* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: #245fba;
    --primary-soft: #eaf4ff;
    --text: #17243a;
    --muted: #60708a;
    --line: #dfe9f5;
    --card: #ffffff;
    --bg: #f7fbff;
    --shadow: 0 14px 40px rgba(31, 82, 148, .10);
    --radius: 22px;
}

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(--text);
    background: linear-gradient(180deg, #f1f8ff 0%, #ffffff 42%, #f8fbff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

.container {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(210, 226, 245, .78);
}

.header-inner {
    min-height: 66px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: .2px;
    color: #102443;
}

.logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(70,139,223,.18);
}

.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.nav-toggle-label {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    background: #fff;
}

.nav-toggle-label span {
    width: 20px;
    height: 2px;
    border-radius: 99px;
    background: var(--primary-dark);
    display: block;
}

.main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.nav-toggle:checked ~ .main-nav {
    display: flex;
}

.main-nav a {
    padding: 11px 13px;
    border-radius: 13px;
    color: #40506a;
    font-weight: 650;
}

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

.hero {
    padding: 48px 0 30px;
}

.hero-grid {
    display: grid;
    gap: 32px;
    align-items: center;
}

.hero-copy h1,
.page-hero h1 {
    margin: 0 0 16px;
    font-size: clamp(2rem, 8vw, 4.7rem);
    line-height: 1.08;
    letter-spacing: -1.6px;
    color: #0c2548;
}

.hero-copy p,
.page-hero p,
.lead {
    color: var(--muted);
    font-size: 1.04rem;
    margin: 0 0 22px;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0 0 24px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid #d9e9fb;
    color: #335676;
    font-size: .92rem;
    box-shadow: 0 8px 20px rgba(65, 124, 198, .08);
}

.badge::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 99px;
    background: var(--primary);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 16px 30px rgba(70,139,223,.25);
    border: 0;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
    touch-action: manipulation;
}

.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(70,139,223,.32);
}

.hero-visual {
    position: relative;
    min-height: 330px;
    display: grid;
    place-items: center;
}

.phone-card {
    width: min(92vw, 440px);
    padding: 20px;
    border-radius: 32px;
    background: linear-gradient(145deg, #ffffff, #eaf5ff);
    border: 1px solid #d9e9fb;
    box-shadow: 0 28px 70px rgba(43, 93, 165, .16);
}

.float-card {
    position: absolute;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(216,232,250,.95);
    box-shadow: var(--shadow);
    font-size: .92rem;
    color: #315171;
}

.float-card.one {
    left: 0;
    top: 22px;
}

.float-card.two {
    right: 0;
    bottom: 24px;
}

.section {
    padding: 34px 0;
}

.section-title {
    margin: 0 0 12px;
    font-size: clamp(1.55rem, 4vw, 2.45rem);
    line-height: 1.2;
    color: #102848;
}

.section-intro {
    margin: 0 0 22px;
    color: var(--muted);
    max-width: 760px;
}

.grid,
.feature-grid {
    display: grid;
    gap: 16px;
}

.card {
    background: var(--card);
    border: 1px solid rgba(217, 232, 250, .9);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
}

.card.soft {
    background: linear-gradient(180deg, #ffffff 0%, #f0f7ff 100%);
}

.card h2,
.card h3 {
    margin-top: 0;
    margin-bottom: 10px;
    line-height: 1.28;
    color: #132c4f;
}

.card p,
.card li {
    color: var(--muted);
}

.card p:last-child {
    margin-bottom: 0;
}

.stat-grid {
    display: grid;
    gap: 14px;
}

.stat {
    padding: 18px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid #d9e9fb;
}

.stat strong {
    display: block;
    font-size: 1.6rem;
    color: var(--primary-dark);
}

.stat span {
    color: var(--muted);
    font-size: .93rem;
}

.page-hero {
    padding: 44px 0 18px;
}

.page-hero .crumb {
    color: var(--primary-dark);
    font-weight: 800;
    margin-bottom: 12px;
}

.content-wrap {
    display: grid;
    gap: 18px;
    padding-bottom: 42px;
}

.article-card {
    background: #fff;
    border: 1px solid rgba(217,232,250,.9);
    border-radius: 24px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.article-card h2 {
    margin-top: 4px;
    color: #132c4f;
}

.article-card p {
    color: var(--muted);
}

.note-box {
    padding: 18px;
    border-radius: 20px;
    background: #eef7ff;
    border: 1px solid #cfe5fb;
    color: #365a78;
}

.step-list {
    counter-reset: steps;
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.step-list li {
    counter-increment: steps;
    padding: 16px 16px 16px 54px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid #dceaf8;
    position: relative;
    color: var(--muted);
}

.step-list li::before {
    content: counter(steps);
    position: absolute;
    left: 16px;
    top: 15px;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}

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

.faq-item {
    background: #fff;
    border: 1px solid #dbeafa;
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 28px rgba(31,82,148,.07);
}

.faq-item h2,
.faq-item h3 {
    margin: 0 0 8px;
    color: #132c4f;
    font-size: 1.08rem;
}

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

.cta-panel {
    border-radius: 28px;
    padding: 26px;
    background: linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.92));
    border: 1px solid #d2e7fb;
    box-shadow: var(--shadow);
}

.cta-panel h2 {
    margin-top: 0;
}

.site-footer {
    margin-top: 24px;
    padding: 38px 0 22px;
    background: #10243f;
    color: rgba(255,255,255,.78);
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    margin-bottom: 12px;
}

.footer-brand img {
    width: 36px;
    height: 36px;
    border-radius: 12px;
}

.site-footer h3 {
    color: #fff;
    margin: 0 0 12px;
    font-size: 1rem;
}

.site-footer a {
    display: block;
    color: rgba(255,255,255,.72);
    margin: 8px 0;
}

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

.footer-bottom {
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.12);
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: .9rem;
}

@media (min-width: 700px) {
    .container {
        width: min(100% - 56px, 1180px);
    }
    .hero {
        padding-top: 70px;
    }
    .grid,
    .feature-grid,
    .stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .content-wrap {
        grid-template-columns: 1fr 320px;
        align-items: start;
    }
    .article-card {
        padding: 32px;
    }
    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, 1fr);
    }
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 980px) {
    .header-inner {
        min-height: 76px;
    }
    .nav-toggle-label {
        display: none;
    }
    .main-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .main-nav a {
        padding: 9px 13px;
    }
    .hero-grid {
        grid-template-columns: 1.05fr .95fr;
        gap: 54px;
    }
    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .section {
        padding: 48px 0;
    }
    .page-hero {
        padding: 62px 0 24px;
    }
}