/* 7WEB Premium CSS Design System */

:root {
    --primary-color: #3778cd;
    --primary-hover: #265ca5;
    --secondary-color: #1e73be;
    --text-color: #333333;
    --text-light: #777777;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Lato', 'PingFang TC', 'Heiti TC', 'Microsoft JhengHei', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.header-inner {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 700;
    font-size: 16px;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 20px 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4ecf7 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 50px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1.2;
    text-align: left;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    transition: var(--transition);
}

.hero-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.18);
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: #2d3748;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

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

/* Section Common */
.section {
    padding: 80px 20px;
}

.section-bg {
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 800;
    color: #2d3748;
    margin-bottom: 15px;
    position: relative;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 15px auto 0;
}

.section-title p {
    color: var(--text-light);
}

/* Services / Features Grid */
.grid-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.card .icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50px;
    background: rgba(55, 120, 205, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 25px;
}

.card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #2d3748;
}

.card p {
    color: var(--text-light);
    font-size: 15px;
}

/* Feature Showcase (Split layout) */
.split-section {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 50px;
}

.split-content {
    flex: 1;
}

.split-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #2d3748;
}

.split-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.split-image {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 100%);
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-weight: bold;
}

/* Contact Form Section */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    color: #2d3748;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(55, 120, 205, 0.15);
}

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

.form-status {
    margin-top: 15px;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    display: none;
}

.form-status.success {
    background-color: #c6f6d5;
    color: #22543d;
    display: block;
}

.form-status.error {
    background-color: #fed7d7;
    color: #742a2a;
    display: block;
}

/* Blog Section */
.blog-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.blog-item {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

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

.blog-img {
    height: 200px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, #3778cd 0%, #1e73be 100%);
}

.blog-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-item:hover .blog-img img {
    transform: scale(1.05);
}

.blog-body {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-meta {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 10px;
    display: flex;
    gap: 15px;
}

.blog-meta span.category {
    color: var(--primary-color);
    font-weight: 700;
}

.blog-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 15px;
    line-height: 1.4;
}

.blog-body p {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 20px;
    flex-grow: 1;
}

.blog-link {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.blog-link:hover {
    color: var(--primary-hover);
}

/* Single Post Content */
.post-header {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4ecf7 100%);
    padding: 140px 20px 80px;
    text-align: center;
}

.post-header-inner {
    max-width: 800px;
    margin: 0 auto;
}

.post-header h1 {
    font-size: 40px;
    font-weight: 800;
    color: #2d3748;
    margin-bottom: 20px;
}

.post-cover {
    width: 100%;
    max-height: 450px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.post-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.post-content {
    font-size: 17px;
    line-height: 1.8;
    color: #333333;
}

.post-content h2, .post-content h3 {
    color: #2d3748;
    margin: 40px 0 20px;
    font-weight: 700;
}

.post-content h2 { font-size: 26px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.post-content h3 { font-size: 22px; }

.post-content p {
    margin-bottom: 25px;
}

.post-content ul, .post-content ol {
    margin-bottom: 25px;
    padding-left: 20px;
}

.post-content li {
    margin-bottom: 10px;
}

.post-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 15px 20px;
    background-color: var(--bg-light);
    margin: 30px 0;
    color: var(--text-light);
    font-style: italic;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: rgba(255, 255, 255, 0.9);
    padding: 60px 20px 20px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 40px;
}

.footer-col h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-col p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 15px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive CSS */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        border-top: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 15px 20px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a:hover, .nav-links a.active {
        background-color: var(--bg-light);
        border-bottom-color: var(--border-color);
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    .hero-container {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .split-section {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}