/* ========================================
   雅彩艺术漆 - 加盟代理网站模板
   样式表 v1.0
   ======================================== */

/* CSS 变量 */
:root {
    --primary: #b89a7a;
    --primary-dark: #9a7a5a;
    --primary-light: #d4b896;
    --secondary: #654c3a;
    --accent: #c9a87c;
    --bg-light: #faf7f2;
    --bg-white: #ffffff;
    --text-dark: #2d2418;
    --text-muted: #7a6b5a;
    --text-light: #a09080;
    --border: #e8e0d6;
    --shadow: 0 8px 30px rgba(101, 76, 58, 0.1);
    --shadow-hover: 0 16px 48px rgba(101, 76, 58, 0.18);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
    font-family: var(--font);
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul { list-style: none; }

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

/* 通用按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
}

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(184, 154, 122, 0.35);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-phone {
    background: var(--secondary);
    color: white;
    padding: 10px 20px;
    font-size: 0.9rem;
}
.btn-phone:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

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

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(184, 154, 122, 0.15);
    color: var(--primary-dark);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(250, 247, 242, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(250, 247, 242, 0.95);
    border-bottom-color: var(--border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--secondary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.logo-text {
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary);
    background: rgba(184, 154, 122, 0.1);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--secondary);
    border-radius: 4px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #f0e6d3 0%, #e8d5b7 40%, #d4b896 100%);
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-text .hero-badge {
    display: inline-block;
    background: rgba(101, 76, 58, 0.15);
    color: var(--secondary);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}

.hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--secondary);
    margin-bottom: 20px;
}

.hero-text .highlight {
    color: var(--primary-dark);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--secondary);
    line-height: 1;
}

.stat-plus, .stat-percent {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Hero 右侧卡片 */
.hero-visual {
    display: grid;
    gap: 20px;
}

.hero-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 24px 28px;
    box-shadow: 0 8px 32px rgba(101,76,58,0.08);
    border: 1px solid rgba(255,255,255,0.5);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.hero-card i {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 4px;
}

.hero-card h3 {
    font-size: 1.2rem;
    color: var(--secondary);
}

.hero-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.card-2 { margin-left: 40px; }
.card-3 { margin-left: 80px; }

/* ========== About ========== */
.about {
    background: var(--bg-white);
}

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

.about-image {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

.about-text h3 {
    font-size: 1.8rem;
    color: var(--secondary);
    margin-bottom: 16px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.about-features li i {
    color: var(--primary);
    font-size: 1rem;
}

/* ========== Products ========== */
.products {
    background: var(--bg-light);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.product-img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255,255,255,0.9);
}

.product-info {
    padding: 20px 24px 24px;
    position: relative;
}

.product-info h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--secondary);
}

.product-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.product-tag {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ========== Cases ========== */
.cases {
    background: var(--bg-white);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.case-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.case-img {
    height: 300px;
    position: relative;
    display: flex;
    align-items: flex-end;
}

.case-overlay {
    padding: 24px;
    background: linear-gradient(transparent, rgba(45,36,24,0.8));
    color: white;
    width: 100%;
}

.case-overlay span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.case-overlay h4 {
    font-size: 1.15rem;
    margin: 4px 0;
}

.case-overlay p {
    font-size: 0.85rem;
    opacity: 0.9;
}

/* ========== Advantages ========== */
.advantages {
    background: var(--bg-light);
}

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

.advantage-item {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.adv-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: white;
    font-size: 1.5rem;
}

.advantage-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--secondary);
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ========== Process ========== */
.process {
    background: var(--bg-white);
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.step {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 32px 28px;
    text-align: center;
    flex: 1;
    min-width: 180px;
    max-width: 240px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0 auto 16px;
}

.step-content h3 {
    font-size: 1.1rem;
    color: var(--secondary);
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.step-arrow {
    color: var(--primary-light);
    font-size: 1.5rem;
}

/* ========== Contact ========== */
.contact {
    background: linear-gradient(135deg, #f0e6d3, #e8d5b7);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-tag {
    background: rgba(101, 76, 58, 0.2);
}

.contact-info h2 {
    font-size: 2rem;
    color: var(--secondary);
    margin: 12px 0 16px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.contact-list li i {
    width: 36px;
    height: 36px;
    background: var(--bg-white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.contact-list a:hover {
    color: var(--primary);
}

.contact-social {
    display: flex;
    gap: 12px;
}

.contact-social a {
    width: 44px;
    height: 44px;
    background: var(--bg-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary);
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.contact-social a:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

/* 表单 */
.contact-form {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    position: relative;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font);
    background: var(--bg-light);
    transition: var(--transition);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(184,154,122,0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-group .error-msg {
    font-size: 0.78rem;
    color: #e74c3c;
    margin-top: 4px;
    display: block;
}

.form-tip {
    grid-column: 1 / -1;
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
    margin-top: 8px;
}

/* ========== Footer ========== */
.footer {
    background: var(--secondary);
    color: rgba(255,255,255,0.85);
    padding: 60px 0 30px;
}

.footer .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-contact h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a,
.footer-contact p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.footer-bottom a {
    color: rgba(255,255,255,0.6);
}

.footer-bottom a:hover {
    color: var(--primary-light);
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(184,154,122,0.3);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(184,154,122,0.4);
}

/* ========== Responsive ========== */
/* 平板 */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text p {
        margin: 0 auto 36px;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-features {
        justify-items: center;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .process-steps {
        flex-direction: column;
    }

    .step {
        max-width: 100%;
        width: 100%;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .card-2, .card-3 {
        margin-left: 0;
    }
}

/* 手机 */
@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .navbar .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(250,247,242,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        transform: translateY(-120%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
    }

    .navbar .nav-menu.active {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 4px;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .hamburger {
        display: flex;
    }

    .btn-phone span {
        display: none;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .case-grid {
        grid-template-columns: 1fr;
    }

    .case-img {
        height: 220px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 24px;
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* 小手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

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

    .btn-lg {
        width: 100%;
    }

    .stat-number {
        font-size: 1.6rem;
    }
}