/* * =============================================
 * CSS 變數 (Variables)
 * =============================================
 */
:root {
    /* 品牌色 (主色:電光藍 / 輔色:薄荷綠) */
    --primary-color: #5E60FF;
    /* 非常鮮明的電光藍 */
    --primary-dark: #4345DD;
    /* 主色加深 */
    --secondary-color: #00C49A;
    /* 清新的薄荷綠 */

    /* 新增:漸層變數 */
    --gradient-start: var(--primary-color);
    --gradient-end: var(--secondary-color);
    --gradient-bg: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));

    /* 狀態色 */
    --green-color: #48bb78;
    --green-dark: #5e60ff;
    --red-color: #e53e3e;
    --yellow-color: #fbbf24;

    /* 中性色 (沿用您的原始設定,它們很搭) */
    --text-dark: #2d3748;
    --text-light: #718096;
    --text-white: #ffffff;

    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;

    /* 樣式 (沿用您的設定) */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", Arial, sans-serif;
    --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.1);
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* * =============================================
 * Global & Reset
 * =============================================
 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--bg-light);
    -webkit-font-smoothing: antialiased;
}

/* * =============================================
 * Typography & Utilities
 * =============================================
 */
h1,
h2,
h3,
h4,
h5,
h6 {
    margin-bottom: 1rem;
    line-height: 1.3;
    font-weight: 700;
}

/* Utility for inline icons */
.bi {
    margin-right: 0.5em;
    vertical-align: -0.125em;
    /* Align icons better with text */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 60px;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn .bi {
    margin-right: 0.4em;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-green {
    background: var(--green-color);
    color: var(--text-white);
    box-shadow: 0 5px 20px rgba(72, 187, 120, 0.3);
}

.btn-green:hover {
    background: var(--green-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(72, 187, 120, 0.4);
}

.badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge .bi {
    margin-right: 0.3em;
}

/* * =============================================
 * Navigation Bar
 * =============================================
 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo {
    height: 40px;
    width: auto;
    vertical-align: middle;
    margin-right: 5px;
    padding-bottom: 3px;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 900;
    font-size: 1rem;
    transition: all 0.3s ease;
    padding: 8px 0;
    position: relative;
}

.nav-menu a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a:hover:after,
.nav-menu a.active:after {
    width: 100%;
}

.nav-menu a.active {
    color: var(--primary-color);
}

.nav-language {
    display: flex;
    align-items: center;
}

.language-selector {
    padding: 6px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

.language-selector:hover {
    border-color: var(--primary-color);
}

.language-selector:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(94, 96, 255, 0.1);
}

/* * =============================================
 * Header / Hero
 * =============================================
 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
    padding: 150px 20px 120px;
    text-align: center;
    margin-top: 60px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.hero h1 .bi {
    font-size: 0.9em;
}

.hero p {
    font-size: 1.35rem;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* * =============================================
 * Section: Anchor (Competitors)
 * =============================================
 */
.anchor-section {
    background: var(--bg-white);
    padding: 60px 40px;
    margin-top: -80px;
    /* Pull up over the hero */
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 10;
}

.global-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.global-card {
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

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

.global-card .provider {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.global-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--red-color);
    margin: 20px 0;
}

.global-card .price-note {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: -15px;
}

.global-card .features {
    text-align: left;
    margin-top: 25px;
    font-size: 0.95rem;
    color: var(--text-light);
    padding-left: 0;
}

.global-card .features li {
    margin: 10px 0;
    list-style: none;
    padding-left: 20px;
    position: relative;
}

.global-card .features li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #cbd5e0;
    font-weight: bold;
}

/* * =============================================
 * Section: Our Solution (Value Prop)
 * =============================================
 */
.our-solution {
    background: linear-gradient(135deg, var(--green-color) 0%, var(--green-dark) 100%);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    color: var(--text-white);
    text-align: center;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(72, 187, 120, 0.3);
}

.our-solution .badge {
    position: absolute;
    top: 25px;
    right: 25px;
    background: var(--yellow-color);
    color: var(--text-dark);
}

.our-solution h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.price-comparison {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.old-price {
    font-size: 2.25rem;
    text-decoration: line-through;
    opacity: 0.7;
}

.arrow {
    font-size: 3rem;
    font-weight: 300;
}

.new-price {
    font-size: 4.5rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.savings {
    background: rgba(255, 255, 255, 0.2);
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 1.3rem;
    margin-top: 20px;
    display: inline-block;
}

/* * =============================================
 * Section: Success Cases
 * =============================================
 */
.success-cases {
    background: var(--bg-white);
}

.success-cases .section-subtitle {
    margin-bottom: 60px;
}

.success-cases .our-solution p {
    margin-top: 30px;
    font-size: 1.2rem;
}

.success-cases .case-examples h3 {
    margin-top: 80px;
}

.success-cases .live-demo-section h3 {
    margin-top: 60px;
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto 60px;
}

.stat-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.15);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

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

.case-examples {
    max-width: 1000px;
    margin: 0 auto 50px;
}

.case-examples h3 {
    text-align: center;
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 40px;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.example-item {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.example-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
}

.example-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.example-icon .bi {
    margin-right: 0;
}

.example-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.example-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

.customer-groups {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    max-width: 900px;
    margin: 60px auto 0;
}

.groups-note {
    font-size: 1rem;
    color: var(--text-dark);
    line-height: 1.8;
}

.groups-note strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* * =============================================
 * Section: Live Demos
 * =============================================
 */
.live-demo-section {
    padding-top: 60px;
    max-width: 1100px;
    margin: 0 auto;
}

.demo-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.demo-card {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.demo-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.demo-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: left;
}

.demo-card:hover:before {
    transform: scaleX(1);
}

.demo-tag {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    color: var(--primary-color);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: inline-block;
}

.demo-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
    min-height: 2.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-button {
    display: block;
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.demo-button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.4);
}

.demo-note {
    background: linear-gradient(135deg, rgba(72, 187, 120, 0.05) 0%, rgba(56, 161, 105, 0.05) 100%);
    border-left: 4px solid var(--green-color);
    border-radius: 10px;
    padding: 25px 30px;
    text-align: center;
}

.demo-note p {
    margin: 8px 0;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.demo-note strong {
    color: var(--green-color);
}

/* * =============================================
 * Section: How It Works
 * =============================================
 */
.how-it-works {
    background: var(--bg-white);
}

.how-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.how-card {
    text-align: center;
    padding: 30px;
}

.how-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.how-icon .bi {
    margin-right: 0;
}

.how-step {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.how-card h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.how-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* * =============================================
 * Section: Plans
 * =============================================
 */
.plans-section {
    background: var(--bg-light);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.plan-card {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.plan-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.plan-card.featured {
    border-color: var(--green-color);
    background: linear-gradient(to bottom, #f0fff4 0%, white 100%);
}

.plan-card .badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--green-color);
    color: var(--text-white);
}

.plan-card.featured .badge {
    background: var(--green-color);
    color: var(--text-white);
}

.plan-card:not(.featured) .badge {
    background: var(--primary-color);
    color: var(--text-white);
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.plan-type {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

.plan-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 20px 0;
}

.plan-card.featured .plan-price {
    color: var(--green-color);
}

.plan-unit {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-light);
}

.plan-features {
    list-style: none;
    margin-top: 30px;
}

.plan-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    font-size: 0.95rem;
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-features li:before {
    content: "✓";
    color: var(--green-color);
    font-weight: bold;
    margin-right: 12px;
    flex-shrink: 0;
}

.plan-card .cta-button {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

/* * =============================================
 * Section: Why Us
 * =============================================
 */
.why-us {
    background: var(--bg-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.benefit {
    text-align: center;
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--green-color);
}

.benefit-icon .bi {
    margin-right: 0;
}

.benefit h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.benefit p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* * =============================================
 * Section: Final CTA
 * =============================================
 */
.final-cta {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
}

.final-cta .container {
    max-width: 1200px;
    margin: auto;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

/* 左側內容 */
.contact-left {
    text-align: left;
}

.contact-left h2 {
    font-size: 2.5rem;
    color: var(--text-white);
    margin-bottom: 20px;
}

.contact-left > p {
    font-size: 1.2rem;
    color: var(--text-white);
    margin-bottom: 40px;
    opacity: 0.95;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-top: 3px;
}

.contact-item strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-white);
}

.contact-item p {
    margin: 0;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

/* 右側表單 */
.contact-right {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.contact-form h3 {
    color: var(--text-dark);
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all 0.3s ease;
    background: var(--bg-white);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(94, 96, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(94, 96, 255, 0.3);
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(94, 96, 255, 0.4);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-submit i {
    margin-right: 8px;
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(72, 187, 120, 0.1);
    color: var(--green-color);
    border: 2px solid var(--green-color);
}

.form-message.error {
    display: block;
    background: rgba(229, 62, 62, 0.1);
    color: var(--red-color);
    border: 2px solid var(--red-color);
}

/* * =============================================
 * Footer
 * =============================================
 */
footer {
    background: var(--text-dark);
    color: #a0aec0;
    padding: 60px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p {
    margin: 10px 0;
    line-height: 1.8;
}

.footer-tagline {
    color: #718096;
    font-size: 0.95rem;
    font-style: italic;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #a0aec0;
}

.footer-contact i {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

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

.footer-links li {
    margin: 12px 0;
}

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    color: #ffffff;
    font-size: 0.9rem;
}

/* * =============================================
 * Back to Top Button
 * =============================================
 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 999;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.back-to-top i {
    margin: 0;
}

/* * =============================================
 * Responsive Design
 * =============================================
 */
@media (max-width: 992px) {

    .plans-grid,
    .demo-grid,
    .examples-grid,
    .benefits-grid,
    .how-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    /* 聯絡區塊響應式 */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-left {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
        gap: 0;
    }

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

    .nav-menu li {
        margin: 0;
    }

    .nav-menu a {
        display: block;
        padding: 15px;
        font-size: 1rem;
    }

    .nav-language {
        padding: 15px;
        justify-content: center;
    }

    .language-selector {
        width: 200px;
    }

    .hero {
        padding: 120px 20px 100px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .anchor-section {
        padding: 40px 20px;
        margin-top: -60px;
    }

    .section-title,
    .our-solution h2 {
        font-size: 1.8rem;
    }

    .section-subtitle {
        margin-bottom: 40px;
    }

    .new-price {
        font-size: 3.5rem;
    }

    .global-comparison {
        grid-template-columns: 1fr;
    }

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

    .back-to-top {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.2rem;
    }

    .nav-menu {
        gap: 10px;
    }

    .nav-menu a {
        font-size: 0.75rem;
        padding: 5px 0;
    }

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

    .price-comparison {
        gap: 15px;
    }

    .old-price {
        font-size: 1.8rem;
    }

    .new-price {
        font-size: 3rem;
    }

    .final-cta h2 {
        font-size: 2rem;
    }

    .final-cta-button {
        padding: 15px 35px;
        font-size: 1rem;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}