/* 字体定义 */
@font-face {
    font-family: 'LXGWWenKai';
    src: url('../font/LXGWWenKai-Regular.ttf') format('truetype');
}

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

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray: #9A9A9A;
    --font-size-small: 12px;
    --font-size-medium: 14px;
    --font-size-large: 16px;
    --font-size-title: 24px;
    --font-size-hero: 48px;
}

body {
    font-family: 'LXGWWenKai', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--font-size-medium);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 导航栏 */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray);
    border-radius: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-content {
    width: 100%;
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo a {
    text-decoration: none;
    color: inherit;
}

.logo-img {
    height: 40px;
    width: auto;
    border-radius: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--color-black);
    text-decoration: none;
    font-size: var(--font-size-medium);
    transition: opacity 0.3s;
}

.nav-link:hover {
    opacity: 0.6;
}

/* 主内容 */
.main-content {
    margin-top: 60px;
    width: 100%;
}

/* Hero区域 */
.hero {
    min-height: calc(100vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
}

.hero-dog {
    width: 200px;
    height: auto;
    margin-bottom: 30px;
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: normal;
    margin-bottom: 20px;
    color: var(--color-black);
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-gray);
    margin-bottom: 10px;
}

.hero-description {
    font-size: var(--font-size-medium);
    color: var(--color-gray);
    margin-bottom: 40px;
}

/* 按钮 */
.btn-download {
    display: inline-block;
    padding: 12px 40px;
    background-color: var(--color-black);
    color: var(--color-white);
    text-decoration: none;
    font-size: var(--font-size-medium);
    border: 1px solid var(--color-black);
    border-radius: 6px;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-download:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-download-large {
    padding: 16px 60px;
    font-size: var(--font-size-large);
}

/* 功能特点 */
.features {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: var(--font-size-title);
    font-weight: normal;
    text-align: center;
    margin-bottom: 60px;
    color: var(--color-black);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    padding: 30px;
    border: 1px solid var(--color-gray);
    border-radius: 6px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 极简线条图标 - 使用纯CSS绘制 */

/* 事项管理图标 - 线条列表 */
.feature-icon.icon-todo::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-black);
    box-shadow: 0 6px 0 var(--color-black), 0 12px 0 var(--color-black), 0 18px 0 var(--color-black);
}

/* 多视图图标 - 日历 */
.feature-icon.icon-calendar::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-black);
    border-radius: 2px;
}

.feature-icon.icon-calendar::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 1px;
    background: var(--color-black);
    top: 6px;
    box-shadow: 0 3px 0 var(--color-black), 0 6px 0 var(--color-black);
}

/* 标签图标 - 标签 */
.feature-icon.icon-tag::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 1px solid var(--color-black);
    border-right: none;
    border-bottom: none;
    transform: rotate(45deg);
    top: 8px;
    left: 12px;
}

.feature-icon.icon-tag::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    border: 1px solid var(--color-black);
    border-radius: 50%;
    top: 18px;
    left: 18px;
}

/* 搜索图标 - 放大镜 */
.feature-icon.icon-search::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border: 1px solid var(--color-black);
    border-radius: 50%;
    top: 8px;
    left: 8px;
}

.feature-icon.icon-search::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 1px;
    background: var(--color-black);
    transform: rotate(45deg);
    top: 18px;
    left: 18px;
}

/* 统计图标 - 柱状图 */
.feature-icon.icon-chart::before {
    content: '';
    position: absolute;
    width: 3px;
    height: 12px;
    background: var(--color-black);
    bottom: 8px;
    left: 10px;
    box-shadow: 6px 0 0 var(--color-black), 12px 4px 0 var(--color-black), 18px 0 0 var(--color-black);
}

/* 本地存储图标 - 锁 */
.feature-icon.icon-lock::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 8px;
    border: 1px solid var(--color-black);
    border-radius: 2px 2px 0 0;
    border-bottom: none;
    top: 12px;
    left: 14px;
}

.feature-icon.icon-lock::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    border: 1px solid var(--color-black);
    border-radius: 50%;
    border-bottom: none;
    top: 10px;
    left: 17px;
}

.feature-title {
    font-size: var(--font-size-large);
    font-weight: normal;
    margin-bottom: 15px;
    color: var(--color-black);
}

.feature-desc {
    font-size: var(--font-size-medium);
    color: var(--color-gray);
    line-height: 1.8;
}

/* 图片轮播 */
.gallery {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.carousel-container {
    position: relative;
    max-width: 350px;
    margin: 0 auto;
}

.carousel-wrapper {
    position: relative;
    overflow: hidden;
    background-color: var(--color-white);
    max-height: 600px;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

.carousel-track {
    display: flex;
    transition: transform 0.3s ease;
}

.carousel-slide {
    min-width: 100%;
    flex-shrink: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
    max-height: 600px;
    object-fit: contain;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    font-size: 32px;
    color: var(--color-black);
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s;
    font-family: 'LXGWWenKai';
}

.carousel-btn:hover {
    opacity: 0.6;
}

.carousel-prev {
    left: -50px;
}

.carousel-next {
    right: -50px;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid var(--color-gray);
    background-color: var(--color-white);
    cursor: pointer;
    transition: all 0.3s;
}

.carousel-dot.active {
    background-color: var(--color-black);
    border-color: var(--color-black);
}

/* 下载区域 */
.download {
    padding: 80px 20px;
    background-color: #f9f9f9;
}

.download-content {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.download-box {
    padding: 50px 40px;
    border: 1px solid var(--color-gray);
    border-radius: 6px;
    background-color: var(--color-white);
}

.download-platform-title {
    font-size: var(--font-size-large);
    font-weight: normal;
    color: var(--color-black);
    margin-bottom: 30px;
    text-align: center;
}

.download-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--color-gray);
}

.download-info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.download-info-label {
    font-size: var(--font-size-small);
    color: var(--color-gray);
}

.download-info-value {
    font-size: var(--font-size-medium);
    color: var(--color-black);
    font-weight: normal;
}

.download-desc {
    font-size: var(--font-size-medium);
    color: var(--color-gray);
    margin-bottom: 10px;
}

.download-message {
    margin-top: 16px;
    font-size: var(--font-size-medium);
    min-height: 24px;
}

.download-message.success {
    color: var(--color-black);
}

.download-message.error {
    color: var(--color-gray);
}

.download-tip {
    margin-top: 16px;
    font-size: var(--font-size-small);
    color: var(--color-gray);
}

/* 关于 */
.about {
    padding: 80px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.about-text {
    font-size: var(--font-size-large);
    color: var(--color-black);
    line-height: 2;
    text-align: left;
}

.about-text p {
    margin-bottom: 10px;
    text-indent: 2em;
}

.about-text strong {
    color: var(--color-black);
    font-weight: bold;
}

.about-dog {
    text-align: center;
    margin-top: 20px;
}

.about-dog-img {
    width: 150px;
    height: auto;
    margin-bottom: 10px;
}

.about-dog-name {
    font-size: var(--font-size-medium);
    color: var(--color-gray);
}

/* 页脚 */
.footer {
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid var(--color-gray);
}

.footer-text {
    font-size: var(--font-size-small);
    color: var(--color-gray);
    margin-bottom: 8px;
}

.footer-icp {
    font-size: var(--font-size-small);
    color: var(--color-gray);
}

.footer-icp a {
    color: var(--color-gray);
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-icp a:hover {
    opacity: 0.6;
}

/* 使用说明页面 */
.instruction-main {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
    gap: 0;
}

.instruction-sidebar {
    width: 200px;
    flex-shrink: 0;
    padding: 80px 20px 40px 24px;
}

.instruction-toc-nav {
    position: sticky;
    top: 80px;
}

.instruction-toc-title {
    font-size: var(--font-size-large);
    font-weight: normal;
    margin-bottom: 20px;
    color: var(--color-black);
}

.instruction-toc {
    list-style: none;
    margin: 0;
    padding: 0;
    border-left: 1px solid var(--color-gray);
}

.instruction-toc li {
    margin-bottom: 0;
}

.instruction-toc a {
    display: block;
    padding: 8px 0 8px 16px;
    font-size: var(--font-size-medium);
    color: var(--color-gray);
    text-decoration: none;
    border-left: 2px solid transparent;
    margin-left: -1px;
    transition: color 0.2s, border-color 0.2s;
}

.instruction-toc a:hover {
    color: var(--color-black);
}

.instruction-toc a:active {
    color: var(--color-black);
    border-left-color: var(--color-black);
}

.instruction-content {
    flex: 1;
    min-width: 0;
    max-width: 900px;
    margin: 0;
    padding: 80px 24px 40px 20px;
    font-size: var(--font-size-large);
}

.instruction-title {
    font-size: 28px;
    font-weight: normal;
    margin-bottom: 40px;
    text-align: center;
    color: var(--color-black);
}

.instruction-content h2 {
    font-size: 20px;
    font-weight: normal;
    margin: 48px 0 20px;
    padding-top: 24px;
    border-top: 1px solid var(--color-gray);
    color: var(--color-black);
}

.instruction-content h2:first-of-type {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.instruction-content h3 {
    font-size: var(--font-size-large);
    font-weight: normal;
    margin: 24px 0 16px;
    color: var(--color-black);
}

.instruction-content p {
    margin-bottom: 16px;
    text-indent: 2em;
    line-height: 1.8;
    color: var(--color-black);
}

.instruction-content p:has(img) {
    text-indent: 0;
}

.instruction-content ul {
    margin: 16px 0 16px 2em;
    line-height: 1.8;
}

.instruction-content a {
    color: var(--color-black);
    text-decoration: underline;
    transition: opacity 0.3s;
}

.instruction-content a:hover {
    opacity: 0.6;
}

.instruction-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 16px 0;
    border: 1px solid var(--color-gray);
    border-radius: 6px;
}

/* 工具类 */
.hidden {
    display: none !important;
}

.nav-link-active {
    font-weight: bold;
}

/* 目录悬浮按钮 - 仅移动端显示 */
.toc-float-btn {
    display: none;
}

/* 使用说明页面 - 响应式 */
@media (max-width: 900px) {
    .instruction-main {
        flex-direction: column;
    }

    .instruction-sidebar {
        width: 100%;
        padding: 60px 20px 20px;
        border-bottom: 1px solid var(--color-gray);
    }

    .instruction-toc-nav {
        position: static;
    }

    .instruction-toc {
        display: flex;
        flex-wrap: wrap;
        gap: 8px 24px;
        border-left: none;
    }

    .instruction-toc li {
        flex: 0 0 auto;
    }

    .instruction-toc a {
        padding: 4px 0;
        margin-left: 0;
        border-left: none;
    }

    .instruction-content {
        padding: 20px 20px 40px;
    }
}

/* 移动端：隐藏侧边栏，显示悬浮按钮 */
@media (max-width: 900px) {
    .toc-float-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        right: 20px;
        bottom: 24px;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        background-color: var(--color-black);
        color: var(--color-white);
        border: none;
        font-size: var(--font-size-medium);
        font-family: inherit;
        cursor: pointer;
        z-index: 999;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .toc-float-btn:hover {
        transform: scale(1.05);
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    }

    .toc-float-btn:active {
        transform: scale(0.98);
    }

    .instruction-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 998;
        background-color: var(--color-white);
        padding: 80px 24px 100px;
        overflow-y: auto;
        transform: translateX(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
        border: none;
    }

    body.toc-open .instruction-sidebar {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    body.toc-open .instruction-sidebar::before {
        content: '点击任意链接关闭';
        display: block;
        font-size: var(--font-size-small);
        color: var(--color-gray);
        margin-bottom: 20px;
    }

    .instruction-toc {
        flex-direction: column;
        flex-wrap: nowrap;
        gap: 0;
        border-left: 1px solid var(--color-gray);
    }

    .instruction-toc li {
        flex: none;
    }

    .instruction-toc a {
        padding: 10px 0 10px 16px;
        margin-left: 0;
        border-left: 2px solid transparent;
        margin-left: -1px;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .nav-link {
        font-size: var(--font-size-small);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-box {
        padding: 30px 20px;
    }
    
    .download-info-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding-bottom: 20px;
    }
    
    .carousel-container {
        max-width: 100%;
        padding: 0 40px;
    }
    
    .carousel-wrapper {
        max-height: 500px;
    }
    
    .carousel-slide img {
        max-height: 500px;
    }
    
    .carousel-prev {
        left: 0;
    }
    
    .carousel-next {
        right: 0;
    }
    
    .carousel-btn {
        width: 32px;
        height: 32px;
        font-size: 24px;
        background-color: rgba(255, 255, 255, 0.8);
    }
}