/* ===== 现代绿色主题设计 ===== */

/* 1. Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800;900&display=swap');

/* 2. 现代绿色主题配色方案 */
:root {
    --primary-bg: #FFFFFF;           /* 主背景色 - 纯白 */
    --accent-green: #26a687;         /* 主绿色 - 青绿色 */
    --accent-green-hover: #219975;   /* 绿色悬停态 */
    --tool-bg: #ddf8f2;              /* 核心区域背景 - 浅绿 */
    --text-primary: #2D3748;         /* 主文字 - 深蓝灰 */
    --text-secondary: #4A5568;       /* 次要文字 */
    --text-light: #718096;           /* 浅色文字 */
    --border-light: #E2E8F0;         /* 浅色边框 */
    --card-bg: #F7FAFC;              /* 卡片背景 */
    --font-primary: 'Montserrat', sans-serif; /* 主字体 */
}

/* 3. Basic Reset & Body Styles */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

main, header, footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

section {
    margin-bottom: 40px;
    border-radius: 12px;
    padding: 30px;
}

/* 4. Typography */
h1, h2 {
    font-family: var(--font-primary);
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0;
}

h2 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.1;
}

/* 特殊样式：核心工具区域的大标题 */
#tool h2 {
    font-size: 4rem;
    font-weight: 900;
    color: var(--text-primary);
    margin: 0 0 24px 0;
    line-height: 1.1;
    letter-spacing: -1px;
}

/* 5. Header & Navigation */
header {
    border-bottom: 1px solid var(--border-light);
    padding: 20px 20px 0 20px;
    background-color: var(--primary-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo h1 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(to right, #3ccfb0, #1a7561);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo p {
    color: var(--text-secondary);
    margin: 5px 0 0 0;
    font-size: 1rem;
    font-weight: 400;
    font-family: var(--font-primary);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 0;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    display: block;
    margin-left: 30px;
}

nav ul li a:hover {
    color: var(--accent-green);
}

/* 6. Core Tool Section */
#tool {
    background-color: var(--tool-bg);
    padding: 45px 40px;
    text-align: center;
    border-radius: 16px;
    margin: 20px 0;
}

.tool-modes {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 40px;
}

.mode-random, .mode-guided {
    background-color: var(--card-bg);
    padding: 24px 45px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    text-align: center;
    display: flex;
    flex-direction: column;
}

.mode-random {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mode-random p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.25rem;
    font-weight: 500;
}

.mode-guided {
    display: flex;
    flex-direction: column;
}

.mode-guided > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.25rem;
    font-weight: 500;
}

.guided-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
    margin: 0;
}

/* 新增：选择框组样式 */
.select-group {
    display: flex;
    gap: 16px;
    width: 100%;
}

.select-group .question {
    flex: 1;
    margin-bottom: 0;
}

/* 调整按钮样式 - 优化性能的新拟态风格立体按钮 */
button {
    background: linear-gradient(145deg, #f2f8f5, #e8f6f3);
    color: #1e8a73;
    border-top: 1px solid rgba(30, 138, 115, 0.2);
    border-left: 1px solid rgba(30, 138, 115, 0.22);
    border-right: 1px solid rgba(30, 138, 115, 0.42);
    border-bottom: 1px solid rgba(30, 138, 115, 0.45);
    padding: 16px 28px;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    font-family: var(--font-primary);
    font-size: 1.05rem;
    transition: all 0.3s ease-out;
    width: 22.22%;
    min-height: 48px;
    /* 加深阴影：增强立体感 */
    box-shadow: 
        6px 6px 12px rgba(30, 138, 115, 0.22),
        -6px -6px 12px rgba(255, 255, 255, 0.8),
        inset 1px 1px 2px rgba(255, 255, 255, 0.9);
    position: relative;
    transform: translateY(0);
    /* 移除呼吸动画，保持静态效果 */
}

/* 确保 random 区域按钮和 guided 区域按钮宽度一致 */
.mode-random button,
.guided-controls button {
    width: 22.22%;
    display: block;
    margin: 0 auto;
    /* 继承所有按钮的渐变和动画效果 */
}

/* 特殊字体效果 - 只应用于主要按钮 */
#randomize-btn,
#find-activity-btn {
    font-weight: 800 !important;
    letter-spacing: 1px !important;
    font-size: 1.2rem !important;
}

/* 7. Informational Sections - 统一白色背景 */
#why, #how, #faq {
    background-color: var(--card-bg);
    border: 1px solid var(--border-light);
}

/* 8. Buttons and Links */
button:hover {
    background: linear-gradient(145deg, #edf7f2, #ddf2ed);
    color: #1e8a73;
    border-top: 1px solid rgba(30, 138, 115, 0.25);
    border-left: 1px solid rgba(30, 138, 115, 0.27);
    border-right: 1px solid rgba(30, 138, 115, 0.47);
    border-bottom: 1px solid rgba(30, 138, 115, 0.5);
    transform: translateY(-2px);
    /* 加深悬停阴影：增强立体感 */
    box-shadow: 
        8px 8px 16px rgba(30, 138, 115, 0.28),
        -8px -8px 16px rgba(255, 255, 255, 0.9),
        inset 1px 1px 2px rgba(255, 255, 255, 0.95);
}

/* 按钮点击效果 */
button:active {
    transform: translateY(1px);
    /* 加深点击阴影：增强按下感 */
    box-shadow: 
        3px 3px 6px rgba(30, 138, 115, 0.25),
        -3px -3px 6px rgba(255, 255, 255, 0.6),
        inset 2px 2px 4px rgba(30, 138, 115, 0.2);
    transition: all 0.1s ease-out;
}

/* 呼吸动画已移除 - 保持静态按钮效果 */

a {
    color: var(--text-primary);
    font-weight: 500;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.7;
}

/* 9. Form Elements */
select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    background-color: white;
    margin-top: 8px;
    margin-bottom: 16px;
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234A5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.question {
    text-align: left;
    margin-bottom: 20px;
}

.question label {
    font-weight: 500;
    color: var(--text-primary);
    display: block;
}

/* 10. Result Card */
/* 模态弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: var(--primary-bg);
    border-radius: 16px;
    padding: 0;
    margin: 20px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    transform: scale(1);
    transition: transform 0.3s ease;
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.9);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none !important;
    border: none !important;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    z-index: 1001;
    padding: 8px;
    line-height: 1;
    transition: color 0.2s ease;
    width: auto !important;
    min-height: auto !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    animation: none !important;
    transform: none !important;
    font-family: inherit !important;
    font-weight: normal !important;
    letter-spacing: normal !important;
}

.modal-close:hover {
    color: var(--text-primary);
    background: none !important;
    border: none !important;
    transform: none !important;
    box-shadow: none !important;
}

.modal-close:active {
    background: none !important;
    border: none !important;
    transform: none !important;
    box-shadow: none !important;
}

.modal-body {
    padding: 40px;
    text-align: center;
}

.modal-body .activity-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 20px 0;
    line-height: 1.2;
}

.modal-body .activity-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 25px 0;
}

.modal-body .activity-link {
    display: inline-block;
    color: var(--accent-green);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 30px;
    transition: color 0.2s ease;
}

.modal-body .activity-link:hover {
    color: var(--accent-green-hover);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.modal-actions button {
    flex: 1;
    min-width: 100px;
    max-width: 140px;
    padding: 12px 16px;
    font-size: 0.95rem;
    white-space: nowrap;
}

/* 11. Mobile Responsiveness */
@media (max-width: 768px) {
    .select-group {
        flex-direction: column;
        align-items: center;
        gap: 14px;
    }

    .select-group .question {
        width: 80%;
    }

    button {
        width: 40%;
        padding: 16px 24px;
        font-size: 1rem;
        text-align: center;
        margin: 0 auto;
    }

    .mode-random button,
    .guided-controls button {
        width: 40%;
        display: block;
        margin: 0 auto;
        text-align: center;
    }

    .mode-random,
    .mode-guided {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .guided-controls {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 20px;
        text-align: left;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 2.5rem;
    }
    
    #tool h2 {
        font-size: 3rem;
        margin-bottom: 14px;
    }

    nav {
        width: 100%;
    }

    #tool {
        padding: clamp(20px, 5vw, 35px);
        margin: 16px auto;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
    }

    .tool-modes {
        gap: 24px;
        margin: clamp(20px, 4vw, 30px) auto 0;
        padding: 0;
        width: 100%;
        max-width: 800px;
    }

    .mode-random, 
    .mode-guided {
        padding: clamp(16px, 4vw, 24px);
        margin: 0 auto;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .mode-random {
        min-height: 120px;
    }

    /* 移动端模态弹窗适配 */
    .modal-content {
        width: 95%;
        max-width: none;
        margin: 10px;
    }

    .modal-body {
        padding: 30px 20px;
    }

    .modal-body .activity-title {
        font-size: 1.5rem;
    }

    .modal-body .activity-description {
        font-size: 1rem;
    }

    .modal-actions {
        flex-direction: row;
        gap: 8px;
    }

    .modal-actions button {
        flex: 1;
        min-width: 80px;
        max-width: none;
        padding: 12px 8px;
        font-size: 0.9rem;
    }

    /* 超小屏幕垂直布局 */
    @media (max-width: 360px) {
        .modal-actions {
            flex-direction: column;
            gap: 8px;
        }

        .modal-actions button {
            width: 100%;
            min-width: auto;
            max-width: none;
        }
    }
}

/* 特小屏幕适配 */
@media (max-width: 480px) {
    .select-group .question {
        width: 100%;
    }

    button,
    .mode-random button,
    .guided-controls button {
        width: 100%;
        margin-top: 8px;
    }

    select {
        padding: 16px;
    }

    #tool {
        padding: 25px 16px;
    }

    #tool h2 {
        font-size: 2.5rem;
        margin-bottom: 12px;
    }

    .tool-modes {
        gap: 20px;
        margin-top: 24px;
    }

    .mode-random, 
    .mode-guided {
        padding: 20px 16px;
    }

    .mode-random {
        min-height: 110px;
    }

    /* 小屏幕模态弹窗适配 */
    .modal-content {
        width: 95%;
        margin: 5px;
    }

    .modal-body {
        padding: 25px 15px;
    }

    .modal-body .activity-title {
        font-size: 1.3rem;
    }

    .modal-body .activity-description {
        font-size: 0.95rem;
    }
}

/* 优化触屏设备的交互体验 */
@media (hover: none) {
    button:hover {
        background: linear-gradient(145deg, #f5faf8, #e8f6f3, #ddf2ed);
        color: #1e8a73;
        border: 1px solid rgba(30, 138, 115, 0.15);
        transform: translateY(0);
        /* 移动端简化悬停阴影：减少到2层，但加深颜色 */
        box-shadow: 
            8px 8px 16px rgba(30, 138, 115, 0.22),
            -8px -8px 16px rgba(255, 255, 255, 0.7);
    }
    
    /* 移动端也移除呼吸动画 */
    button {
        /* 保持静态按钮效果 */
    }
}

/* 移动端呼吸动画也已移除 */

/* 12. Footer and Ad Placeholder */
#sticky-ad-placeholder {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--card-bg);
    text-align: center;
    padding: 10px 0;
    border-top: 1px solid var(--border-light);
    z-index: 100;
}

footer {
    text-align: center;
    padding-bottom: 80px;
    color: var(--text-secondary);
}

/* 徽章区域样式 */
.badges-section {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px 20px;
}

.badges-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.badge-item {
    display: inline-block;
    padding: 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.badge-item img {
    width: 200px;
    height: 54px;
    display: block;
}

/* SVG徽章样式 */
.badge-item svg {
    width: 180px;
    height: 60px;
    display: block;
}

.badge-item:hover {
    background-color: var(--tool-bg);
    transform: scale(1.05);
}

/* 汉堡菜单按钮 */
.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1000;
    position: relative;
}

.hamburger-menu span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--accent-green);
    margin: 5px 0;
    transition: 0.3s;
}

/* 导航遮罩层 */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s;
}

.nav-overlay.active {
    opacity: 1;
}

/* 移动端导航样式 */
@media (max-width: 768px) {
    .hamburger-menu {
        display: block;
        background: none !important;
        border: none !important;
        width: auto !important;
        min-height: auto !important;
        transform: none !important;
        padding: 8px;
        margin-right: 8px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 65%;
        max-width: 240px;
        height: 100vh;
        background-color: var(--primary-bg);
        padding: 80px 24px 24px;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 999;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 8px;
    }

    .nav-menu ul li a {
        display: block;
        padding: 16px;
        margin: 0;
        font-size: 1.1rem;
        width: 100%;
        border-radius: 8px;
        transition: all 0.2s ease;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .nav-menu ul li a:hover {
        background: var(--tool-bg);
    }

    /* 遮罩层优化 */
    .nav-overlay {
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* 汉堡菜单动画 */
    .hamburger-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* 当导航打开时禁止页面滚动 */
    body.nav-open {
        overflow: hidden;
    }
}

/* 平板设备补充优化（方案三核心） */
@media (min-width: 769px) and (max-width: 1024px) and (hover: none) {
    /* iPad等平板设备的特殊处理 */
    .hamburger-menu {
        display: block; /* 平板也显示汉堡菜单 */
        background: none !important;
        border: none !important;
        width: auto !important;
        min-height: auto !important;
        transform: none !important;
        padding: 8px;
        margin-right: 8px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 55%;
        max-width: 260px;
        height: 100vh;
        background-color: var(--primary-bg);
        padding: 80px 24px 24px;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 999;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 12px;
    }

    .nav-menu ul li a {
        display: block;
        padding: 12px 16px; /* 适中的点击区域 */
        margin: 0;
        font-size: 1.1rem;
        width: 100%;
        border-radius: 8px;
        transition: all 0.2s ease;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .nav-menu ul li a:hover {
        background: var(--tool-bg);
    }

    /* 平板设备的遮罩层 */
    .nav-overlay {
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* 平板设备汉堡菜单动画 */
    .hamburger-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* 当导航打开时禁止页面滚动 */
    body.nav-open {
        overflow: hidden;
    }
}

/* 徽章响应式样式 */
/* 平板端 (768px以下) */
@media (max-width: 768px) {
    .badges-section {
        padding: 20px 16px;
        margin-bottom: 24px;
    }
    
    .badges-container {
        gap: 16px;
        max-width: 600px;
    }
    
    .badge-item {
        padding: 10px;
    }
    
    .badge-item img {
        width: 160px;
        height: 43px;
    }
    
    .badge-item svg {
        width: 144px;
        height: 48px;
    }
}

/* 手机端 (480px以下) */
@media (max-width: 480px) {
    .badges-section {
        padding: 16px 12px;
        margin-bottom: 20px;
    }
    
    .badges-container {
        gap: 12px;
        max-width: none;
    }
    
    .badge-item {
        padding: 8px;
    }
    
    .badge-item img {
        width: 120px;
        height: 32px;
    }
    
    .badge-item svg {
        width: 108px;
        height: 36px;
    }
}

/* 小屏手机 (360px以下) */
@media (max-width: 360px) {
    .badges-container {
        gap: 8px;
    }
    
    .badge-item {
        padding: 6px;
    }
    
    .badge-item img {
        width: 100px;
        height: 27px;
    }
    
    .badge-item svg {
        width: 90px;
        height: 30px;
    }
}