/* 错见 / Corriger — Landing Styles */

:root {
    --color-brand-blue: #1D4ED8;
    --color-bg: #FFF6EA;
    --color-card: #FFFAF2;
    --color-amber: #F59E0B;
    --color-amber-deep: #B45309;
    --color-ink: #1F2937;       /* 主视觉句·冷灰墨 */
    --color-earth: #57534E;      /* 功能句·暖灰土 */
    --color-text-mid: #4B5563;
    --color-text-muted: #78716C; /* 暖灰，匹配米白底 */
    --color-text-soft: #A8A29E;
    --color-border: rgba(0, 0, 0, 0.06);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
                 "Source Han Sans CN", "思源黑体", "Microsoft YaHei",
                 "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-ink);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ---------- Hero ---------- */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 24px 24px;
}

.brand-mark {
    color: var(--color-brand-blue);
    font-weight: 500;
    letter-spacing: 0.08em;
    line-height: 1.4;
    text-align: center;
}

.brand-mark .brand-zh {
    font-size: 22px;
    margin-right: 10px;
}

.brand-mark .brand-en {
    font-size: 15px;
    letter-spacing: 0.04em;
    opacity: 0.85;
}

.hero-center {
    flex: 1;
    width: 100%;
    max-width: 880px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 24px 0;
}

.soul {
    font-size: clamp(36px, min(7vw, 9vh), 64px);
    font-weight: 900;
    color: var(--color-ink);
    letter-spacing: 0.06em;
    line-height: 1.4;
    margin-bottom: clamp(24px, 4vh, 40px);
}

.slogan {
    margin-bottom: clamp(28px, 6vh, 56px);
}

.slogan-zh {
    font-size: clamp(15px, 1.8vw, 19px);
    letter-spacing: 0.18em;
    margin-bottom: 6px;
    color: var(--color-text-muted);
}

.slogan-en {
    font-size: clamp(12px, 1.3vw, 14px);
    letter-spacing: 0.08em;
    color: var(--color-text-soft);
    font-style: italic;
}

.function {
    font-size: clamp(16px, min(2.2vw, 3vh), 22px);
    color: var(--color-earth);
    letter-spacing: 0.05em;
    line-height: 1.7;
    margin-bottom: clamp(20px, 3vh, 28px);
}

.cta {
    display: inline-block;
    padding: 12px 28px;
    border: 1.5px solid var(--color-amber);
    border-radius: 999px;
    color: var(--color-amber-deep);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.04em;
    background: var(--color-card);
    transition: background 0.2s, transform 0.2s;
}

.cta strong {
    color: var(--color-amber-deep);
    font-weight: 700;
    margin: 0 2px;
}

.cta:hover {
    background: #FBEBC2;
}

/* 入口按钮组：网页版（主）+ 小程序（次） */
.cta-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.cta-primary {
    background: var(--color-brand-blue);
    border-color: var(--color-brand-blue);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.cta-primary:hover {
    background: #1740b8;
}

/* ---------- Footer ---------- */
.footer {
    padding: 16px 24px 20px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
    line-height: 1.8;
    border-top: 1px solid var(--color-border);
}

.footer .company {
    color: var(--color-text-mid);
    font-weight: 500;
    margin-bottom: 2px;
}

.footer .links {
    margin: 2px 0;
}

.footer .links a {
    color: var(--color-brand-blue);
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer .links a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.footer .links .sep {
    margin: 0 8px;
    color: #D1D5DB;
}

.footer .icp {
    color: #9CA3AF;
    font-size: 12px;
}

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
    .hero {
        padding: 24px 20px 16px;
    }

    .brand-mark .brand-zh {
        font-size: 19px;
    }

    .brand-mark .brand-en {
        font-size: 13px;
    }

    .soul {
        letter-spacing: 0.04em;
    }

    .cta {
        display: block;
        width: 100%;
        max-width: 320px;
        padding: 13px 24px;
    }

    .footer {
        padding: 14px 20px 18px;
        font-size: 12px;
    }
}

/* 短屏防溢出（如笔记本横屏窗口） */
@media (max-height: 640px) {
    .hero {
        padding: 20px 24px 16px;
    }
}

/* ---------- Legal pages (privacy / terms) ---------- */
.page-content {
    text-align: left;
    max-width: 720px;
    margin: 0 auto;
    padding: 60px 20px 80px;
}

.page-content h1 {
    font-size: 28px;
    color: var(--color-brand-blue);
    margin-bottom: 8px;
}

.page-content .subtitle {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}

.page-content h2 {
    font-size: 18px;
    color: var(--color-brand-blue);
    margin-top: 32px;
    margin-bottom: 12px;
}

.page-content p {
    color: #374151;
    margin-bottom: 12px;
    line-height: 1.8;
}

.page-content .back-link {
    display: inline-block;
    margin-top: 32px;
    color: var(--color-brand-blue);
    text-decoration: none;
    font-size: 14px;
}

.page-content .back-link:hover {
    text-decoration: underline;
}