/* ==========================================
   Service Detail 通用样式
   ========================================== */

/* ---------- Hero (已对齐 About 页面风格 + 标题渐变) ---------- */
.sd-hero {
    position: relative;
    min-height: 620px; /* 和 About 页保持一致的高度 */
    display: flex;
    align-items: center;
    padding: 100px 20px;
    overflow: hidden;
    color: #fff;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-color: var(--c-dark);
}
.sd-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: 1;
}
.sd-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}
.sd-hero-breadcrumb {
    font-size: 12px;
    color: #94a3b8;
    margin-bottom: 22px;
    letter-spacing: 0.5px;
}
.sd-hero-breadcrumb a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s;
}
.sd-hero-breadcrumb a:hover { color: var(--c-primary-light); }
.sd-hero-breadcrumb span { color: #cbd5e1; }

/* 标签小字 */
.sd-hero-label {
    display: inline-block;
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: var(--c-primary-light);
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 12px;
    letter-spacing: 1.5px;
    margin-bottom: 22px;
    font-weight: 600;
}

/* 主标题 (纯白色) */
.sd-hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 20px;
    letter-spacing: -0.5px;
    max-width: 820px;
    color: #ffffff; 
}

/* 最后一个词的渐变色：浅蓝过渡到深蓝 */
.text-gradient {
    /* 从浅青蓝 (#38bdf8) 渐变到 科技深蓝 (#1d6fe8) */
    background: linear-gradient(90deg, #38bdf8 0%, #1d6fe8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    
    /* 加一点发光，让深色在暗背景下也能跳出来 */
    filter: drop-shadow(0 2px 8px rgba(56, 189, 248, 0.2));
}

/* 副标题 */
.sd-hero p {
    font-size: 17px;
    color: #cbd5e1;
    line-height: 1.7;
    max-width: 680px;
    margin: 0 0 32px;
}

/* 按钮行 */
.sd-hero-cta-row {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.sd-hero-btn {
    display: inline-block;
    background: var(--c-primary);
    color: #fff;
    padding: 14px 30px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: background 0.25s, transform 0.25s;
    border: 1px solid var(--c-primary);
}
.sd-hero-btn:hover { 
    background: var(--c-primary-hover); 
    transform: translateY(-2px);
}
.sd-hero-response {
    color: #94a3b8;
    font-size: 13px;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ---------- Gallery（轮播版） ---------- */
.sd-gallery {
    padding: 50px 20px 20px;
    background: var(--c-bg-soft);
}
.sd-gallery-inner {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}
.sd-gallery-carousel {
    position: relative;
    padding: 0 60px;
}
.sd-gallery-viewport {
    overflow: hidden;
    border-radius: 12px;
}
.sd-gallery-track {
    display: flex;
    gap: 24px;
    transition: transform 0.5s ease;
    will-change: transform;
}
.sd-gallery-item {
    flex: 0 0 calc((100% - 48px) / 3);
    height: 300px;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--c-border);
    transition: transform 0.3s, box-shadow 0.3s;
}
.sd-gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -16px rgba(29,111,232,0.2);
}
.sd-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s;
}
.sd-gallery-item:hover img {
    transform: scale(1.05);
}

.sd-gallery-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1px solid #cbd5e1;
    background: #ffffff;
    color: var(--c-dark);
    cursor: pointer;
    font-size: 16px;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    box-shadow: 0 6px 16px -6px rgba(15, 23, 42, 0.15);
}
.sd-gallery-arrow:hover {
    background: var(--c-dark);
    color: #fff;
    border-color: var(--c-dark);
}
.sd-gallery-prev { left: 0; }
.sd-gallery-next { right: 0; }

.sd-gallery-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}
.sd-gallery-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #cbd5e1;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.sd-gallery-dots .dot.active {
    background: var(--c-primary);
    transform: scale(1.4);
}

/* ---------- Overview + Capabilities ---------- */
.sd-intro {
    padding: 60px 20px 80px;
    background: var(--c-bg-soft);
}
.sd-intro-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: start;
}
.sd-label {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--c-primary);
    font-weight: 700;
    margin-bottom: 12px;
}
.sd-intro-text h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--c-dark);
    margin: 0 0 24px;
    line-height: 1.2;
}
.sd-intro-text p {
    font-size: 15px;
    color: #475569;
    line-height: 1.9;
    margin: 0 0 32px;
}
.sd-intro-text h3 {
    font-size: 18px;
    color: var(--c-dark);
    margin: 44px 0 20px;
    font-weight: 700;
    letter-spacing: 0.2px;
}
.sd-features {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
}
.sd-features li {
    position: relative;
    padding: 10px 0 10px 28px;
    font-size: 14px;
    color: #334155;
    line-height: 1.65;
}
.sd-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 10px;
    width: 20px;
    height: 20px;
    background: #e0f2fe;
    color: var(--c-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

/* Materials 材质行 */
.sd-materials {
    font-size: 14px !important;
    color: var(--c-dark) !important;
    font-weight: 600;
    background: #e0f2fe;
    border-left: 3px solid var(--c-primary);
    padding: 14px 18px;
    border-radius: 0 8px 8px 0;
    margin: 0 0 8px !important;
    letter-spacing: 0.2px;
    line-height: 1.7 !important;
}

/* ---------- Capabilities 卡片 ---------- */
.sd-capabilities {
    background: var(--c-dark);
    border-radius: 14px;
    padding: 40px 36px;
    color: #fff;
    position: sticky;
    top: 100px;
}
.sd-capabilities h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
}
.sd-specs {
    list-style: none;
    padding: 0;
    margin: 0 0 28px;
}
.sd-specs li {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: 14px;
}
.sd-specs li:last-child { border-bottom: none; }
.sd-specs span { color: #94a3b8; }
.sd-specs strong { color: #fff; font-weight: 600; text-align: right; }

.sd-spec-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.sd-spec-btn {
    display: block;
    text-align: center;
    background: var(--c-primary);
    color: #fff;
    text-decoration: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s;
}
.sd-spec-btn:hover { background: var(--c-primary-hover); }
.sd-spec-btn-outline {
    display: block;
    text-align: center;
    background: transparent;
    color: var(--c-primary-light);
    text-decoration: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid var(--c-primary-light);
    transition: all 0.2s;
}
.sd-spec-btn-outline:hover { background: var(--c-primary-light); color: var(--c-dark); }

/* ==========================================
   Typical Applications 独立区块（一屏 4 张）
   ========================================== */
.sd-app-section {
    padding: 80px 20px;
    background: #ffffff;
}
.sd-app-section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.sd-app-carousel {
    position: relative;
    padding: 0 48px;
}
.sd-app-viewport {
    overflow: hidden;
    padding: 6px 0;
}
.sd-app-track {
    display: flex;
    gap: 18px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}
.sd-app-card {
    flex: 0 0 calc((100% - 54px) / 4);
    background: #ffffff;
    border: 1px solid var(--c-border);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 12px -6px rgba(15,42,74,0.08);
}
.sd-app-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-primary);
    box-shadow: 0 20px 40px -16px rgba(29,111,232,0.28);
}
.sd-app-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--c-border);
    position: relative;
}
.sd-app-img::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 40px;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.15));
    pointer-events: none;
}
.sd-app-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.sd-app-card:hover .sd-app-img img { transform: scale(1.08); }
.sd-app-name {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--c-dark);
    line-height: 1.35;
    letter-spacing: 0.2px;
    padding: 14px 12px 16px;
    text-align: center;
    position: relative;
}
.sd-app-name::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 2px;
    background: var(--c-primary);
    border-radius: 2px;
    transition: width 0.3s;
}
.sd-app-card:hover .sd-app-name::before { width: 48px; }

.sd-app-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--c-border);
    background: #ffffff;
    color: var(--c-dark);
    cursor: pointer;
    font-size: 13px;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
    padding: 0;
    box-shadow: 0 4px 12px -4px rgba(15,23,42,0.15);
}
.sd-app-arrow:hover {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
    box-shadow: 0 8px 20px -6px rgba(29,111,232,0.4);
}
.sd-app-prev { left: 0; }
.sd-app-next { right: 0; }

.sd-app-dots {
    display: flex;
    justify-content: center;
    gap: 7px;
    margin-top: 20px;
}
.sd-app-dots .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #cbd5e1;
    cursor: pointer;
    transition: background 0.25s, width 0.25s;
}
.sd-app-dots .dot:hover { background: #94a3b8; }
.sd-app-dots .dot.active {
    background: var(--c-primary);
    width: 20px;
    border-radius: 4px;
}

/* ---------- Process Flow（自适应列数） ---------- */
.sd-process {
    padding: 80px 20px;
    background: #ffffff;
}
.sd-process-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.sd-section-header {
    text-align: center;
    margin-bottom: 60px;
}
.sd-section-header h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--c-dark);
    margin: 0 0 14px;
}
.sd-section-header p {
    font-size: 15px;
    color: var(--c-text-muted);
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.6;
}
.sd-process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.sd-process-card {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: 14px;
    padding: 30px 22px;
    transition: all 0.3s;
    position: relative;
}
.sd-process-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-primary);
    box-shadow: 0 20px 40px -16px rgba(29,111,232,0.2);
    background: #fff;
}
.sd-process-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--c-primary);
    line-height: 1;
    margin-bottom: 16px;
    opacity: 0.9;
}
.sd-process-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-dark);
    margin: 0 0 10px;
    line-height: 1.3;
}
.sd-process-card p {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.55;
    margin: 0;
}

/* ---------- Sample Parts（严格三行三列网格） ---------- */
.sd-samples { padding: 80px 20px; background: #ffffff; }
.sd-samples-inner { max-width: 1200px; margin: 0 auto; }
.sd-samples-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.sd-sample-item {
    aspect-ratio: 4 / 3;
    border-radius: 12px;
    overflow: hidden;
    background: #f1f5f9;
    border: 1px solid var(--c-border);
    transition: transform 0.3s, box-shadow 0.3s;
}
.sd-sample-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -16px rgba(29,111,232,0.18);
}
.sd-sample-item a {
    display: block;
    width: 100%;
    height: 100%;
    cursor: zoom-in;
}
.sd-sample-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
.sd-sample-item:hover img { transform: scale(1.05); }

/* ---------- QC Equipment ---------- */
.sd-qc-equipment {
    padding: 40px 20px;
    background: #f1f5f9;
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}
.sd-qc-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: space-between;
}
.sd-qc-icon {
    font-size: 32px;
    width: 64px; height: 64px;
    background: #ffffff;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.sd-qc-text { flex: 1; min-width: 240px; }
.sd-qc-title {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--c-primary);
    font-weight: 700;
    margin-bottom: 6px;
}
.sd-qc-desc {
    font-size: 15px;
    color: var(--c-dark);
    font-weight: 600;
    line-height: 1.5;
}
.sd-qc-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.sd-qc-badge {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    color: var(--c-dark);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 600;
}

/* ---------- CTA ---------- */
.sd-cta {
    padding: 80px 20px;
    background: linear-gradient(135deg, #0a2540 0%, #1e3c72 100%);
    color: #fff;
    text-align: center;
}
.sd-cta h2 {
    font-size: 34px;
    font-weight: 800;
    margin: 0 0 16px;
}
.sd-cta p {
    font-size: 16px;
    color: #cbd5e1;
    margin: 0 auto 32px;
    max-width: 620px;
    line-height: 1.6;
}
.sd-cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.sd-cta-primary {
    background: var(--c-primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: background 0.2s;
}
.sd-cta-primary:hover { background: var(--c-primary-hover); }
.sd-cta-secondary {
    background: transparent;
    color: #fff;
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.4);
    transition: all 0.2s;
}
.sd-cta-secondary:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
    .sd-app-card { flex: 0 0 calc((100% - 36px) / 3); }   /* 一屏 3 张 */
}

@media (max-width: 1100px) {
    .sd-hero h1 { font-size: 38px; }
    .sd-gallery-item { flex: 0 0 calc((100% - 24px) / 2); }
    .sd-intro-inner { grid-template-columns: 1fr; gap: 40px; }
    .sd-capabilities { position: static; }
    
    /* 平板尺寸下，产品区变成 2 列 */
    .sd-samples-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
    .sd-app-card { flex: 0 0 calc((100% - 18px) / 2); }   /* 一屏 2 张 */
}

@media (max-width: 700px) {
    .sd-hero { min-height: 340px; padding: 60px 20px; }
    .sd-hero h1 { font-size: 28px; }
    .sd-hero p { font-size: 14px; }
    .sd-hero-cta-row { gap: 12px; }
    .sd-gallery-carousel { padding: 0 50px; }
    .sd-gallery-item { flex: 0 0 100%; height: 220px; }
    .sd-gallery-arrow { width: 40px; height: 40px; font-size: 14px; }
    .sd-intro { padding: 50px 20px; }
    .sd-intro-text h2 { font-size: 24px; }
    .sd-intro-text h3 { margin: 36px 0 16px; }
    .sd-capabilities { padding: 30px 24px; }

    .sd-app-section { padding: 60px 20px; }
    .sd-app-carousel { padding: 0 38px; }
    .sd-app-card { flex: 0 0 100%; }                      /* 一屏 1 张 */
    .sd-app-arrow { width: 34px; height: 34px; font-size: 12px; }
    .sd-app-img { aspect-ratio: 16 / 10; }

    .sd-process-grid { grid-template-columns: 1fr; gap: 16px; }
    .sd-section-header h2 { font-size: 24px; }
    
    /* 手机尺寸下，产品区变成 1 列 */
    .sd-samples { padding: 60px 20px; }
    .sd-samples-grid { grid-template-columns: 1fr; }
    
    .sd-qc-inner { justify-content: center; text-align: center; }
    .sd-qc-badges { justify-content: center; }
    .sd-cta h2 { font-size: 24px; }
    .sd-cta-buttons { flex-direction: column; align-items: stretch; }
}