/* ===== Footer — 欧美风格 ===== */

.footer {
    background: #1a1a1a;
    color: #e5e5e5;
    max-width: 100%;
    overflow-x: hidden;
}

.footer-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 48px 24px 24px;
    box-sizing: border-box;
}

/* 顶部：品牌与标语 */
.footer-top {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.footer-brand:hover {
    color: #fff;
    opacity: 0.9;
}

.footer-tagline {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
    font-weight: 400;
}

/* 导航列 */
.footer-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px 24px;
}

.footer-col {
    min-width: 0;
}

.footer-title {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    margin: 0 0 16px 0;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0;
}

.footer-link {
    display: inline-block;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.72);
    text-decoration: none;
    padding: 6px 0;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #fff;
}

.footer-links-social .footer-link {
    color: rgba(255, 255, 255, 0.72);
}

/* 底栏 */
.footer-bottom {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-copy {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}

/* ===== 响应式：移动端 — 欧美风格重设计 ===== */
@media (max-width: 768px) {
    .footer {
        padding: 0;
        background: #141414;
    }

    .footer-inner {
        padding: 40px 24px 28px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    /* 品牌区：居中、留白、下划线点缀 */
    .footer-top {
        margin-bottom: 32px;
        padding-bottom: 28px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        text-align: center;
    }

    .footer-brand {
        font-size: 1.5rem;
        font-weight: 600;
        letter-spacing: -0.03em;
        color: #fff;
        display: inline-block;
        margin-bottom: 6px;
    }

    .footer-tagline {
        font-size: 0.875rem;
        color: rgba(255, 255, 255, 0.55);
        margin: 0;
        letter-spacing: 0.02em;
    }

    /* 导航：两列网格，区块清晰 */
    .footer-nav {
        grid-template-columns: repeat(2, 1fr);
        gap: 0 20px;
        row-gap: 0;
    }

    .footer-col {
        padding: 20px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-col:nth-child(odd) {
        padding-right: 10px;
    }

    .footer-col:nth-child(even) {
        padding-left: 10px;
    }

    .footer-col:nth-last-child(-n+2) {
        border-bottom: none;
    }

    .footer-title {
        margin: 0 0 14px 0;
        font-size: 0.6875rem;
        font-weight: 600;
        letter-spacing: 0.14em;
        text-transform: uppercase;
        color: rgba(255, 255, 255, 0.45);
    }

    .footer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 6px 18px;
        align-items: center;
    }

    .footer-links li {
        margin: 0;
    }

    .footer-link {
        padding: 10px 0;
        font-size: 0.9375rem;
        font-weight: 400;
        color: rgba(255, 255, 255, 0.78);
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        -webkit-tap-highlight-color: transparent;
        transition: color 0.2s ease;
    }

    .footer-link:active {
        color: #fff;
    }

    .footer-bottom {
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        text-align: center;
    }

    .footer-copy {
        font-size: 0.8125rem;
        color: rgba(255, 255, 255, 0.4);
        line-height: 1.5;
        margin: 0;
    }
}

@media (max-width: 480px) {
    .footer-inner {
        padding: 36px 20px 24px;
    }

    .footer-top {
        margin-bottom: 28px;
        padding-bottom: 24px;
    }

    .footer-brand {
        font-size: 1.375rem;
    }

    .footer-tagline {
        font-size: 0.8125rem;
    }

    .footer-nav {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-col {
        padding: 22px 0 !important;
        padding-right: 0 !important;
        padding-left: 0 !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-col:last-of-type {
        border-bottom: none;
    }

    .footer-title {
        margin-bottom: 14px;
        font-size: 0.6875rem;
        letter-spacing: 0.12em;
    }

    .footer-links {
        gap: 6px 14px;
    }

    .footer-link {
        min-height: 46px;
        padding: 10px 0;
        font-size: 0.9375rem;
    }

    .footer-bottom {
        margin-top: 28px;
        padding-top: 22px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-copy {
        font-size: 0.75rem;
        color: rgba(255, 255, 255, 0.42);
    }
}

/* 超小屏 */
@media (max-width: 360px) {
    .footer-inner {
        padding: 28px 18px 20px;
    }

    .footer-top {
        margin-bottom: 24px;
        padding-bottom: 20px;
    }

    .footer-brand {
        font-size: 1.25rem;
    }

    .footer-tagline {
        font-size: 0.75rem;
    }

    .footer-col {
        padding: 18px 0 !important;
    }

    .footer-links {
        gap: 6px 12px;
    }

    .footer-link {
        min-height: 44px;
        font-size: 0.875rem;
    }

    .footer-bottom {
        margin-top: 24px;
        padding-top: 18px;
    }

    .footer-copy {
        font-size: 0.6875rem;
        color: rgba(255, 255, 255, 0.4);
    }
}