:root {
    --brand-gold: #D4AF37;
    --brand-gold-deep: #b58d1a;
    --brand-ink: #231b08;
    --brand-cream: #f8f3e2;
    --brand-sand: #efe4bf;
    --panel-shadow: 0 20px 50px rgba(35, 27, 8, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--brand-ink);
    background:
        radial-gradient(circle at top left, rgba(212, 175, 55, 0.28), transparent 34%),
        linear-gradient(180deg, #fffaf0 0%, #f7f0d9 48%, #f3ead1 100%);
}

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

.site-shell {
    min-height: 100vh;
}

.topbar {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.brand-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-mark {
    width: 64px;
    height: 64px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand-gold), #f1d57a);
    color: #fff;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: var(--panel-shadow);
}

.brand-name {
    font-size: 30px;
    font-weight: 700;
    line-height: 1.1;
}

.brand-sub {
    font-size: 14px;
    color: rgba(35, 27, 8, 0.72);
}

.lang-switch {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.lang-btn {
    border: 1px solid rgba(212, 175, 55, 0.45);
    background: rgba(255, 255, 255, 0.72);
    color: var(--brand-ink);
    border-radius: 999px;
    padding: 10px 16px;
    font-size: 14px;
    transition: all 0.2s ease;
}

.lang-btn.active,
.lang-btn:hover {
    background: var(--brand-gold);
    color: #fff;
    border-color: var(--brand-gold);
}

.hero-banner,
.intro-panel,
.cta-panel,
.features-panel,
.site-footer {
    width: min(1180px, calc(100% - 32px));
    margin-left: auto;
    margin-right: auto;
}

.hero-banner img {
    width: 100%;
    display: block;
    border-radius: 28px;
    box-shadow: var(--panel-shadow);
}

.intro-panel {
    margin-top: 28px;
    padding: 40px 42px;
    border-radius: 28px;
    background: rgba(255, 253, 246, 0.86);
    border: 1px solid rgba(212, 175, 55, 0.18);
    box-shadow: var(--panel-shadow);
}

.section-kicker {
    color: var(--brand-gold-deep);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.hero-title {
    margin: 0 0 18px;
    font-size: clamp(32px, 5vw, 58px);
    line-height: 1.08;
}

.hero-text {
    margin: 0 0 14px;
    font-size: 18px;
    line-height: 1.85;
    color: rgba(35, 27, 8, 0.82);
}

.cta-panel {
    padding: 34px 0;
    display: flex;
    justify-content: center;
}

.cta-button {
    min-width: min(100%, 420px);
    text-align: center;
    padding: 22px 28px;
    border-radius: 24px;
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--brand-gold-deep), var(--brand-gold));
    box-shadow: 0 20px 40px rgba(181, 141, 26, 0.28);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 24px 48px rgba(181, 141, 26, 0.34);
}

.features-panel {
    padding: 18px 0 56px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.feature-card {
    padding: 28px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(250, 243, 217, 0.95));
    border: 1px solid rgba(212, 175, 55, 0.22);
    box-shadow: var(--panel-shadow);
}

.feature-card h2 {
    margin: 0 0 12px;
    font-size: 26px;
}

.feature-card p {
    margin: 0;
    font-size: 17px;
    line-height: 1.8;
    color: rgba(35, 27, 8, 0.8);
}

.site-footer {
    padding: 28px 0 40px;
    border-top: 1px solid rgba(212, 175, 55, 0.24);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    font-size: 15px;
}

.site-footer a {
    color: var(--brand-gold-deep);
    font-weight: 600;
}

@media screen and (max-width: 768px) {
    .topbar {
        padding-top: 18px;
        flex-direction: column;
        align-items: flex-start;
    }

    .brand-name {
        font-size: 26px;
    }

    .hero-banner img,
    .intro-panel,
    .feature-card {
        border-radius: 22px;
    }

    .intro-panel {
        padding: 28px 22px;
    }

    .hero-text {
        font-size: 16px;
    }

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

    .feature-card h2 {
        font-size: 22px;
    }

    .feature-card p {
        font-size: 16px;
    }

    .site-footer {
        flex-direction: column;
        align-items: flex-start;
        padding-bottom: 28px;
    }
}