/* ============================================
   页面通用样式
   ============================================ */
.page-header {
    background: var(--gradient-primary);
    padding: 80px 32px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.page-header-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.page-subtitle {
    font-size: 20px;
    opacity: 0.95;
}

.page-main {
    padding: 80px 32px;
    background: var(--bg-white);
}

.page-container {
    max-width: 900px;
    margin: 0 auto;
}

.content-section {
    margin-bottom: 64px;
}

.section-heading {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.section-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.content-list {
    list-style: none;
    padding-left: 0;
    margin: 24px 0;
}

.content-list li {
    padding: 12px 0 12px 32px;
    position: relative;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.content-list li::before {
    content: '•';
    position: absolute;
    left: 12px;
    color: var(--primary-blue);
    font-size: 24px;
    line-height: 1;
}

/* ============================================
   关于页面样式
   ============================================ */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.value-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    background: white;
}

.value-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.value-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.value-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.careers-list {
    margin-top: 32px;
}

.career-item {
    padding: 24px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.career-item:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.career-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.career-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.career-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s ease;
}

.career-link:hover {
    gap: 8px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.contact-item {
    padding: 24px;
    background: var(--bg-light);
    border-radius: 12px;
}

.contact-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-value {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   帮助页面样式
   ============================================ */
.search-section {
    margin-bottom: 64px;
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box svg {
    position: absolute;
    left: 20px;
    color: var(--text-secondary);
    z-index: 1;
}

.search-input {
    width: 100%;
    padding: 16px 20px 16px 56px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--bg-white);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(26, 115, 232, 0.1);
}

.faq-list {
    margin-top: 32px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: var(--bg-white);
    transition: background 0.2s ease;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.faq-icon {
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 24px;
    margin: 0;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.guide-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.guide-card:hover {
    background: white;
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.guide-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-blue);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 16px;
}

.guide-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.guide-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.guide-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s ease;
}

.guide-link:hover {
    gap: 8px;
}

.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.contact-option {
    padding: 32px;
    background: var(--bg-light);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-option:hover {
    background: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-option-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.contact-option-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-option-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.contact-option-link {
    display: inline-block;
    padding: 10px 24px;
    background: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.contact-option-link:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-2px);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 768px) {
    .page-header {
        padding: 60px 24px;
    }

    .page-title {
        font-size: 36px;
    }

    .page-subtitle {
        font-size: 18px;
    }

    .page-main {
        padding: 60px 24px;
    }

    .section-heading {
        font-size: 28px;
    }

    .values-grid,
    .guide-grid,
    .contact-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 28px;
    }

    .section-heading {
        font-size: 24px;
    }
}

/* ============================================
   下载页面样式
   ============================================ */
.download-auto-section {
    margin-bottom: 64px;
}

.download-auto-card {
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: 48px;
    text-align: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

.auto-detect-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.auto-detect-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.auto-detect-description {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.btn-download-auto {
    padding: 18px 48px;
    background: white;
    color: var(--primary-blue);
    border: none;
    border-radius: 32px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.btn-download-auto:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}

.auto-detect-note {
    font-size: 14px;
    opacity: 0.8;
}

.download-options-section {
    margin-bottom: 64px;
}

.download-platforms {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 32px;
}

.platform-card {
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.platform-card:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.platform-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.platform-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.platform-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.platform-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.2s ease;
}

.platform-option:hover {
    background: var(--bg-lighter);
}

.option-info {
    flex: 1;
}

.option-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.option-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.btn-platform-download {
    padding: 12px 32px;
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-platform-download:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.system-requirements-section {
    margin-bottom: 64px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.requirement-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.requirement-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.requirement-list {
    list-style: none;
    padding: 0;
}

.requirement-list li {
    padding: 12px 0 12px 32px;
    position: relative;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.requirement-list li:last-child {
    border-bottom: none;
}

.requirement-list li::before {
    content: '✓';
    position: absolute;
    left: 8px;
    color: var(--success);
    font-size: 18px;
    font-weight: 600;
}

.installation-section {
    margin-bottom: 64px;
}

.installation-steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 32px;
}

.step-item {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.step-description {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.download-options-box {
    background: var(--bg-light);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--border-color);
}

.options-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.options-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.option-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.6;
}

.option-checkbox input[type="checkbox"] {
    margin-top: 2px;
    cursor: pointer;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.options-note {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.options-note a {
    color: var(--primary-blue);
    text-decoration: none;
}

.options-note a:hover {
    text-decoration: underline;
}

.download-faq-section {
    margin-bottom: 64px;
}

/* 下载页面响应式 */
@media (max-width: 768px) {
    .download-auto-card {
        padding: 32px 24px;
    }

    .auto-detect-title {
        font-size: 24px;
    }

    .platform-card {
        padding: 24px;
    }

    .platform-option {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .btn-platform-download {
        width: 100%;
    }

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

    .step-item {
        flex-direction: column;
        gap: 16px;
    }
}