/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 淡色系配色方案 */
    --primary-color: #8B9FE8;
    --primary-light: #B8C5F6;
    --secondary-color: #E8B4D9;
    --accent-color: #FFD6A5;
    --bg-gradient-start: #F0F4FF;
    --bg-gradient-end: #FFF5F8;

    /* 文字颜色 */
    --text-primary: #4A4A6A;
    --text-secondary: #7A7A9A;
    --text-light: #9A9AB5;

    /* 卡片颜色 */
    --card-bg: #FFFFFF;
    --card-shadow: rgba(139, 159, 232, 0.08);
    --card-shadow-hover: rgba(139, 159, 232, 0.15);

    /* 其他颜色 */
    --border-color: #E8EAF6;
    --badge-bg: #FFE5F1;
    --badge-text: #D946A6;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 装饰背景动画 ===== */
.decorative-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #8B9FE8 0%, #B8C5F6 100%);
    top: -150px;
    right: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #E8B4D9 0%, #FFB4D9 100%);
    bottom: 100px;
    left: -80px;
    animation-delay: 7s;
}

.blob-3 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #FFD6A5 0%, #FFE5B4 100%);
    top: 50%;
    right: -50px;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(20px, 30px) scale(1.03);
    }
}

/* ===== 头部区域 ===== */
.header {
    padding: var(--spacing-md) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px var(--card-shadow);
}

.header-content {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    font-size: 1.8rem;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.badge {
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== 主要内容 ===== */
.main-content {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-xl);
}

/* ===== 欢迎区 ===== */
.welcome-section {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.welcome-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ===== 步骤卡片 ===== */
.steps-section {
    margin-bottom: var(--spacing-xl);
}

.step-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    transition: width 0.3s ease;
}

.step-primary::before {
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.step-secondary::before {
    background: linear-gradient(180deg, var(--secondary-color) 0%, #FFB4D9 100%);
}

.step-accent::before {
    background: linear-gradient(180deg, var(--accent-color) 0%, #FFE5B4 100%);
}

.step-card:active {
    transform: translateY(2px);
    box-shadow: 0 2px 15px var(--card-shadow);
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.step-primary .step-number {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.step-secondary .step-number {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #FFB4D9 100%);
}

.step-accent .step-number {
    background: linear-gradient(135deg, var(--accent-color) 0%, #FFE5B4 100%);
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.step-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.step-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.step-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.connector-line {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    opacity: 0.3;
}

.connector-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: -10px;
    opacity: 0.5;
}

/* ===== 信息区块 ===== */
.info-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-icon {
    font-size: 1.5rem;
}

/* ===== 截图类型卡片 ===== */
.type-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.type-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all 0.3s ease;
}

.type-card:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--card-shadow-hover);
}

.type-header {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.type-normal {
    background: linear-gradient(135deg, #E8F4FF 0%, #F0F8FF 100%);
}

.type-long {
    background: linear-gradient(135deg, #FFE8F5 0%, #FFF0F8 100%);
}

.type-icon {
    font-size: 2rem;
}

.type-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.type-body {
    padding: var(--spacing-md);
    padding-top: 0;
}

.type-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.type-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(139, 159, 232, 0.05);
    border-radius: 8px;
    margin-bottom: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.type-hint:last-child {
    margin-bottom: 0;
}

.hint-icon {
    font-size: 1rem;
}

/* ===== 模板指南 ===== */
.template-guide {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.guide-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-md);
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all 0.3s ease;
}

.guide-card:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--card-shadow-hover);
}

.guide-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.guide-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.guide-long .guide-icon {
    background: linear-gradient(135deg, #FFE8F5 0%, #FFF0F8 100%);
}

.guide-normal .guide-icon {
    background: linear-gradient(135deg, #E8F4FF 0%, #F0F8FF 100%);
}

.guide-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.guide-templates {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--primary-color);
    background: rgba(139, 159, 232, 0.1);
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    font-weight: 500;
}

.guide-body p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== 重要提示 ===== */
.important-note {
    background: linear-gradient(135deg, #FFF9E6 0%, #FFFEF0 100%);
    border: 2px solid #FFE5B4;
    border-radius: 12px;
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.note-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.important-note p {
    color: #8B7355;
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

/* ===== 操作限制 ===== */
.limits-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.limit-item {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: 0 4px 20px var(--card-shadow);
}

.limit-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.limit-count {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.limit-size {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #FFB4D9 100%);
}

.limit-text {
    display: flex;
    flex-direction: column;
}

.limit-label {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0.2rem;
}

.limit-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== 实用技巧 ===== */
.tips-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tip-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all 0.3s ease;
}

.tip-card:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--card-shadow-hover);
}

.tip-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #F5F0FF 0%, #FBF8FF 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.tip-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.tip-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 总结区 ===== */
.summary-section {
    margin-bottom: var(--spacing-lg);
}

.summary-card {
    background: linear-gradient(135deg, #FEFEFE 0%, #F8F9FF 100%);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: var(--spacing-lg);
    text-align: center;
}

.summary-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.summary-icon {
    font-size: 2rem;
    animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.summary-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.summary-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.summary-step {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.step-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
}

.step-arrow {
    color: var(--primary-light);
    font-size: 1rem;
}

.summary-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ===== 页脚 ===== */
.footer {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-lg) var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== 响应式优化 ===== */
@media (max-width: 375px) {
    .welcome-title {
        font-size: 1.7rem;
    }

    .step-card {
        padding: var(--spacing-sm);
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .step-icon {
        font-size: 1.5rem;
    }
}

/* ===== 滚动平滑 ===== */
html {
    scroll-behavior: smooth;
}

/* ===== 选中文本样式 ===== */
::selection {
    background: var(--primary-light);
    color: white;
}

::-moz-selection {
    background: var(--primary-light);
    color: white;
}