/* ============================================
   portfolio.css - 產品案例展示頁專用樣式
   TerminalBridge Trade Copier — v6
   ============================================ */

/* ---- 頁面頂部 ---- */
.portfolio-header {
    padding-top: 140px;
    padding-bottom: 80px;
    background: var(--pro-gradient-hero);
    position: relative;
    overflow: hidden;
}

.portfolio-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: var(--pro-gradient-grid);
    background-size: 60px 60px;
    opacity: 0.3;
    pointer-events: none;
}

.portfolio-header .container {
    position: relative;
    z-index: 2;
}

.portfolio-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(212, 168, 67, 0.12);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: 50px;
    font-size: 13px;
    color: var(--pro-accent-gold);
    margin-bottom: 20px;
}

.portfolio-title {
    font-size: var(--pro-text-5xl);
    font-weight: var(--pro-weight-extrabold);
    color: var(--pro-white);
    line-height: 1.15;
    margin-bottom: 20px;
    max-width: 800px;
}

.portfolio-title .highlight {
    background: linear-gradient(135deg, var(--pro-accent-gold), var(--pro-accent-gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-subtitle {
    font-size: var(--pro-text-lg);
    color: var(--pro-gray-400);
    max-width: 600px;
    line-height: 1.7;
}

/* ---- 產品概述區 ---- */
.overview-section {
    padding: 100px 0;
    background: var(--pro-gradient-dark);
}

.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.overview-card {
    padding: 40px 36px;
    border-radius: var(--pro-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.02);
    position: relative;
    overflow: hidden;
    transition: all var(--pro-transition-base);
}

.overview-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(212, 168, 67, 0.15);
}

.overview-card .overview-icon {
    font-size: 32px;
    margin-bottom: 16px;
    display: block;
}

.overview-card h4 {
    font-size: var(--pro-text-xl);
    font-weight: var(--pro-weight-semibold);
    color: var(--pro-white);
    margin-bottom: 12px;
}

.overview-card p {
    color: var(--pro-gray-400);
    font-size: var(--pro-text-sm);
    line-height: 1.7;
}

.overview-card ul {
    list-style: none;
    padding: 0;
    margin: 12px 0 0;
}

.overview-card ul li {
    color: var(--pro-gray-400);
    font-size: var(--pro-text-sm);
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
}

.overview-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--pro-accent-emerald);
    font-weight: bold;
}

.overview-card ul li strong {
    color: var(--pro-gray-200);
}

/* ---- 使用要求表 ---- */
.requirements-section {
    padding: 80px 0;
    background: var(--pro-gray-800);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.requirement-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 20px;
    border-radius: var(--pro-radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--pro-transition-base);
}

.requirement-item:hover {
    border-color: rgba(212, 168, 67, 0.15);
    background: rgba(255, 255, 255, 0.04);
}

.requirement-item .req-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: var(--pro-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    background: rgba(212, 168, 67, 0.12);
    color: var(--pro-accent-gold);
}

.requirement-item .req-text {
    font-size: var(--pro-text-sm);
    color: var(--pro-gray-300);
    line-height: 1.5;
}

.requirement-item .req-text strong {
    color: var(--pro-white);
}

/* ---- 解決方案亮點（功能特點） ---- */
.solution-section {
    padding: 100px 0;
    background: var(--pro-gray-800);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.solution-card {
    padding: 36px 32px;
    border-radius: var(--pro-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.02);
    transition: all var(--pro-transition-base);
}

.solution-card:hover {
    border-color: rgba(212, 168, 67, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.solution-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--pro-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.solution-icon.purple {
    background: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
}

.solution-icon.gold {
    background: rgba(212, 168, 67, 0.15);
    color: var(--pro-accent-gold);
}

.solution-icon.cyan {
    background: rgba(6, 182, 212, 0.15);
    color: var(--pro-accent-cyan);
}

.solution-icon.emerald {
    background: rgba(16, 185, 129, 0.15);
    color: var(--pro-accent-emerald);
}

.solution-card h4 {
    font-size: var(--pro-text-xl);
    font-weight: var(--pro-weight-semibold);
    color: var(--pro-white);
    margin-bottom: 8px;
}

.solution-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-bottom: 14px;
}

.solution-tag.purple {
    background: rgba(139, 92, 246, 0.12);
    color: #a78bfa;
}

.solution-tag.gold {
    background: rgba(212, 168, 67, 0.12);
    color: var(--pro-accent-gold);
}

.solution-tag.cyan {
    background: rgba(6, 182, 212, 0.12);
    color: var(--pro-accent-cyan);
}

.solution-tag.emerald {
    background: rgba(16, 185, 129, 0.12);
    color: var(--pro-accent-emerald);
}

.solution-feature-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
}

.solution-feature-list li {
    color: var(--pro-gray-400);
    font-size: var(--pro-text-sm);
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
}

.solution-feature-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--pro-accent-gold);
    font-weight: bold;
    font-size: 16px;
}

.solution-feature-list li strong {
    color: var(--pro-gray-200);
}

/* ---- 開發歷程時間線 ---- */
.timeline-section {
    padding: 100px 0;
    background: var(--pro-gray-900);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--pro-accent-gold), rgba(212, 168, 67, 0.1));
}

.timeline-item {
    position: relative;
    padding: 24px 0 24px 40px;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 30px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 3px solid var(--pro-accent-gold);
    background: var(--pro-gray-900);
    z-index: 2;
}

.timeline-dot.completed {
    background: var(--pro-accent-gold);
}

.timeline-content {
    padding: 20px 24px;
    border-radius: var(--pro-radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all var(--pro-transition-base);
}

.timeline-content:hover {
    border-color: rgba(212, 168, 67, 0.15);
    background: rgba(255, 255, 255, 0.04);
}

.timeline-stage {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.03em;
    background: rgba(212, 168, 67, 0.12);
    color: var(--pro-accent-gold);
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: var(--pro-text-base);
    font-weight: var(--pro-weight-semibold);
    color: var(--pro-white);
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: var(--pro-text-sm);
    color: var(--pro-gray-400);
    line-height: 1.6;
    margin-bottom: 6px;
}

.timeline-date {
    font-size: 12px;
    color: var(--pro-gray-500);
}

/* ---- 關鍵數字區 ---- */
.stats-showcase {
    padding: 80px 0;
    background: var(--pro-gradient-hero-alt);
    position: relative;
}

.stats-showcase::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: var(--pro-gradient-grid);
    background-size: 60px 60px;
    opacity: 0.2;
    pointer-events: none;
}

.stats-showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 2;
}

.stat-showcase-item {
    text-align: center;
    padding: 30px 20px;
}

.stat-showcase-number {
    font-size: 48px;
    font-weight: var(--pro-weight-bold);
    background: linear-gradient(135deg, var(--pro-accent-gold), var(--pro-accent-gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    line-height: 1.1;
    margin-bottom: 6px;
}

.stat-showcase-label {
    font-size: var(--pro-text-sm);
    color: var(--pro-gray-400);
    letter-spacing: 0.03em;
}

/* ---- 技術規格摘要 ---- */
.spec-section {
    padding: 80px 0;
    background: var(--pro-gray-800);
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.spec-item {
    padding: 20px;
    border-radius: var(--pro-radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    text-align: center;
}

.spec-label {
    font-size: 12px;
    color: var(--pro-gray-500);
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.spec-value {
    font-size: var(--pro-text-base);
    color: var(--pro-gray-200);
    font-weight: var(--pro-weight-medium);
}

/* ---- 輸入參數表 ---- */
.params-section {
    padding: 80px 0;
    background: var(--pro-gray-900);
}

.params-table-wrapper {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.params-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--pro-text-sm);
}

.params-table thead th {
    padding: 14px 16px;
    text-align: left;
    background: rgba(212, 168, 67, 0.08);
    color: var(--pro-accent-gold);
    font-weight: var(--pro-weight-semibold);
    border-bottom: 2px solid rgba(212, 168, 67, 0.15);
    white-space: nowrap;
}

.params-table thead th:first-child {
    border-radius: var(--pro-radius-sm) 0 0 0;
}

.params-table thead th:last-child {
    border-radius: 0 var(--pro-radius-sm) 0 0;
}

.params-table tbody tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    transition: background var(--pro-transition-base);
}

.params-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.params-table tbody tr:last-child {
    border-bottom: none;
}

.params-table tbody td {
    padding: 12px 16px;
    color: var(--pro-gray-300);
    line-height: 1.5;
}

.params-table tbody td:first-child {
    font-weight: var(--pro-weight-medium);
    color: var(--pro-gray-200);
    white-space: nowrap;
}

.params-table tbody td:nth-child(2) {
    font-family: 'Roboto Mono', 'Courier New', monospace;
    font-size: 12px;
    color: var(--pro-accent-cyan);
    white-space: nowrap;
}

.param-default {
    color: var(--pro-gray-500);
    font-size: 12px;
}

.param-group-header td {
    padding: 10px 16px 6px !important;
    color: var(--pro-accent-gold) !important;
    font-weight: var(--pro-weight-semibold) !important;
    font-size: 12px !important;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: rgba(212, 168, 67, 0.04);
    border-bottom: 1px solid rgba(212, 168, 67, 0.08);
}

/* ---- 安全控制區 ---- */
.security-section {
    padding: 80px 0;
    background: var(--pro-gray-900);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.security-card {
    padding: 24px 22px;
    border-radius: var(--pro-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.02);
    text-align: center;
    transition: all var(--pro-transition-base);
}

.security-card:hover {
    border-color: rgba(212, 168, 67, 0.15);
    background: rgba(255, 255, 255, 0.04);
}

.security-card .sec-icon {
    font-size: 28px;
    margin-bottom: 12px;
    display: block;
    color: var(--pro-accent-gold);
}

.security-card h5 {
    font-size: var(--pro-text-base);
    font-weight: var(--pro-weight-semibold);
    color: var(--pro-white);
    margin-bottom: 6px;
}

.security-card p {
    font-size: 13px;
    color: var(--pro-gray-400);
    line-height: 1.6;
}

/* ---- 重要說明 ---- */
.notes-section {
    padding: 60px 0;
    background: var(--pro-gray-800);
}

.notes-container {
    max-width: 800px;
    margin: 0 auto;
}

.notes-container h4 {
    font-size: var(--pro-text-lg);
    font-weight: var(--pro-weight-semibold);
    color: var(--pro-accent-gold);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.notes-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.notes-list li {
    color: var(--pro-gray-400);
    font-size: var(--pro-text-sm);
    line-height: 1.8;
    padding: 6px 0 6px 24px;
    position: relative;
}

.notes-list li::before {
    content: '⚠';
    position: absolute;
    left: 0;
    font-size: 13px;
}

/* ---- 響應式 ---- */
@media (max-width: 1024px) {
    .solution-grid {
        grid-template-columns: 1fr;
    }

    .stat-showcase-number {
        font-size: 36px;
    }

    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portfolio-title {
        font-size: var(--pro-text-3xl);
    }

    .overview-grid {
        grid-template-columns: 1fr;
    }

    .requirements-grid {
        grid-template-columns: 1fr;
    }

    .stats-showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .spec-grid {
        grid-template-columns: 1fr;
    }

    .security-grid {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline-item {
        padding-left: 30px;
    }

    .timeline-dot {
        left: -23px;
    }

    .params-table tbody td {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    .stats-showcase-grid {
        grid-template-columns: 1fr;
    }
}