/* ============================================
   安徽金动动力机电有限公司 - 企业官网
   主色调：蓝色 + 金色
   ============================================ */

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

:root {
    --blue-dark: #0a1628;
    --blue: #0d1f3c;
    --blue-mid: #1a3a6b;
    --blue-light: #2b5ea7;
    --gold: #c8a44e;
    --gold-light: #e0c878;
    --gold-dark: #a07d30;
    --white: #ffffff;
    --gray-50: #f8f9fb;
    --gray-100: #f0f2f5;
    --gray-200: #e2e6ea;
    --gray-300: #c5cdd5;
    --gray-400: #94a3b0;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-700);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* === 顶部导航 === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(200, 164, 78, 0.15);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 22, 40, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 36px;
    color: var(--gold);
    filter: drop-shadow(0 0 10px rgba(200, 164, 78, 0.5));
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(200, 164, 78, 0.4)); }
    50% { filter: drop-shadow(0 0 16px rgba(200, 164, 78, 0.7)); }
}

.logo-text h1 {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.logo-text p {
    font-size: 10px;
    color: var(--gold-light);
    letter-spacing: 2px;
    font-weight: 500;
}

.nav ul {
    display: flex;
    gap: 8px;
}

.nav a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 15px;
    padding: 8px 18px;
    border-radius: 6px;
    transition: var(--transition);
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: var(--gold);
    background: rgba(200, 164, 78, 0.08);
}

/* === 语言切换按钮 === */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 16px;
    padding: 4px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 30px;
    transition: var(--transition);
}

.lang-switch:hover {
    border-color: rgba(200, 164, 78, 0.4);
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: transparent;
    border: none;
    border-radius: 22px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

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

.lang-btn.active {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    color: var(--blue-dark);
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(200, 164, 78, 0.35);
}

.lang-flag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0;
}

.lang-btn.active .lang-flag {
    background: rgba(10, 22, 40, 0.18);
    color: var(--blue-dark);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 26px;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
    border-radius: 2px;
}

/* === Hero 区域 === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 40%, var(--blue-mid) 70%, #1a2a4a 100%);
}

/* 天鹅湖背景图 */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 40%;
}

/* 蓝色渐变遮罩 - 与网站整体风格融合 */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: linear-gradient(
        135deg,
        rgba(10, 22, 40, 0.82) 0%,
        rgba(13, 31, 60, 0.75) 30%,
        rgba(26, 58, 107, 0.68) 60%,
        rgba(10, 22, 40, 0.78) 100%
    );
}

.hero-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(200, 164, 78, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(43, 94, 167, 0.05) 0%, transparent 50%);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 220px;
    z-index: 2;
    background: linear-gradient(to top, rgba(10, 22, 40, 0.85) 0%, transparent 100%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 120px 24px 60px;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 24px;
    background: rgba(200, 164, 78, 0.1);
    border: 1px solid rgba(200, 164, 78, 0.3);
    border-radius: 50px;
    color: var(--gold-light);
    font-size: 14px;
    letter-spacing: 2px;
    margin-bottom: 32px;
    animation: fadeInDown 0.8s ease;
}

.hero-badge-icon {
    font-size: 18px;
}

.hero-content h2 {
    font-size: 48px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 3px;
    margin-bottom: 16px;
    line-height: 1.3;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gold);
    margin-bottom: 12px;
    letter-spacing: 1px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.5s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--blue-dark);
    box-shadow: 0 4px 20px rgba(200, 164, 78, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(200, 164, 78, 0.4);
}

.btn-outline {
    border: 2px solid rgba(200, 164, 78, 0.5);
    color: var(--gold);
}

.btn-outline:hover {
    background: rgba(200, 164, 78, 0.1);
    border-color: var(--gold);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounce 2s ease infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(200, 164, 78, 0.5);
    border-bottom: 2px solid rgba(200, 164, 78, 0.5);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Section 通用 === */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 50px;
    color: var(--gold-dark);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-header p {
    font-size: 16px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* === 主营业务 === */
.business {
    background: var(--white);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.business-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gold), var(--blue-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.business-card:hover {
    border-color: var(--gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.business-card:hover::before {
    transform: scaleX(1);
}

.business-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
    color: var(--gold);
}

.business-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.business-card p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.8;
}

/* === 品牌展示 === */
.brands {
    position: relative;
    background: var(--blue-dark);
    overflow: hidden;
}

/* 工厂背景图 */
.brands-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.brands-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 50%;
    /* 背景虚化效果 */
    filter: blur(8px) brightness(0.45) saturate(0.6);
    transform: scale(1.05);
}

/* 蓝色遮罩层 - 与网站整体风格融合 */
.brands-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: linear-gradient(
        135deg,
        rgba(10, 22, 40, 0.72) 0%,
        rgba(13, 31, 60, 0.65) 30%,
        rgba(26, 58, 107, 0.58) 60%,
        rgba(10, 22, 40, 0.72) 100%
    );
}

.brands-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(200, 164, 78, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(43, 94, 167, 0.04) 0%, transparent 50%);
}

/* 品牌内容区置于最上层 */
.brands-content {
    position: relative;
    z-index: 2;
}

/* 品牌区域标题适配深色背景 */
.brands .section-header h2 {
    color: var(--white);
}

.brands .section-header p {
    color: rgba(255, 255, 255, 0.55);
}

.brands .section-tag {
    background: rgba(200, 164, 78, 0.1);
    border-color: rgba(200, 164, 78, 0.25);
    color: var(--gold-light);
}

.brand-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.brand-category {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 36px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: var(--transition);
}

.brand-category:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(200, 164, 78, 0.35);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.brand-category h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gold);
    display: inline-block;
}

.brand-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.brand-list span {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.brand-list span:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(200, 164, 78, 0.12);
}

/* 品牌标签可点击样式 */
.brand-list span {
    cursor: pointer;
}

.brand-list span:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(200, 164, 78, 0.12);
    transform: translateY(-2px);
}

/* === 品牌详情弹窗 === */
.brand-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 22, 40, 0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    padding: 24px;
}

.brand-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.brand-modal {
    background: var(--white);
    border-radius: 20px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
    transform: translateY(30px) scale(0.96);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand-modal-overlay.active .brand-modal {
    transform: translateY(0) scale(1);
}

.brand-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.brand-modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-900);
    border-color: var(--gray-300);
    transform: rotate(90deg);
}

.brand-modal-body {
    padding: 48px 40px 40px;
    text-align: center;
}

.brand-modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    color: var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-modal-icon svg {
    width: 64px;
    height: 64px;
}

.brand-modal-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 50px;
    color: var(--gold-dark);
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.brand-modal-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.brand-modal-subtitle {
    font-size: 15px;
    color: var(--gold-dark);
    margin-bottom: 24px;
    font-weight: 600;
    letter-spacing: 1px;
}

.brand-modal-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.9;
    margin-bottom: 28px;
    text-align: left;
}

.brand-modal-highlights {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
}

.brand-modal-highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    text-align: left;
    transition: var(--transition);
}

.brand-modal-highlight-item:hover {
    border-color: var(--gold);
    background: rgba(200, 164, 78, 0.03);
}

.brand-modal-highlight-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--gold);
    margin-top: 1px;
}

.brand-modal-highlight-item span {
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.6;
}

.brand-modal-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.brand-modal-info span {
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.03), rgba(200, 164, 78, 0.05));
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 13px;
    color: var(--gray-700);
    font-weight: 500;
}

/* 品牌弹窗滚动条 */
.brand-modal::-webkit-scrollbar {
    width: 6px;
}

.brand-modal::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 0 20px 20px 0;
}

.brand-modal::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 3px;
}

.brand-modal::-webkit-scrollbar-thumb:hover {
    background: var(--gray-300);
}

/* 品牌弹窗响应式 */
@media (max-width: 768px) {
    .brand-modal-body {
        padding: 36px 24px 32px;
    }

    .brand-modal-title {
        font-size: 24px;
    }

    .brand-modal-desc {
        font-size: 14px;
    }
}

/* === 应用场景 === */
.applications {
    background: var(--white);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.app-item {
    text-align: center;
    padding: 24px 12px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: default;
}

.app-item:hover {
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.05), rgba(200, 164, 78, 0.08));
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.app-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.app-item span {
    font-size: 14px;
    color: var(--gray-700);
    font-weight: 500;
}

/* 应用场景可点击样式 */
.app-item {
    cursor: pointer;
}

.app-item:hover {
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.05), rgba(200, 164, 78, 0.08));
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* === 应用场景详情弹窗 === */
.app-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 22, 40, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    padding: 24px;
}

.app-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.app-modal {
    background: var(--white);
    border-radius: 20px;
    max-width: 720px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
    transform: translateY(30px) scale(0.96);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.app-modal-overlay.active .app-modal {
    transform: translateY(0) scale(1);
}

.app-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.app-modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-900);
    border-color: var(--gray-300);
    transform: rotate(90deg);
}

.app-modal-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
    border-radius: 20px 20px 0 0;
    background: var(--gray-100);
}

.app-modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-modal-body {
    padding: 32px 36px 36px;
    text-align: center;
}

.app-modal-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 50px;
    color: var(--gold-dark);
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 14px;
}

.app-modal-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.app-modal-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.9;
    margin-bottom: 24px;
    text-align: left;
}

.app-modal-highlights {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.app-modal-highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    text-align: left;
    transition: var(--transition);
}

.app-modal-highlight-item:hover {
    border-color: var(--gold);
    background: rgba(200, 164, 78, 0.03);
}

.app-modal-highlight-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--gold);
    margin-top: 1px;
}

.app-modal-highlight-item span {
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.6;
}

.app-modal-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.app-modal-features span {
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.03), rgba(200, 164, 78, 0.05));
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 13px;
    color: var(--gray-700);
    font-weight: 500;
}

.app-modal::-webkit-scrollbar {
    width: 6px;
}

.app-modal::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 0 20px 20px 0;
}

.app-modal::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 3px;
}

.app-modal::-webkit-scrollbar-thumb:hover {
    background: var(--gray-300);
}

/* 应用场景弹窗响应式 */
@media (max-width: 768px) {
    .app-modal-image {
        height: 180px;
    }

    .app-modal-body {
        padding: 24px 20px 28px;
    }

    .app-modal-title {
        font-size: 22px;
    }

    .app-modal-desc {
        font-size: 14px;
    }
}

/* === 关于我们 === */
/* === 关于我们 - 企业文化与企业背景 === */
.about {
    position: relative;
    overflow: hidden;
    background: var(--gray-50);
}

/* 商务合作背景图（虚化） */
.about-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.about-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 40%;
    /* 强虚化 + 高亮度确保文字清晰可读 */
    filter: blur(12px) brightness(0.9) saturate(0.5);
    transform: scale(1.08);
}

/* 白色渐变遮罩 - 中央留白确保文字可读性 */
.about-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: linear-gradient(
        180deg,
        rgba(248, 249, 251, 0.92) 0%,
        rgba(248, 249, 251, 0.78) 30%,
        rgba(248, 249, 251, 0.72) 50%,
        rgba(248, 249, 251, 0.78) 70%,
        rgba(248, 249, 251, 0.92) 100%
    );
}

/* 内容层置顶 */
.about-content-wrapper {
    position: relative;
    z-index: 2;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-block {
    margin-bottom: 32px;
}

.about-block h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--blue-mid);
    margin-bottom: 12px;
    padding-left: 16px;
    border-left: 3px solid var(--gold);
}

.about-block p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.9;
    text-align: justify;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    position: sticky;
    top: 100px;
}

.stat-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.stat-item:hover {
    border-color: var(--gold);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--gold-dark);
    margin-bottom: 6px;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-400);
    letter-spacing: 1px;
}

/* === 产品服务 === */
.products {
    background: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-image {
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f0f2f5, #e8ecf1);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(10, 22, 40, 0.05), transparent);
    pointer-events: none;
    z-index: 1;
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.product-info p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-tags span {
    padding: 4px 12px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 4px;
    font-size: 12px;
    color: var(--gold-dark);
}

/* === 海外业务 === */
.overseas-section {
    margin-top: 80px;
    padding-top: 64px;
    border-top: 1px solid var(--gray-200);
}

.overseas-header {
    text-align: center;
    margin-bottom: 48px;
}

.overseas-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 16px 0 8px;
}

.overseas-header p {
    color: var(--gray-500);
    font-size: 16px;
}

.overseas-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.overseas-text p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.9;
    margin-bottom: 16px;
}

.overseas-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 28px;
}

.of-item {
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.of-item:hover {
    border-color: var(--gold);
    background: rgba(200, 164, 78, 0.03);
}

.of-icon {
    font-size: 28px;
    display: block;
    margin-bottom: 8px;
}

.of-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.of-item p {
    font-size: 13px;
    color: var(--gray-400);
    margin: 0;
}

.overseas-map {
    position: relative;
    width: 100%;
    min-height: 380px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.3);
}

/* 世界地图虚化背景 */
.overseas-map-bg {
    position: absolute;
    inset: -20px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(8px) brightness(1.05) saturate(0.6);
    opacity: 0.55;
    z-index: 0;
    pointer-events: none;
}

/* 半透明遮罩层 */
.overseas-map-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.7) 0%,
        rgba(250, 248, 243, 0.6) 50%,
        rgba(255, 255, 255, 0.7) 100%
    );
    z-index: 1;
    pointer-events: none;
}

.map-visual {
    position: relative;
    width: 100%;
    max-width: 550px;
    z-index: 2;
    aspect-ratio: 5/3;
}

/* SVG 路线图层 */
.map-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* 路线线条动画 */
.route-lines path {
    stroke-dasharray: 6, 4;
    animation: route-flow 3s linear infinite;
}

.route-lines path:nth-child(1) { animation-delay: 0s; }
.route-lines path:nth-child(2) { animation-delay: 0.6s; }
.route-lines path:nth-child(3) { animation-delay: 1.2s; }
.route-lines path:nth-child(4) { animation-delay: 1.8s; }

@keyframes route-flow {
    0% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -20; }
}

.map-point {
    position: absolute;
    font-size: 11px;
    color: var(--gold);
    font-weight: 600;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 3;
    animation: map-pulse 2s ease-in-out infinite;
    text-align: center;
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.8);
}

.map-point::before {
    content: '';
    display: block;
    width: 7px;
    height: 7px;
    background: var(--gold);
    border-radius: 50%;
    margin: 0 auto 4px;
    box-shadow: 0 0 12px rgba(200, 164, 78, 0.6);
}

@keyframes map-pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* === 质量保证 === */
.quality {
    background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid));
    color: var(--white);
}

.quality .section-header h2 {
    color: var(--white);
}

.quality .section-header p {
    color: rgba(255, 255, 255, 0.6);
}

.quality .section-tag {
    background: rgba(200, 164, 78, 0.1);
    border-color: rgba(200, 164, 78, 0.3);
    color: var(--gold-light);
}

.quality-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.q-step {
    text-align: center;
    flex: 1;
    max-width: 220px;
}

.q-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border: 2px solid var(--gold);
    border-radius: 50%;
    font-size: 20px;
    font-weight: 700;
    color: var(--gold);
    margin-bottom: 16px;
    transition: var(--transition);
}

.q-step:hover .q-number {
    background: var(--gold);
    color: var(--blue-dark);
}

.q-step h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.q-step p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.q-arrow {
    font-size: 28px;
    color: var(--gold);
    padding: 0 8px;
    opacity: 0.5;
}

/* === 联系我们 === */
.contact {
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
}

.contact-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 36px;
    text-align: center;
    transition: var(--transition);
}

.contact-card.highlight {
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.02), rgba(200, 164, 78, 0.04));
}

.contact-card:hover {
    border-color: var(--gold);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.contact-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue-mid), var(--blue-light));
    color: var(--gold);
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    border: 2px solid var(--gold);
}

.contact-card h3 {
    font-size: 16px;
    color: var(--gray-500);
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--blue-light);
}

.contact-info-item a {
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-light);
    transition: var(--transition);
}

.contact-info-item a:hover {
    color: var(--gold-dark);
}

.contact-location {
    margin-top: 32px;
    display: flex;
    justify-content: center;
}

.location-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 36px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    color: var(--gray-700);
}

.location-card h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.location-card p {
    font-size: 14px;
    color: var(--gray-500);
}

/* === 页脚 === */
.footer {
    background: var(--blue-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo .logo-icon {
    font-size: 28px;
}

.footer-logo span {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-contact p {
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* === 动画 === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === 产品卡片点击交互 === */
.product-card {
    cursor: pointer;
}

.product-card::after {
    content: '点击了解详情';
    position: absolute;
    bottom: 12px;
    right: 16px;
    font-size: 12px;
    color: var(--gold);
    opacity: 0;
    transform: translateX(10px);
    transition: var(--transition);
    font-weight: 500;
    letter-spacing: 1px;
    z-index: 2;
}

.product-card:hover::after {
    opacity: 1;
    transform: translateX(0);
}

/* === 产品详情弹窗 === */
.product-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 22, 40, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    padding: 24px;
}

.product-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.product-modal {
    background: var(--white);
    border-radius: 20px;
    max-width: 820px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
    transform: translateY(30px) scale(0.96);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.product-modal-overlay.active .product-modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-900);
    border-color: var(--gray-300);
    transform: rotate(90deg);
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.modal-image {
    height: 100%;
    min-height: 400px;
    background: linear-gradient(135deg, #f0f2f5, #e8ecf1);
    border-radius: 20px 0 0 20px;
    overflow: hidden;
}

.modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.modal-content {
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 50px;
    color: var(--gold-dark);
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 16px;
    width: fit-content;
}

.modal-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
    line-height: 1.3;
    letter-spacing: 0.5px;
}

.modal-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.9;
    margin-bottom: 24px;
}

.modal-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.modal-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.modal-feature-item:hover {
    border-color: var(--gold);
    background: rgba(200, 164, 78, 0.03);
}

.modal-feature-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--gold);
    margin-top: 1px;
}

.modal-feature-item span {
    font-size: 14px;
    color: var(--gray-700);
    line-height: 1.6;
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.modal-tags span {
    padding: 6px 14px;
    background: rgba(200, 164, 78, 0.08);
    border: 1px solid rgba(200, 164, 78, 0.2);
    border-radius: 4px;
    font-size: 12px;
    color: var(--gold-dark);
    font-weight: 500;
}

/* 弹窗滚动条美化 */
.product-modal::-webkit-scrollbar {
    width: 6px;
}

.product-modal::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 0 20px 20px 0;
}

.product-modal::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 3px;
}

.product-modal::-webkit-scrollbar-thumb:hover {
    background: var(--gray-300);
}

/* 弹窗响应式 */
@media (max-width: 768px) {
    .modal-body {
        grid-template-columns: 1fr;
    }

    .modal-image {
        min-height: 220px;
        max-height: 260px;
        border-radius: 20px 20px 0 0;
    }

    .modal-content {
        padding: 28px 24px;
    }

    .modal-title {
        font-size: 22px;
    }

    .modal-desc {
        font-size: 14px;
    }
}

/* === 响应式 === */
@media (max-width: 1024px) {
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .app-grid { grid-template-columns: repeat(4, 1fr); }
    .about-content { grid-template-columns: 1fr; }
    .about-stats { position: static; grid-template-columns: repeat(4, 1fr); }
    .overseas-content { grid-template-columns: 1fr; }
    .quality-steps { flex-wrap: wrap; gap: 24px; }
    .q-arrow { display: none; }
    .q-step { max-width: 45%; }
    .footer-content { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .hero-content h2 { font-size: 32px; }
    .hero-subtitle { font-size: 16px; }
    .section-header h2 { font-size: 28px; }
    .business-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .brand-categories { grid-template-columns: 1fr; }
    .app-grid { grid-template-columns: repeat(3, 1fr); }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
    .overseas-features { grid-template-columns: 1fr; }
    .overseas-map { min-height: 280px; }
    .map-visual { max-width: 400px; }
    .map-point { font-size: 10px; }
    .map-point::before { width: 6px; height: 6px; }

    .nav ul {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 22, 40, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid rgba(200, 164, 78, 0.2);
    }

    .nav ul.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav a {
        display: block;
        padding: 14px 20px;
    }

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

    .lang-switch {
        margin-left: 8px;
        padding: 3px;
    }

    .lang-btn {
        padding: 5px 10px;
        font-size: 12px;
    }

    .lang-btn span:not(.lang-flag) {
        display: none;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    section { padding: 60px 0; }
}