/* ========== 下载 Hero 区域 ========== */
.download-hero {
    padding: 120px 0 80px;
    background: 
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(0, 170, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(0, 170, 255, 0.08) 0%, transparent 40%),
        linear-gradient(180deg, #0a0a0a 0%, #0d1520 50%, #0a0a0a 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 170, 255, 0.3), transparent);
}

.download-hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.download-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 170, 255, 0.1);
    border: 1px solid rgba(0, 170, 255, 0.2);
    color: #00AAFF;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.download-badge svg {
    width: 16px;
    height: 16px;
}

.download-hero-title {
    font-size: 48px;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.download-hero-title .highlight {
    background: linear-gradient(135deg, #00AAFF 0%, #00d4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-hero-subtitle {
    font-size: 18px;
    color: #888888;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 40px;
}

/* ========== 主下载卡片 ========== */
.download-main-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 48px;
    max-width: 500px;
    margin: 0 auto;
    position: relative;
}

.download-main-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #00AAFF, transparent);
    border-radius: 2px;
}

.download-version {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 170, 255, 0.1);
    color: #00AAFF;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.download-version svg {
    width: 16px;
    height: 16px;
}

.download-product-name {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
}

.download-product-desc {
    font-size: 15px;
    color: #888888;
    margin-bottom: 28px;
}

.download-btn-main {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    max-width: 300px;
    padding: 18px 36px;
    background: linear-gradient(135deg, #00AAFF 0%, #0088cc 100%);
    color: #ffffff;
    font-size: 18px;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(0, 170, 255, 0.3);
    margin-bottom: 24px;
}

.download-btn-main:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 170, 255, 0.4);
}

.download-btn-main svg {
    width: 22px;
    height: 22px;
}

.download-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.download-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #888888;
    font-size: 13px;
}

.download-meta-item svg {
    width: 16px;
    height: 16px;
    color: #00AAFF;
}

/* 系统要求 */
.system-requirements {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.system-title {
    font-size: 13px;
    color: #666666;
    margin-bottom: 16px;
}

.system-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.system-icon {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #888888;
    font-size: 13px;
}

.system-icon svg {
    width: 16px;
    height: 16px;
    color: #00AAFF;
}

/* ========== 历史版本区域 ========== */
.history-section {
    padding: 80px 0;
    background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

.history-header {
    text-align: center;
    margin-bottom: 40px;
}

.history-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.history-header p {
    font-size: 16px;
    color: #666666;
}

.history-accordion {
    max-width: 700px;
    margin: 0 auto;
}

.history-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 28px;
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.history-toggle:hover {
    border-color: rgba(0, 170, 255, 0.3);
    box-shadow: 0 4px 12px rgba(0, 170, 255, 0.08);
}

.history-toggle.active {
    border-radius: 12px 12px 0 0;
    border-bottom-color: transparent;
}

.history-toggle-text {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
}

.history-toggle-text svg {
    width: 20px;
    height: 20px;
    color: #00AAFF;
}

.history-toggle-icon {
    width: 20px;
    height: 20px;
    color: #888888;
    transition: transform 0.3s ease;
}

.history-toggle.active .history-toggle-icon {
    transform: rotate(180deg);
}

.history-content {
    display: none;
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-top: none;
    border-radius: 0 0 12px 12px;
    overflow: hidden;
}

.history-content.show {
    display: block;
}

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

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.2s ease;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item:hover {
    background: #f8f9fa;
}

.history-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.history-item-version {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a1a;
}

.history-item-tag {
    font-size: 11px;
    font-weight: 600;
    color: #00AAFF;
    background: rgba(0, 170, 255, 0.1);
    padding: 4px 10px;
    border-radius: 4px;
}

.history-item-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(0, 170, 255, 0.1);
    color: #00AAFF;
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.history-item-btn:hover {
    background: #00AAFF;
    color: #ffffff;
}

.history-item-btn svg {
    width: 16px;
    height: 16px;
}

/* ========== 提示区域 ========== */
.tips-section {
    padding: 80px 0;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.tip-card {
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.tip-card:hover {
    border-color: rgba(0, 170, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 170, 255, 0.1);
}

.tip-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 170, 255, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.tip-icon svg {
    width: 28px;
    height: 28px;
    color: #00AAFF;
}

.tip-title {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.tip-desc {
    font-size: 14px;
    color: #666666;
    line-height: 1.6;
}

/* ========== 响应式样式 ========== */
@media (max-width: 900px) {
    .download-hero {
        padding: 100px 0 60px;
    }

    .download-hero-title {
        font-size: 36px;
    }

    .tips-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .download-hero-title {
        font-size: 32px;
    }

    .download-hero-subtitle {
        font-size: 16px;
    }

    .download-main-card {
        padding: 36px 24px;
    }

    .download-product-name {
        font-size: 24px;
    }

    .download-meta {
        gap: 16px;
    }

    .system-icons {
        gap: 12px;
    }

    .history-header h2 {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .download-hero {
        padding: 80px 0 50px;
    }

    .download-hero-title {
        font-size: 28px;
    }

    .download-main-card {
        padding: 28px 20px;
    }

    .download-btn-main {
        padding: 16px 28px;
        font-size: 16px;
    }

    .download-meta {
        flex-direction: column;
        gap: 10px;
    }

    .history-toggle,
    .history-item {
        padding: 16px 20px;
    }

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