:root {
    --primary: #1a3b8b;
    --primary-light: #2c5fd4;
    --accent: #eab308;
    --bg: #fafbfc;
    --surface: #ffffff;
    --text: #0f172a;
    --text-muted: #5b6c84;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 16px rgba(0,0,0,0.04);
    --shadow-hover: 0 8px 28px rgba(0,0,0,0.08);
    --radius: 12px;
    --radius-lg: 16px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; display: block; }

.site-header {
    background: #0f172a;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #1e293b;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem 0;
}

.logo a {
    font-size: 1.55rem;
    font-weight: 700;
    color: #f8fafc;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo a i { color: var(--primary-light); }

.main-nav ul {
    display: flex;
    gap: 0.2rem;
    list-style: none;
    align-items: center;
}

.main-nav a {
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-weight: 500;
    color: #fff;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
}

.main-nav a:hover {
    background: rgba(255,255,255,0.1);
    color: #f1f5f9;
}

.main-nav a.active {
    background: var(--primary-light);
    color: white;
    box-shadow: 0 4px 10px rgba(44,95,212,0.4);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    color: #cbd5e1;
    cursor: pointer;
}

@media (max-width: 992px) {
    .main-nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 66px;
        left: 0;
        width: 100%;
        background: #0f172a;
        padding: 1.2rem 28px;
        box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        border-radius: 0 0 16px 16px;
        gap: 0.3rem;
        border: 1px solid #1e293b;
    }
    .main-nav ul.active { display: flex; }
    .menu-toggle { display: block; }
    .main-nav a { 
        padding: 0.8rem 1rem; 
        border-radius: 0.75rem; 
        width: 100%; 
        color: #94a3b8;
    }
    .main-nav a:hover { background: rgba(255,255,255,0.05); }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.25s;
    cursor: pointer;
    border: none;
    line-height: 1.4;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-light);
    color: white;
    box-shadow: 0 4px 14px rgba(44,95,212,0.25);
}
.btn-primary:hover {
    background: #1e42b0;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(44,95,212,0.35);
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--surface);
}
.btn-outline:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
    background: #f8fafc;
}

.btn-full {
    width: 100%;
    padding: 0.9rem;
    font-size: 1rem;
    margin-top: 0.5rem;
}

.hero-section {
    background: linear-gradient(180deg, #f0f4ff 0%, #fafbfc 100%);
    padding: 4rem 0 4rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero-section h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.03em;
    margin-bottom: 1.2rem;
    line-height: 1.25;
    padding-bottom: 0;
}
.hero-section h1::after { display: none; }

.hero-intro {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 720px;
    margin: 0 auto 2rem;
}

.hero-features {
    list-style: none;
    max-width: 600px;
    margin: 0 auto 2rem;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-features li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1rem;
    color: var(--text);
    line-height: 1.5;
}

.hero-features li i {
    color: #2c5fd4;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    line-height: 1.3;
    text-align: center;
    margin: 2.5rem auto 2rem;
    max-width: 90%;
    padding-bottom: 1.2rem;
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 220px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    border-radius: 3px;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 4rem 0 2rem;
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    border-left: 4px solid var(--primary-light);
    padding-left: 1.2rem;
}

.section-heading i { color: var(--primary-light); font-size: 1.4rem; }

.section-heading.testimonials-heading {
    justify-content: center;
    border-left: none;
    padding-left: 0;
}
.section-heading.testimonials-heading span {
    background: linear-gradient(90deg, #0070C0, #17365D, #0070C0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.25s, transform 0.25s;
}
.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.grid-2 { display: grid; gap: 1.75rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin: 1.5rem 0; }
.grid-3 { display: grid; gap: 1.75rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin: 1.5rem 0; }

.feature-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.card .feature-icon {
    font-size: 1.8rem;
    color: var(--primary-light);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: #eef2ff;
    flex-shrink: 0;
    margin-bottom: 0;
}

.feature-header h3 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text);
}

.latest-version-card {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    color: white;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    margin: 1.5rem 0 3rem;
    border: 1px solid rgba(255,255,255,0.08);
}

.latest-version-card .version-info h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: #94a3b8;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.latest-version-card .version-info .version-number {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, #ffffff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.latest-version-card .version-info p {
    color: #cbd5e1;
    font-size: 1rem;
    max-width: 500px;
    line-height: 1.6;
}

.latest-version-card .version-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.latest-version-card .btn-primary {
    background: white;
    color: #0f172a;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.latest-version-card .btn-primary:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
}

.latest-version-card .release-date {
    font-size: 0.85rem;
    color: #94a3b8;
}

.timeline {
    position: relative;
    padding-left: 44px;
    margin: 2rem 0 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-light), transparent);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--surface);
    border: 3px solid var(--primary-light);
    box-shadow: 0 0 0 4px rgba(44,95,212,0.1);
}

.timeline-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.15rem;
}

.timeline-content .timeline-meta {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 0.3rem;
}

.timeline-content .btn {
    font-size: 0.8rem;
    padding: 0.35rem 1rem;
    margin-top: 0.2rem;
}

.links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 0.75rem;
    margin: 1.5rem 0 3rem;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.88rem;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}
.link-item:hover {
    border-color: var(--primary-light);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    transform: translateY(-1px);
}

.link-logo { height: 18px; width: auto; border-radius: 2px; }
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0 3rem;
}

.case-card {
    text-align: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem 1rem;
    transition: all 0.25s;
    box-shadow: var(--shadow-sm);
}
.case-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.case-logo {
    width: 120px;
    height: 44px;
    object-fit: contain;
    margin: 0 auto 0.8rem;
    border: 1px solid #f1f5f9;
    border-radius: 6px;
    padding: 2px;
    background: #fff;
}

.case-logo-placeholder {
    width: 120px;
    height: 44px;
    margin: 0 auto 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 6px;
    color: var(--primary-light);
    font-size: 1.2rem;
}

.case-name { font-weight: 600; font-size: 0.95rem; color: var(--text); }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 1.5rem 0 2rem;
    font-size: 0.92rem;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--primary-light); }
.breadcrumb span { color: var(--text-muted); }
.breadcrumb i { font-size: 0.7rem; margin: 0 0.2rem; }

.doc-article {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin: 2rem 0;
}

.doc-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary);
    text-align: center;
    padding-bottom: 0.5rem;
}

.doc-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    color: var(--text-muted);
    font-size: 0.92rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.meta-item i { margin-right: 0.4rem; color: var(--primary-light); }

.doc-content { 
    line-height: 1.8; 
    color: var(--text); 
}

.doc-content img { 
    border-radius: 0.8rem; 
    margin: 1rem auto; 
    max-width: 100%; 
    display: block;
}

.doc-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.2rem;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Fira Code', 'Cascadia Code', Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 1.5rem 0;
    border: 1px solid #334155;
}

.doc-content code {
    font-family: 'Fira Code', 'Cascadia Code', Consolas, monospace;
    font-size: 0.9em;
    background: #f1f5f9;
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: #1e293b;
}

.doc-content pre code {
    background: transparent;
    padding: 0;
    font-size: 0.9rem;
    color: inherit;
}

.article-list { display: flex; flex-direction: column; gap: 1.5rem; margin: 2rem 0; }
.article-item {
    display: flex;
    gap: 1.5rem;
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: box-shadow 0.2s;
}
.article-item:hover { box-shadow: var(--shadow-hover); }
.article-item .article-thumb {
    width: 160px;
    height: 100px;
    object-fit: cover;
    border-radius: 0.75rem;
    flex-shrink: 0;
    background: #f1f5f9;
}
.article-item .article-body { flex: 1; }
.article-item .article-body h3 { margin-bottom: 0.4rem; }
.article-item .article-body p { color: var(--text-muted); font-size: 0.95rem; }

/* ---------- 分页 ---------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 2.5rem 0 1rem;
}
.pagination a,
.pagination span {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 0.9rem;
}
.pagination a:hover {
    background: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
}
.pagination .current {
    background: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
}

.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 0.8rem 0;
}
.faq-question {
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    color: var(--text);
}
.faq-answer {
    display: none;
    padding: 0.4rem 0 1rem 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.contact-info-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.2rem;
    transition: box-shadow 0.2s, transform 0.2s;
    box-shadow: var(--shadow-sm);
}

.contact-info-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.contact-info-item i {
    font-size: 1.4rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef2ff;
    color: var(--primary-light);
    border-radius: 10px;
    flex-shrink: 0;
}

.info-text {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    word-break: break-all;
}

.contact-form-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.contact-form .form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-form .form-row input {
    flex: 1;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    background: var(--bg);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(44,95,212,0.1);
    background: #fff;
}

.contact-form textarea {
    margin-bottom: 1rem;
    resize: vertical;
}

.captcha-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.captcha-img {
    height: 44px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.user-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.user-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.user-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.user-site-logo {
    width: 200px;
    height: 60px;
    object-fit: contain;
    margin: 0 auto 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px;
    background: #fff;
}
.user-site-logo-placeholder {
    width: 200px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef2ff;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--primary-light);
    font-size: 2rem;
}

.user-card h3 { margin-bottom: 0.8rem; font-size: 1.2rem; }
.user-intro { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1.5rem; line-height: 1.5; }

.version-badge {
    background: #dbeafe;
    color: #1e40af;
    padding: 0.2rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.site-footer {
    background: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 2.8rem 0;
    margin-top: 5rem;
    font-size: 0.95rem;
}
.site-footer a { color: #cbd5e1; font-weight: 500; }
.site-footer a:hover { color: white; }

.alert {
    background: #ecfdf5;
    color: #065f46;
    padding: 0.8rem 1rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .hero-section h1 { font-size: 2rem; }
    .hero-intro { font-size: 1rem; }
    h1 { font-size: 1.7rem; }
    .section-heading { font-size: 1.4rem; margin: 3rem 0 1.5rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .article-item { flex-direction: column; }
    .article-item .article-thumb { width: 100%; height: auto; }
    .doc-article { padding: 1.5rem; }
    .doc-title { font-size: 1.6rem; }
    .latest-version-card {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2rem 1.5rem;
    }
    .latest-version-card .version-actions { flex-direction: row; justify-content: center; }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .user-cards { grid-template-columns: 1fr; }
    .contact-form .form-row {
        flex-direction: column;
    }
    .contact-info-row {
        grid-template-columns: 1fr;
    }
}