/* 
 * 广阳AI动漫造物者论坛 - 极简发布会 H5 样式表
 * 风格参考：乔布斯发布会极简风、黑场、强光影、银灰金属色
 */

:root {
    --bg-color: #000000;
    --text-primary: #ffffff;
    --text-secondary: #86868b; /* 苹果经典深灰色 */
    --accent-blue: #0066cc;
    --accent-cyan: #00f2fe;
    --accent-purple: #7f00ff;
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Inter", "PingFang SC", "Source Han Sans CN", "Microsoft YaHei", sans-serif;
    --transition-duration: 1.6s;
    --transition-easing: cubic-bezier(0.16, 1, 0.3, 1); /* 电影质感的流畅阻尼曲线 (easeOutExpo) */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: var(--font-sans);
    color: var(--text-primary);
    cursor: default;
    user-select: none;
    -webkit-user-select: none;
}

/* ==========================================
   Canvas 背景样式
   ========================================== */
#canvas-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none; /* 穿透，让底层事件向上冒泡到 main 容器 */
    background: radial-gradient(circle at 50% 50%, #030308 0%, #000000 100%);
    transition: background 2s ease;
}

/* ==========================================
   页面容器与布局
   ========================================== */
.app-container {
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.slides-container {
    position: relative;
    width: 100%;
    flex-grow: 1;
    overflow: hidden;
}

/* ==========================================
   Slide 幻灯片单页样式
   ========================================== */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 8%;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.96) translateZ(0); /* 默认为缩小的远景状态 */
    transition: opacity var(--transition-duration) var(--transition-easing),
                transform var(--transition-duration) var(--transition-easing);
    will-change: opacity, transform;
}

/* 激活状态的 Slide */
.slide.active {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1) translateZ(0); /* 回归正常大小，形成拉近感 */
}

/* 上一页退出时的状态 (可选，增加空间错落感) */
.slide.exited {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.05) translateZ(0); /* 放大淡出，形成穿梭感 */
}

.slide-content {
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* ==========================================
   文字排版与动效
   ========================================== */
.main-title {
    font-size: 3.5rem;
    font-weight: 400; /* 提升一点粗度，类似苹果官网的高级感 */
    line-height: 1.35;
    letter-spacing: 0.06em; /* 紧凑呼吸感的字距 */
    margin-bottom: 1.8rem;
    background: linear-gradient(to bottom, #ffffff 40%, #c8c8cd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 80px rgba(255, 255, 255, 0.12);
    word-break: keep-all;
}

.sub-title {
    font-size: 1.45rem;
    font-weight: 300;
    line-height: 1.75;
    color: #a1a1a6; /* 苹果浅灰 */
    letter-spacing: 0.04em;
    max-width: 850px;
    word-break: break-all;
}

.en-title {
    font-size: 0.85rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.22em; /* 宽间距英文字符，体现高级感 */
    color: var(--text-secondary);
    opacity: 0.65;
    margin-top: 2rem;
    max-width: 850px;
    line-height: 1.6;
    word-break: normal;
    overflow-wrap: break-word;
}

/* 文字淡入动画控制 */
.text-fade {
    opacity: 0;
    transform: translateY(20px) translateZ(0);
    transition: opacity 1.8s var(--transition-easing),
                transform 1.8s var(--transition-easing);
    will-change: opacity, transform;
}

.slide.active .text-fade {
    opacity: 1;
    transform: translateY(0) translateZ(0);
}

.delay-1 {
    transition-delay: 0.3s;
}

.delay-2 {
    transition-delay: 0.6s;
}

.delay-3 {
    transition-delay: 0.9s;
}

/* ==========================================
   第9页：论坛主视觉 Climax 样式
   ========================================== */
.slide-climax .pre-title {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--accent-cyan);
    letter-spacing: 0.3em;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    text-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.slide-climax .climax-title {
    font-size: 5rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #b8c6db 60%, #8697b3 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 100px rgba(255, 255, 255, 0.25);
}

.slide-climax .climax-sub-title {
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: 0.25em;
    margin-bottom: 4rem;
    opacity: 0.85;
}

.info-footer {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

.info-footer .divider {
    opacity: 0.3;
    color: var(--text-secondary);
}

/* ==========================================
   极简底栏 (Footer) 样式
   ========================================== */
.presentation-footer {
    width: 100%;
    height: 80px;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
    pointer-events: none; /* 让鼠标点击能穿透到底层触发换页 */
}

/* 指示点 */
.indicator-bar {
    display: flex;
    gap: 12px;
    pointer-events: auto; /* 允许点击小点切换 */
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.15);
    cursor: pointer;
    transition: background-color 0.4s ease, transform 0.4s ease;
}

.dot:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

.dot.active {
    background-color: var(--text-primary);
    transform: scale(1.3);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* 右下角页码（控制模式触发器） */
.page-number-trigger {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    cursor: pointer;
    pointer-events: auto; /* 允许点击 */
    padding: 10px;
    border-radius: 4px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.page-number-trigger:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.page-number-trigger .current {
    font-weight: 400;
    color: var(--text-primary);
}

.page-number-trigger .slash {
    margin: 0 3px;
    opacity: 0.5;
}

/* ==========================================
   演讲者模式控制面板 (Presenter Mode)
   ========================================== */
.presenter-panel {
    position: fixed;
    bottom: -400px; /* 隐藏在屏幕下方 */
    left: 50%;
    transform: translateX(-50%) translateZ(0);
    width: 90%;
    max-width: 800px;
    background: rgba(12, 12, 18, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -20px 50px rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
    pointer-events: auto;
    transition: bottom 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: bottom;
}

.presenter-panel.open {
    bottom: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-cyan);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.close-panel-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-panel-btn:hover {
    color: var(--text-primary);
}

.panel-body {
    padding: 24px;
}

.prompt-box {
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--accent-cyan);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 20px;
}

.prompt-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.prompt-text {
    font-size: 1.15rem;
    line-height: 1.7;
    color: #e5e5ea;
    font-weight: 300;
}

.next-preview {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    margin-bottom: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 16px;
}

.next-label {
    color: var(--text-secondary);
}

.next-title {
    color: var(--text-primary);
    font-weight: 400;
}

.presenter-controls {
    display: flex;
    gap: 16px;
}

.ctrl-btn {
    flex: 1;
    padding: 14px 20px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 400;
    cursor: pointer;
    border: none;
    transition: background-color 0.2s, color 0.2s, transform 0.1s;
    outline: none;
}

.btn-prev {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-prev:hover {
    background: rgba(255, 255, 255, 0.12);
}

.btn-next {
    background: var(--text-primary);
    color: #000000;
    font-weight: 600;
}

.btn-next:hover {
    background: #e5e5ea;
}

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

/* ==========================================
   引导提示
   ========================================== */
.tap-tip {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    pointer-events: none;
    z-index: 10;
    opacity: 0;
    animation: fadeInOut 6s ease forwards;
}

.tip-icon {
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--text-secondary);
    border-radius: 50%;
    position: relative;
}

.tip-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: heartBeat 1.8s infinite;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translate(-50%, 10px); }
    15% { opacity: 0.7; transform: translate(-50%, 0); }
    85% { opacity: 0.7; }
    100% { opacity: 0; pointer-events: none; }
}

@keyframes heartBeat {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.4); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.5; }
}

/* ==========================================
   响应式设计与大屏适配
   ========================================== */

/* 宽屏大屏 (演讲模式) */
@media (min-width: 1200px) {
    .main-title {
        font-size: 4.2rem;
    }
    .sub-title {
        font-size: 1.8rem;
    }
}

/* 手机竖屏适配 */
@media (max-width: 768px) {
    .slide {
        padding: 0 6%;
    }
    .main-title {
        font-size: 1.7rem; /* 适当调小，契合苹果发布会的克制精致感 */
        letter-spacing: 0.04em;
        margin-bottom: 1.2rem;
        line-height: 1.35;
        word-break: normal; 
        overflow-wrap: break-word;
    }
    .sub-title {
        font-size: 0.95rem;
        line-height: 1.55;
        letter-spacing: 0.02em;
        padding: 0 4%;
    }
    .en-title {
        font-size: 0.65rem; /* 手机端较细致的英文批注效果 */
        letter-spacing: 0.15em;
        margin-top: 1.2rem;
        padding: 0 6%;
        line-height: 1.4;
        opacity: 0.55;
    }
    
    /* 第9页移动端微调 */
    .slide-climax .pre-title {
        font-size: 0.8rem;
    }
    .slide-climax .climax-title {
        font-size: 1.8rem;
        letter-spacing: 0.06em;
        word-break: normal;
        overflow-wrap: break-word;
        line-height: 1.3;
    }
    .slide-climax .climax-sub-title {
        font-size: 1.05rem;
        margin-bottom: 1.8rem;
        word-break: normal;
        overflow-wrap: break-word;
    }
    .info-footer {
        flex-direction: column;
        gap: 0.4rem;
        font-size: 0.8rem;
    }
    .info-footer .divider {
        display: none;
    }
    
    /* 演讲者控制面板 - 移动端全宽贴合 */
    .presenter-panel {
        width: 100%;
        border-radius: 16px 16px 0 0;
        left: 0;
        transform: translateZ(0);
    }
    .presenter-panel.open {
        bottom: 0;
    }
    .panel-body {
        padding: 16px;
    }
    .prompt-text {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    .next-preview {
        padding-top: 12px;
        margin-bottom: 16px;
        font-size: 0.8rem;
    }
    .ctrl-btn {
        padding: 11px 14px;
        font-size: 0.85rem;
    }
}

/* 折叠屏/矮屏幕适配 (比如手机横屏) */
@media (max-height: 500px) and (orientation: landscape) {
    .main-title {
        font-size: 1.8rem;
        margin-bottom: 0.8rem;
    }
    .sub-title {
        font-size: 1rem;
    }
    .presentation-footer {
        height: 50px;
    }
}