/* Base Reset & Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    scroll-behavior: smooth;
}

body {
    color: #1A1A2E;
    line-height: 1.7;
    background-color: #F8F9FA;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.container {
    width: 100%;
    padding: 0 1.5rem;
    margin: 0 auto;
}

/* Responsive Breakpoints */
@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}
@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #25D366;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #128C7E;
}

/* Animation Keyframes */
@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    0% {
        opacity: 0;
        transform: translateX(-50px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes rotateIn {
    0% {
        opacity: 0;
        transform: rotate(-10deg) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

@keyframes numberCount {
    0% {
        content: "0";
    }
    100% {
        content: attr(data-number);
    }
}

/* Animation Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-right {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.animate-fade-right.animated {
    opacity: 1;
    transform: translateX(0);
}

.pulse-effect {
    animation: pulse 3s infinite ease-in-out;
}

/* Header/Navigation with Scroll Animation */
.header {
    background-color: transparent;
    padding: 1.5rem 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
    transition: all 0.5s ease;
}

.header.scrolled {
    background-color: #FFFFFF;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: #FFFFFF;
    position: relative;
}

.header.scrolled .logo {
    color: #1A1A2E;
}

.logo span {
    background: linear-gradient(90deg, #25D366, #E63946);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, #25D366, #E63946);
    border-radius: 3px;
}

/* Mobile Menu */
.nav-menu-mobile {
    font-size: 1.5rem;
    color: #FFFFFF;
    cursor: pointer;
    z-index: 999;
}

.header.scrolled .nav-menu-mobile {
    color: #1A1A2E;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: #1A1A2E;
    z-index: 998;
    overflow: hidden;
    transition: height 0.5s ease;
}

.mobile-menu-overlay.active {
    height: 100vh;
}

.mobile-menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    list-style: none;
    text-align: center;
}

.mobile-menu li {
    margin: 2rem 0;
}

.mobile-menu a {
    font-size: 1.5rem;
    font-weight: 600;
    color: #FFFFFF;
    padding: 0.5rem 1rem;
    position: relative;
}

.mobile-menu a::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #25D366;
    transition: width 0.4s ease;
}

.mobile-menu a:hover::after {
    width: 100%;
}

/* Desktop Menu */
.nav-menu {
    display: none;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    color: #FFFFFF;
    font-weight: 500;
    font-size: 1rem;
    position: relative;
}

.header.scrolled .nav-menu a {
    color: #1A1A2E;
}

.nav-menu a::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #25D366;
    transition: width 0.4s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

@media (min-width: 992px) {
    .nav-menu {
        display: flex;
    }
    .nav-menu-mobile {
        display: none;
    }
}

/* Hero Section (通用) */
.hero {
    height: 80vh;
    background: linear-gradient(
        rgba(10, 18, 40, 0.85), 
        rgba(10, 18, 40, 0.9)
    );
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 30%, rgba(37, 211, 102, 0.1), transparent 70%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1.2s ease-out;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero h1 span {
    background: linear-gradient(90deg, #25D366, #4CC9F0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 750px;
    margin: 0 auto 2.5rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-whatsapp {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
}

.btn-whatsapp:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(37, 211, 102, 0.3);
}

.btn-email {
    background: linear-gradient(90deg, #0078FF, #0056b3);
    color: #FFFFFF;
}

.btn-email:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 120, 255, 0.3);
}

.btn-primary {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    display: inline-block;
}

@media (min-width: 768px) {
    .cta-buttons {
        flex-direction: row;
        justify-content: center;
        gap: 2rem;
    }
    .hero h1 {
        font-size: 4.5rem;
    }
}

/* Section Title Styling (通用) */
.section {
    padding: 8rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 5rem;
    position: relative;
}

.section-title h2 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #1A1A2E;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #E63946);
    border-radius: 4px;
}

.section-title p {
    font-size: 1.1rem;
    color: #6C757D;
    max-width: 700px;
    margin: 0 auto;
}

/* 首页 - 工厂展示区 */
.gallery {
    background-color: #FFFFFF;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.gallery-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    position: relative;
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.gallery-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 18, 40, 0.4);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 2;
}

.gallery-item:hover {
    transform: translateY(-10px) rotate(1deg);
    box-shadow: 0 25px 40px rgba(0, 0, 0, 0.15);
}

.gallery-item:hover::before {
    opacity: 1;
}

.gallery-item img, .gallery-item video {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.gallery-item:hover img, .gallery-item:hover video {
    transform: scale(1.1);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    color: #FFFFFF;
    z-index: 3;
    transform: translateY(30px);
    opacity: 0;
    transition: all 0.5s ease;
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
    opacity: 1;
}

.gallery-caption h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.gallery-caption p {
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 首页 - 产能展示区 */
.capacity {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
}

.capacity-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.capacity-card {
    background: #FFFFFF;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.capacity-card::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.1), transparent);
    border-radius: 0 0 0 100px;
    z-index: 1;
}

.capacity-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1A1A2E;
    margin-bottom: 2rem;
    position: relative;
    z-index: 2;
}

.capacity-card h3 span {
    color: #25D366;
}

.capacity-list {
    list-style: none;
    position: relative;
    z-index: 2;
}

.capacity-list li {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: flex-start;
    font-size: 1.05rem;
}

.capacity-list li::before {
    content: "✓";
    color: #25D366;
    font-weight: 800;
    margin-right: 1rem;
    font-size: 1.3rem;
    background: rgba(37, 211, 102, 0.1);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* 首页 - 数据统计区 */
.stats {
    background: linear-gradient(90deg, #1A1A2E, #16213E);
    color: #FFFFFF;
    padding: 6rem 0;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat-item {
    padding: 2rem 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: #25D366;
    margin-bottom: 0.5rem;
    position: relative;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (min-width: 992px) {
    .capacity-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 首页 - 信任背书区 (3D翻转卡片) */
.trust {
    background-color: #FFFFFF;
}

.trust-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.trust-card {
    perspective: 1000px;
    height: 400px;
}

.trust-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-radius: 20px;
}

.trust-card:hover .trust-card-inner {
    transform: rotateY(180deg);
}

.trust-card-front, .trust-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.trust-card-front {
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F9FA 100%);
}

.trust-card-back {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
    color: #FFFFFF;
    transform: rotateY(180deg);
}

.trust-icon {
    font-size: 4rem;
    background: linear-gradient(90deg, #25D366, #E63946);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1.5rem;
}

.trust-card-front h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1A1A2E;
}

.trust-card-front p {
    color: #6C757D;
    font-size: 1rem;
}

.trust-card-back h4 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
}

.trust-card-back ul {
    list-style: none;
    text-align: left;
}

.trust-card-back li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.trust-card-back li::before {
    content: "•";
    color: #25D366;
    font-size: 1.5rem;
    margin-right: 0.8rem;
}

@media (min-width: 768px) {
    .trust-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 首页 - AI聊天区 */
.ai-chat {
    background: linear-gradient(135deg, #E9ECEF 0%, #F8F9FA 100%);
    padding: 8rem 0;
}

.chat-box {
    background: #FFFFFF;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    max-width: 700px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

.chat-header {
    background: linear-gradient(90deg, #1A1A2E, #16213E);
    color: #FFFFFF;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #25D366;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
}

.chat-messages {
    padding: 1.5rem;
    height: 300px;
    overflow-y: auto;
    background: #F8F9FA;
}

.message-bot {
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
}

.message-bot .message-content {
    background: #FFFFFF;
    padding: 1rem 1.5rem;
    border-radius: 20px 20px 20px 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    max-width: 80%;
}

.message-user {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.message-user .message-content {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    padding: 1rem 1.5rem;
    border-radius: 20px 20px 5px 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    max-width: 80%;
}

.chat-input-wrapper {
    padding: 1.5rem;
    background: #FFFFFF;
    border-top: 1px solid #E9ECEF;
}

.chat-input {
    display: flex;
    gap: 1rem;
}

.chat-input input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 1px solid #E9ECEF;
    border-radius: 50px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.chat-input input:focus {
    outline: none;
    border-color: #25D366;
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.chat-input button {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.chat-input button:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(37, 211, 102, 0.2);
}

/* 产品页 - 筛选栏 */
.product-filter {
    background: #FFFFFF;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    margin-bottom: 4rem;
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #1A1A2E;
}

.filter-group select, .filter-group input {
    width: 100%;
    padding: 0.8rem 1.2rem;
    border: 1px solid #E9ECEF;
    border-radius: 10px;
    font-size: 1rem;
    background: #F8F9FA;
    transition: all 0.3s ease;
}

.filter-group select:focus, .filter-group input:focus {
    outline: none;
    border-color: #25D366;
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.filter-btn {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.filter-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
}

/* 产品页 - 产品卡片 */
.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.product-card {
    background: #FFFFFF;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
}

.product-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 40px rgba(0, 0, 0, 0.15);
}

.product-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: #E63946;
    color: #FFFFFF;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 2;
}

.product-img {
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.1);
}

.product-content {
    padding: 2rem;
}

.product-category {
    font-size: 0.9rem;
    color: #6C757D;
    font-weight: 500;
    margin-bottom: 0.8rem;
}

.product-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1A1A2E;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.product-desc {
    color: #6C757D;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: #25D366;
    margin-bottom: 1.5rem;
}

.product-price span {
    font-size: 1rem;
    font-weight: 500;
    color: #6C757D;
    text-decoration: line-through;
    margin-left: 0.8rem;
}

.product-action {
    display: flex;
    gap: 1rem;
}

.product-btn {
    flex: 1;
    padding: 1rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-view {
    background: #F8F9FA;
    color: #1A1A2E;
}

.btn-view:hover {
    background: #E9ECEF;
}

.btn-inquire {
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
}

.btn-inquire:hover {
    box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
}

@media (min-width: 768px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 关于我们页 - 公司介绍 */
.about-intro {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: center;
}

.about-img {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #1A1A2E;
}

.about-text p {
    font-size: 1.1rem;
    color: #6C757D;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #25D366;
    flex-shrink: 0;
}

.feature-text h4 {
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #1A1A2E;
}

.feature-text p {
    font-size: 0.95rem;
    color: #6C757D;
}

@media (min-width: 992px) {
    .about-intro {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 关于我们页 - 时间轴 */
.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: #25D366;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 6px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    box-sizing: border-box;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    background-color: #25D366;
    border: 4px solid #FFFFFF;
    border-radius: 50%;
    top: 20px;
    z-index: 1;
}

.timeline-left {
    left: 0;
}

.timeline-right {
    left: 50%;
}

.timeline-left::after {
    right: -17px;
}

.timeline-right::after {
    left: -17px;
}

.timeline-content {
    padding: 2rem;
    background-color: white;
    position: relative;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.timeline-date {
    font-weight: 700;
    color: #25D366;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.timeline-content h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1A1A2E;
}

.timeline-content p {
    color: #6C757D;
    line-height: 1.7;
}

@media screen and (max-width: 992px) {
    .timeline::after {
        left: 31px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .timeline-item::after {
        left: 15px;
    }
    
    .timeline-left::after, .timeline-right::after {
        left: 15px;
    }
    
    .timeline-right {
        left: 0%;
    }
}

/* 关于我们页 - 团队展示 */
.team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.team-card {
    background: #FFFFFF;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
    text-align: center;
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 40px rgba(0, 0, 0, 0.15);
}

.team-img {
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.team-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.team-card:hover .team-img img {
    transform: scale(1.1);
}

.team-info {
    padding: 2rem;
}

.team-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1A1A2E;
    margin-bottom: 0.5rem;
}

.team-position {
    color: #25D366;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.team-desc {
    color: #6C757D;
    margin-bottom: 1.5rem;
}

.team-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.team-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #F8F9FA;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1A1A2E;
    transition: all 0.3s ease;
}

.team-social a:hover {
    background: #25D366;
    color: #FFFFFF;
    transform: translateY(-3px);
}

@media (min-width: 768px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .team-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 联系页 - 联系信息+表单+地图 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

.contact-map {
    width: 100%;
    height: 400px;
    background: #E9ECEF;
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.contact-map-placeholder {
    text-align: center;
    color: #6C757D;
}

.contact-map-placeholder i {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: #25D366;
}

.contact-details {
    background: #FFFFFF;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.contact-info-list {
    margin-bottom: 3rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-info-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #25D366;
    flex-shrink: 0;
}

.contact-info-text h4 {
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #1A1A2E;
}

.contact-info-text p, .contact-info-text a {
    color: #6C757D;
    font-size: 1.05rem;
}

.contact-info-text a:hover {
    color: #25D366;
}

.contact-form {
    background: #FFFFFF;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.contact-form h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #1A1A2E;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #1A1A2E;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1.2rem 1.5rem;
    border: 1px solid #E9ECEF;
    border-radius: 10px;
    font-size: 1rem;
    background: #F8F9FA;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: #25D366;
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s ease;
}

.submit-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(37, 211, 102, 0.2);
}

/* 联系页 - FAQ区域 */
.faq-section {
    background: #FFFFFF;
    padding: 6rem 0;
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1.5rem;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.faq-question {
    background: #F8F9FA;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: #1A1A2E;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #E9ECEF;
}

.faq-question i {
    color: #25D366;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
    background: #FFFFFF;
}

.faq-answer p {
    padding: 1.5rem 0;
    color: #6C757D;
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 2rem 2rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

@media (min-width: 992px) {
    .contact-wrapper {
        grid-template-columns: 1fr 1.5fr;
    }
}

/* 通用联系区 (首页+其他页) */
.contact {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
    color: #FFFFFF;
    padding: 8rem 0;
}

.contact .section-title h2 {
    color: #FFFFFF;
}

.contact .section-title h2::after {
    background: linear-gradient(90deg, #25D366, #4CC9F0);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

.contact-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 3rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.contact-info h3::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #25D366, #4CC9F0);
    border-radius: 3px;
}

.contact-item {
    margin-bottom: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #25D366;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-details p, .contact-details a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.05rem;
}

.contact-details a:hover {
    color: #25D366;
    text-decoration: underline;
}

@media (min-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Footer (通用) */
.footer {
    background: #0F172A;
    color: #FFFFFF;
    padding: 6rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: #25D366;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 1rem;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
}

.footer-col ul li a:hover {
    color: #25D366;
    padding-left: 10px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #25D366;
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Back to Top Button (通用) */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(90deg, #25D366, #128C7E);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}