/* 孟加拉国网站样式 - aipornvideos.wiki */
:root {
    --color-primary: #128C7E;      /* 绿松石色 - 孟加拉国风格 */
    --color-secondary: #075E54;    /* 深绿色 */
    --color-accent: #25D366;       /* 亮绿色 */
    --color-light: #E8F5E9;        /* 超浅绿色 */
    --color-dark: #1F2D3D;         /* 深蓝灰色 */
    --color-text: #2D3748;         /* 正文颜色 */
    --color-text-light: #718096;   /* 浅色文本 */
    --color-white: #FFFFFF;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --font-main: 'Hind Siliguri', 'Arial', sans-serif;
    --font-heading: 'Noto Sans Bengali', 'Arial', sans-serif;
    --transition: all 0.3s ease;
}

/* 基本重置与样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

/* 容器和布局 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

section {
    padding: 5rem 0;
}

/* 排版 */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
}

.section-title {
    text-align: center;
    position: relative;
    margin-bottom: 3rem;
    color: var(--color-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 3px;
    background: var(--color-primary);
}

/* 头部导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
}

.brand h1 {
    font-size: 1.5rem;
    margin-left: 0.75rem;
    color: var(--color-primary);
}

.logo {
    width: 40px;
    height: 40px;
}

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

.nav-menu {
    display: flex;
}

.nav-menu li {
    margin-left: 2rem;
}

.nav-menu a {
    color: var(--color-dark);
    font-weight: 500;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--color-primary);
}

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

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 100;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    margin: 5px 0;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 主页英雄区 */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background-color: var(--color-light);
    background-image: radial-gradient(var(--color-light) 0%, rgba(232, 245, 233, 0.7) 100%);
}

.hero-section .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    padding-right: 2rem;
}

.hero-visual {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.hero-desc {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero-cta {
    margin-bottom: 2rem;
}

.small-text {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-shape {
    max-width: 100%;
    height: auto;
}

/* 特性区块 */
.features-section {
    background: var(--color-white);
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    background: var(--color-light);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    margin: 0 auto 1.5rem;
}

/* 工作流程区 */
.workflow-section {
    background-color: var(--color-white);
}

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

.step {
    display: flex;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-right: 1.5rem;
}

.step-content {
    flex: 1;
}

/* CTA区域 */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    text-align: center;
    padding: 5rem 0;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

/* 关键词部分 */
.keywords-section {
    background: var(--color-light);
    padding: 3rem 0;
}

.keywords-wrapper {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.keywords-wrapper span {
    background: var(--color-white);
    color: var(--color-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    transition: var(--transition);
    border: 1px solid rgba(18, 140, 126, 0.2);
}

.keywords-wrapper span:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* 底部区域 */
.site-footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 3rem 0 1.5rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.footer-brand svg {
    margin-right: 0.75rem;
}

.footer-brand span {
    color: var(--color-white);
    font-size: 1.2rem;
    font-weight: 600;
}

.footer-text {
    max-width: 500px;
    margin: 0 auto 2rem;
}

.copyright, .disclaimer {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(18, 140, 126, 0.3);
}

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(18, 140, 126, 0.4);
}

.btn-cta {
    background: var(--color-white);
    color: var(--color-primary);
    padding: 1.2rem 3rem;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-content, .hero-visual {
        padding: 1rem 0;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-white);
        padding: 5rem 1.5rem 1.5rem;
        transition: right 0.3s ease;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        z-index: 99;
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .nav-menu {
        flex-direction: column;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 8px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -8px);
    }
    
    .hero-section .container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
        padding-right: 0;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        margin: 0 auto 1rem;
    }
}

@media (max-width: 576px) {
    section {
        padding: 3rem 0;
    }
    
    h2 {
        font-size: 2rem;
    }
}