/* ============================================
   广西中显电子科技 - 高端LED行业风格CSS v4
   加宽布局 + 高级感视觉升级
   ============================================ */

/* --- CSS变量 --- */
:root {
    --primary: #1a56db;
    --primary-dark: #173ba7;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 24px 32px -8px rgba(0,0,0,0.12), 0 8px 16px -6px rgba(0,0,0,0.06);
    --radius: 10px;
    --radius-lg: 16px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 基础重置 --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-700);
    line-height: 1.75;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ========== 加宽容器系统 ========== */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px;
}

@media (min-width: 1920px) {
    .container {
        max-width: 1680px;
        padding: 0 48px;
    }
}

@media (max-width: 1200px) {
    .container {
        padding: 0 24px;
    }
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--dark);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.8px;
    line-height: 1.2;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 1.15rem;
    margin-bottom: 64px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 0.2px;
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    box-shadow: 0 6px 20px rgba(26,86,219,0.35);
}
.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(26,86,219,0.45);
}

.btn.secondary {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn.secondary:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

/* ============ 导航栏 ============ */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 76px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0,0,0,0.04);
}
.header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border-bottom-color: rgba(0,0,0,0.06);
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
}
.logo img {
    height: 42px;
    width: auto;
}
.logo .logo-main-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu ul {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 100%;
}
.nav-menu a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition);
    position: relative;
}
.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(26,86,219,0.06);
}
.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}
.nav-menu .login-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white) !important;
    border-radius: 10px;
    margin-left: 8px;
    box-shadow: 0 3px 12px rgba(26,86,219,0.3);
}
.nav-menu .login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,86,219,0.4);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
    z-index: 1001;
}

/* ============ 首页Banner - 加宽+高级感 ============ */
.hero {
    margin-top: 76px;
    padding: 120px 0 100px;
    background: linear-gradient(160deg, #0b1220 0%, #152642 35%, #1a56db 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}
/* 科技感网格背景 */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59,130,246,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 65%);
    border-radius: 50%;
    pointer-events: none;
}
.hero .container {
    display: flex;
    align-items: center;
    gap: 80px;
    position: relative;
    z-index: 1;
}
.hero-content { flex: 1.1; }
.hero h1 {
    font-size: 3.6rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}
.hero h1 .highlight {
    background: linear-gradient(90deg, #60a5fa, #38bdf8, #a5f3fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.subtitle {
    font-size: 1.45rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
}
.hero .description {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.9;
    margin-bottom: 44px;
    max-width: 560px;
}
.hero-buttons { display: flex; gap: 20px; }
.hero .btn.primary {
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
    box-shadow: 0 6px 24px rgba(59,130,246,0.45);
    padding: 16px 36px;
    font-size: 1.05rem;
}
.hero .btn.secondary {
    background: rgba(255,255,255,0.08);
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 16px 36px;
    font-size: 1.05rem;
}
.hero .btn.secondary:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.35);
}
.hero-image {
    flex: 1;
    text-align: center;
    position: relative;
}
.hero-image img {
    width: 100%;
    max-width: 600px;
    border-radius: 20px;
    box-shadow: 0 32px 80px rgba(0,0,0,0.35);
    border: 1px solid rgba(255,255,255,0.08);
}

/* ============ 产品中心 - 加宽布局 ============ */
.products {
    padding: 120px 0;
    background: var(--gray-50);
    position: relative;
}
.products::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gray-200), transparent);
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(26,86,219,0.15);
}
.product-image {
    height: 280px;
    overflow: hidden;
    position: relative;
}
.product-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.15) 0%, transparent 40%);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.product-card:hover .product-image::after {
    opacity: 1;
}
.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.product-card:hover .product-image img {
    transform: scale(1.08);
}
.product-content { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.product-content h3 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.3;
}
.product-content p {
    font-size: 1.05rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 20px;
    flex: 1;
}
.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.spec-tag {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid #bfdbfe;
}
.product-link {
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
    margin-top: auto;
}
.product-link:hover { gap: 12px; }

/* ============ 成功案例 - 更大气 ============ */
.cases {
    padding: 120px 0;
    background: var(--white);
    position: relative;
}
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    background: var(--white);
    display: flex;
    flex-direction: column;
}
.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(26,86,219,0.12);
}
.case-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}
.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.case-card:hover .case-image img {
    transform: scale(1.08);
}
.case-content { padding: 24px 28px 28px; flex: 1; display: flex; flex-direction: column; }
.case-content h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 10px;
}
.case-content p {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 16px;
    flex: 1;
}
.case-tag {
    display: inline-block;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: var(--primary);
    padding: 5px 14px;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid #bfdbfe;
    align-self: flex-start;
    margin-top: auto;
}

/* ============ 关于我们 ============ */
.about {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    position: relative;
}
.about-content {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-top: 56px;
}
.about-text { flex: 1; }
.about-text h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}
.about-text > p {
    color: var(--gray-700);
    line-height: 1.85;
    margin-bottom: 18px;
    font-size: 1.05rem;
}
.about-mission {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 28px 0;
    padding: 28px;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: var(--radius-lg);
    border: 1px solid #bfdbfe;
}
.mission-item { display: flex; flex-direction: column; gap: 6px; }
.mission-item h4 {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.mission-item h4 i {
    font-size: 1rem;
    width: 24px;
    text-align: center;
}
.mission-item p {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.7;
    margin: 0;
    padding-left: 34px;
}
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-top: 28px;
}
.feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--gray-700);
    font-weight: 600;
    padding: 12px 16px;
    background: var(--white);
    border-radius: 10px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}
.feature i { color: var(--primary); font-size: 1.15rem; }
.about-image { flex: 1; }
.about-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

/* ============ 联系我们 ============ */
.contact {
    padding: 120px 0;
    background: var(--white);
    position: relative;
}
.contact-content {
    display: flex;
    gap: 80px;
    margin-top: 56px;
}
.contact-info { flex: 1; }
.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 14px;
}
.contact-info > p {
    color: var(--gray-700);
    margin-bottom: 40px;
    font-size: 1.1rem;
}
.contact-details { display: flex; flex-direction: column; gap: 28px; }
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.contact-item:hover {
    transform: translateX(4px);
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}
.contact-item > i {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(26,86,219,0.25);
}
.contact-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}
.contact-item p {
    font-size: 1.05rem;
    color: var(--gray-700);
    line-height: 1.6;
}

/* 联系表单 */
.contact-form {
    flex: 1;
    background: linear-gradient(135deg, var(--gray-50) 0%, #f8fafc 100%);
    padding: 44px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}
.contact-form h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 28px;
}
.form-group { margin-bottom: 20px; }
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-700);
    background: var(--white);
    transition: var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26,86,219,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-form .btn {
    width: 100%;
    justify-content: center;
    padding: 16px;
    font-size: 1.05rem;
}

/* ============ 页脚 ============ */
.footer {
    background: linear-gradient(180deg, #0b1220 0%, #0f172a 100%);
    color: rgba(255,255,255,0.7);
    padding: 80px 0 0;
    position: relative;
}
.footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(59,130,246,0.4), transparent);
}
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 64px;
    padding-bottom: 56px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-column .logo {
    margin-bottom: 20px;
}
.footer-column .logo img {
    height: 40px;
}
.footer-column .logo .logo-main-text {
    background: linear-gradient(135deg, #60a5fa, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.2rem;
}
.footer-description {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.55);
    margin-bottom: 24px;
}
.social-icons {
    display: flex;
    gap: 12px;
}
.social-icons a {
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.06);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.55);
    font-size: 1.15rem;
    transition: var(--transition);
}
.social-icons a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26,86,219,0.35);
}
.social-icons a.social-wechat { color: #07C160; background: rgba(7,193,96,0.12); }
.social-icons a.social-wechat:hover { background: #07C160; color: #fff; box-shadow: 0 8px 20px rgba(7,193,96,0.35); }
.social-icons a.social-qq { color: #12B7F5; background: rgba(18,183,245,0.12); }
.social-icons a.social-qq:hover { background: #12B7F5; color: #fff; box-shadow: 0 8px 20px rgba(18,183,245,0.35); }
.social-icons a.social-helmet { color: #FF6B00; background: rgba(255,107,0,0.12); }
.social-icons a.social-helmet:hover { background: #FF6B00; color: #fff; box-shadow: 0 8px 20px rgba(255,107,0,0.35); }

/* QR码弹窗 */
.qr-modal-overlay, .login-modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    display: none; align-items: center; justify-content: center;
    z-index: 9999; padding: 20px;
}
.qr-modal, .login-modal {
    background: #fff; border-radius: 16px; padding: 28px;
    max-width: 360px; width: 100%; text-align: center;
    position: relative; box-shadow: 0 24px 48px rgba(0,0,0,0.2);
    animation: fadeInUp 0.3s ease;
}
.qr-modal-close, .login-modal-close {
    position: absolute; top: 12px; right: 16px;
    background: none; border: none; font-size: 24px; color: #999;
    cursor: pointer; line-height: 1;
}
.qr-modal-close:hover, .login-modal-close:hover { color: #333; }
.qr-modal h3, .login-modal h3 {
    font-size: 1.15rem; color: var(--gray-900); margin-bottom: 16px;
    font-weight: 600;
}
.qr-modal img {
    width: 220px; height: 220px; object-fit: contain;
    border-radius: 12px; margin: 0 auto 12px; display: block;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.qr-modal p { font-size: 0.9rem; color: var(--gray-700); }
.login-modal input {
    width: 100%; padding: 12px 16px; margin-bottom: 12px;
    border: 2px solid var(--gray-200); border-radius: 10px;
    font-size: 1rem; transition: var(--transition);
}
.login-modal input:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}
.login-modal button#quoteLoginSubmit {
    width: 100%; padding: 12px; background: var(--primary);
    color: #fff; border: none; border-radius: 10px;
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: var(--transition);
}
.login-modal button#quoteLoginSubmit:hover {
    background: var(--primary-dark); transform: translateY(-1px);
}

.footer-column h4 {
    color: var(--white);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 24px;
}
.footer-column ul { display: flex; flex-direction: column; gap: 14px; }
.footer-column ul a,
.footer-column .contact-list li {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.55);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}
.footer-column ul a:hover,
.footer-column .contact-list li:hover {
    color: rgba(255,255,255,0.9);
    transform: translateX(4px);
}
.footer-column .contact-list li i {
    color: var(--primary-light);
    width: 18px;
    text-align: center;
}
.footer-bottom {
    padding: 28px 0;
    text-align: center;
    font-size: 0.92rem;
    color: rgba(255,255,255,0.4);
    line-height: 1.8;
}
.footer-bottom a {
    color: rgba(255,255,255,0.55);
}
.footer-bottom a:hover { color: var(--white); }

/* ============ 响应式 ============ */
@media (max-width: 1200px) {
    .product-grid,
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .about-content,
    .contact-content { gap: 48px; }
    .hero .container { gap: 48px; }
    .hero h1 { font-size: 2.8rem; }
}

@media (max-width: 1024px) {
    .footer-content { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .hero h1 { font-size: 2.4rem; }
}

@media (max-width: 768px) {
    .header { height: 68px; }
    .nav-menu { display: none; }
    .mobile-menu-btn { display: block; }
    .hero { margin-top: 68px; padding: 72px 0; }
    .hero .container { flex-direction: column; text-align: center; gap: 48px; }
    .hero h1 { font-size: 2.2rem; }
    .hero .description { margin: 0 auto 36px; max-width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero-image { display: none; }
    .about-content,
    .contact-content { flex-direction: column; gap: 48px; }
    .product-grid,
    .case-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; gap: 36px; }
    .section-title { font-size: 1.9rem; }
    .section-subtitle { font-size: 1rem; margin-bottom: 44px; }
    .products, .cases, .about, .contact { padding: 80px 0; }
    .about-features { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.7rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .section-title { font-size: 1.6rem; }
    .btn { padding: 12px 24px; font-size: 0.9rem; }
    .contact-form { padding: 28px; }
    .container { padding: 0 16px; }
}


/* Logo with English subtitle */
.logo-text-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
}

.logo-main-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo-sub-text {
    font-size: 0.6rem;
    font-weight: 500;
    color: #6b7fa8;
    -webkit-text-fill-color: #6b7fa8;
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    letter-spacing: 0.5px;
    line-height: 1;
    padding: 0 2px;
    white-space: nowrap;
    text-transform: none;
}

.footer-column .logo-main-text {
    background: linear-gradient(135deg, #60a5fa, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.2rem;
}

.footer-column .logo-sub-text {
    font-size: 0.5rem;
    color: rgba(96, 165, 250, 0.7);
    -webkit-text-fill-color: rgba(96, 165, 250, 0.7);
}

/* ============ 全屏英雄区 ============ */
.hero-full {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(12, 20, 69, 0.85) 0%, rgba(26, 54, 93, 0.75) 100%);
}
.hero-full .hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 0 32px;
}
.hero-full .hero-logo {
    margin-bottom: 32px;
}
.hero-full .hero-logo img {
    height: 80px;
    width: auto;
    margin: 0 auto;
    filter: brightness(0) invert(1);
}
.hero-full h1 {
    font-size: 3.2rem;
    font-weight: 900;
    margin-bottom: 16px;
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.hero-full .subtitle {
    font-size: 1.4rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 24px;
    font-weight: 500;
}
.hero-divider {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    margin: 0 auto 24px;
    border-radius: 2px;
}
.hero-full .description {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 48px;
    letter-spacing: 1px;
}
.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    text-align: center;
    z-index: 2;
}
.scroll-hint i {
    display: block;
    margin-top: 8px;
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ============ 页面标题区 ============ */
.page-hero {
    margin-top: 76px;
    padding: 100px 0 80px;
    text-align: center;
    color: var(--white);
}
.page-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.page-hero .page-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.8);
}

/* ============ 公司简介 ============ */
.intro-section {
    padding: 100px 0;
    background: var(--white);
}
.intro-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}
.intro-text p {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: 24px;
    line-height: 1.9;
}
.intro-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.stat-item {
    text-align: center;
    padding: 32px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}
.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 8px;
}
.stat-label {
    font-size: 1rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* ============ 产品预览区块 ============ */
.products-preview {
    padding: 100px 0;
    background: var(--gray-50);
}
.products-preview .product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}
.products-preview .product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.products-preview .product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}
.products-preview .product-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}
.products-preview .product-icon i {
    font-size: 1.8rem;
    color: var(--white);
}
.products-preview .product-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.products-preview .product-card p {
    font-size: 0.95rem;
    color: var(--gray-500);
}

/* ============ 案例预览区块 ============ */
.cases-preview {
    padding: 100px 0;
    background: var(--white);
}
.cases-preview .cases-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}
.cases-preview .case-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-900);
}
.cases-preview .case-card img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: var(--transition);
}
.cases-preview .case-card:hover img {
    transform: scale(1.05);
}
.cases-preview .case-card.large img {
    height: 360px;
}
.cases-preview .case-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    color: var(--white);
}
.cases-preview .case-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.cases-preview .case-info p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 12px;
}
.cases-preview .case-link {
    color: #60a5fa;
    font-size: 0.9rem;
    font-weight: 600;
}

/* ============ 咨询区块 ============ */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    text-align: center;
    color: var(--white);
}
.cta-section h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.cta-section p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 32px;
}
.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}
.cta-section .btn.primary {
    background: var(--white);
    color: var(--primary);
}
.cta-section .btn.secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.4);
}
.cta-section .btn.secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.6);
}

/* ============ 产品中心全页 ============ */
.products-full {
    padding: 80px 0;
    background: var(--gray-50);
}
.product-block {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px;
    margin-bottom: 40px;
    border: 1px solid var(--gray-200);
}
.product-block-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-200);
}
.product-block-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-top: 12px;
    margin-bottom: 4px;
}
.product-block-header h2 a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s;
}
.product-block-header h2 a:hover {
    color: var(--primary);
}
.product-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}
.product-tagline {
    color: var(--gray-500);
    font-size: 1.05rem;
    margin-top: 8px;
}
.product-detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 32px;
}
.product-detail-image img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.product-detail-specs {
    display: flex;
    flex-direction: column;
}
.model-list {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 20px;
    font-size: 1rem;
    color: var(--gray-700);
}
.model-list strong {
    color: var(--dark);
}
.product-specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    font-size: 0.95rem;
    flex: 1;
}
.product-specs-table tr {
    border-bottom: 1px solid var(--gray-200);
}
.product-specs-table tr:last-child {
    border-bottom: none;
}
.product-specs-table td {
    padding: 10px 0;
}
.product-specs-table td:first-child {
    color: var(--gray-500);
    width: 40%;
}
.product-specs-table td:last-child {
    color: var(--dark);
    font-weight: 600;
}
.product-features-list {
    margin-bottom: 32px;
}
.product-features-list ul {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}
.product-features-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    color: var(--gray-700);
}
.product-features-list li i {
    color: var(--primary);
}
.product-block-btn {
    text-align: left;
}
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

/* ============ 案例列表 ============ */
.cases-filter {
    padding: 40px 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}
.filter-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-100);
    transition: var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
}
.cases-list {
    padding: 80px 0;
    background: var(--gray-50);
}
.cases-grid-full {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.case-item {
    display: flex;
    gap: 24px;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.case-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.case-image {
    position: relative;
    width: 280px;
    flex-shrink: 0;
}
.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.case-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}
.case-details {
    padding: 24px;
    flex: 1;
}
.case-details h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}
.case-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}
.case-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--gray-500);
}
.case-meta i {
    color: var(--primary);
}
.case-details p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============ 新闻列表 ============ */
.news-section {
    padding: 80px 0;
    background: var(--white);
}
.news-list {
    max-width: 900px;
    margin: 0 auto;
}
.news-item {
    display: flex;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--gray-200);
}
.news-item:last-child {
    border-bottom: none;
}
.news-date {
    text-align: center;
    width: 80px;
    flex-shrink: 0;
}
.news-day {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}
.news-month {
    font-size: 0.85rem;
    color: var(--gray-500);
}
.news-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}
.news-content h3 a:hover {
    color: var(--primary);
}
.news-content p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}
.news-meta {
    display: flex;
    gap: 20px;
}
.news-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--gray-500);
}
.news-meta i {
    color: var(--primary);
}
.pagination {
    text-align: center;
    margin-top: 48px;
}
.page-info {
    font-size: 0.95rem;
    color: var(--gray-500);
}

/* ============ 视频列表 ============ */
.videos-filter {
    padding: 40px 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}
.videos-section {
    padding: 80px 0;
    background: var(--gray-50);
}
.videos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.video-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.video-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.video-thumbnail {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}
.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}
.video-play-btn i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-left: 4px;
}
.video-item:hover .video-play-btn {
    background: var(--primary);
}
.video-item:hover .video-play-btn i {
    color: var(--white);
}
.video-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0,0,0,0.75);
    color: var(--white);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}
.video-info {
    padding: 24px;
}
.video-tag {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}
.video-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.video-info p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .intro-content { grid-template-columns: 1fr; gap: 48px; }
    .cases-preview .cases-grid { grid-template-columns: 1fr 1fr; }
    .cases-preview .case-card.large { grid-column: span 2; }
    .cases-grid-full { grid-template-columns: 1fr; }
    .videos-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero-full h1 { font-size: 2.4rem; }
    .products-preview .product-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-preview .cases-grid { grid-template-columns: 1fr; }
    .cases-preview .case-card.large { grid-column: span 1; }
    .product-block-content { grid-template-columns: 1fr; }
    .product-block-content.reverse { direction: ltr; }
    .case-item { flex-direction: column; }
    .case-image { width: 100%; height: 200px; }
    .videos-grid { grid-template-columns: 1fr; }
    .news-item { flex-direction: column; gap: 16px; }
}
/* ICP 备案号样式 */
.footer-bottom-content {
    border-top: 1px solid #444;
    margin-top: 30px;
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #aaa;
}

.footer-bottom-content .copyright {
    margin-bottom: 5px;
}

.footer-bottom-content .icp {
    color: #888;
    font-size: 12px;
}

.footer-bottom-content .icp a {
    color: #888;
    text-decoration: none;
}

.footer-bottom-content .icp a:hover {
    color: #fff;
}