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

body {
    font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    background: #ffffff;
    color: #1a1f2e;
    line-height: 1.4;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 头部导航 */
header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 0 24px;
    transition: box-shadow 0.3s;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: #0a0b1e;
    letter-spacing: -0.3px;
}

.logo img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #2b3bff, #6c5ce7);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    text-decoration: none;
    color: #2d3a4b;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover {
    color: #2b3bff;
}

.header-btns {
    display: flex;
    gap: 16px;
}

.btn-login,
.btn-download {
    padding: 8px 20px;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-login {
    background: transparent;
    color: #2b3bff;
    border: 1px solid #d0d5dd;
}

.btn-login:hover {
    background: #f5f7ff;
    border-color: #2b3bff;
}

.btn-download {
    background: #2b3bff;
    color: white;
    box-shadow: 0 2px 6px rgba(43, 59, 255, 0.2);
}

.btn-download:hover {
    background: #1e2ad0;
    transform: translateY(-1px);
}

/* 独立面包屑区域（移出 header） */
.breadcrumb {
    padding: 14px 0;
    background: #f8fafc;
    font-size: 0.85rem;
    color: #5a6e8a;
    border-bottom: 1px solid #edf2f7;
}

.breadcrumb a {
    color: #2b3bff;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb strong {
    color: #a0aec0;
    font-weight: 500;
}

/* 下载英雄区 */
.download-hero {
    padding: 60px 0 40px;
    background: linear-gradient(145deg, #fafbff 0%, #ffffff 100%);
    text-align: center;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #eef2ff;
    padding: 6px 16px;
    border-radius: 60px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: #2b3bff;
}

.tag {
    background: #2b3bff;
    color: white;
    padding: 2px 8px;
    border-radius: 30px;
    font-size: 0.7rem;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #0a0b1e, #2b3bff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 20px;
}

.desc {
    font-size: 1.1rem;
    color: #4a5568;
    max-width: 620px;
    margin: 0 auto 40px;
}

/* 下载按钮 - 超醒目版本 */
.download-btns {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-top: 32px;
}

.download-btn {
    background: white;
    border-radius: 64px;
    padding: 28px 32px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
    text-decoration: none;
    color: #1e293b;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
    transition: all 0.25s ease;
    border: 1px solid #e2e8f0;
    min-width: 280px;
    width: auto;
}

.download-btn:hover {
    transform: translateY(-6px);
    box-shadow: 0 28px 40px rgba(43, 59, 255, 0.25);
    border-color: #2b3bff;
    background: #ffffff;
}

.download-btn-icon svg {
    width: 64px;
    height: 64px;
}

.download-btn-text {
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    align-items: center;
}

.download-btn-text span {
    font-size: 0.9rem;
    color: #5b6e8c;
    letter-spacing: 0.5px;
}

.download-btn-text strong {
    font-size: 1.8rem;
    margin-top: 4px;
    font-weight: 800;
}

.platform-info {
    font-size: 0.8rem;
    color: #7c8ba0;
    margin-top: 8px;
    font-weight: 500;
}

.download-count {
    margin-top: 12px;
    font-size: 0.85rem;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    padding: 8px 18px;
    border-radius: 60px;
    color: #2b3bff;
    font-weight: 800;
    display: inline-block;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    letter-spacing: 0.3px;
}



.platform-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    margin-top: 56px;
    padding-top: 20px;
    border-top: 1px dashed #e2e8f0;
}

.pf-item {
    font-size: 0.85rem;
    color: #4a5568;
    background: #f8fafc;
    padding: 6px 14px;
    border-radius: 40px;
    letter-spacing: 0.3px;
}

/* 版本信息卡片 */
.version-info {
    padding: 60px 0;
    background: #ffffff;
}

.version-info-header {
    text-align: center;
    margin-bottom: 48px;
}

.version-info-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.version-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    justify-content: center;
}

.version-card {
    background: #f8fafc;
    border-radius: 28px;
    padding: 24px;
    width: 240px;
    transition: all 0.2s;
    border: 1px solid #eef2ff;
}

.version-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
    border-color: #cddcff;
}

.os-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #0f172a;
}

.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed #e2e8f0;
    font-size: 0.85rem;
}

.info-label {
    color: #5b6e8c;
}

.info-value {
    font-weight: 500;
    color: #1e293b;
}

/* 三步上手 */
.steps {
    padding: 60px 0;
    background: #fafcff;
}

.steps-header {
    text-align: center;
    margin-bottom: 48px;
}

.steps-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
}

.step-card {
    background: white;
    border-radius: 28px;
    padding: 32px 24px;
    text-align: center;
    width: 260px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.03);
    border: 1px solid #eef2ff;
}

.step-number {
    width: 48px;
    height: 48px;
    background: #2b3bff;
    color: white;
    font-size: 1.6rem;
    font-weight: 800;
    border-radius: 60px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

/* 对比表格区域 */
.compare-section {
    padding: 70px 0;
    background: #ffffff;
}

.compare-header {
    text-align: center;
    margin-bottom: 48px;
}

.compare-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(120deg, #1e293b, #2b3bff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.compare-sub {
    color: #4a5568;
    margin-top: 12px;
}

.compare-table-wrapper {
    overflow-x: auto;
    border-radius: 28px;
    border: 1px solid #eef2ff;
    background: #ffffff;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
    position: relative;
}

.compare-table-wrapper::after {
    content: "↔️ 左右滑动查看完整对比";
    position: absolute;
    bottom: -28px;
    right: 0;
    font-size: 0.7rem;
    color: #94a3b8;
    background: white;
    padding: 0 8px;
    white-space: nowrap;
}

@media (min-width: 768px) {
    .compare-table-wrapper::after {
        display: none;
    }
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    min-width: 700px;
}

.compare-table th,
.compare-table td {
    padding: 18px 20px;
    text-align: center;
    border-bottom: 1px solid #edf2f7;
}

.compare-table th {
    background: #f8fafc;
    font-weight: 700;
    color: #1e293b;
    font-size: 1rem;
}

.compare-table td:first-child,
.compare-table th:first-child {
    text-align: left;
    font-weight: 600;
    background: #ffffff;
}

.compare-table tr:last-child td {
    border-bottom: none;
}

.bit-badge {
    background: #2b3bff10;
    color: #2b3bff;
    padding: 4px 10px;
    border-radius: 40px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-left: 6px;
}

.check-icon {
    color: #2b3bff;
    font-weight: 700;
}

.price-highlight {
    font-weight: 800;
    color: #2b3bff;
}

/* 用户反馈 */
.testimonials {
    padding: 70px 0;
    background: #f8faff;
}

.testimonials-header {
    text-align: center;
    margin-bottom: 48px;
}

.testimonials-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
}

.testimonial-card {
    background: white;
    border-radius: 28px;
    padding: 28px;
    width: 320px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.03);
    border: 1px solid #eef2ff;
    transition: all 0.2s;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: #cddcff;
}

.stars {
    color: #f5b042;
    font-size: 1.2rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial-text {
    font-style: normal;
    line-height: 1.55;
    color: #2d3e50;
    margin-bottom: 20px;
}

.testimonial-author {
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    border-top: 1px solid #edf2f7;
    padding-top: 16px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2b3bff20, #6c5ce720);
    border-radius: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #2b3bff;
}

/* FAQ 区块 */
.faq {
    padding: 70px 0;
    background: #ffffff;
}

.faq-header {
    text-align: center;
    margin-bottom: 48px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #eef2ff;
    margin-bottom: 16px;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    cursor: pointer;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.faq-toggle svg {
    width: 24px;
    height: 24px;
    transition: transform 0.2s;
    fill: #7c8ba0;
}

.faq-item.active .faq-toggle svg {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    color: #4a5568;
    line-height: 1.55;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
}

/* 页脚 */
footer {
    background: #0f1222;
    color: #cbd5e1;
    padding: 56px 0 24px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand {
    max-width: 280px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-brand .logo img {
    height: 28px;
    width: auto;
}

.footer-links h4 {
    color: white;
    margin-bottom: 18px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li a {
    color: #94a3b8;
    text-decoration: none;
    line-height: 2;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    h1 {
        font-size: 2.2rem;
    }

    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 0;
        gap: 12px;
    }

    nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 18px;
        flex-wrap: wrap;
    }

    .compare-table th,
    .compare-table td {
        padding: 12px 10px;
        font-size: 0.8rem;
    }

    .step-card {
        width: 100%;
        max-width: 280px;
    }

    .download-btn {
        min-width: 160px;
        padding: 14px 16px;
    }

    .platform-features {
        gap: 12px;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
    }

    .footer-brand {
        max-width: 100%;
    }
}