* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft JhengHei', 'PingFang TC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    background-image: url('../img/about.jpg');/*這張影響品牌沿革區域背景*/
    background-position: top;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;

}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 0;
    pointer-events: none;
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(15, 15, 35, 0.2);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
    background: rgba(0, 93, 145, 0.9);
}

.nav-container {
    max-width: 1700px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    ;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
    filter: brightness(1.2);
}

.logo-icon {
    display: inline-block;
    width: 200px;
    height: 60px;
    background-image: url('../img/toplogo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    filter: brightness(1.2);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    position: relative;
    transition: all 0.3s ease;
    padding: 10px 0;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, #00d4ff, #4ade80);
    transition: width 0.3s ease;
}

.nav-menu a:hover::before {
    width: 100%;
}

.nav-menu a:hover {
    color: #00d4ff;
    transform: translateY(-2px);
}

/* 語言選擇器 */
.language-selector {
    position: relative;
    display: inline-block;
}

.language-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.language-btn::after {
    content: '▼';
    font-size: 0.6rem;
}

.language-btn.active::after {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    min-width: 130px;
    opacity: 0;
    text-align: center;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.language-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.language-dropdown a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 12px 20px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.language-dropdown a:hover {
    background: rgba(0, 212, 255, 0.1);
    color: #00d4ff;
}

.language-dropdown a.active {
    color: #00d4ff;
}

/* 漢堡選單 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    background: none;
    border: none;
    transition: all 0.3s ease;
}

.hamburger-line {
    height: 2px;
    background: white;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger-line-long {
    width: 25px;
}

.hamburger-line-short {
    width: 18px;
    margin-left: auto;
}

.hamburger.active .hamburger-line-long {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .hamburger-line-short {
    transform: rotate(-45deg);
}

/* 主視覺區域 */
.hero-section {
    position: relative;
    height: 90vh;
    background: linear-gradient(135deg, #0f203d 0%, #1a3a5f 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
    overflow: hidden;
}



.hero-section video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    padding: 0 40px;
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 30px;
    line-height: 1.2;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #b0bec5;
    margin-bottom: 50px;
    animation: fadeInUp 1.2s ease;
}

/* 彎曲分隔線 SVG */
.curve-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    overflow: hidden;
    z-index: 1;
}

.curve-divider svg {
    display: block;
    width: 100%;
    height: 101%;
}

/* 區域樣式 */
.section {
    position: relative;
    padding: 100px 40px;
    overflow: hidden;
}

.section-light {
    background: #f5f7fa;
    color: #2c3e50;
}

.section-dark {
    position: relative;
    background: transparent;
    color: #333;
}

.section-dark .section-container {
    position: relative;
    z-index: 2;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
    color: #0f203d;
}

.section-dark .section-title {
    color: white;
}

.section-subtitle {
    text-align: center;
    font-size: 1.8rem;
    color: #7cb342;
    margin-bottom: 40px;
    font-weight: 500;
}

/* 文本內容 */
.content-block {
    margin-bottom: 50px;
}

.content-block p {
    font-size: 1.1rem;
    line-height: 2;
    margin-bottom: 25px;
    text-align: justify;
}

.content-block h3 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    color: #0f203d;
    font-weight: bold;
}

.section-dark .content-block h3 {
    color: #0f203d;
}

.content-block h4 {
    font-size: 1.4rem;
    margin: 30px 0 15px;
    color: #0f203d;
}

.section-dark .content-block h4 {
    color: #b0bec5;
}

.highlight-text {
    font-size: 1.3rem;
    font-weight: bold;
    color: #0f203d;
    margin: 30px 0;
    text-align: center;
    padding: 20px;
    background: rgba(124, 179, 66, 0.1);
    border-left: 4px solid #7cb342;
}

.section-dark .highlight-text {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    border-left-color: #7cb342;
}

/* 視頻區域 */
.video-section {
    position: relative;
    padding: 80px 40px;
    background: #0f203d;
    overflow: hidden;
}

.video-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 2;
}

.video-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}


.video-item video {
    width: 100%;
    height: auto;
    display: block;
}

.video-caption {
    padding: 20px;
    color: white;
    text-align: center;
    font-size: 1.1rem;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #00d4ff, #4ade80);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 45px;
    width: 100%;
}

.timeline-content {
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    position: relative;
    margin-left: 50%;
    width: 42%;
    transform: translateX(-50%);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 55%;
    transform: translateX(-50%);
}

.timeline-year {
    font-size: 1.4rem;
    font-weight: 700;
    color: #7cb342;
    margin-bottom: 8px;
}

.timeline-text {
    font-size: 1rem;
    color: #555;
    line-height: 1.7;
}

/* 彎曲背景形狀 */
.curve-bg {
    position: absolute;
    width: 100%;
    height: 200px;
    pointer-events: none;
    z-index: 1;
}

.curve-bg-top {
    top: -100px;
    transform: rotate(180deg);
}

.curve-bg-bottom {
    bottom: -100px;
}

/* 作者簽名 */
.signature {
    text-align: right;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 2px solid rgba(124, 179, 66, 0.3);
}

.signature-name {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.signature-title {
    font-size: 1.1rem;
    color: #7cb342;
    margin-bottom: 15px;
}

.signature-quote {
    font-style: italic;
    font-size: 1.2rem;
    color: #0f203d;
}

.section-dark .signature-quote {
    color: #b0bec5;
}

/* 動畫 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}




.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 讓公司沿革項目進入視口時淡入位移回正 */

/* 響應式設計 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-container {
        padding: 0 20px;
    }

    /* 手機版導航菜單 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: url('../img/leaf.jpg') center/cover no-repeat;
        flex-direction: column;
        justify-content: center;
        text-align: center;
        align-items: center;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }



    .nav-menu a {
        color: white;
        text-decoration: none;
        font-size: 1.5rem;
        font-weight: 600;
        max-width: 300px;
        transition: all 0.3s ease;
        position: relative;
        display: block;
        padding: 15px 40px;
        border-radius: 60px;
        background: rgba(255, 255, 255, 0.05);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-menu a:hover {
        color: #535353;
        transform: translateY(-5px) scale(1.05);
        background: rgb(241, 253, 255);
    }

    .nav-menu a::before {
        display: none;
    }

    .logo-img {
        height: 40px;
    }

    .logo-icon {
        width: 130px;
        height: 40px;
    }

    .hero-section {
        height: 50vh;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    body {
        background: url('../img/about2.jpg');
    }

    .section {
        padding: 60px 20px;
    }

    .section-dark {
        background: transparent;
    }

    .video-container {
        grid-template-columns: 1fr;
    }


    .timeline-content {
        width: 88%;
        margin-left: 50%;
        transform: translateX(-55%);
    }

    .timeline-item:nth-child(even) .timeline-content {
        width: 88%;
        margin-left: 50%;
        transform: translateX(-45%);
    }
}