/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --gold: #D4AF37;
    --gold-light: #F4E4BC;
    --gold-dark: #B8860B;
    --black: #0D0D0D;
    --black-light: #1A1A1A;
    --black-lighter: #2D2D2D;
    --gray: #888888;
    --white: #FFFFFF;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: var(--black);
    color: var(--white);
    line-height: 1.6;
    min-height: 100vh;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 13, 13, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-icon {
    color: var(--gold);
    font-size: 20px;
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--gold);
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 1px;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--gold);
}

.nav-links a i {
    font-size: 12px;
}

/* 首页横幅 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--black) 0%, var(--black-light) 50%, var(--black) 100%);
    padding: 80px 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.hero-title {
    margin-bottom: 30px;
}

.title-small {
    display: block;
    font-size: 16px;
    color: var(--gold);
    letter-spacing: 4px;
    margin-bottom: 16px;
}

.title-main {
    display: block;
    font-size: 42px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 50%, var(--gold-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
}

.hero-desc {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 14px;
    letter-spacing: 2px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
    color: var(--black);
    font-weight: bold;
    border-radius: 4px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.3);
}

/* 通用区块 */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
    margin: 20px auto 0;
}

/* 关于我们 */
.about {
    background: var(--black-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 24px;
    color: var(--gold);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: var(--gold);
}

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

.about-features {
    display: grid;
    gap: 20px;
}

.feature-item {
    background: var(--black);
    padding: 24px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    border-left: 3px solid var(--gold);
    transition: all 0.3s;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-item:hover {
    border-left-color: var(--gold);
    transform: translateX(4px);
}

.feature-icon {
    font-size: 20px;
    color: var(--gold);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item h4 {
    font-size: 16px;
    color: var(--gold);
    margin-bottom: 8px;
}

.feature-item p {
    color: var(--gray);
    font-size: 13px;
    line-height: 1.6;
}

/* 业务范围 */
.services {
    background: var(--black);
}

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

.service-card {
    background: var(--black-light);
    padding: 32px 24px;
    text-align: center;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: all 0.3s;
}

.service-card:hover {
    border-color: var(--gold);
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.service-icon {
    font-size: 32px;
    color: var(--gold);
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 16px;
    color: var(--gold);
    margin-bottom: 16px;
}

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

.service-card li {
    padding: 8px 0;
    color: var(--gray);
    font-size: 13px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.service-card li:last-child {
    border-bottom: none;
}

/* 成功案例 */
.cases {
    background: var(--black-light);
}

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

.case-card {
    background: var(--black);
    padding: 28px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: all 0.3s;
}

.case-card:hover {
    border-color: var(--gold);
}

.case-icon {
    font-size: 28px;
    color: var(--gold);
    margin-bottom: 16px;
}

.case-card h3 {
    font-size: 16px;
    color: var(--gold);
    margin-bottom: 12px;
}

.case-card p {
    color: var(--gray);
    font-size: 13px;
    line-height: 1.7;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 16px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--black-light);
    border: 1px solid rgba(212, 175, 55, 0.2);
    color: var(--gold);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 14px;
    color: var(--gold);
    margin-bottom: 6px;
}

.contact-item p {
    color: var(--gray);
    font-size: 14px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--black-light);
    border: 1px solid rgba(212, 175, 55, 0.2);
    color: var(--white);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
    border-radius: 4px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--gold);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--gray);
}

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

.contact-form .btn {
    width: auto;
    align-self: flex-start;
    margin-top: 8px;
}

/* 页脚 */
.footer {
    background: var(--black-light);
    padding: 24px 0;
    text-align: center;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer p {
    color: var(--gray);
    font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .navbar {
        height: auto;
    }
    
    .navbar .container {
        flex-direction: column;
        height: auto;
        padding: 12px 16px;
        gap: 10px;
    }
    
    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-links a {
        font-size: 13px;
    }
    
    .nav-links a span,
    .nav-links a i {
        display: none;
    }
    
    .nav-links a::before {
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        content: attr(data-icon);
        font-size: 18px;
        display: inline-block;
    }
    
    .nav-links a[data-icon="home"]::before { content: "\f015"; }
    .nav-links a[data-icon="users"]::before { content: "\f0c0"; }
    .nav-links a[data-icon="grip"]::before { content: "\f009"; }
    .nav-links a[data-icon="briefcase"]::before { content: "\f0b1"; }
    .nav-links a[data-icon="envelope"]::before { content: "\f0e0"; }
    
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }
    
    .hero-title {
        margin-bottom: 20px;
    }
    
    .title-small {
        font-size: 14px;
        letter-spacing: 2px;
        margin-bottom: 12px;
    }
    
    .title-main {
        font-size: 24px;
        letter-spacing: 2px;
    }
    
    .hero-desc {
        font-size: 14px;
        padding: 0 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 24px;
        margin-bottom: 40px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        flex-wrap: wrap;
        gap: 24px;
        justify-content: center;
    }
    
    .about-stats .stat-item {
        flex: 0 0 calc(33.33% - 16px);
    }
    
    .about-features {
        gap: 16px;
    }
    
    .feature-item {
        padding: 20px;
        gap: 12px;
    }
    
    .services-grid,
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .service-card,
    .case-card {
        padding: 24px 20px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        gap: 20px;
    }
    
    .contact-form {
        gap: 14px;
    }
    
    .contact-form .btn {
        width: 100%;
    }
    
    .footer {
        padding: 20px 0;
    }
}