@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;900&family=Inter:wght@400;500;600;700&display=swap');

/* ===== CSS Variables ===== */
:root {
    --bg-dark: #080d1a;
    --bg-surface: #0f1629;
    --bg-card: #162035;
    --bg-card-hover: #1c2a45;
    --accent: #06b6d4;
    --accent-2: #3b82f6;
    --accent-green: #10b981;
    --accent-purple: #8b5cf6;
    --accent-orange: #f59e0b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.07);
    --border-accent: rgba(6, 182, 212, 0.3);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.6);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Base ===== */
* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
    position: relative;
    min-height: 100%;
}

body {
    font-family: 'Noto Sans TC', 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ===== Navbar ===== */
.navbar {
    background: rgba(8, 13, 26, 0.85) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border) !important;
    padding: 1rem 0;
    transition: var(--transition);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(8, 13, 26, 0.97) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.navbar-brand {
    font-weight: 900;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: var(--transition);
    margin: 0 2px;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--accent) !important;
    background: rgba(6, 182, 212, 0.08);
}

.navbar-toggler {
    border: 1px solid var(--border);
    padding: 0.4rem 0.6rem;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28148,163,184,0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--bg-dark);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(6, 182, 212, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 50% 50% at -10% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-content { position: relative; z-index: 1; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.25);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: fadeInDown 0.6s ease both;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-title .name {
    background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.875rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    animation: fadeInUp 0.6s ease 0.5s both;
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
    animation: fadeInRight 0.8s ease 0.3s both;
}

.hero-card-float {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-lg);
}

.service-icon-hero {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.float-badge {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    box-shadow: var(--shadow);
    white-space: nowrap;
    font-size: 0.875rem;
}

.float-badge-1 {
    top: -24px;
    right: -20px;
    animation: float 3s ease-in-out infinite;
}

.float-badge-2 {
    bottom: -10px;
    left: -30px;
    animation: float 3s ease-in-out 1.5s infinite;
}

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-surface); }

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
}

/* ===== Buttons ===== */
.btn-primary-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.3);
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.5);
    color: white;
}

.btn-outline-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    padding: 13px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-outline-custom:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(6, 182, 212, 0.06);
}

/* ===== About Section ===== */
.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.25rem;
}

.skill-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 1.5rem;
}

.skill-chip {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(6, 182, 212, 0.06);
}

.about-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}

.info-row {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.info-row:last-child { border-bottom: none; padding-bottom: 0; }
.info-row:first-child { padding-top: 0; }

.info-icon {
    width: 40px;
    height: 40px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
    font-size: 1.1rem;
}

.info-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.info-value { font-weight: 600; color: var(--text-primary); }

/* ===== Services Section ===== */
.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    height: 100%;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    opacity: 0;
    transition: var(--transition);
}

.service-card.card-cctv::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.service-card.card-network::before { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.service-card.card-web::before { background: linear-gradient(90deg, var(--accent-purple), var(--accent-2)); }

.service-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-card-hover);
}

.service-card:hover::before { opacity: 1; }

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.icon-cctv { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }
.icon-network { background: rgba(6, 182, 212, 0.12); color: var(--accent); }
.icon-web { background: rgba(139, 92, 246, 0.12); color: var(--accent-purple); }

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

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

.service-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 5px 0;
}

.service-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ===== Cases Section ===== */
.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 3rem;
}

.filter-btn {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover, .filter-btn.active {
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.case-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-card-header { padding: 2rem 2rem 1.5rem; position: relative; }

/* 實際照片卡片 */
.case-card-img-wrap {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.case-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.case-card:hover .case-card-img {
    transform: scale(1.05);
}

.case-card-img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(8,13,26,0.85) 0%, rgba(8,13,26,0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.25rem 1.5rem;
    gap: 6px;
}

.case-real-badge {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
}

/* 自有作品 badge */
.case-own-badge {
    background: rgba(245, 158, 11, 0.3);
    border-color: rgba(245, 158, 11, 0.5);
    color: #fde68a;
}

/* 自有作品卡片邊框 */
.case-card-own {
    border-color: rgba(139, 92, 246, 0.25);
}

.case-card-own:hover {
    border-color: rgba(139, 92, 246, 0.55);
    box-shadow: 0 8px 48px rgba(139, 92, 246, 0.2);
}

/* 查看網站按鈕 */
.case-visit-btn {
    display: inline-flex;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.25);
    padding: 5px 12px;
    border-radius: 8px;
    text-decoration: none;
    transition: var(--transition);
}

.case-visit-btn:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.5);
    color: var(--accent-purple);
    transform: translateY(-1px);
}

.grad-cctv-1 { background: linear-gradient(135deg, rgba(245,158,11,0.15), rgba(239,68,68,0.1)); }
.grad-cctv-2 { background: linear-gradient(135deg, rgba(239,68,68,0.15), rgba(245,158,11,0.08)); }
.grad-cctv-3 { background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(234,179,8,0.08)); }
.grad-net-1 { background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(59,130,246,0.1)); }
.grad-net-2 { background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(6,182,212,0.08)); }
.grad-web-1 { background: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(59,130,246,0.1)); }
.grad-web-2 { background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(139,92,246,0.08)); }

.case-cat-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.badge-cctv { background: rgba(245,158,11,0.15); color: #f59e0b; border: 1px solid rgba(245,158,11,0.25); }
.badge-network { background: rgba(6,182,212,0.15); color: var(--accent); border: 1px solid rgba(6,182,212,0.25); }
.badge-web { background: rgba(139,92,246,0.15); color: var(--accent-purple); border: 1px solid rgba(139,92,246,0.25); }

.case-icon {
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.08);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
}

.case-card-body { padding: 0 2rem; flex: 1; }

.case-card-body h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.case-location {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.case-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.case-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.feature-tag {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
}

.case-card-footer {
    padding: 1.25rem 2rem;
    margin-top: 1.25rem;
    border-top: 1px solid var(--border);
}

/* ===== Contact Section ===== */
.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    height: 100%;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.contact-item:last-child { border-bottom: none; }

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-icon.cyan { background: rgba(6,182,212,0.1); color: var(--accent); }
.contact-icon.green { background: rgba(16,185,129,0.1); color: var(--accent-green); }
.contact-icon.purple { background: rgba(139,92,246,0.1); color: var(--accent-purple); }
.contact-icon.orange { background: rgba(245,158,11,0.1); color: var(--accent-orange); }

.contact-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-weight: 600; color: var(--text-primary); font-size: 1rem; }

.form-control-custom {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 12px 16px;
    width: 100%;
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
    resize: none;
}

.form-control-custom::placeholder { color: var(--text-muted); }

.form-control-custom:focus {
    border-color: var(--accent);
    background: rgba(6, 182, 212, 0.04);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group { margin-bottom: 1rem; }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; display: block; }

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 3rem 0 2rem;
}

.footer-brand {
    font-weight: 900;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.footer-desc { color: var(--text-muted); font-size: 0.9rem; }

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    margin-top: 2rem;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    border: none;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.4);
}

.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(6, 182, 212, 0.6); }

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.case-col { transition: opacity 0.3s ease, transform 0.3s ease; }
.case-col.hidden { display: none; }

/* ===== Tools Section ===== */
.tool-tab-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 22px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
}

.tool-tab-btn.active,
.tool-tab-btn:hover {
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

.tool-panel { display: none; }
.tool-panel.active { display: block; }

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.tool-card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.75rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.tool-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 12px;
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.tool-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.tool-card-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.tool-form-group { margin-bottom: 1.25rem; }

.tool-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.tool-textarea,
.tool-input {
    width: 100%;
    background: var(--bg-surface);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Noto Sans TC', monospace;
    font-size: 0.875rem;
    padding: 10px 14px;
    transition: var(--transition);
    outline: none;
    resize: vertical;
}

.tool-textarea::placeholder,
.tool-input::placeholder { color: var(--text-muted); }

.tool-textarea:focus,
.tool-input:focus {
    border-color: var(--accent);
    background: rgba(6, 182, 212, 0.04);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.tool-textarea { font-family: 'Courier New', monospace; font-size: 0.82rem; }

.tool-actions {
    display: flex;
    gap: 12px;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn-tool-primary {
    display: inline-flex;
    align-items: center;
    padding: 11px 24px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
}

.btn-tool-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-tool-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-tool-secondary {
    display: inline-flex;
    align-items: center;
    padding: 11px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
}

.btn-tool-secondary:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.tool-alert {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    white-space: pre-line;
}

.tool-alert.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.tool-alert.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.tool-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    height: 100%;
}

.tool-info-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.tool-steps {
    padding-left: 1.25rem;
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.9;
}

.tool-info-divider {
    border-top: 1px solid var(--border);
    margin: 1.25rem 0;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 0.25rem;
}

.tool-tag {
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
}

.tool-notice {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 14px;
    background: rgba(139, 92, 246, 0.06);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 10px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.tool-notice i { color: var(--accent-purple); margin-top: 2px; flex-shrink: 0; }

/* ===== Tool Entry Card (Home page) ===== */
.tool-entry-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    transition: var(--transition);
    height: 100%;
}

.tool-entry-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.12);
}

.tool-entry-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 1.25rem;
}

.tool-entry-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tool-entry-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 1.25rem;
}

.tool-entry-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
}

/* ===== Tools Standalone Page ===== */
.tools-page-hero {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 100px 0 2.5rem;
}

.tools-back-link {
    display: inline-flex;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-decoration: none;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.tools-back-link:hover { color: var(--accent); }

.tools-hero-content {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.tools-hero-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    border-radius: 16px;
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.tools-hero-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 6px;
    letter-spacing: -0.5px;
}

.tools-hero-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Label row with clear button */
.tool-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.tool-clear-field {
    background: none;
    border: none;
    font-size: 0.78rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
}

.tool-clear-field:hover { color: var(--accent); }

/* ===== IIS Guide ===== */
.guide-notice {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 20px;
    background: rgba(245, 158, 11, 0.06);
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.guide-notice-icon {
    color: var(--accent-orange);
    font-size: 1.1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.guide-step {
    display: flex;
    gap: 1.5rem;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--border);
}

.guide-step:last-child { border-bottom: none; }

.guide-step-num {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 50%;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    border: 1.5px solid rgba(6, 182, 212, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 800;
    margin-top: 2px;
}

.guide-step-content { flex: 1; }

.guide-step-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.guide-step-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.75;
    margin-bottom: 0.75rem;
}

.guide-step-desc:last-child { margin-bottom: 0; }

.guide-checklist {
    list-style: none;
    padding: 0;
    margin: 0 0 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 2;
}

.guide-checklist i { color: var(--accent-green); font-weight: 700; }

.guide-path {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    background: rgba(6, 182, 212, 0.06);
    border: 1px solid var(--border-accent);
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.guide-path i { color: var(--accent); }

.guide-step-tip {
    display: inline-flex;
    align-items: flex-start;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(6, 182, 212, 0.06);
    border: 1px solid rgba(6, 182, 212, 0.15);
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
}

.guide-step-tip i { color: var(--accent); flex-shrink: 0; margin-top: 1px; }

.guide-code-block {
    margin-top: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.guide-code-title {
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--border);
    padding: 8px 14px;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 600;
}

.guide-code {
    background: #0a0f1e;
    padding: 1rem 1.25rem;
    margin: 0;
    overflow-x: auto;
}

.guide-code code {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: #7dd3fc;
    white-space: pre;
}

kbd {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 1px 6px;
    font-size: 0.82rem;
    color: var(--text-primary);
    font-family: monospace;
}

code {
    background: rgba(6, 182, 212, 0.08);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.85em;
    color: var(--accent);
    font-family: 'Courier New', monospace;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero { padding-top: 100px; }
    .hero-stats { gap: 1.5rem; }
    .hero-stat-number { font-size: 1.5rem; }
    .section { padding: 70px 0; }
    .float-badge { display: none; }
    .filter-tabs { gap: 6px; }
    .filter-btn { padding: 7px 15px; font-size: 0.85rem; }
    .hero-title { letter-spacing: -0.5px; }
}

/* ===== Postal Code Tool ===== */
.postal-search-wrap {
    position: relative;
}

.postal-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.postal-search {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 14px 10px 40px;
    border-radius: 10px;
    font-size: 0.95rem;
}

.postal-search:focus {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.postal-search::placeholder {
    color: var(--text-muted);
}

.postal-select {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.95rem;
}

.postal-select:focus {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.postal-select option {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.postal-table {
    border-collapse: separate;
    border-spacing: 0;
}

.postal-table thead th {
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1;
}

.postal-table tbody tr {
    transition: background 0.15s;
}

.postal-table tbody tr:hover {
    background: rgba(6, 182, 212, 0.05);
}

.postal-table tbody td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.92rem;
}

.postal-city-cell {
    font-weight: 600;
    color: var(--accent) !important;
}

.postal-city-repeat {
    color: transparent !important;
}

.postal-zip {
    display: inline-block;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    padding: 2px 12px;
    border-radius: 6px;
    font-weight: 600;
    font-family: 'Inter', monospace;
    font-size: 0.9rem;
}

/* ===== Blog Cards ===== */
.blog-card-link {
    text-decoration: none;
    display: block;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.blog-card:hover {
    border-color: rgba(6, 182, 212, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.blog-card-cover {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.5);
}

.blog-card-body {
    padding: 20px;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.blog-card-cat {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.blog-card-date {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.blog-card-title {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.5;
}

.blog-card-summary {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.blog-card-read {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===== Blog Article ===== */
.blog-article {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.85;
}

.blog-intro {
    font-size: 1.05rem;
    color: var(--text-primary);
    border-left: 3px solid var(--accent);
    padding-left: 20px;
    margin-bottom: 40px;
}

.blog-step {
    margin-bottom: 48px;
}

.blog-step-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.blog-step-num {
    width: 36px;
    height: 36px;
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.blog-step-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.blog-step p {
    margin-bottom: 14px;
}

.blog-step img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin: 16px 0;
}

.blog-step code {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
}

.blog-step pre {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
}

.blog-step pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.88rem;
    line-height: 1.7;
}

.blog-tip {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 16px 0;
    font-size: 0.92rem;
    color: var(--accent-green);
}

.blog-tip i {
    margin-right: 6px;
}

.blog-warn {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 16px 0;
    font-size: 0.92rem;
    color: var(--accent-orange);
}

.blog-warn i {
    margin-right: 6px;
}