/* ========================================
   StageQuiz 首页 - 科技感 Landing Page
   ======================================== */

/* 基础布局 */
html {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    width: 100%;
    height: 100%;
    overflow: auto;
    position: relative;
    color: var(--text-primary);
}

/* 粒子背景容器 */
#particles-js {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    position: fixed;
    z-index: 0;
}

#particles-js canvas {
    width: 100% !important;
    height: 100% !important;
}

/* 主内容区域 */
.hero-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

/* 标题区域 */
.title-section {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.main-title {
    font-size: clamp(0.85rem, 3.2vw, 1.15rem);
    font-weight: 700;
    letter-spacing: 0.05em;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 90vw;
    background: linear-gradient(
        135deg,
        var(--color-primary-light) 0%,
        var(--color-primary) 50%,
        var(--color-primary-light) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    filter: drop-shadow(0 0 40px var(--color-primary-glow));
}

/* 标题光晕由 .main-title 的 drop-shadow 滤镜提供，不再使用 ::after 伪元素避免硬编码文本 */

.subtitle {
    font-size: clamp(0.75rem, 2.5vw, 1rem);
    color: var(--text-secondary);
    letter-spacing: 0.15em;
    font-weight: 300;
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
    animation-delay: 0.6s;
}

/* 装饰光线 */
.light-decoration {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(90vw, 600px);
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-primary-glow) 20%,
        var(--color-primary-light) 50%,
        var(--color-primary-glow) 80%,
        transparent 100%
    );
    opacity: 0.6;
    z-index: 5;
    pointer-events: none;
}

.light-decoration::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 4px;
    background: var(--color-primary-light);
    border-radius: 4px;
    box-shadow: 
        0 0 10px var(--color-primary-light),
        0 0 20px var(--color-primary-glow),
        0 0 40px var(--color-primary-glow);
    animation: lightPulse 2s ease-in-out infinite;
}

/* 按钮区域 */
.cta-section {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.btn-start {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-2xl);
    min-width: 200px;
    font-size: clamp(1rem, 3vw, 1.25rem);
    font-weight: 500;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 
        var(--glow-sm),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: glowPulse 2s ease-in-out infinite;
    overflow: hidden;
}

.btn-start::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.5s ease;
}

.btn-start:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 
        var(--glow-lg),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border-color: var(--color-primary-light);
}

.btn-start:hover::before {
    left: 100%;
}

.btn-start:active {
    transform: translateY(-1px) scale(0.98);
}

/* 箭头装饰 */
.arrow-decoration {
    position: fixed;
    bottom: 80px;
    height: 60px;
    opacity: 0.4;
    z-index: 5;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.arrow-decoration.left {
    left: 5%;
    transform: translateX(-60%);
}

.arrow-decoration.right {
    right: 5%;
    transform: translateX(60%) rotateZ(180deg);
}

/* 底部信息区 */
.info-section {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 10;
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
    animation-delay: 1.2s;
}

.info-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

.info-link:hover {
    color: var(--color-primary-light);
    background: var(--glass-bg);
}

.info-link i {
    font-size: var(--font-size-base);
}

/* ===== 弹窗 - 科技感设计 ===== */
#dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

#dialog.show {
    opacity: 1;
    visibility: visible;
}

#dialog.hide {
    display: none;
}

#dialog_content {
    position: relative;
    width: min(90vw, 420px);
    max-height: 80vh;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    box-shadow:
        var(--glass-shadow),
        0 0 40px rgba(59, 130, 246, 0.1);
    padding: var(--spacing-2xl) var(--spacing-xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#dialog.show #dialog_content {
    transform: scale(1) translateY(0);
}

/* 顶部渐变光条 */
.dialog-glow-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-primary) 20%,
        var(--color-primary-light) 50%,
        var(--color-primary) 80%,
        transparent 100%
    );
    animation: barShimmer 3s ease-in-out infinite;
}

@keyframes barShimmer {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* 弹窗头部 */
.dialog-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.dialog-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary-light), transparent);
}

.dialog-header-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.25);
    color: var(--color-primary-light);
    animation: iconPulse 2.5s ease-in-out infinite;
}

.dialog-header-icon svg {
    width: 20px;
    height: 20px;
}

@keyframes iconPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.2); }
    50% { box-shadow: 0 0 15px 5px rgba(59, 130, 246, 0.1); }
}

.dialog-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 0.1em;
}

/* 规则列表 */
.dialog-rules {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.dialog-rule {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-left: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateX(-10px);
    animation: ruleSlideIn 0.4s ease forwards;
}

.dialog-rule:nth-child(1) { animation-delay: 0.1s; }
.dialog-rule:nth-child(2) { animation-delay: 0.2s; }
.dialog-rule:nth-child(3) { animation-delay: 0.3s; }
.dialog-rule:nth-child(4) { animation-delay: 0.4s; }

@keyframes ruleSlideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.dialog-rule:hover {
    background: rgba(59, 130, 246, 0.06);
    border-left-color: var(--color-primary-light);
    transform: translateX(4px);
}

.rule-badge {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--color-primary-light);
}

.rule-badge svg {
    width: 16px;
    height: 16px;
}

.rule-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-top: 2px;
}

.rule-text strong {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.rule-text span {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 关闭按钮 */
#dialog_close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 10;
}

#dialog_close svg {
    width: 14px;
    height: 14px;
}

#dialog_close:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--color-error);
    transform: rotate(90deg);
}

/* 滚动条 */
.box::-webkit-scrollbar {
    width: 4px;
}

.box::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
}

.box::-webkit-scrollbar-thumb {
    background: var(--color-primary-glow);
    border-radius: 2px;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 
            var(--glow-sm),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
    50% {
        box-shadow: 
            var(--glow-md),
            inset 0 1px 0 rgba(255, 255, 255, 0.15);
    }
}

@keyframes lightPulse {
    0%, 100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scaleX(1);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scaleX(1.1);
    }
}

@keyframes arrowMove {
    0% {
        transform: translateX(-60%);
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        transform: translateX(20%);
        opacity: 0.3;
    }
}

@keyframes arrowMoveReverse {
    0% {
        transform: translateX(60%) rotateZ(180deg);
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        transform: translateX(-20%) rotateZ(180deg);
        opacity: 0.3;
    }
}

/* 箭头动画 */
.arrow-decoration.left {
    animation: arrowMove 3s ease-in-out infinite;
}

.arrow-decoration.right {
    animation: arrowMoveReverse 3s ease-in-out infinite;
}

/* 响应式 */
@media (max-width: 768px) {
    /* 与 PC 一致：上下拉开，不再挤在中间 */
    .hero-container {
        padding: var(--spacing-lg);
        justify-content: space-evenly;
    }

    .title-section {
        margin-bottom: 0;
    }

    /* 标题放大，长标题允许换行（默认 nowrap + 省略号会截断） */
    .main-title {
        font-size: 1.75rem;
        white-space: normal;
        overflow: visible;
        text-overflow: clip;
        max-width: 92vw;
        line-height: 1.4;
        letter-spacing: 0.08em;
        margin-bottom: var(--spacing-lg);
    }

    .subtitle {
        font-size: 0.95rem;
        letter-spacing: 0.2em;
        line-height: 2.2;
    }

    .btn-start {
        padding: 16px 48px;
        font-size: 1.125rem;
        min-width: 220px;
    }

    .light-decoration {
        width: 86vw;
        top: 60%;
    }

    .arrow-decoration {
        height: 40px;
    }

    .info-section {
        bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 1.4rem;
        letter-spacing: 0.05em;
    }

    .subtitle {
        font-size: 0.85rem;
        letter-spacing: 0.1em;
    }

    .btn-start {
        padding: 14px 40px;
        font-size: 1rem;
        min-width: 200px;
    }

    #dialog_content {
        padding: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .hero-container {
        justify-content: space-evenly;
    }

    .title-section {
        margin-bottom: 0;
    }

    .main-title {
        font-size: 3.5rem;
        max-width: 1200px;
        line-height: 1.25;
        margin-bottom: var(--spacing-xl);
    }

    .subtitle {
        font-size: 1.5rem;
        letter-spacing: 0.25em;
        line-height: 2;
    }

    .btn-start {
        padding: 20px 72px;
        font-size: 1.5rem;
        min-width: 300px;
    }

    .light-decoration {
        width: min(70vw, 900px);
        top: 60%;
    }

    .arrow-decoration {
        height: 72px;
    }

    #dialog_content {
        width: min(85vw, 560px);
        padding: 56px 48px;
    }

    .dialog-header h2 {
        font-size: var(--font-size-xl);
    }

    .dialog-rule {
        padding: var(--spacing-lg);
    }

    .rule-text strong {
        font-size: var(--font-size-base);
    }

    .rule-text span {
        font-size: var(--font-size-sm);
    }
}

@media (min-width: 1440px) {
    .main-title {
        font-size: 4.5rem;
        max-width: 1400px;
    }

    .subtitle {
        font-size: 1.75rem;
    }

    .btn-start {
        padding: 24px 88px;
        font-size: 1.625rem;
        min-width: 340px;
    }

    #dialog_content {
        width: min(75vw, 640px);
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}