/* ========== 洁博利核心技术页面样式（完整版，无省略） ========== */
:root {
    --gb-primary: #1b9b97;
    --gb-primary-dark: #147a77;
    --gb-gold: #8a6f4c;
    --gb-dark: #1e2f3b;
    --gb-gray: #5a6e7c;
    --gb-light-bg: #f8fafc;
    --gb-border: #e9edf2;
    --gb-shadow-sm: 0 4px 12px rgba(0,0,0,0.03);
    --gb-shadow-md: 0 8px 24px rgba(0,0,0,0.05);
    --gb-shadow-hover: 0 20px 30px -12px rgba(0,0,0,0.1);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #fff;
    color: var(--gb-dark);
    line-height: 1.5;
    scroll-behavior: smooth;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
.btn-primary {
    display: inline-block;
    background: var(--gb-primary);
    color: white;
    padding: 12px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}
.btn-primary:hover {
    background: var(--gb-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(27,155,151,0.3);
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gb-dark);
    margin-bottom: 12px;
}
.section-sub {
    text-align: center;
    color: var(--gb-gray);
    margin-top: 16px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.join-nav-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.2rem;
    background: #8a6f4c;
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.join-nav-link {
    display: inline-block;
    padding: 0.7rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    color: #ffffff;
    text-decoration: none;
    border-radius: 40px;
    transition: all 0.2s ease;
    background: rgba(255,255,255,0.15);
    cursor: pointer;
}
.join-nav-link:hover, .join-nav-link.active {
    background: #ffffff;
    color: #8a6f4c;
}
.nav-item-has-sub {
    position: relative;
}
.submenu-nav {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 12px 24px rgba(0,0,0,0.12);
    min-width: 180px;
    padding: 8px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
    z-index: 200;
    margin-top: 8px;
}
.nav-item-has-sub:hover .submenu-nav {
    opacity: 1;
    visibility: visible;
}
.submenu-nav li a {
    display: block;
    padding: 10px 20px;
    text-decoration: none;
    color: #2c3e4e;
    font-size: 0.9rem;
}
.submenu-nav li a:hover {
    background: #f0f9f9;
    color: #1b9b97;
}
.hero-tech {
     background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55)), url('/upload/202605/1777992624993684.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    padding: 80px 0 60px;
    text-align: center;
    color: white;
}
.hero-tech h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}
.hero-tech .tagline {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 32px;
}
.core-advantages {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    margin-top: 24px;
}
.adv-card {
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(4px);
    border-radius: 60px;
    padding: 12px 28px;
    border: 1px solid rgba(255,255,255,0.3);
    font-weight: 600;
    color: white;
}
.stats-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
}
.stat-item {
    background: white;
    border-radius: 28px;
    padding: 24px 32px;
    text-align: center;
    box-shadow: var(--gb-shadow-md);
    border: 1px solid var(--gb-border);
    flex: 1 1 180px;
}
.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--gb-primary);
    line-height: 1;
}
.stat-label {
    font-size: 0.9rem;
    color: var(--gb-gray);
    margin-top: 8px;
}
.tech-architecture {
    background: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.65)), url('../upload/202605/1778050131601663.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    border-radius: 32px;
    padding: 60px 40px;
    margin: 40px 0;
    text-align: center;
    color: white;
}
.tech-architecture h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}
.tech-architecture .section-sub {
    color: rgba(255,255,255,0.85);
    margin-top: 16px;
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
    margin: 40px 0;
}
.tech-card {
    background: white;
    border-radius: 20px;
    padding: 28px 16px;
    text-align: center;
    border: 1px solid var(--gb-border);
    transition: all 0.3s;
}
.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--gb-shadow-hover);
}
.tech-icon img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    display: block;
    margin: 0 auto 20px;
}
.tech-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}
.authority-backing {
    margin: 60px 0;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 30px;
}
.feature-card {
    background: white;
    border-radius: 24px;
    padding: 28px 20px;
    text-align: center;
    border: 1px solid var(--gb-border);
    transition: all 0.3s;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--gb-shadow-hover);
}
.feature-icon img {
    max-width: 64px;
    height: auto;
    margin-bottom: 16px;
}
.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--gb-primary);
}
.feature-card p {
    color: var(--gb-gray);
    font-size: 0.9rem;
}
.rd-strength {
    margin: 60px 0;
    background: var(--gb-light-bg);
    border-radius: 32px;
    padding: 48px 40px;
}
.rd-strength-container {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
}
.rd-text {
    flex: 1;
}
.rd-text h3 {
    font-size: 1.8rem;
    color: var(--gb-dark);
    margin-bottom: 20px;
    border-left: 4px solid var(--gb-primary);
    padding-left: 20px;
}
.rd-text p {
    color: var(--gb-gray);
    margin-bottom: 16px;
    line-height: 1.6;
}
.rd-stats {
    display: flex;
    gap: 24px;
    margin-top: 24px;
}
.rd-stat-item {
    background: white;
    border-radius: 28px;
    padding: 16px 20px;
    text-align: center;
    box-shadow: var(--gb-shadow-sm);
    flex: 1;
}
.rd-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gb-primary);
}
.rd-stat-label {
    font-size: 0.85rem;
    color: var(--gb-gray);
}
.rd-images {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.rd-img-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--gb-shadow-md);
    transition: transform 0.3s ease;
}
.rd-img-card:hover {
    transform: scale(1.02);
}
.rd-img-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
}
.rd-img-card .img-caption {
    padding: 12px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    background: white;
    color: var(--gb-dark);
}
.research-collab {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin: 60px 0;
    align-items: center;
}
.research-collab .img-box {
    flex: 1;
}
.research-collab .img-box img {
    width: 100%;
    border-radius: 24px;
    box-shadow: var(--gb-shadow-md);
}
.research-collab .content-box {
    flex: 1;
}
.research-collab h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.patent-cases {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 30px 0;
}
.patent-case-item {
    background: #fff;
    border-radius: 20px;
    padding: 20px;
    border: 1px solid var(--gb-border);
}
.patent-case-item h4 {
    color: var(--gb-primary);
    margin-bottom: 8px;
}
.case-img-place {
    background: #eef2f6;
    border-radius: 12px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    color: #8a6f4c;
    font-size: 0.8rem;
}
.solutions-whitepaper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 50px 0;
}
.solutions-card, .whitepaper-card {
    background: var(--gb-light-bg);
    border-radius: 28px;
    padding: 32px;
}
.solutions-card h3, .whitepaper-card h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    border-left: 4px solid var(--gb-primary);
    padding-left: 16px;
}
.solution-list, .download-list {
    list-style: none;
}
.solution-list li, .download-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--gb-border);
}
.download-list a {
    text-decoration: none;
    color: var(--gb-primary);
    font-weight: 500;
}
.cta-download {
    background: linear-gradient(135deg, #1b9b97 0%, #0d6d6a 100%);
    border-radius: 32px;
    padding: 48px 40px;
    color: white;
    margin: 50px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
}
.cta-text {
    flex: 1;
}
.cta-text h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.cta-form {
    flex: 1;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(4px);
    border-radius: 28px;
    padding: 28px;
}
.cta-form .form-group {
    margin-bottom: 16px;
}
.cta-form input, .cta-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: 40px;
    font-size: 0.9rem;
    background: white;
    font-family: inherit;
}
.cta-form textarea {
    border-radius: 24px;
    resize: vertical;
}
.cta-form button {
    width: 100%;
    background: var(--gb-primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    padding: 12px 32px;
    border-radius: 40px;
    font-size: 1rem;
}
.cta-form button:hover {
    background: white;
    color: var(--gb-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0,0,0,0.1);
}
.form-error {
    color: #ffcccc;
    font-size: 0.75rem;
    margin-top: 5px;
    padding-left: 12px;
    display: block;
}
input.error-field, textarea.error-field {
    border: 2px solid #ff6b6b !important;
    background-color: #fff8f8 !important;
}
.float-buttons {
    position: fixed;
    bottom: 30px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.float-btn {
    background: var(--gb-primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transition: all 0.2s;
    font-size: 0.8rem;
    text-align: center;
    line-height: 1.2;
}
.float-btn:hover {
    transform: scale(1.05);
    background: var(--gb-primary-dark);
}
.patent-row {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 48px;
    background: #ffffff;
    border-radius: 24px;
    padding: 28px;
    box-shadow: var(--gb-shadow-sm);
    border: 1px solid var(--gb-border);
    transition: all 0.3s;
}
.patent-row:hover {
    box-shadow: var(--gb-shadow-hover);
}
.patent-text {
    flex: 1;
    min-width: 240px;
}
.patent-image {
    flex: 1;
    min-width: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.patent-image img {
    max-height: 640px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}
.patent-image img:hover {
    transform: scale(1.02);
}
.patent-text h4 {
    font-size: 1.6rem;
    color: var(--gb-primary);
    margin-bottom: 12px;
    font-weight: 700;
}
.patent-number {
    font-family: monospace;
    background: #f0f4f8;
    display: inline-block;
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 0.9rem;
    margin: 12px 0 16px;
    color: var(--gb-dark);
}
.patent-auth {
    font-weight: 600;
    color: var(--gb-gold);
    margin: 12px 0 8px;
}
.patent-desc {
    color: var(--gb-gray);
    line-height: 1.6;
    margin-top: 12px;
}
@media (max-width: 768px) {
    .patent-row {
        flex-direction: column;
        padding: 20px;
    }
    .patent-row.reverse .patent-image {
        order: 1;
    }
    .patent-row.reverse .patent-text {
        order: 2;
    }
}
@media (max-width: 992px) {
    .solutions-whitepaper, .patent-cases { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
    .rd-strength-container { flex-direction: column; }
    .rd-images { width: 100%; }
}
@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .hero-tech { padding: 50px 0 40px; }
    .hero-tech h1 { font-size: 1.8rem; }
    .stats-grid { gap: 12px; }
    .stat-item { padding: 16px 20px; }
    .tech-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .tech-card { padding: 20px 12px; }
    .tech-icon img { width: 56px; height: 56px; }
    .research-collab { flex-direction: column; gap: 24px; }
    .feature-grid { grid-template-columns: 1fr; }
    .tech-architecture { padding: 30px 20px; }
    .tech-architecture h2 { font-size: 1.4rem; }
    .join-nav-menu { flex-direction: column; gap: 8px; }
    .submenu-nav { position: static; opacity: 1; visibility: visible; display: none; background: rgba(255,255,255,0.2); }
    .nav-item-has-sub:hover .submenu-nav { display: block; }
    .cta-download { padding: 30px 20px; }
    .cta-text h3 { font-size: 1.4rem; }
    .rd-strength { padding: 30px 20px; }
    .rd-text h3 { font-size: 1.5rem; }
    .rd-stats { flex-direction: column; gap: 12px; }
    .rd-images { gap: 12px; }
    .rd-img-card img { height: 120px; }
}