:root {
    --main-blue: #0066ff;
    --main-blue-light: #3385ff;
    --main-blue-dark: #0052cc;
    --text-dark: #1a1a2e;
    --text-gray: #6b7280;
    --bg-page: #f5f7fa;
    --bg-white: #ffffff;
    --border-light: #e5e7eb;
    --gold: #d4a017;
    --gold-light: #f0c850;
    --red-badge: #e74c3c;
    --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 25px rgba(0, 102, 255, 0.15);
    --radius-main: 14px;
    --radius-small: 10px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(160deg, #f5f7fa 0%, #e4e8ec 50%, #dde1e7 100%);
    min-height: 100vh;
    padding: 50px 30px;
    color: var(--text-dark);
}

body > *:not(.page-wrapper) {
    display: none !important;
}

.page-wrapper {
    max-width: 1180px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.header {
    text-align: center;
    margin-bottom: 55px;
    padding: 35px 0;
}

.header h1 {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--main-blue);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.header p {
    font-size: 1.05rem;
    color: var(--text-gray);
    font-weight: 500;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 22px;
    margin-bottom: 75px;
}

.tool-card {
    background: var(--bg-white);
    border-radius: var(--radius-main);
    padding: 26px 18px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    box-shadow: var(--shadow-soft);
    border: 1px solid transparent;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--main-blue-light);
}

.badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: linear-gradient(135deg, var(--red-badge) 0%, #c0392b 100%);
    color: #fff;
    font-size: 0.7rem;
    padding: 4px 9px;
    border-radius: 10px;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(231, 76, 60, 0.35);
}

.tool-icon {
    font-size: 3.2rem;
    margin-bottom: 18px;
    display: block;
    transition: transform 0.25s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.08);
}

.tool-icon img {
    width: 52px;
    height: 52px;
    border-radius: 10px;
}

.tool-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.3;
}

.tool-desc {
    font-size: 0.85rem;
    color: var(--text-gray);
    line-height: 1.5;
}

.partner-section {
    margin-top: 65px;
    padding-top: 45px;
    border-top: 1px solid var(--border-light);
}

.partner-title {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--main-blue);
    text-align: center;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.partner-subtitle {
    font-size: 0.9rem;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: 35px;
    font-weight: 500;
}

.partner-grid {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
}

.partner-card {
    background: var(--bg-white);
    border-radius: var(--radius-main);
    border-top: 4px solid var(--gold);
    padding: 30px 26px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
    max-width: 360px;
    width: 100%;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(212, 160, 23, 0.2);
}

.partner-icon-wrapper {
    width: 82px;
    height: 82px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: linear-gradient(145deg, #2c3e50 0%, #1a252f 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.partner-card:hover .partner-icon-wrapper {
    transform: scale(1.05);
}

.partner-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.partner-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.partner-desc {
    font-size: 0.85rem;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 18px;
    min-height: 45px;
}

.partner-btn {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: #1a1a2e;
    border: none;
    padding: 9px 22px;
    border-radius: 18px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(212, 160, 23, 0.3);
}

.partner-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(212, 160, 23, 0.4);
}

.partner-arrow {
    color: var(--gold);
    font-size: 1rem;
    font-weight: 700;
    display: inline-block;
    transition: transform 0.3s ease;
}

.partner-card:hover .partner-arrow {
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }

    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 16px;
    }

    .tool-card {
        padding: 20px 12px;
    }

    .tool-icon {
        font-size: 2.6rem;
    }

    .partner-title {
        font-size: 1.4rem;
    }

    .partner-card {
        padding: 24px 20px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 24px 14px;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .tool-card {
        padding: 16px 10px;
    }

    .tool-name {
        font-size: 0.95rem;
    }

    .tool-desc {
        font-size: 0.75rem;
    }

    .header {
        margin-bottom: 35px;
        padding: 20px 0;
    }

    .header h1 {
        font-size: 1.65rem;
    }

    .partner-grid {
        padding: 0 8px;
    }
}