;
}

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

.feature-card {
    min-height: 178px;
}

.icon-dot {
    width: 42px;
    height: 42px;
    border-radius: 15px;
    background: linear-gradient(135deg, var(--primary), rgb(135,185,245));
    box-shadow: 0 12px 24px rgba(70,139,223,.22);
    margin-bottom: 16px;
}

.split {
    display: grid;
    gap: 18px;
    align-items: start;
}

.info-panel {
    padding: 24px;
    background: linear-gradient(145deg, #ffffff, #eef7ff);
}

.stat-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr;
    margin-top: 18px;
}

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

.stat strong {
    display: block;
    color: var(--primary-dark);
    font-size: 24px;
    line-height: 1;
    margin-bottom: 6px;
}

.stat span {
    color: var(--muted);
    font-size: 14px;
}

.use-list {
    display: grid;
    gap: 14px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.use-list li {
    padding: 16px 18px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
    color: #43516a;
}

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

.faq-item {
    padding: 19px;
}

.faq-item h3 {
    margin-bottom: 8px;
    font-size: 18px;
}

.faq-item p {
    margin: 0;
    color: var(--muted);
}

.cta-band {
    padding: 28px;
    border-radius: 28px;
    color: #fff;
    background:
        radial-gradient(circle at 10% 0%, rgba(255,255,255,.22), transparent 34%),
        linear-gradient(135deg, var(--primary), rgb(37,100,185));
    box-shadow: 0 22px 48px rgba(70,139,223,.26);
}

.cta-band p {
    color: rgba(255,255,255,.86);
    margin: 0;
}

.page-hero {
    padding: 48px 0 20px;
}

.page-hero .lead {
    max-width: 780px;
}

.article-layout {
    display: grid;
    gap: 20px;
    padding-bottom: 52px;
}

.article-card {
    padding: 24px;
}

.article-card h2 {
    font-size: 26px;
}

.note-box {
    margin-top: 20px;
    padding: 18px;
    border-radius: 18px;
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.18);
    color: #31506f;
}

.steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding: 18px 18px 18px 58px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
    color: #45546d;
}

.steps li::before {
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 28px;
    height: 28px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}

.warning-list {
    display: grid;
    gap: 12px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.warning-list li {
    padding: 14px 16px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--line);
    color: #43516a;
}

.download-panel {
    text-align: center;
    padding: 30px;
}

.download-panel .download-btn {
    margin-top: 12px;
}

.site-footer {
    border-top: 1px solid rgba(70,139,223,.12);
    background: rgba(255,255,255,.72);
    padding: 34px 0 22px;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

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

.site-footer p {
    color: var(--muted);
    margin: 0;
}

.site-footer h3 {
    font-size: 15px;
    margin-bottom: 10px;
}

.site-footer a {
    display: block;
    color: #54647a;
    margin: 7px 0;
    font-size: 14px;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(70,139,223,.10);
    color: #718096;
    font-size: 13px;
}

@media (min-width: 700px) {
    .container {
        width: min(1120px, calc(100% - 56px));
    }

    .hero {
        padding: 72px 0 52px;
    }

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

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

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

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

@media (min-width: 960px) {
    .nav-toggle {
        display: none;
    }

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

    .site-nav a {
        padding: 9px 12px;
        font-size: 15px;
    }

    .hero-grid {
        grid-template-columns: 1.08fr .92fr;
        gap: 56px;
    }

    .split {
        grid-template-columns: 1fr 1fr;
        gap: 22px;
    }

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

    .article-layout {
        grid-template-columns: minmax(0, 1fr) 340px;
        align-items: start;
    }

    .article-layout .side-panel {
        position: sticky;
        top: 96px;
    }

    .section {
        padding: 56px 0;
    }

    .page-hero {
        padding-top: 70px;
    }
}

@media (max-width: 420px) {
    .container {
        width: min(100% - 24px, 1120px);
    }

    .download-btn {
        width: 100%;
    }

    .card,
    .article-card,
    .info-panel {
        padding: 19px;
    }
}