/* ==================== 文本组件 ==================== */
.page-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-black);
    margin-bottom: 1.25rem;
    line-height: 1.35;
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.page.visible .page-title {
    opacity: 1;
    transform: translateY(0);
}

/* 居中标题（用于第1页） */
.page-title-center {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-black);
    text-align: center;
    width: 100%;
    margin: 0 auto 1.5rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.page.visible .page-title-center {
    opacity: 1;
    transform: translateY(0);
}

/* 命题卡 */
.proposition-card {
    background: var(--primary-blue);
    color: white;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    line-height: 1.6;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    transition-delay: 0.1s;
}

.page.visible .proposition-card {
    opacity: 1;
    transform: translateY(0);
}

/* 场景叙事 */
.scene-narrative {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
}

.scene-narrative p {
    font-size: 0.875rem;
    color: var(--text-gray);
    line-height: 1.7;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.scene-narrative p strong {
    color: var(--primary-blue);
    font-weight: 600;
}

.page.visible .scene-narrative p:nth-child(1) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.2s;
}

.page.visible .scene-narrative p:nth-child(2) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.3s;
}

.page.visible .scene-narrative p:nth-child(3) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.4s;
}

.page.visible .scene-narrative p:nth-child(4) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.5s;
}

.page.visible .scene-narrative p:nth-child(5) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.6s;
}

.page.visible .scene-narrative p:nth-child(6) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.7s;
}

.page.visible .scene-narrative p:nth-child(7) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.8s;
}

.page.visible .scene-narrative p:nth-child(8) {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.9s;
}

/* ==================== 流程图组件 ==================== */
.flow-compare {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    transition-delay: 0.45s;
    border: none;
    outline: none;
}

.page.visible .flow-compare {
    opacity: 1;
    transform: translateY(0);
}

.flow-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.flow-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-light);
    width: 48px;
    flex-shrink: 0;
    text-align: right;
}

.flow-track {
    flex: 1;
    display: flex;
    align-items: center;
    position: relative;
}

/* 生活流 - 连续线 */
.life-flow .flow-track {
    background: linear-gradient(90deg, var(--success-green) 0%, var(--success-green) 100%);
    height: 3px;
    border-radius: 2px;
}

.life-flow .flow-nodes {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 4px;
}

.life-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.life-node-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success-green);
    border: 2px solid white;
    box-shadow: 0 0 0 1px var(--success-green);
}

.life-node-text {
    font-size: 0.625rem;
    color: var(--text-gray);
    white-space: nowrap;
    margin-top: 2px;
}

/* 服务流 - 断裂线 */
.service-flow .flow-track {
    display: flex;
    align-items: center;
    gap: 0;
}

.service-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    position: relative;
}

.service-node-box {
    width: 40px;
    height: 24px;
    border-radius: 4px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.5625rem;
    color: var(--text-gray);
    transition: all 0.12s ease;
}

.service-node-box.flash {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
    box-shadow: 0 0 12px rgba(37, 99, 235, 0.5);
}

/* 起点和里程碑节点样式 */
.service-start .service-node-box {
    background: var(--success-green);
    border-color: var(--success-green);
    color: white;
}

.service-milestone .service-node-box {
    background: var(--bg-white);
    border: 2px solid var(--success-green);
    color: var(--success-green);
    font-weight: 600;
}

/* 断点指示器 */
.break-gap {
    width: 16px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.break-line {
    width: 1px;
    height: 16px;
    background: transparent;
    border-left: none;
    position: relative;
    display: none;
}

.break-mark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 4px;
    background: transparent;
    border-radius: 50%;
    transition: all 0.12s ease;
    display: none;
}

.break-mark.flash {
    background: var(--primary-blue);
    box-shadow: 0 0 6px rgba(37, 99, 235, 0.4);
}

.service-hint {
    margin-top: 10px;
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    transition-delay: 0.6s;
}

.page.visible .service-hint {
    opacity: 1;
}

/* ==================== 封面组件 ==================== */
.cover-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.cover-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--text-black);
    margin-bottom: 1rem;
}

.cover-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.cover-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-blue);
    color: white;
    padding: 10px 24px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .cover-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 640px) {
    .cover-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 1.625rem;
    }
    
    .scene-narrative p {
        font-size: 0.75rem;
    }
}