/* ==========================================================================
   STAGE SUB-SITE STYLES (PRD 5.1 - 5.4)
   ========================================================================== */

/* --- Stage Hero --- */
.stage-hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.stage-hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
    padding: 0 2rem;
}

.stage-hero-tag {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    margin-bottom: 1.5rem;
    color: var(--theme-color);
    text-transform: uppercase;
}

.stage-hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.stage-hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 3rem;
    font-weight: 300;
}

.stage-hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--theme-color);
    color: white;
    padding: 1.2rem 2.8rem;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 10px 30px rgba(255, 87, 34, 0.3);
}

.stage-hero-cta:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255, 87, 34, 0.5);
}

/* --- Section Headers --- */
.stage-section-header {
    text-align: center;
    margin-bottom: 4.5rem;
    padding: 0 1.5rem;
}

.stage-tag {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: rgba(255, 87, 34, 0.1);
    color: var(--theme-color);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.stage-section-header h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.stage-section-header p {
    color: #666;
    font-size: 1.1rem;
}

/* --- 5.1 Service Scale Cards --- */
.stage-services {
    padding: 100px 0;
    background: #fdfdfd;
}

.stage-scale-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

.stage-scale-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    border: 1px solid #eee;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.stage-scale-card.featured {
    border-color: var(--theme-color);
    box-shadow: 0 20px 50px rgba(0,0,0,0.05);
    background: #fff;
    transform: translateY(-10px);
}

.stage-scale-card.featured::before {
    content: '推荐方案';
    position: absolute;
    top: 15px;
    right: -30px;
    background: var(--theme-color);
    color: white;
    padding: 5px 40px;
    font-size: 0.75rem;
    font-weight: 700;
    transform: rotate(45deg);
}

.scale-icon {
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 87, 34, 0.1);
    margin-bottom: 1rem;
    line-height: 1;
}

.stage-scale-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.scale-info {
    display: block;
    color: var(--theme-color);
    font-weight: 700;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.scale-list {
    list-style: none;
    padding: 0;
    margin-top: 1.5rem;
    border-top: 1px solid #f0f0f0;
    padding-top: 1.5rem;
}

.scale-list li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9rem;
    color: #555;
}

.scale-list li::before {
    content: "\f058";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--theme-color);
    opacity: 0.6;
}

.stage-scale-card:hover { border-color: var(--theme-color); }

/* --- 5.2 Equipment Library --- */
.stage-equipment {
    padding: 100px 0;
}

.stage-equipment-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.stage-eq-tab-btn {
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    border: 1px solid #ddd;
    background: transparent;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.stage-eq-tab-btn.active {
    background: #1a1a1a;
    color: white;
    border-color: #1a1a1a;
}

.stage-equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

.eq-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid #eee;
    transition: all 0.3s ease;
}

.eq-image {
    height: 200px;
    overflow: hidden;
}

.eq-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.eq-card:hover .eq-image img { transform: scale(1.1); }

.eq-content {
    padding: 1.8rem;
}

.eq-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
}

.eq-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
}

.eq-specs span {
    font-size: 0.8rem;
    background: #f5f5f5;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    color: #666;
}

.eq-content p {
    font-size: 0.95rem;
    color: #777;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.eq-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f0f0f0;
    padding-top: 1.2rem;
}

.eq-price {
    font-weight: 800;
    color: var(--theme-color);
    font-size: 1.1rem;
}

.eq-btn {
    padding: 0.5rem 1.2rem;
    background: #1a1a1a;
    color: white;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity 0.3s;
}

/* --- 5.3 Case Gallery --- */
.stage-cases {
    padding: 120px 0;
    background: var(--light-gray);
    color: var(--text-main);
}

.stage-cases .stage-section-header h2 { color: var(--text-main); }
.stage-cases .stage-section-header p { color: var(--text-sec); }

.stage-filters {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin-bottom: 4rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    font-size: 0.85rem;
    color: var(--text-sec);
    font-weight: 700;
    text-transform: uppercase;
}

.filter-group select {
    background: #fff;
    color: var(--text-main);
    border: 1px solid #ddd;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    min-width: 180px;
    outline: none;
    cursor: pointer;
}

.stage-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

.case-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}

.case-media {
    position: relative;
    height: 240px;
    cursor: pointer;
}

.case-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.case-card:hover .case-image {
    transform: scale(1.08);
}

.case-info {
    padding: 2.5rem;
}

.case-info h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--text-main);
}

.case-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.badge {
    font-size: 0.75rem;
    border: 1px solid #ddd;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    color: var(--text-sec);
}

.case-info p {
    color: var(--text-sec);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.8rem;
}

.case-docs {
    display: flex;
    gap: 1.2rem;
}

.doc-link {
    color: var(--theme-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-link:hover { text-decoration: underline; }

/* --- 5.4 Quote Form --- */
.stage-quote { padding: 100px 0; }

.stage-quote-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.quote-form-wizard {
    background: white;
    border: 1px solid #eee;
    border-radius: 25px;
    padding: 3rem;
    box-shadow: 0 30px 60px rgba(0,0,0,0.05);
}

.quote-step { display: none; }
.quote-step.active {
    display: block;
    animation: fadeInUp 0.5s ease both;
}

.quote-step h3 {
    font-size: 1.6rem;
    margin-bottom: 2rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid #f5f5f5;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group { margin-bottom: 1.8rem; }

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 700;
    font-size: 0.95rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 1rem 1.2rem;
    border: 1px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    background: #fafafa;
}

.radio-group, .checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.radio-chip input, .check-item input {
    display: none;
}

.radio-chip span, .check-item span {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.radio-chip input:checked + span,
.check-item input:checked + span {
    background: var(--theme-color);
    color: white;
    border-color: var(--theme-color);
}

.primary-check + span {
    border-color: var(--theme-color);
    color: var(--theme-color);
    font-weight: 700;
}

.input-mix {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.or-text { font-size: 0.8rem; color: #999; flex-shrink: 0; }

.file-upload-box {
    border: 2px dashed #ddd;
    padding: 2.5rem;
    text-align: center;
    border-radius: 15px;
    position: relative;
    cursor: pointer;
}

.file-upload-box i { font-size: 2.5rem; color: #bbb; margin-bottom: 1rem; }
.file-upload-box input {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; cursor: pointer;
}

/* Success Screen */
.success-screen {
    text-align: center;
    padding: 2rem 0;
}

.success-icon {
    font-size: 5rem;
    color: #4CAF50;
    margin-bottom: 1.5rem;
}

.back-home-btn {
    display: inline-block;
    margin-top: 2rem;
    color: var(--theme-color);
    font-weight: 700;
    text-decoration: none;
}

.form-nav {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
    border-top: 1px solid #f0f0f0;
    padding-top: 2rem;
}

.form-btn-next, .form-btn-submit {
    background: #1a1a1a;
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
}

.form-btn-prev {
    background: #f5f5f5;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
}




/* --- Responsive --- */
@media (max-width: 1100px) {
    .stage-scale-grid { grid-template-columns: repeat(2, 1fr); }
    .stage-cases-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .stage-scale-grid { grid-template-columns: 1fr; }
    .stage-cases-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .hero-video { object-fit: cover; }
    .stage-hero-title { font-size: 2.8rem; }
    .stage-hero-cta { width: 100%; }
    .quote-form-wizard { padding: 1.5rem; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}