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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: #1a1a1a;
    background-color: #fafafa;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* Container */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 30px;
}

/* Header Navigation */
.header {
    background-color: #fff;
    border-bottom: 1px solid #eaeaea;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    position: relative;
    z-index: 100;
}

.logo img {
    height: 45px;
    width: auto;
    display: block;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-list a {
    font-size: 14px;
    font-weight: 500;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: #c9a227;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: #2c3e50;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
}

.mobile-menu.active {
    max-height: 400px;
    opacity: 1;
}

.mobile-nav-list {
    list-style: none;
    padding: 20px 30px;
}

.mobile-nav-list li {
    border-bottom: 1px solid #eee;
}

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

.mobile-nav-list a {
    display: block;
    padding: 18px 0;
    font-size: 16px;
    font-weight: 500;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.mobile-nav-list a:hover {
    color: #c9a227;
    padding-left: 10px;
}

/* Banner */
.banner {
    width: 100%;
    overflow: hidden;
    background-color: #f0f0f0;
}

.banner-pc {
    display: block;
    max-height: 400px;
}

.banner-mobile {
    display: none;
    max-height: 300px;
}

.banner-pc img,
.banner-mobile img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    object-position: center;
}

.banner-mobile img {
    height: 300px;
}

/* Section Base */
.section {
    padding: 100px 0;
}

.section-main-title {
    font-size: 36px;
    font-weight: 300;
    color: #222;
    margin-bottom: 60px;
    letter-spacing: 2px;
    text-align: center;
}

/* Style 1: Product Specifications - Warm Beige Gradient */
.section-specs {
    background: linear-gradient(135deg, #faf8f5 0%, #f5f0e8 50%, #efe8dc 100%);
}

.text-block-style-1 {
    text-align: center;
}

.specs-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.spec-card {
    background-color: #fff;
    padding: 35px 30px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.spec-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.spec-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #222;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #c9a227;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
}

.spec-table tr {
    border-bottom: 1px solid #eee;
}

.spec-table tr:last-child {
    border-bottom: none;
}

.spec-table td {
    padding: 14px 0;
    font-size: 15px;
}

.spec-table td:first-child {
    color: #5a6c7d;
    width: 55%;
}

.spec-table td:last-child {
    color: #1a1a1a;
    font-weight: 600;
    text-align: right;
}

/* Style 2: About Us - Soft Blue Gradient */
.section-about {
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f4f8 50%, #e0f0f5 100%);
}

.text-block-style-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
}

.about-content {
    padding: 20px 0;
}

.block-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: #c9a227;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 15px;
}

.block-title {
    font-size: 32px;
    font-weight: 300;
    color: #222;
    margin-bottom: 30px;
    line-height: 1.3;
}

.block-content p {
    font-size: 15px;
    color: #4a5568;
    margin-bottom: 18px;
    line-height: 1.8;
}

.lead-text {
    font-size: 17px !important;
    color: #2d3748 !important;
    font-weight: 500;
}

/* Style 3: Product Models - Soft Sage Green Gradient */
.section-product {
    background: linear-gradient(135deg, #f5f8f5 0%, #eef3ee 50%, #e6ede6 100%);
}

.product-intro {
    max-width: 900px;
    margin: 0 auto 60px;
    text-align: center;
}

.product-intro p {
    font-size: 17px;
    color: #4a5568;
    line-height: 1.9;
}

.text-block-style-3 {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 80px;
    align-items: start;
}

.split-left {
    position: sticky;
    top: 120px;
}

.split-left-image {
    margin-bottom: 30px;
}

.split-left-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.block-number {
    display: block;
    font-size: 72px;
    font-weight: 200;
    color: #c9a227;
    line-height: 1;
    margin-bottom: 20px;
}

.split-left h2 {
    font-size: 28px;
    font-weight: 400;
    color: #222;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 3px;
}

.product-list {
    padding-top: 20px;
}

.product-item {
    padding: 35px 0;
}

.product-item h3 {
    font-size: 22px;
    font-weight: 500;
    color: #222;
    margin-bottom: 15px;
}

.product-item p {
    font-size: 16px;
    color: #4a5568;
    line-height: 1.8;
}

.divider {
    height: 1px;
    background: linear-gradient(to right, #ddd, transparent);
}

/* Style 4: Grid Cards - Advantages - Soft Lavender Gradient */
.section-advantages {
    background: linear-gradient(135deg, #f8f6fb 0%, #f3f0f7 50%, #ede9f3 100%);
}

.text-block-style-4 {
    text-align: center;
}

.advantage-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.adv-card {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 40px 30px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.adv-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.adv-icon {
    width: 50px;
    height: 50px;
    background-color: #c9a227;
    color: #fff;
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.adv-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: #222;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.adv-card p {
    font-size: 15px;
    color: #4a5568;
    line-height: 1.7;
}

/* Style 5: Timeline - Projects - Soft Peach/Coral Gradient */
.section-projects {
    background: linear-gradient(135deg, #fdf8f5 0%, #f9f2ec 50%, #f5ebe3 100%);
}

.text-block-style-5 {
    max-width: 900px;
    margin: 0 auto;
}

.timeline-header {
    text-align: center;
    margin-bottom: 60px;
}

.subtitle {
    display: block;
    font-size: 13px;
    color: #c9a227;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 15px;
}

.timeline-header h2 {
    font-size: 36px;
    font-weight: 300;
    color: #222;
}

.timeline-list {
    position: relative;
    padding-left: 100px;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 35px;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: #e0e0e0;
}

.timeline-item {
    position: relative;
    padding-bottom: 50px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-year {
    position: absolute;
    left: -100px;
    top: 0;
    width: 70px;
    font-size: 14px;
    font-weight: 600;
    color: #c9a227;
    text-align: right;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -69px;
    top: 5px;
    width: 10px;
    height: 10px;
    background-color: #c9a227;
    border-radius: 50%;
}

.timeline-content h3 {
    font-size: 20px;
    font-weight: 500;
    color: #222;
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 16px;
    color: #4a5568;
    line-height: 1.7;
}

/* Style 6: Accordion Style - FAQ - Soft Mint Gradient */
.section-faq {
    background: linear-gradient(135deg, #f5faf8 0%, #eef6f2 50%, #e6f2ec 100%);
}

.text-block-style-6 {
    max-width: 800px;
    margin: 0 auto;
}

.text-block-style-6 h2 {
    font-size: 32px;
    font-weight: 300;
    color: #222;
    text-align: center;
    margin-bottom: 50px;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-box {
    background-color: rgba(255, 255, 255, 0.85);
    padding: 30px 35px;
    border-left: 3px solid #c9a227;
    transition: box-shadow 0.3s ease;
}

.faq-box:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.faq-box h4 {
    font-size: 17px;
    font-weight: 600;
    color: #222;
    margin-bottom: 12px;
}

.faq-box p {
    font-size: 16px;
    color: #1a1a1a;
    line-height: 1.8;
}

/* Style 7: Minimalist Contact - Soft Gray-Blue Gradient */
.section-contact {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 50%, #e0e6ed 100%);
    border-top: 1px solid rgba(255, 255, 255, 0.5);
}

.text-block-style-7 {
    max-width: 1000px;
    margin: 0 auto;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.contact-text {
    padding-right: 50px;
}

.contact-label {
    display: block;
    font-size: 13px;
    color: #c9a227;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 20px;
}

.contact-text h2 {
    font-size: 42px;
    font-weight: 300;
    color: #222;
    margin-bottom: 25px;
}

.contact-desc {
    font-size: 16px;
    color: #4a5568;
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-bottom: 25px;
    border-bottom: 1px solid #ddd;
}

.contact-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.contact-type {
    font-size: 12px;
    color: #5a6c7d;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.contact-value {
    font-size: 16px;
    color: #1a1a1a;
    font-weight: 600;
}

/* Footer - Blue Gradient Background */
.footer {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
    color: #000;
    padding: 80px 0 30px;
}

.vision-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.vision-section h3 {
    font-size: 14px;
    color: #1565c0;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 25px;
    font-weight: 600;
}

.vision-section p {
    font-size: 18px;
    line-height: 1.9;
    color: #000;
    font-weight: 400;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(21, 101, 192, 0.2);
}

.footer-bottom p {
    font-size: 14px;
    color: #000;
    font-weight: 500;
}

/* Responsive - Tablet */
@media screen and (max-width: 1024px) {
    .text-block-style-2 {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-height: 400px;
        overflow: hidden;
    }
    
    .text-block-style-3 {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .split-left {
        position: relative;
        top: 0;
        display: flex;
        align-items: center;
        gap: 30px;
    }
    
    .split-left h2 {
        writing-mode: horizontal-tb;
    }
    
    .specs-container {
        grid-template-columns: 1fr;
    }
    
    .advantage-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-wrapper {
        gap: 60px;
    }
}

/* Responsive - Mobile */
@media screen and (max-width: 768px) {
    .header-container {
        flex-direction: row;
        height: 70px;
        padding: 0 20px;
    }
    
    .logo {
        margin-bottom: 0;
    }
    
    .nav {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .banner-pc {
        display: none;
    }
    
    .banner-mobile {
        display: block;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-main-title,
    .timeline-header h2,
    .text-block-style-6 h2 {
        font-size: 26px;
    }
    
    .block-title {
        font-size: 24px;
    }
    
    .block-number {
        font-size: 48px;
    }
    
    .split-left h2 {
        font-size: 22px;
    }
    
    .product-item h3 {
        font-size: 18px;
    }
    
    .advantage-cards {
        grid-template-columns: 1fr;
    }
    
    .timeline-list {
        padding-left: 60px;
    }
    
    .timeline-list::before {
        left: 20px;
    }
    
    .timeline-year {
        left: -60px;
        width: 50px;
        font-size: 12px;
    }
    
    .timeline-item::before {
        left: -44px;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-text h2 {
        font-size: 32px;
    }
    
    .vision-section p {
        font-size: 15px;
    }
}

/* Responsive - Small Mobile */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-list {
        gap: 18px;
    }
    
    .nav-list a {
        font-size: 12px;
        letter-spacing: 0.5px;
    }
    
    .block-title {
        font-size: 20px;
    }
    
    .lead-text {
        font-size: 15px !important;
    }
    
    .block-content p {
        font-size: 14px;
    }
    
    .split-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .faq-box {
        padding: 25px 20px;
    }
    
    .contact-text h2 {
        font-size: 28px;
    }
}