:root {
    --primary-gradient: linear-gradient(135deg, #0a4d8c 0%, #1a7fc7 50%, #3fb5d8 100%);
    --accent-color: #0a4d8c;
    --accent-light: #3fb5d8;
    --text-dark: #1a2b3c;
    --text-light: #5a6b7c;
    --bg-cream: #fafbfc;
    --bg-white: #ffffff;
    --shadow-soft: 0 8px 30px rgba(10, 77, 140, 0.08);
    --shadow-hover: 0 15px 50px rgba(10, 77, 140, 0.12);
    --border-radius: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Noto Sans JP', 'Montserrat', sans-serif;
    background: var(--bg-cream);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

body.lang-en {
    font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
}

body.lang-jp {
    font-family: 'Noto Sans JP', 'Montserrat', sans-serif;
}

/* Background decoration */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: var(--primary-gradient);
    opacity: 0.03;
}

.bg-circle:nth-child(1) {
    width: 600px;
    height: 600px;
    top: -150px;
    right: -150px;
}

.bg-circle:nth-child(2) {
    width: 400px;
    height: 400px;
    bottom: -100px;
    left: -100px;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    cursor: pointer;
}

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

.logo-text {
    display: none;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 4px 16px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 20px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent-color);
    background: rgba(10, 77, 140, 0.05);
}

.lang-switcher {
    display: flex;
    gap: 3px;
    margin-left: 15px;
    padding: 4px;
    background: rgba(10, 77, 140, 0.05);
    border-radius: 25px;
}

.lang-btn {
    padding: 6px 14px;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 20px;
    transition: var(--transition);
    font-family: inherit;
}

.lang-btn:hover {
    color: var(--accent-color);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--accent-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-nav {
    display: none;
    position: fixed;
    top: 61px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
    flex-direction: column;
    gap: 10px;
}

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

.mobile-nav-link {
    padding: 12px 20px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 1rem;
    border-radius: 10px;
    transition: var(--transition);
    text-align: center;
}

.mobile-nav-link:hover {
    color: var(--accent-color);
    background: rgba(10, 77, 140, 0.05);
}

/* Hero Section */
.hero {
    min-height: auto;
    padding: 100px 30px 40px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    color: var(--text-light);
    font-weight: 400;
    letter-spacing: 1px;
    margin-bottom: 30px;
}

.hero-logo {
    width: 260px;
    height: auto;
    margin-top: 18px;
}

/* Sections */
.section {
    padding: 50px 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(1.3rem, 3vw, 1.6rem);
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    position: relative;
    color: var(--accent-color);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

/* Info Card */
.info-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.company-names {
    display: grid;
    gap: 10px;
}

.company-name-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 15px;
    background: var(--bg-cream);
    border-radius: 8px;
}

.company-name-item .lang-label {
    background: var(--primary-gradient);
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    min-width: 38px;
    text-align: center;
}

.company-name-item .name {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Philosophy */
.philosophy-item {
    padding: 15px 20px;
    margin-bottom: 10px;
    background: var(--bg-white);
    border-radius: 10px;
    box-shadow: var(--shadow-soft);
    font-size: 0.95rem;
}

.philosophy-item .lang {
    color: var(--accent-color);
    font-weight: 600;
}

/* About */
.about-content {
    font-size: 0.95rem;
    line-height: 1.9;
}

.about-highlight {
    background: linear-gradient(120deg, rgba(63, 181, 216, 0.15) 0%, rgba(10, 77, 140, 0.15) 100%);
    padding: 1px 6px;
    border-radius: 4px;
}

/* Services - 原网站风格 */
.services-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.services-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}

.service-item {
    margin-bottom: 20px;
    padding-left: 5px;
}

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

.service-main {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.service-main::before {
    content: '◆';
    color: var(--accent-color);
    margin-right: 8px;
}

.service-sub {
    padding-left: 20px;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.8;
}

.service-sub-item::before {
    content: '・';
    color: var(--accent-light);
}

.service-note {
    margin-top: 8px;
    padding: 10px 15px;
    background: rgba(10, 77, 140, 0.05);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-left: 20px;
}

/* Contact */
.contact-section {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-soft);
}

.contact-list {
    margin-bottom: 30px;
}

.contact-line {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(10, 77, 140, 0.08);
    font-size: 0.95rem;
}

.contact-line:last-child {
    border-bottom: none;
}

.contact-line .emoji {
    font-size: 1.1rem;
}

.contact-line .label {
    color: var(--text-light);
    font-weight: 500;
}

.contact-line .value {
    color: var(--text-dark);
}

.contact-line .value a {
    color: var(--accent-color);
    text-decoration: none;
}

.contact-line .sub {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-left: 3px;
}

.qr-codes {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.qr-item {
    text-align: center;
    padding: 15px;
    background: var(--bg-cream);
    border-radius: 12px;
}

.qr-item img {
    width: 90px;
    height: 90px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qr-item p {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

.registration-info {
    background: var(--bg-cream);
    padding: 20px;
    border-radius: 12px;
}

.registration-info h4 {
    font-size: 0.95rem;
    color: var(--accent-color);
    margin-bottom: 15px;
    text-align: center;
}

.registration-row {
    display: flex;
    gap: 10px;
    padding: 8px 0;
    font-size: 0.9rem;
}

.registration-row .label {
    color: var(--text-light);
    min-width: 100px;
}

.registration-row .value {
    color: var(--text-dark);
}

.seo-note {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}
.seo-note strong { color: var(--accent-color); }

/* Contact Form */
.contact-form {
    background: var(--bg-cream);
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 22px;
}

.contact-form .form-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
    text-align: left;
}

.contact-form label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(10, 77, 140, 0.15);
    background: rgba(255, 255, 255, 0.9);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

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

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: rgba(10, 77, 140, 0.35);
    box-shadow: 0 0 0 4px rgba(10, 77, 140, 0.08);
}

.send-btn {
    width: fit-content;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border: 1px solid rgba(10, 77, 140, 0.18);
    border-radius: 12px;
    background: rgba(10, 77, 140, 0.08);
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.send-btn:hover {
    background: rgba(10, 77, 140, 0.12);
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.form-status {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
    min-height: 1.2em;
}

/* Footer */
footer {
    background: var(--bg-white);
    padding: 30px;
    margin-top: 30px;
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.03);
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo {
    width: 45px;
    height: auto;
}

.footer-brand {
    font-weight: 600;
    font-size: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    width: 100%;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(10, 77, 140, 0.1);
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 8px 15px;
    }

    .nav-link {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .lang-switcher {
        margin-left: 8px;
    }

    .lang-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    .hero {
        padding: 80px 15px 30px;
    }

    .hero-logo {
        width: 180px;
    }

    .section {
        padding: 35px 15px;
    }

    .info-card, .services-card, .contact-section {
        padding: 20px 15px;
    }

    .company-name-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .contact-line {
        flex-wrap: wrap;
        font-size: 0.9rem;
    }

    .qr-codes {
        gap: 10px;
    }

    .qr-item {
        padding: 10px;
    }

    .qr-item img {
        width: 70px;
        height: 70px;
    }

    .registration-row {
        flex-direction: column;
        gap: 2px;
    }

    footer {
        padding: 20px 15px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo-text {
        display: none;
    }
}

/* Language switching */
[data-lang] { display: none; }
[data-lang="zh"] { display: block; }
span[data-lang], a[data-lang] { display: none; }
span[data-lang="zh"], a[data-lang="zh"] { display: inline; }

body.lang-en [data-lang] { display: none; }
body.lang-en [data-lang="en"] { display: block; }
body.lang-en span[data-lang], body.lang-en a[data-lang] { display: none; }
body.lang-en span[data-lang="en"], body.lang-en a[data-lang="en"] { display: inline; }

body.lang-jp [data-lang] { display: none; }
body.lang-jp [data-lang="jp"] { display: block; }
body.lang-jp span[data-lang], body.lang-jp a[data-lang] { display: none; }
body.lang-jp span[data-lang="jp"], body.lang-jp a[data-lang="jp"] { display: inline; }

/* Mobile menu button animation */
.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.form-title{
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 12px 0;
    line-height: 1.2;
}

@media (max-width: 480px) {
    .send-btn { width: 100%; }
}

/* Confirm modal */
.confirm-modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 18px;
}
.confirm-modal.active { display: flex; }
.confirm-backdrop{
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(2px);
}
.confirm-dialog{
    position: relative;
    width: min(560px, 100%);
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: 0 20px 70px rgba(0,0,0,0.18);
    padding: 18px 18px 14px;
    overflow: hidden;
}
.confirm-dialog::before{
    content:'';
    position:absolute;
    top:0; left:0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
}
.confirm-title{
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-dark);
    margin: 10px 0 12px;
}
.confirm-content{
    background: var(--bg-cream);
    border: 1px solid rgba(10, 77, 140, 0.10);
    border-radius: 12px;
    padding: 12px;
}
.confirm-row{
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(10, 77, 140, 0.08);
    font-size: 0.92rem;
}
.confirm-row:last-child{ border-bottom: none; }
.confirm-label{
    color: var(--text-light);
    font-weight: 700;
}
.confirm-value{
    color: var(--text-dark);
    word-break: break-word;
}
.confirm-message{
    white-space: pre-wrap;
    line-height: 1.7;
}
.confirm-actions{
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 12px;
}
.confirm-btn{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid rgba(10, 77, 140, 0.18);
    background: rgba(10, 77, 140, 0.06);
    color: var(--accent-color);
    font-weight: 800;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}
.confirm-btn:hover{
    background: rgba(10, 77, 140, 0.10);
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}
.confirm-btn.ok{
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}
.confirm-btn.ok:hover{
    box-shadow: var(--shadow-hover);
}
.confirm-btn:disabled{
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
@media (max-width: 480px){
    .confirm-row{ grid-template-columns: 72px 1fr; }
    .confirm-actions{ flex-direction: column; }
    .confirm-btn{ width: 100%; }
}