/* ====== CSS变量定义（蓝白简约主题） ====== */
:root {
    --primary-color: #165DFF;
    --primary-light: #4080FF;
    --primary-dark: #0E42D2;
    --secondary-color: #36CFC9;
    --secondary-light: #5CDBD3;
    --accent-color: #7B61FF;
    --bg-light: #F5F7FA;
    --bg-white: #FFFFFF;
    --text-dark: #1D2129;
    --text-medium: #4E5969;
    --text-light: #86909C;
    --border-color: #E5E6EB;
    --border-hover: #C9CDD4;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.25s ease;
    --gradient-primary: linear-gradient(135deg, #165DFF 0%, #4080FF 100%);
    --gradient-secondary: linear-gradient(135deg, #36CFC9 0%, #29B7B1 100%);
    --gradient-accent: linear-gradient(135deg, #7B61FF 0%, #8E79FF 100%);
}

/* ====== 全局重置与基础样式 ====== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.5;
    overflow-x: hidden;
    font-weight: 400;
}

/* ====== 导航栏样式 ====== */
#navigation {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar-brand {
    padding: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand span {
    font-size: 22px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 0.5px;
}

#nav > li > a {
    color: var(--text-medium) !important;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 16px !important;
    margin: 0 2px;
    border-radius: 6px;
    transition: var(--transition);
}

#nav > li > a:hover {
    background: var(--bg-light);
    color: var(--primary-color) !important;
}

/* ====== 布局样式 ====== */
main {
    padding-top: 70px;
}

section {
    padding: 70px 0;
}

.container {
    max-width: 1200px;
    padding: 0 20px;
    margin: 0 auto;
}

/* ====== 首页英雄区 ====== */
#home-slider {
    background: var(--bg-white);
    padding: 90px 0 70px;
    text-align: center;
    position: relative;
}

#home-slider::before,
#home-slider::after {
    display: none; /* 移除装饰性动画，更简约 */
}

.caption-content h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--primary-color);
    margin-bottom: 16px;
    font-weight: 600;
}

.caption-content h2 {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-medium);
    margin-bottom: 24px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.fun-badge {
    display: inline-block;
    background: rgba(22, 93, 255, 0.1);
    color: var(--primary-color);
    padding: 6px 20px;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid var(--primary-color);
}

.stats-fun {
    display: flex;
    justify-content: center;
    gap: clamp(16px, 4vw, 32px);
    margin: 32px 0;
    flex-wrap: wrap;
}

.stat-box {
    background: var(--bg-white);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    min-width: 140px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.stat-number {
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    font-weight: 600;
    color: var(--primary-color);
    display: block;
    line-height: 1;
}
.stat-text {
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    font-weight: 400;
    color: var(--text-light);
    display: block;
    line-height: 1.2;
    margin-top: 8px;
    text-align: center;
}
.stat-label {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 6px;
}

/* ====== 按钮样式 ====== */
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
    flex-wrap: wrap;
}

.btn-fun {
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-fun:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    color: white;
}

.btn-secondary-fun {
    background: var(--bg-white);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-secondary-fun:hover {
    background: rgba(22, 93, 255, 0.05);
    color: var(--primary-dark);
}

/* ====== 功能特点区 ====== */
#service {
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: var(--text-dark);
    margin-bottom: 12px;
    font-weight: 600;
}

.section-title p {
    color: var(--text-light);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.feature-icon i {
    color: var(--primary-color);
    font-size: 28px;
}

.feature-card h3 {
    font-size: 1.25rem;
    color: var(--text-dark);
    margin-bottom: 12px;
    font-weight: 500;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ====== 如何使用区 ====== */
#portfolio {
    background: var(--bg-light);
}

.steps-container {
    max-width: 800px;
    margin: 0 auto;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
    background: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--secondary-color);
}

.step-number {
    width: 48px;
    height: 48px;
    background: rgba(54, 207, 201, 0.1);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
    border: 1px solid var(--secondary-color);
}

.step-content h3 {
    font-size: 1.15rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 500;
}

.step-content p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ====== 功能列表区 ====== */
#testimonials {
    background: var(--bg-white);
}

.functions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.function-item {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.function-item:hover {
    border-color: var(--primary-color);
    background: rgba(22, 93, 255, 0.02);
}

.function-item i {
    color: var(--primary-color);
    font-size: 18px;
    width: 28px;
    height: 28px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.function-item span {
    color: var(--text-medium);
    font-size: 15px;
}

/* ====== 关于我们区 ====== */
#contact {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.about-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.about-card h3 {
    font-size: 1.25rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.about-card h3 i {
    color: var(--primary-color);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-line {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.contact-line:last-child {
    border-bottom: none;
}

.contact-line i {
    width: 32px;
    height: 32px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-line a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-line a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ====== 页脚 ====== */
#footer {
    background: var(--text-dark);
    color: var(--text-light);
    padding: 48px 0 24px;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 24px 0;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

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

.copyright {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid #2C3038;
    color: var(--text-light);
    font-size: 13px;
}

.copyright a {
    color: var(--primary-light);
    text-decoration: none;
}

/* ====== 弹窗样式 ====== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-box {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 760px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
    position: relative;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 20px;
    color: var(--text-light);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-light);
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(22, 93, 255, 0.1);
    color: var(--primary-color);
}

.modal-title {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.modal-content h3 {
    font-size: 1.15rem;
    color: var(--primary-color);
    margin: 16px 0 12px;
    padding-left: 12px;
    border-left: 3px solid var(--primary-color);
    font-weight: 500;
}

.modal-content p {
    margin-bottom: 12px;
    line-height: 1.6;
    color: var(--text-medium);
    font-size: 0.95rem;
}

.modal-content ul {
    margin: 8px 0 16px 20px;
    color: var(--text-medium);
}

.modal-content li {
    margin-bottom: 6px;
    line-height: 1.5;
    font-size: 0.95rem;
}

/* ====== 音乐按钮 ====== */
.btnAudio {
    width: 52px;
    height: 52px;
    background: var(--primary-color);
    border-radius: 50%;
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23ffffff"><path d="M12 2c-5.514 0-10 4.486-10 10s4.486 10 10 10 10-4.486 10-10-4.486-10-10-10zm0 18c-4.411 0-8-3.589-8-8s3.589-8 8-8 8 3.589 8 8-3.589 8-8 8zm-1-13h2v6h-2zm4 2h2v4h-2z"/></svg>');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 40%;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.2);
    transition: var(--transition);
}

.btnAudio:hover {
    transform: scale(1.05);
    background-color: var(--primary-dark);
    box-shadow: 0 6px 16px rgba(22, 93, 255, 0.3);
}

.rotate1circle {
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ====== 响应式优化 ====== */
@media (max-width: 992px) {
    .step-item { 
        flex-direction: column; 
        text-align: center; 
        gap: 16px; 
    }
    .step-number { 
        margin-bottom: 8px; 
    }
}

@media (max-width: 768px) {
    main { 
        padding-top: 64px; 
    }
    section { 
        padding: 56px 0; 
    }
    .cta-buttons { 
        flex-direction: column; 
        align-items: center; 
    }
    .btn-fun, .btn-secondary-fun { 
        width: 100%; 
        max-width: 280px; 
        justify-content: center; 
    }
    .modal-box { 
        padding: 24px; 
    }
}

@media (max-width: 576px) {
    section { 
        padding: 48px 0; 
    }
    .modal-box { 
        padding: 16px; 
    }
    .feature-card {
        padding: 20px;
    }
    .about-card {
        padding: 20px;
    }
}