:root {
    --bg-dark: #050505;
    --panel-bg: #111111;
    --border-color: #333333;
    --accent-primary: #ff6600;
    /* 工业橙 */
    --accent-secondary: #00ffcc;
    /* 赛博青 */
    --text-main: #a0a0a0;
    --text-highlight: #ffffff;
    --scan-line: rgba(0, 255, 204, 0.03);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) var(--bg-dark);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Courier New', Courier, monospace;
    height: 100vh;
    overflow: hidden;
    display: flex;
    background-image:
        linear-gradient(0deg, transparent 24%, rgba(0, 0, 0, .3) 25%, rgba(0, 0, 0, .3) 26%, transparent 27%, transparent 74%, rgba(0, 0, 0, .3) 75%, rgba(0, 0, 0, .3) 76%, transparent 77%, transparent),
        linear-gradient(90deg, transparent 24%, rgba(0, 0, 0, .3) 25%, rgba(0, 0, 0, .3) 26%, transparent 27%, transparent 74%, rgba(0, 0, 0, .3) 75%, rgba(0, 0, 0, .3) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
}

/* 扫描线效果 */
body::after {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    z-index: 2;
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
}

/* ---------------- 新增：启动首页样式 ---------------- */
#landing-page {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    transition: opacity 0.8s ease-out;
}

#landing-page.hide {
    opacity: 0;
    pointer-events: none;
}

.landing-logo {
    font-size: 3.5rem;
    color: var(--accent-primary);
    text-shadow: 0 0 30px rgba(255, 102, 0, 0.6);
    text-transform: uppercase;
    letter-spacing: 8px;
    margin-bottom: 20px;
    animation: logoGlow 2s infinite alternate;
}

.landing-desc {
    color: var(--accent-secondary);
    font-size: 1.1rem;
    letter-spacing: 2px;
    margin-bottom: 50px;
    text-transform: uppercase;
    animation: blink 1.2s infinite;
}

.start-btn {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: 18px 45px;
    font-family: inherit;
    font-size: 1.3rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    cursor: pointer;
    transition: all 0.3s;
    clip-path: polygon(15px 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%, 0 15px);
}

.start-btn:hover {
    background: var(--accent-primary);
    color: #000;
    box-shadow: 0 0 25px rgba(255, 102, 0, 0.5);
    transform: scale(1.05);
}

.landing-tips {
    position: absolute;
    bottom: 40px;
    font-size: 0.85rem;
    color: #555;
}

@keyframes logoGlow {
    from {
        text-shadow: 0 0 20px rgba(255, 102, 0, 0.3);
    }

    to {
        text-shadow: 0 0 40px rgba(255, 102, 0, 0.8);
    }
}


/* 左侧导航栏 */
.sidebar {
    width: 280px;
    background: var(--panel-bg);
    border-right: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
    position: relative;
}

.brand {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.brand h1 {
    color: var(--accent-primary);
    font-size: 1.5rem;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(255, 102, 0, 0.4);
    text-transform: uppercase;
}

.brand span {
    font-size: 0.8rem;
    color: var(--accent-secondary);
    display: block;
    margin-top: 5px;
}

.chapter-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.chapter-btn {
    width: 100%;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 15px;
    margin-bottom: 10px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.chapter-btn:hover {
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
    background: rgba(0, 255, 204, 0.05);
    padding-left: 20px;
}

.chapter-btn.active {
    background: var(--accent-primary);
    color: #000;
    border-color: var(--accent-primary);
    font-weight: bold;
    box-shadow: 0 0 15px rgba(255, 102, 0, 0.3);
}

.chapter-btn.active::before {
    content: '>';
    position: absolute;
    left: 5px;
    animation: blink 1s infinite;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 5;
}

.header-bar {
    height: 60px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    background: rgba(17, 17, 17, 0.9);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--accent-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
    box-shadow: 0 0 5px var(--accent-secondary);
    animation: pulse 2s infinite;
}

.reader-container {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}


.text-panel {
    height: fit-content;
    max-width: 800px;
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    padding: 40px;
    position: relative;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

/* 装饰性铆钉 */
.text-panel::before,
.text-panel::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: #222;
    border-radius: 50%;
    box-shadow: inset 1px 1px 2px #000;
    border: 1px solid #444;
}

.text-panel::before {
    top: 10px;
    left: 10px;
}

.text-panel::after {
    bottom: 10px;
    right: 10px;
}

.chapter-title {
    color: var(--accent-primary);
    font-size: 1.8rem;
    margin-bottom: 30px;
    border-left: 4px solid var(--accent-primary);
    padding-left: 15px;
    text-transform: uppercase;
}

.chapter-text {
    line-height: 1.8;
    font-size: 1.1rem;
    text-align: justify;
    color: #ccc;
}

.chapter-text p {
    margin-bottom: 20px;
}

/* 底部控制栏 */
.footer-controls {
    height: 50px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    background: var(--panel-bg);
}

.control-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 5px 15px;
    cursor: pointer;
    font-family: inherit;
    text-transform: uppercase;
    font-size: 0.8rem;
    transition: 0.3s;
}

.control-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 8px rgba(255, 102, 0, 0.2);
}

/* 动画 */
@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

@keyframes pulse {
    0% {
        opacity: 0.5;
        box-shadow: 0 0 0px var(--accent-secondary);
    }

    50% {
        opacity: 1;
        box-shadow: 0 0 10px var(--accent-secondary);
    }

    100% {
        opacity: 0.5;
        box-shadow: 0 0 0px var(--accent-secondary);
    }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #000;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border: 1px solid #000;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

.content p {
    line-height: 1.8;
    font-size: 17px;
    margin: 12px 0;
}

.deduction-block {
    margin: 20px 0;
    padding: 18px 22px;
    background-color: #f5f0ff;
    border-left: 4px solid #7b61ff;
    border-radius: 6px;
    color: #4a3b78;
    font-family: "楷体", serif;
    font-size: 16px;
    line-height: 1.7;
}

.cyber-btn {
    position: relative;
    padding: 8px 24px;
    background: transparent;
    border: 1px solid #00ffcc;
    color: #00ffcc;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
    box-shadow: 0 0 5px rgba(0, 255, 204, 0.2);
}

.cyber-btn:hover {
    background: rgba(0, 255, 204, 0.1);
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.6), inset 0 0 10px rgba(0, 255, 204, 0.2);
    text-shadow: 0 0 5px #00ffcc;
    transform: translateY(-2px);
}

.cyber-btn:active {
    transform: translateY(1px);
    box-shadow: 0 0 5px rgba(0, 255, 204, 0.4);
}

.cyber-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: #00ffcc;
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.cyber-btn:hover::before {
    transform: scaleY(1);
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
        overflow: auto;
        height: auto;
        min-height: 100vh;
    }

    .sidebar {
        width: 100%;
        height: auto;
        max-height: 220px;
        border-right: none;
        border-bottom: 2px solid var(--border-color);
    }

    .brand h1 {
        font-size: 1.2rem;
    }

    .chapter-list {
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
        gap: 8px;
        padding: 8px 12px;
    }

    .chapter-btn {
        min-width: 160px;
        margin-bottom: 0;
        font-size: 0.9rem;
        padding: 12px 10px;
        white-space: nowrap;
    }

    .main-content {
        width: 100%;
    }

    .header-bar {
        padding: 0 15px;
        height: auto;
        min-height: 50px;
        flex-wrap: wrap;
        gap: 10px;
    }

    .status-indicator {
        font-size: 0.8rem;
    }

    .reader-container {
        padding: 20px 15px;
    }

    .text-panel {
        padding: 20px 15px;
    }

    .chapter-title {
        font-size: 1.4rem;
    }

    .chapter-text {
        font-size: 1rem;
        line-height: 1.7;
    }

    .footer-controls {
        padding: 10px;
        flex-wrap: wrap;
        height: auto;
    }

    .control-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .landing-logo {
        font-size: 2rem;
        letter-spacing: 4px;
    }

    .landing-desc {
        font-size: 0.9rem;
    }

    .start-btn {
        padding: 15px 30px;
        font-size: 1.1rem;
    }
}