:root {
    --bg: #eef6fb;
    --bg-strong: #0f7fbd;
    --panel: #ffffff;
    --panel-blue: #dff4ff;
    --text: #123044;
    --muted: #607383;
    --primary: #229ed9;
    --primary-dark: #0878b4;
    --accent: #23b48b;
    --line: rgba(34, 158, 217, 0.18);
    --shadow: 0 24px 60px rgba(20, 78, 112, 0.14);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 999px;
}

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

body {
    min-height: 100vh;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.75;
    background:
        radial-gradient(circle at 12% 8%, rgba(35, 180, 139, 0.18), transparent 28%),
        radial-gradient(circle at 88% 0%, rgba(34, 158, 217, 0.22), transparent 34%),
        linear-gradient(180deg, #f7fcff 0%, var(--bg) 54%, #ffffff 100%);
}

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

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

.container {
    width: min(1160px, calc(100% - 36px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(247, 252, 255, 0.88);
    border-bottom: 1px solid rgba(34, 158, 217, 0.14);
    backdrop-filter: blur(18px);
}

.nav-wrap {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-dark);
}

.brand img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(34, 158, 217, 0.2);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.nav-links a {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-weight: 700;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--primary-dark);
    background: rgba(34, 158, 217, 0.1);
}

.hero {
    padding: 92px 0 76px;
}

.compact-hero {
    padding-bottom: 58px;
}

.hero-grid,
.split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(310px, 0.92fr);
    gap: 44px;
    align-items: center;
}

.hero-copy {
    max-width: 720px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    margin-bottom: 18px;
    border-radius: var(--radius-sm);
    color: var(--primary-dark);
    background: rgba(34, 158, 217, 0.12);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.eyebrow.light {
    color: #e8fbff;
    background: rgba(255, 255, 255, 0.16);
}

h1,
h2,
h3 {
    color: var(--text);
    line-height: 1.18;
}

h1 {
    max-width: 820px;
    margin-bottom: 20px;
    font-size: clamp(38px, 6vw, 66px);
    letter-spacing: -0.05em;
}

h2 {
    margin-bottom: 16px;
    font-size: clamp(30px, 4vw, 46px);
    letter-spacing: -0.035em;
}

h3 {
    margin-bottom: 12px;
    font-size: 21px;
}

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

.lead,
.section-head p,
.section-blue p {
    font-size: 18px;
}

.hero-actions {
    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 22px;
    border-radius: var(--radius-sm);
    font-weight: 800;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 16px 32px rgba(34, 158, 217, 0.25);
}

.btn-secondary,
.btn-ghost {
    color: var(--primary-dark);
    background: #ffffff;
    border: 1px solid var(--line);
}

.hero-list,
.notice-card ul {
    list-style: none;
}

.hero-list {
    display: grid;
    gap: 12px;
    margin-top: 28px;
}

.hero-list li,
.notice-card li {
    position: relative;
    padding-left: 24px;
    color: var(--muted);
}

.hero-list li::before,
.notice-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 12px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.app-panel {
    display: flex;
    justify-content: center;
}

.phone-card,
.download-summary,
.card,
.info-card,
.download-card,
.faq-item,
.notice-card {
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.phone-card {
    width: min(100%, 400px);
    padding: 34px;
    transform: rotate(2deg);
}

.phone-card img,
.download-summary img {
    width: 78px;
    height: 78px;
    margin-bottom: 22px;
    border-radius: 22px;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.tag-row span,
.platform {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    color: var(--primary-dark);
    background: rgba(34, 158, 217, 0.1);
    font-size: 14px;
    font-weight: 800;
}

.section {
    padding: 76px 0;
}

.section-head {
    max-width: 780px;
    margin-bottom: 34px;
}

.feature-grid,
.info-grid,
.download-grid,
.faq-grid,
.footer-grid {
    display: grid;
    gap: 22px;
}

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

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

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

.card,
.info-card,
.download-card,
.faq-item {
    padding: 28px;
}

.info-card strong {
    display: inline-block;
    margin-bottom: 16px;
    color: var(--primary);
    font-size: 34px;
    line-height: 1;
}

.download-card {
    display: flex;
    min-height: 280px;
    flex-direction: column;
    align-items: flex-start;
}

.download-card .btn {
    width: 100%;
    margin-top: auto;
}

.platform {
    margin-bottom: 16px;
}

.section-blue {
    color: #ffffff;
    background:
        radial-gradient(circle at 12% 18%, rgba(35, 180, 139, 0.38), transparent 28%),
        linear-gradient(135deg, #076ea6 0%, #064b79 100%);
}

.section-blue h2,
.section-blue h3 {
    color: #ffffff;
}

.section-blue p,
.section-blue li {
    color: rgba(255, 255, 255, 0.82);
}

.notice-card {
    padding: 30px;
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.18);
    box-shadow: none;
}

.notice-card ul {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.download-summary {
    padding: 32px;
    background: linear-gradient(180deg, #ffffff, #e8f7ff);
}

.site-footer {
    padding: 48px 0;
    background: #0e2a3b;
}

.footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
}

.site-footer h3 {
    color: #ffffff;
}

.site-footer p,
.site-footer a {
    display: block;
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.72);
}

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

@media (max-width: 1040px) {
    .feature-grid,
    .download-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .info-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .nav-wrap,
    .hero-grid,
    .split-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .nav-wrap {
        min-height: auto;
        padding: 16px 0;
        align-items: flex-start;
        flex-direction: column;
    }

    .hero,
    .section {
        padding: 54px 0;
    }

    .phone-card {
        transform: none;
    }
}

@media (max-width: 560px) {
    .container {
        width: min(100% - 28px, 1160px);
    }

    .feature-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }
}