/* ==========================================
   Downloads 页专属样式
   ========================================== */

/* ---------- Hero (已对齐全站高级风格) ---------- */
.dl-hero {
    position: relative;
    min-height: 520px; /* 和 About 页保持一致 */
    display: flex;
    align-items: center;
    padding: 100px 20px;
    overflow: hidden;
    color: #fff;
    background: #0a1f3d;
}
.dl-hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(15,42,74,0.92) 0%, rgba(15,42,74,0.6) 55%, rgba(15,42,74,0.35) 100%);
    z-index: 2;
}
/* 背景图通过 html 里的 style 加载，这里不需要::after了 */
.dl-hero-content {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* 标签小字 */
.dl-hero-label {
    display: inline-block;
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: #38bdf8;
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 12px;
    letter-spacing: 1.5px;
    margin-bottom: 22px;
    font-weight: 600;
    text-transform: uppercase;
}

/* 主标题 */
.dl-hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin: 0 0 20px;
    color: #fff;
}

/* 副标题 */
.dl-hero p {
    font-size: 17px;
    color: #cbd5e1;
    max-width: 680px;
    line-height: 1.7;
    margin: 0 0 28px;
}

/* 按钮组 */
.dl-hero-cta { 
    display: flex; 
    gap: 14px; 
    flex-wrap: wrap; 
    margin-bottom: 40px; 
}
.dl-hero-btn { 
    display: inline-block; 
    background: #1d6fe8; 
    color: #fff; 
    padding: 14px 30px; 
    border-radius: 6px; 
    text-decoration: none; 
    font-size: 15px; 
    font-weight: 600; 
    transition: all 0.25s; 
    border: 1px solid #1d6fe8; 
}
.dl-hero-btn:hover { 
    background: #1557b8; 
    border-color: #1557b8; 
    transform: translateY(-2px); 
}
.dl-hero-btn-outline { 
    display: inline-block; 
    background: transparent; 
    color: #fff; 
    padding: 14px 30px; 
    border-radius: 6px; 
    text-decoration: none; 
    font-size: 15px; 
    font-weight: 600; 
    border: 1px solid rgba(255,255,255,0.4); 
    transition: all 0.25s; 
}
.dl-hero-btn-outline:hover { 
    background: rgba(255,255,255,0.1); 
    border-color: #fff; 
    transform: translateY(-2px); 
}

/* 底部特性标签 */
.dl-hero-features {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.15);
}
.dl-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: #cbd5e1;
    line-height: 1.4;
    font-weight: 500;
}
.dl-feature-icon {
    font-size: 20px;
    color: #38bdf8;
}
.dl-feature strong { color: #fff; }

/* ---------- Grid Section ---------- */
.dl-grid-section {
    padding: 80px 20px;
    background: var(--c-bg-soft);
}
.dl-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

/* ---------- Card ---------- */
.dl-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: 14px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    transition: all 0.35s;
}
.dl-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -16px rgba(15,42,74,0.18);
    border-color: var(--c-primary);
}

/* 封面 */
.dl-cover {
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 22px;
    background: #f1f5f9;
    position: relative;
    box-shadow: 0 10px 30px -12px rgba(15, 42, 74, 0.25);
}
.dl-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}
.dl-cover canvas.dl-pdf-canvas {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.dl-card:hover .dl-cover img,
.dl-card:hover .dl-cover canvas.dl-pdf-canvas {
    transform: scale(1.03);
}
.dl-cover .dl-pdf-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #94a3b8;
    font-size: 13px;
}

/* 内容区 */
.dl-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--c-dark);
    margin: 0 0 10px;
    line-height: 1.35;
}
.dl-card > p {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.6;
    margin: 0 0 16px;
    flex-grow: 1;
}
.dl-meta {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: #94a3b8;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f1f5f9;
}
.dl-btn {
    display: block;
    text-align: center;
    background: var(--c-primary);
    color: #fff;
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s, transform 0.2s;
}
.dl-btn:hover {
    background: var(--c-primary-hover);
    transform: translateY(-1px);
}

/* ---------- CTA ---------- */
.dl-cta {
    max-width: 1200px;
    margin: 0 auto;
}
.dl-cta-inner {
    background: #eef2ff;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    padding: 32px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}
.dl-cta-left {
    display: flex;
    gap: 22px;
    align-items: flex-start;
    flex: 1;
    min-width: 300px;
}
.dl-cta-icon {
    font-size: 40px;
    flex-shrink: 0;
    color: var(--c-primary);
}
.dl-cta-label {
    font-size: 12px;
    color: var(--c-primary);
    font-weight: 700;
    letter-spacing: 1.5px;
    margin-bottom: 8px;
}
.dl-cta h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--c-dark);
    margin: 0 0 8px;
}
.dl-cta p {
    font-size: 14px;
    color: #475569;
    margin: 0;
    line-height: 1.5;
}
.dl-cta-btn {
    display: inline-block;
    background: var(--c-primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    transition: background 0.2s;
}
.dl-cta-btn:hover { background: var(--c-primary-hover); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .dl-hero h1 { font-size: 42px; }
    .dl-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (max-width: 700px) {
    .dl-hero { min-height: 340px; padding: 60px 20px; }
    .dl-hero h1 { font-size: 34px; }
    .dl-hero p { font-size: 15px; }
    .dl-hero-features { gap: 20px; }
    .dl-grid { grid-template-columns: 1fr; gap: 20px; }
    .dl-cta-inner { padding: 24px; flex-direction: column; align-items: flex-start; }
    .dl-cta-btn { width: 100%; text-align: center; }
}