/**
 * @name: about.css
 * @description: 關於我們頁面專用樣式 — 低調精緻的量測儀器科技風
 * @version: 2.0.0
 */

/* ================================
   區域變數（科技點綴用）
   以品牌色推導，亮/暗主題自動沿用
   ================================ */
.about-hero,
.about-section {
    --tech-line: color-mix(in srgb, var(--primary-color) 22%, transparent);
    --tech-glow: color-mix(in srgb, var(--primary-color) 14%, transparent);
    --mono: ui-monospace, "SF Mono", "Roboto Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ================================
   Hero 區塊
   ================================ */
.about-hero {
    position: relative;
    padding: 7rem 0 5.5rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 55%, var(--bg-tertiary) 100%);
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.about-hero.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* 精密網格背景 */
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: 0.55;
    mask-image: radial-gradient(ellipse 82% 72% at 50% 38%, black 28%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 82% 72% at 50% 38%, black 28%, transparent 100%);
}

/* 緩慢掃描線 — 低調的儀器自檢感 */
.hero-scanline {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    mask-image: radial-gradient(ellipse 82% 72% at 50% 38%, black 28%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 82% 72% at 50% 38%, black 28%, transparent 100%);
}

.hero-scanline::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 140px;
    background: linear-gradient(to bottom, transparent, var(--tech-glow) 50%, transparent);
    opacity: 0;
    animation: heroScan 7s ease-in-out 1.2s infinite;
}

@keyframes heroScan {
    0% { transform: translateY(-160px); opacity: 0; }
    18% { opacity: 0.9; }
    82% { opacity: 0.9; }
    100% { transform: translateY(120%); opacity: 0; }
}

/* 底部量測波形 */
.hero-waveform {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 110px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1s ease 0.5s;
    mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
}

.about-hero.in-view .hero-waveform { opacity: 0.5; }

.hero-waveform svg {
    width: 100%;
    height: 100%;
    display: block;
}

.hero-waveform path {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 1.5;
    stroke-linejoin: round;
    stroke-linecap: round;
    stroke-dasharray: 2600;
    stroke-dashoffset: 2600;
    filter: drop-shadow(0 0 4px var(--tech-glow));
}

.about-hero.in-view .hero-waveform path {
    animation: waveTrace 2.8s ease-out 0.6s forwards;
}

@keyframes waveTrace {
    to { stroke-dashoffset: 0; }
}

/* Badge + LED 指示燈 */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--primary-color);
    border: 1px solid var(--tech-line);
    background: var(--tech-glow);
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    margin-bottom: 1.6rem;
}

.led-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary-color);
    box-shadow: 0 0 0 0 var(--primary-color);
    animation: ledPulse 2.4s ease-out infinite;
}

@keyframes ledPulse {
    0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--primary-color) 55%, transparent); }
    70% { box-shadow: 0 0 0 7px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
}

.hero-title {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.hero-title-main {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1;
}

.hero-title-main sup {
    font-size: 0.35em;
    vertical-align: super;
    color: var(--primary-color);
}

.hero-divider {
    display: inline-block;
    width: 2px;
    height: 2.5rem;
    background-color: var(--primary-color);
    flex-shrink: 0;
    align-self: center;
    box-shadow: 0 0 8px var(--tech-glow);
}

.hero-title-sub {
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.3;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-tertiary);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

/* 統計數字 — 數位儀表風 */
.hero-stats {
    display: flex;
    align-items: stretch;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    position: relative;
    text-align: center;
    padding-bottom: 0.65rem;
}

/* 數字底部刻度尺 */
.stat-item::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 100%;
    height: 6px;
    background-image: repeating-linear-gradient(90deg,
        var(--tech-line) 0, var(--tech-line) 1px, transparent 1px, transparent 7px);
    opacity: 0.7;
}

.stat-number {
    display: inline-block;
    font-family: var(--mono);
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

.stat-prefix {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 0.15rem;
}

.stat-suffix {
    font-family: var(--mono);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: var(--primary-color);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 0.4rem;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    align-self: center;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--border-color), transparent);
}

/* ================================
   通用 Section 樣式
   ================================ */
.about-section {
    position: relative;
    padding: 5.5rem 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.about-section.in-view {
    opacity: 1;
    transform: translateY(0);
}

.section-label {
    display: inline-flex;
    align-items: center;
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 0.85rem;
}

/* 標籤前的科技小記號 */
.section-label::before {
    content: '';
    width: 18px;
    height: 1px;
    background: var(--primary-color);
    margin-right: 0.6rem;
    box-shadow: 0 0 6px var(--tech-glow);
}

.text-center .section-label {
    justify-content: center;
}

.section-heading {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    line-height: 1.3;
}

.section-sub {
    color: var(--text-tertiary);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ================================
   公司簡介
   ================================ */
.about-intro {
    background-color: var(--bg-primary);
}

.intro-text p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.intro-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.visual-card {
    position: relative;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.85rem 1.25rem;
    text-align: center;
    overflow: hidden;
    transition: border-color 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease;
}

/* 儀器外框轉角飾線 */
.visual-card::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    width: 14px;
    height: 14px;
    border-top: 1.5px solid var(--tech-line);
    border-left: 1.5px solid var(--tech-line);
    opacity: 0;
    transition: opacity 0.35s ease;
}

/* hover 時的刻度填充條 */
.visual-card::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    height: 3px;
    width: 100%;
    background-image: repeating-linear-gradient(90deg,
        var(--primary-color) 0, var(--primary-color) 2px, transparent 2px, transparent 6px);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.visual-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.visual-card:hover::before { opacity: 1; }
.visual-card:hover::after { transform: scaleX(1); }

.visual-card i {
    font-size: 2rem;
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.75rem;
    transition: transform 0.35s ease;
}

.visual-card:hover i { transform: translateY(-2px) scale(1.06); }

.visual-card span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ================================
   經營理念
   ================================ */
.about-philosophy {
    background-color: var(--bg-secondary);
}

.philo-card {
    position: relative;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2.5rem 1.75rem 2rem;
    text-align: center;
    overflow: hidden;
    height: 100%;
    transition: border-color 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
}

.philo-card.in-view {
    opacity: 1;
    transform: translateY(0);
}

.philo-card[data-delay="1"] { transition-delay: 0.1s; }
.philo-card[data-delay="2"] { transition-delay: 0.2s; }

/* 卡片頂部編號（CSS 計數器，無需改 HTML） */
.about-philosophy .row { counter-reset: philo; }

.philo-card::before {
    counter-increment: philo;
    content: "0" counter(philo);
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    font-family: var(--mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--tech-line);
}

.philo-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.philo-icon {
    position: relative;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

/* icon 外圈脈衝 */
.philo-icon::after {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    border: 1px solid var(--tech-line);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.philo-card:hover .philo-icon::after {
    opacity: 1;
    animation: iconRing 1.8s ease-out infinite;
}

@keyframes iconRing {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.25); opacity: 0; }
}

.philo-icon i {
    font-size: 1.5rem;
    color: var(--text-inverse);
}

[data-theme="dark"] .philo-icon i {
    color: var(--bg-primary);
}

.philo-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.philo-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

.philo-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-image: repeating-linear-gradient(90deg,
        var(--primary-color) 0, var(--primary-color) 2px, transparent 2px, transparent 6px);
    opacity: 0;
    transform: scaleX(0.3);
    transform-origin: center;
    transition: opacity 0.3s ease, transform 0.4s ease;
}

.philo-card:hover .philo-accent {
    opacity: 1;
    transform: scaleX(1);
}

/* ================================
   品質保證
   ================================ */
.about-quality {
    background-color: var(--bg-primary);
}

.quality-wrapper {
    position: relative;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    overflow: hidden;
}

/* 角落網格紋理 */
.quality-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 220px;
    height: 220px;
    background-image:
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 22px 22px;
    mask-image: radial-gradient(circle at top right, black, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at top right, black, transparent 70%);
    opacity: 0.6;
    pointer-events: none;
}

.quality-standard {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 保固時間軸 */
.quality-grid {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    counter-reset: qstep;
}

/* 垂直連接軌 */
.quality-grid::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 22px;
    bottom: 22px;
    width: 2px;
    background: linear-gradient(to bottom, var(--tech-line), var(--border-color));
}

.quality-item {
    position: relative;
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.25rem;
    border-radius: 0.75rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
    opacity: 0;
    transform: translateX(20px);
}

.quality-item.in-view {
    opacity: 1;
    transform: translateX(0);
}

.quality-item:nth-child(2) { transition-delay: 0.1s; }
.quality-item:nth-child(3) { transition-delay: 0.2s; }

.quality-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateX(2px);
}

.quality-icon {
    position: relative;
    z-index: 1;
    width: 44px;
    height: 44px;
    border-radius: 0.5rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.quality-item:hover .quality-icon {
    background-color: var(--tech-glow);
    border-color: var(--primary-color);
}

.quality-icon i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.quality-item h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

/* 步驟編號標籤 */
.quality-item h4::after {
    counter-increment: qstep;
    content: "STEP " counter(qstep);
    font-family: var(--mono);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 0.1rem 0.5rem;
}

.quality-item p {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 0;
    line-height: 1.6;
}

/* ================================
   公司資訊 & 門市
   ================================ */
.about-contact {
    background-color: var(--bg-secondary);
}

.contact-card {
    position: relative;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0;
    height: 100%;
    overflow: hidden;
    transition: box-shadow 0.35s ease, transform 0.35s ease, border-color 0.35s ease;
    opacity: 0;
    transform: translateY(20px);
}

.contact-card.in-view {
    opacity: 1;
    transform: translateY(0);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.contact-card.in-view:hover {
    transform: translateY(-4px);
}

.contact-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.contact-card-header i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.contact-card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.contact-hq .contact-card-header {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    overflow: hidden;
}

/* 總公司表頭的精密網格疊紋 */
.contact-hq .contact-card-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
    background-size: 16px 16px;
    opacity: 0.5;
    pointer-events: none;
}

.contact-hq .contact-card-header i,
.contact-hq .contact-card-header h3 {
    position: relative;
    z-index: 1;
    color: var(--text-inverse);
}

[data-theme="dark"] .contact-hq .contact-card-header i,
[data-theme="dark"] .contact-hq .contact-card-header h3 {
    color: var(--bg-primary);
}

.contact-list {
    list-style: none;
    padding: 1rem 1.5rem;
    margin: 0;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
}

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

.contact-list li > i {
    font-size: 1rem;
    color: var(--primary-color);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.15rem;
}

.contact-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.contact-list a:hover {
    color: var(--primary-color);
}

.contact-list span:not(.contact-label) {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ================================
   願景
   ================================ */
.about-vision {
    background-color: var(--bg-primary);
    padding: 5.5rem 0;
}

.vision-wrapper {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
    padding: 3.5rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
}

.vision-wrapper::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 0 12px var(--tech-glow);
}

/* 願景區的放射光暈 */
.vision-wrapper::after {
    content: '';
    position: absolute;
    top: 12%;
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, var(--tech-glow), transparent 68%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 1s ease;
}

.about-vision.in-view .vision-wrapper::after {
    opacity: 1;
    animation: visionGlow 5s ease-in-out infinite;
}

@keyframes visionGlow {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 0.85; }
}

.vision-icon {
    position: relative;
    margin-bottom: 1.5rem;
}

.vision-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.vision-wrapper h2 {
    position: relative;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.vision-text {
    position: relative;
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.vision-tagline {
    position: relative;
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--primary-color);
    border: 1px solid var(--tech-line);
    background: var(--tech-glow);
    padding: 0.45rem 1.3rem;
    border-radius: 2rem;
}

/* ================================
   AI 生成點綴底圖（低調、可選）
   由 scripts/generate-about-images.js 產出；不存在時不渲染
   ================================ */

/* Hero 右側淡入的科技底圖 */
.hero-photo {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center right;
    opacity: 0.16;
    pointer-events: none;
    /* 只在右側浮現、邊緣淡出，左側文字區保持乾淨 */
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, transparent 32%, black 92%);
    mask-image: linear-gradient(90deg, transparent 0%, transparent 32%, black 92%);
}

[data-theme="dark"] .hero-photo {
    opacity: 0.26;
    mix-blend-mode: lighten;
}

/* 品質保證區角落底圖 */
.quality-photo {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center right;
    opacity: 0.1;
    pointer-events: none;
    border-radius: inherit;
    -webkit-mask-image: radial-gradient(circle at bottom right, black, transparent 62%);
    mask-image: radial-gradient(circle at bottom right, black, transparent 62%);
}

[data-theme="dark"] .quality-photo {
    opacity: 0.2;
    mix-blend-mode: lighten;
}

/* 隱藏品質區原本的純 CSS 角落網格（改用底圖時避免疊太雜） */
.quality-wrapper.has-photo::before {
    opacity: 0.25;
}

/* 願景區放射底圖 */
.vision-photo {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.12;
    pointer-events: none;
    border-radius: inherit;
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 45%, black, transparent 72%);
    mask-image: radial-gradient(ellipse 70% 70% at 50% 45%, black, transparent 72%);
}

[data-theme="dark"] .vision-photo {
    opacity: 0.24;
    mix-blend-mode: lighten;
}

/* 確保願景文字浮在底圖之上 */
.vision-wrapper.has-photo .vision-icon,
.vision-wrapper.has-photo h2,
.vision-wrapper.has-photo .vision-text,
.vision-wrapper.has-photo .vision-tagline {
    position: relative;
    z-index: 1;
}

/* ================================
   無障礙：尊重減少動態偏好
   ================================ */
@media (prefers-reduced-motion: reduce) {
    .hero-scanline::after,
    .led-dot,
    .philo-card:hover .philo-icon::after,
    .about-vision.in-view .vision-wrapper::after,
    .about-hero.in-view .hero-waveform path {
        animation: none !important;
    }
}

/* ================================
   響應式設計
   ================================ */
@media (max-width: 991px) {
    .about-hero { padding: 5rem 0 4rem; }
    .about-section { padding: 4rem 0; }
    .quality-wrapper { padding: 2rem; }
    .hero-title { gap: 0.75rem; }
}

@media (max-width: 767px) {
    .about-hero { padding: 3.5rem 0 3rem; }
    .about-section { padding: 3rem 0; }
    .hero-waveform { height: 80px; }

    .hero-title {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero-divider {
        width: 40px;
        height: 2px;
    }

    .hero-stats { gap: 1.25rem; }
    .stat-number { font-size: 2.1rem; }

    .intro-visual {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .quality-wrapper { padding: 1.5rem; }
    .quality-item h4 { flex-wrap: wrap; }

    .vision-wrapper { padding: 2.5rem 1.5rem; }
}

/* 手機：g-5 的 3rem 間距超出 container 內距，造成水平捲動 */
@media (max-width: 575.98px) {
    .about-intro .row {
        --bs-gutter-x: 1.5rem;
    }
}