/* ========================================
   可持續發展物料網站 - 樣式表
   ======================================== */

/* CSS 變數 */
:root {
    --primary-green: #15803d;
    --primary-green-dark: #166534;
    --primary-green-light: #22c55e;
    --teal: #0d9488;
    --teal-light: #14b8a6;
    --orange: #d97706;
    --orange-light: #f59e0b;
    --yellow: #eab308;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --pink: #ec4899;
    
    --text-dark: #1f2937;
    --text-medium: #4b5563;
    --text-light: #6b7280;
    --text-white: #ffffff;
    
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-green-light: #f0fdf4;
    --bg-teal-light: #f0fdfa;
    --bg-orange-light: #fffbeb;
    
    --border-light: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --header-height: 80px;
    --tw-gradient-from-position : ;
    --tw-gradient-to-position : ;
    --tw-gradient-via-position : ;
    --tw-gradient-from: rgb(20 83 45 / .5) var(--tw-gradient-from-position);
    --tw-gradient-to: rgb(20 83 45 / .5) var(--tw-gradient-to-position);

    --tw-gradient-stops: var(--tw-gradient-from), rgb(20 83 45 / .4) var(--tw-gradient-via-position), var(--tw-gradient-to);

}

.nav-menu-close-item{
    display: none;
}

/* ========================================
   品牌宣言橫幅（公告欄 - 不滾動）
   ======================================== */
.brand-banner {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 50%, #0f5132 100%);
    color: var(--text-white);
    padding: 0.75rem 1rem;
    position: fixed;
    top: var(--header-height, 80px);
    left: 0;
    right: 0;
    overflow: hidden;
}

.brand-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.brand-banner-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.brand-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.brand-icon i {
    font-size: 1.75rem;
    color: var(--orange-light);
}

.brand-text {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.brand-slogan {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.brand-divider {
    font-size: 1.25rem;
    color: var(--orange-light);
    font-weight: 300;
}

.brand-subtext {
    font-size: 1rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    font-style: italic;
}

/* ========================================
   語言選擇器（新樣式）
   ======================================== */
.lang-selector {
    position: relative;
    margin-left: 1rem;
    flex-shrink: 0;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-lg);
    color: var(--text-white);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.35);
}

.lang-btn i:first-child {
    font-size: 1.125rem;
}

.lang-arrow {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.lang-btn.active .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 160px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1002;
    overflow: hidden;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-dark);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.lang-option:hover {
    background: var(--bg-green-light);
}

.lang-option.active {
    background: var(--bg-green-light);
    color: var(--primary-green);
}

.lang-option .lang-flag {
    font-size: 1.25rem;
}

.lang-option .lang-name {
    font-weight: 500;
}

/* 滾動後的導航欄樣式 */
.navbar.scrolled .lang-btn {
    background: var(--bg-white);
    border-color: var(--border-light);
    color: var(--text-dark);
    box-shadow: var(--shadow-sm);
}

.navbar.scrolled .lang-btn:hover {
    background: var(--bg-green-light);
}

/* ========================================
   品牌宣言 Section
   ======================================== */
.brand-section {
    position: relative;
}

.brand-manifesto {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.manifesto-item {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.manifesto-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.manifesto-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.manifesto-icon i {
    font-size: 2rem;
    color: var(--text-white);
}

.manifesto-text h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.manifesto-text p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    font-weight: 500;
}

.manifesto-conclusion {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--bg-green-light), var(--bg-teal-light));
    border-radius: var(--radius-xl);
    border: 2px solid rgba(21, 128, 61, 0.15);
}

.manifesto-conclusion p {
    font-style: italic;
}

/* ========================================
   關於我們 Section - 全新設計
   ======================================== */
.about-us {
    position: relative;
    padding: 6rem 1.5rem;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-green-light) 50%, var(--bg-white) 100%);
    overflow: hidden;
}

/* 裝飾背景 */
.about-us-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.about-bg-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.08;
}

.about-bg-circle-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-green) 0%, transparent 70%);
    top: -100px;
    right: -80px;
}

.about-bg-circle-2 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, var(--teal) 0%, transparent 70%);
    bottom: -50px;
    left: -50px;
}

/* 响应式 - 装饰圆圈 */
@media (max-width: 768px) {
    .about-bg-circle-1 {
        width: 200px;
        height: 200px;
        top: -50px;
        right: -40px;
    }

    .about-bg-circle-2 {
        width: 150px;
        height: 150px;
        bottom: -30px;
        left: -30px;
    }
}

@media (max-width: 480px) {
    .about-bg-circle-1 {
        width: 120px;
        height: 120px;
        opacity: 0.5;
    }

    .about-bg-circle-2 {
        width: 80px;
        height: 80px;
        opacity: 0.5;
    }
}

/* 標題區 */
.about-hero {
    text-align: center;
    margin-bottom: 3rem;
}

.about-hero-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: 0 12px 30px -7px rgba(21, 128, 61, 0.4);
}

.about-hero-icon i {
    font-size: 2.5rem;
    color: var(--text-white);
}

.about-hero h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.about-hero-line {
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-green), var(--teal));
    margin: 0 auto;
    border-radius: 2px;
}

/* ========== 集中在一個大卡片裡 ========== */
.about-content {
    background: var(--bg-white);
    border-radius: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* 頂部引言區 */
.about-intro-area {
    background: linear-gradient(135deg, var(--bg-teal-light) 0%, var(--bg-green-light) 100%);
    padding: 2.5rem 3rem;
    border-bottom: 1px solid rgba(21, 128, 61, 0.08);
}

.about-intro-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.about-intro-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.about-intro-icon i {
    font-size: 1.375rem;
    color: var(--text-white);
}

.about-intro-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
}

.about-intro-quote {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.about-intro-quote .quote-icon {
    position: absolute;
    left: 0;
    top: -0.25rem;
    font-size: 1.75rem;
    color: var(--primary-green);
    opacity: 0.15;
}

.about-intro-quote p {
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.8;
}

.about-philosophy-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--teal);
    color: var(--text-white);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.875rem;
}

.about-philosophy-label i {
    font-size: 1rem;
}

.about-philosophy-content p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.8;
}

/* 三大原則區 */
.about-principles-area {
    padding: 2.5rem 3rem;
}

.about-principles-intro {
    text-align: center;
    margin-bottom: 2rem;
}

.about-principles-intro p {
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.7;
}

.about-principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.principle-card {
    position: relative;
    border-radius: 1.25rem;
    padding: 0.2rem;
    transition: transform 0.35s ease;
}

.principle-card:hover {
    transform: translateY(-6px);
}

.principle-card-glow {
    position: absolute;
    inset: 0;
    border-radius: 1.25rem;
    opacity: 0;
    transition: opacity 0.35s ease;
}

.principle-card:hover .principle-card-glow {
    opacity: 1;
}

.principle-reuse .principle-card-glow {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-light));
    filter: blur(20px);
}

.principle-recycle .principle-card-glow {
    background: linear-gradient(135deg, var(--teal), var(--teal-light));
    filter: blur(20px);
}

.principle-degrade .principle-card-glow {
    background: linear-gradient(135deg, var(--orange), var(--orange-light));
    filter: blur(20px);
}

.principle-card-inner {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 1.5rem 1.25rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
    border: 1px solid var(--border-light);
}

.principle-number {
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    font-size: 2rem;
    font-weight: 900;
    opacity: 0.06;
    color: var(--text-dark);
}

.principle-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.875rem;
    box-shadow: 0 6px 20px -3px rgba(0, 0, 0, 0.12);
    transition: transform 0.35s ease;
}

.principle-card:hover .principle-icon {
    transform: scale(1.08);
}

.principle-reuse .principle-icon {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
}

.principle-recycle .principle-icon {
    background: linear-gradient(135deg, var(--teal), #0d9488);
}

.principle-degrade .principle-icon {
    background: linear-gradient(135deg, var(--orange), #b45309);
}

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

.principle-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.principle-card p {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.65;
}

/* 底部宣言區 */
.about-manifesto-area {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 2.5rem 3rem;
    text-align: center;
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.about-manifesto-area::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    border: 2px solid rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.about-manifesto-area::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -30px;
    width: 250px;
    height: 250px;
    border: 2px solid rgba(21, 128, 61, 0.15);
    border-radius: 50%;
}

.manifesto-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
}

.manifesto-statements {
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
}

.manifesto-statement {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
    background: linear-gradient(90deg, #fff, #a7f3d0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.manifesto-statement:last-child {
    margin-bottom: 0;
}

.manifesto-conclusion {
    font-size: 1.125rem;
    color: #6ee7b7;
    font-weight: 500;
    font-style: italic;
    position: relative;
    z-index: 1;
}

/* 願景區 */
.about-vision-area {
    padding: 2rem 3rem;
    background: linear-gradient(135deg, rgba(21, 128, 61, 0.04) 0%, rgba(13, 148, 136, 0.04) 100%);
    border-top: 1px solid rgba(21, 128, 61, 0.08);
    text-align: center;
}

.vision-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-green), var(--teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.vision-icon i {
    font-size: 1.25rem;
    color: var(--text-white);
}

.about-vision-area p {
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

/* ========== 入場動畫 ========== */
.about-hero,
.about-content {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.about-hero.animate,
.about-content.animate {
    opacity: 1;
    transform: translateY(0);
}

.about-content { transition-delay: 0.15s; }

/* ========== 響應式 ========== */
@media (max-width: 992px) {
    .about-principles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .principle-card:last-child {
        grid-column: span 2;
        max-width: 50%;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .about-us {
        padding: 4rem 1rem;
    }

    .about-hero h2 {
        font-size: 1.875rem;
    }

    .about-hero-icon {
        width: 70px;
        height: 70px;
    }

    .about-hero-icon i {
        font-size: 2rem;
    }

    .about-intro-area,
    .about-principles-area,
    .about-manifesto-area,
    .about-vision-area {
        padding: 2rem 1.5rem;
    }

    .manifesto-statement {
        font-size: 1.25rem;
    }
}

/* ========================================
   響應式調整
   ======================================== */
@media (max-width: 768px) {
    .brand-banner {
        padding: 0.5rem 0.75rem;
    }

    .brand-banner-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
    }

    .brand-icon {
        width: 32px;
        height: 32px;
        margin-bottom: 0;
    }

    .brand-icon i {
        font-size: 1.125rem;
    }

    .brand-text {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.375rem;
    }

    .brand-slogan {
        font-size: 0.8125rem;
    }

    .brand-divider {
        font-size: 0.75rem;
    }

    .brand-subtext {
        font-size: 0.75rem;
    }

    .brand-manifesto {
        flex-direction: column;
        align-items: center;
    }

    .manifesto-item {
        max-width: 100%;
        width: 100%;
    }

    /* 關於我們 - 平板與手機 */
    .about-us {
        padding: 4rem 1rem;
    }

    .about-hero-icon {
        width: 80px;
        height: 80px;
    }

    .about-hero-icon i {
        font-size: 2.5rem;
    }

    .about-hero h2 {
        font-size: 2rem;
    }

    .about-intro-card {
        padding: 1.75rem;
    }

    .about-intro-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .about-intro-icon {
        width: 48px;
        height: 48px;
    }

    .about-intro-icon i {
        font-size: 1.5rem;
    }

    .about-intro-header h3 {
        font-size: 1.5rem;
    }

    .about-intro-quote {
        padding-left: 1.5rem;
    }

    .about-intro-quote .quote-icon {
        font-size: 2rem;
        left: 0;
    }

    .about-intro-quote p {
        font-size: 1rem;
    }

    .about-philosophy-section {
        padding: 1.75rem;
    }

    .philosophy-label {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }

    .philosophy-content p {
        font-size: 1rem;
    }

    .about-principles-intro p {
        font-size: 1rem;
    }

    .about-principles-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .principle-card-inner {
        padding: 1.75rem;
    }

    .principle-card {
        width: 100% !important;
        max-width: 100% !important;
    }

    .principle-icon {
        width: 70px;
        height: 70px;
    }

    .principle-icon i {
        font-size: 2rem;
    }

    .principle-number {
        font-size: 2.5rem;
    }

    .about-manifesto {
        padding: 3rem 1.5rem;
    }

    .manifesto-statement {
        font-size: 1.5rem;
    }

    .manifesto-conclusion {
        font-size: 1.125rem;
    }

    .about-vision {
        padding: 2rem 1.5rem;
    }

    .about-vision p {
        font-size: 1rem;
    }

    .vision-icon {
        width: 50px;
        height: 50px;
    }

    .vision-icon i {
        font-size: 1.5rem;
    }
}

/* cyrillic-ext */
@font-face {
    font-family: 'Pacifico';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/pacifico/v23/FwZY7-Qmy14u9lezJ-6K6MmTpA.woff2) format('woff2');
    unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
    font-family: 'Pacifico';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/pacifico/v23/FwZY7-Qmy14u9lezJ-6D6MmTpA.woff2) format('woff2');
    unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* vietnamese */
@font-face {
    font-family: 'Pacifico';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/pacifico/v23/FwZY7-Qmy14u9lezJ-6I6MmTpA.woff2) format('woff2');
    unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
    font-family: 'Pacifico';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/pacifico/v23/FwZY7-Qmy14u9lezJ-6J6MmTpA.woff2) format('woff2');
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
    font-family: 'Pacifico';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url(https://fonts.gstatic.com/s/pacifico/v23/FwZY7-Qmy14u9lezJ-6H6Mk.woff2) format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* 重置樣式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 區塊 */
.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-medium);
    line-height: 1.8;
}

/* ========================================
   導航欄
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
    background-color: #14532d33;
    backdrop-filter: blur(10px);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgb(255 255 255 );
}


.nav-container {
    display: flex;
    align-items: center;
    justify-content: center;

    margin: 0 auto;
    padding:  1rem;
    gap: 0.5rem;
    position: relative;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    background-color: #fffffff2;
    border-radius: 0.5rem;
    flex-shrink: 0;
}

.logo img {
    width: 6.2rem;
    height: auto;
    border-radius: 5px;
    object-fit: contain;
    flex-shrink: 0;
}

.logo-slogan {
    display: none;
    font-size: 14px;
    color: #fff;
    line-height: 1.4;
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-align: center;

}
.logo-slogan-box{
    width: 40rem;
    overflow: hidden;
    margin: auto;
}

.scrolled .logo-slogan{
    border-top: 1px solid #15803d;
}

.logo-slogan-inner {
    display: inline-block;
    animation: marquee 20s linear infinite;
}

.navbar.scrolled .logo-slogan {
    color: var(--text-medium);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@media (min-width: 1024px) {
    .nav-container {
        flex-wrap: wrap;
        justify-content: center;
        height: auto;
        min-height: 80px;
        padding-bottom: 0;
    }
    .logo-wrapper {
        flex-direction: row;
        align-items: center;
        gap: 1rem;
    }
    .logo-slogan {
        display: block;
        width: 100%;
        order: 10;
        max-width: none;
        text-align: center;
        padding: 0.5rem 0;
        border-top: 1px solid rgba(255,255,255,0.2);
        margin-top: 0.5rem;
        margin-left: auto;
        margin-right: auto;
    }
    .nav-menu {
        order: 2;
    }
    .lang-selector {
        order: 3;
    }
    .nav-toggle {
        order: 4;
    }
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    padding: 0.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 1;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    margin-left: 1.5rem;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-link {
    display: block;
    padding: 0.375rem 0.625rem;
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    /*color: var(--text-medium);*/
    color: #fff;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-green);
    background: var(--bg-green-light);
}
.navbar.scrolled .nav-link{
    color: rgb(55 65 81 );
}
/* ========================================
   Hero 區域
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('../img/1054ca0dd2c974c927b74e4adf230cf3.jpg') center/cover no-repeat;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(to bottom, var(--tw-gradient-stops));
    /*background: linear-gradient(to bottom, rgba(21, 128, 61, 0.7), rgba(21, 128, 61, 0.5));*/
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
    color: var(--text-white);
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按鈕 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--orange);
    color: var(--text-white);
}

.btn-primary:hover {
    background: var(--orange-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 2px solid #fbbf2480;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-white);
}

/* ========================================
   關於可持續發展
   ======================================== */
.about {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.about-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.about-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.75rem;
    color: var(--text-white);
}

.about-icon.green {
    background: var(--primary-green);
}

.about-icon.teal {
    background: var(--teal);
}

.about-icon.orange {
    background: var(--orange);
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.about-card p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.7;
}

/* ========================================
   實踐與挑戰
   ======================================== */
.practice {
    background: var(--bg-light);
}

.practice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.practice-column {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.practice-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-light);
}

.practice-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.practice-item:last-child {
    margin-bottom: 0;
}

.practice-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
    flex-shrink: 0;
}

.practice-icon.yellow {
    background: var(--yellow);
}

.practice-icon.orange {
    background: var(--orange);
}

.practice-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.practice-content p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.6;
}

/* ========================================
   User-Friendly 對比
   ======================================== */
.user-friendly {
    background: var(--bg-white);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.comparison-card {
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.comparison-card.friendly {
    background: var(--bg-green-light);
    border: 1px solid rgba(21, 128, 61, 0.2);
}

.comparison-card.unfriendly {
    background: var(--bg-orange-light);
    border: 1px solid rgba(217, 119, 6, 0.2);
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.comparison-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
}

.comparison-card.friendly .comparison-icon {
    background: var(--primary-green);
}

.comparison-card.unfriendly .comparison-icon {
    background: var(--orange);
}

.comparison-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.comparison-card.friendly h3 {
    color: var(--primary-green);
}

.comparison-card.unfriendly h3 {
    color: var(--orange);
}

.comparison-list li {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.comparison-list li:last-child {
    margin-bottom: 0;
}

.comparison-list i {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.comparison-card.friendly .comparison-list i {
    background: var(--primary-green);
    color: var(--text-white);
}

.comparison-card.unfriendly .comparison-list i {
    background: var(--orange);
    color: var(--text-white);
}

.comparison-list strong {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.comparison-list p {
    font-size: 0.875rem;
    color: var(--text-medium);
    line-height: 1.6;
}

.commitment {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    text-align: center;
    color: var(--text-white);
}

.commitment h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.commitment p {
    font-size: 1rem;
    line-height: 1.8;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* ========================================
   產品認證
   ======================================== */
.product-cert {
    background: var(--bg-light);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.cert-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.cert-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2.5rem;
    color: var(--text-white);
}

.cert-icon.green {
    background: var(--primary-green);
}

.cert-icon.orange {
    background: var(--orange);
}

.cert-icon.teal {
    background: var(--teal);
}

.cert-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.cert-desc {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.cert-features {
    text-align: left;
}

.cert-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
}

.cert-features i {
    color: var(--primary-green);
    font-size: 1rem;
}

/* ========================================
   工廠認證
   ======================================== */
.factory-cert {
    background: var(--bg-white);
}

.factory-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.factory-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-base);
}

.factory-card:hover {
    border-color: var(--primary-green);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.factory-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.75rem;
    color: var(--text-white);
}

.factory-icon.green { background: var(--primary-green); }
.factory-icon.teal { background: var(--teal); }
.factory-icon.blue { background: var(--blue); }
.factory-icon.purple { background: var(--purple); }
.factory-icon.orange { background: var(--orange); }
.factory-icon.pink { background: var(--pink); }

.factory-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.factory-card > p {
    font-size: 0.875rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.factory-card ul {
    text-align: left;
}

.factory-card li {
    font-size: 0.8125rem;
    color: var(--text-light);
    padding: 0.25rem 0;
    border-bottom: 1px dashed var(--border-light);
}

.factory-card li:last-child {
    border-bottom: none;
}

.cert-summary {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    text-align: center;
    color: var(--text-white);
    margin-top: 3rem;
}

.cert-summary h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.cert-summary p {
    font-size: 1rem;
    line-height: 1.8;
    opacity: 0.95;
    max-width: 900px;
    margin: 0 auto;
}

/* ========================================
   產品系列
   ======================================== */
.products {
    background: var(--bg-light);
}

.product-category {
    margin-bottom: 4rem;
}

.product-category:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--text-white);
}

.category-icon.green { background: var(--primary-green); }
.category-icon.orange { background: var(--orange); }
.category-icon.teal { background: var(--teal); }

.category-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.category-info p {
    font-size: 0.9375rem;
    color: var(--text-medium);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-content {
    padding: 1.5rem;
}

.product-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.product-content p {
    font-size: 0.875rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.product-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.product-badge {
    background: var(--bg-green-light);
    color: var(--primary-green);
}

.product-badge.orange {
    background: var(--bg-orange-light);
    color: var(--orange);
}

.product-badge.teal {
    background: var(--bg-teal-light);
    color: var(--teal);
}

.btn-learn-more {
    display: block;
    width: 100%;
    padding: 0.625rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-white);
    background: var(--primary-green);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-learn-more:hover {
    background: var(--primary-green-dark);
}

/* ========================================
   聯絡我們
   ======================================== */
.contact {
    background: linear-gradient(135deg, var(--bg-green-light), var(--bg-teal-light));
}

.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row .form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.required {
    color: #ef4444;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    color: var(--text-dark);
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(21, 128, 61, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.char-count {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.btn-submit {
    display: block;
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    background: var(--primary-green);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn-submit:hover {
    background: var(--primary-green-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   頁腳
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    color: var(--text-white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 3fr;
    gap:2rem;
    margin-bottom: 3rem;
}

.footer-ca{
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
}

.footer-ca-box{
    width: 100%;
}



.footer-brand img {
    width: 6rem;
    height: 6rem;
    background: #fff;
    padding:0.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    opacity: 0.9;
}

.footer-address h4,
.footer-contact h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-address {
    padding-right: 1rem;
}

.footer-address-content {
    margin-bottom: 1rem;
}

.footer-address-zh {
    font-size: 0.9375rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.footer-address-en {
    font-size: 0.8125rem;
    line-height: 1.5;
    opacity: 0.7;
}

.footer-address-details {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-address-details li {
    font-size: 0.9375rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.footer-contact li ,.footer-contact p{
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    opacity: 0.9;
    margin-bottom: 0.75rem;
}

.footer-contact i {
    font-size: 1.125rem;
}

.footer-qrcode {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-qrcode img {
    width: 9rem;
    height: 9rem;
    border-radius: var(--radius-md);
    background: #fff;
    padding: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ========================================
   返回頂部按鈕
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--primary-green);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-green-dark);
    transform: translateY(-3px);
}

/* ========================================
   響應式設計
   ======================================== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    /* 關於我們 - 平板 */
    .about-principles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .principle-card:last-child {
        grid-column: span 2;
        max-width: 50%;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .navbar + section,
    .navbar + .hero {
        padding-top: 60px;
    }

    .navbar {
        /*height: 60px;*/
    }

    /* 修復 about-principles-grid 手機端顯示為單列 */
    .about-principles-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .principle-card:last-child {
        grid-column: unset;
        max-width: 100%;
    }

    .nav-container {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        padding: 0.5rem 1rem;
        gap: 0.5rem;
    }

    .logo-wrapper {
        flex: 0 0 auto;
    }

    .logo-slogan {
        display: block;
        width: 100%;
        flex: 0 0 100%;
        text-align: center;
        padding: 0.5rem 0;
        font-size: 0.65rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: none;
        background: rgba(21, 128, 61, 0.1);
        border-top: 1px solid rgba(255,255,255,0.2);
        margin-top: 0.25rem;
    }

    .logo-slogan-box {
        width: 100%;
        max-width: none;
        overflow: hidden;
    }

    .nav-toggle {
        flex: 0 0 auto;
    }

    .lang-selector {
        flex: 0 0 auto;
    }

    .nav-menu {
        flex: 0 0 auto;
        width: 100%;
    }

    .section {
        padding: 3rem 0;
    }

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

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height, 80px);
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: 1;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu.active .nav-menu-close-item {
        display: block;
    }

    .nav-menu-close {
        display: none;
        position: absolute;
        top: 0.5rem;
        right: 2rem;
        width: 2rem;
        height: 2rem;
        border: none;
        background: var(--bg-green-light);
        border-radius: 50%;
        cursor: pointer;
        z-index: 10;
        align-items: center;
        justify-content: center;
    }

    .nav-menu.active .nav-menu-close {
        display: block;
    }

    .nav-menu-close i {
        font-size: 1.25rem;
        color: var(--primary-green);
    }

    .nav-link {
        width: 100%;
        padding: 0.75rem 1rem;
        color: #4b5563;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .practice-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-grid {
        grid-template-columns: 1fr;
    }
    
    .factory-grid {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .logo-slogan-box {
        width: 100%;
        max-width: 100vw;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease forwards;
}

/* 滾動顯示動畫 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}