/* ==========================================
   江苏装修 - 纽约装修公司网站样式
   ========================================== */

:root {
    --primary-color: #FF6B35;      /* 橙色 - 活力、专业 */
    --secondary-color: #004E89;    /* 深蓝 - 信任、稳重 */
    --accent-color: #F7B801;       /* 金黄 - 高品质 */
    --dark-gray: #2C3E50;
    --light-gray: #ECF0F1;
    --white: #FFFFFF;
    --text-color: #333333;
    --border-color: #DDDDDD;
    --success-color: #27AE60;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

/* ==========================================
   导航栏
   ========================================== */
header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #003666 100%);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    color: var(--white);
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
    transition: opacity 0.3s;
    display: flex;
    align-items: center;
}

.logo a:hover {
    opacity: 0.9;
}

.logo-icon {
    font-size: 2rem;
    margin-right: 0.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
    background-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================
   Hero Section / Banner
   ========================================== */
.hero {
    background: linear-gradient(135deg, rgba(0, 78, 137, 0.9) 0%, rgba(255, 107, 53, 0.8) 100%),
                url('images/hero-bg.jpg') center/cover no-repeat;
    color: var(--white);
    text-align: center;
    padding: 6rem 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.badge {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.badge-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: var(--shadow);
    margin-top: 1rem;
}

.cta-button:hover {
    background-color: #E55A2B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* ==========================================
   主要内容区域
   ========================================== */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.page-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.page-subtitle {
    text-align: center;
    color: #666;
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

section {
    margin-bottom: 4rem;
}

h2 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--primary-color);
    display: inline-block;
}

h3 {
    font-size: 1.5rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

/* ==========================================
   服务项目卡片
   ========================================== */
.services-grid,
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-card,
.project-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.service-card:hover,
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-icon,
.project-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card h3,
.project-card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.service-card ul {
    list-style: none;
    margin-top: 1rem;
}

.service-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ==========================================
   关于我们 / 公司优势
   ========================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin: 2rem 0;
}

.about-text {
    line-height: 1.8;
}

.about-image {
    border-radius: 10px;
    box-shadow: var(--shadow);
    width: 100%;
    height: auto;
}

.advantages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.advantage-item {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
}

.advantage-item h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* ==========================================
   FAQ / 问答区域
   ========================================== */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    background-color: var(--light-gray);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--secondary-color);
    transition: background-color 0.3s;
}

.faq-question:hover {
    background-color: #E0E6E8;
}

.faq-question.active {
    background-color: var(--secondary-color);
    color: var(--white);
}

.faq-toggle {
    font-size: 1.5rem;
    transition: transform 0.3s;
}

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

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-out;
}

.faq-answer.active {
    padding: 1.5rem;
    max-height: 500px;
}

/* ==========================================
   联系表单
   ========================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #003666 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: 10px;
}

.contact-info h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-icon {
    font-size: 1.5rem;
    margin-right: 1rem;
    color: var(--accent-color);
}

.contact-item a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-item a:hover {
    color: var(--accent-color);
}

.contact-form {
    background-color: var(--white);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.submit-button {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.submit-button:hover {
    background-color: #E55A2B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* ==========================================
   页脚
   ========================================== */
footer {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: 3rem 2rem 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--light-gray);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4A5568;
    color: var(--light-gray);
}

.footer-bottom a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: var(--secondary-color);
        width: 100%;
        padding: 2rem;
        gap: 1rem;
        transition: left 0.3s;
    }

    .nav-links.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 2rem;
    }

    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 1rem;
    }

    .logo a {
        font-size: 1.4rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    main {
        padding: 2rem 1rem;
    }
}

/* ==========================================
   实用工具类
   ========================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.success-message {
    background-color: var(--success-color);
    color: var(--white);
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    display: none;
}

.error-message {
    background-color: #E74C3C;
    color: var(--white);
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    display: none;
}