/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    animation: containerFadeIn 1s ease-out;
}

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

/* 头部 */
.header {
    text-align: center;
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 30px;
    border-radius: 25px;
    box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(20px);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(255, 107, 107, 0.1), 
        rgba(78, 205, 196, 0.1), 
        rgba(69, 183, 209, 0.1), 
        rgba(150, 206, 180, 0.1)
    );
    animation: headerShimmer 4s ease-in-out infinite;
    z-index: -1;
}

@keyframes headerShimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

.header-icon {
    font-size: 4em;
    margin-bottom: 15px;
    animation: rainbowBounce 3s ease-in-out infinite;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.8);
}

@keyframes rainbowBounce {
    0%, 100% { 
        transform: translateY(0) scale(1); 
        filter: hue-rotate(0deg);
    }
    25% { 
        transform: translateY(-10px) scale(1.05); 
        filter: hue-rotate(90deg);
    }
    50% { 
        transform: translateY(-15px) scale(1.1); 
        filter: hue-rotate(180deg);
    }
    75% { 
        transform: translateY(-5px) scale(1.05); 
        filter: hue-rotate(270deg);
    }
}

.title {
    font-size: 3.2em;
    font-weight: 800;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57, #ff9ff3);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbowText 3s ease-in-out infinite;
    margin-bottom: 10px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    letter-spacing: 2px;
}

@keyframes rainbowText {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.subtitle {
    font-size: 1.3em;
    color: #34495e;
    margin-bottom: 25px;
    font-weight: 600;
    opacity: 0.9;
}

/* 标签切换 */
.tab-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.tab-btn {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    border: 2px solid transparent;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #2c3e50;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

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

.tab-btn.active {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.tab-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.tab-icon {
    font-size: 1.2em;
    transition: transform 0.3s ease;
}

.tab-btn:hover .tab-icon {
    transform: scale(1.2) rotate(10deg);
}

.update-time {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #34495e;
    font-size: 1em;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: rgba(52, 73, 94, 0.1);
    border-radius: 25px;
    display: inline-flex;
    backdrop-filter: blur(5px);
}

.time-icon {
    font-size: 1.2em;
    animation: tick 2s infinite;
}

@keyframes tick {
    0%, 50% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-20deg); }
}

.refresh-btn {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4, #45b7d1);
    background-size: 200% 200%;
    color: white;
    border: none;
    padding: 15px 35px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 700;
    transition: all 0.4s ease;
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
    animation: buttonRainbow 3s ease-in-out infinite;
}

@keyframes buttonRainbow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.refresh-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.6s ease;
}

.refresh-btn:hover::before {
    width: 300px;
    height: 300px;
}

.refresh-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.5);
}

.btn-icon {
    font-size: 1.3em;
    transition: transform 0.4s ease;
}

.refresh-btn:hover .btn-icon {
    transform: rotate(360deg);
}

/* 彩虹加载动画 */
.loading {
    text-align: center;
    padding: 70px 40px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 25px;
    margin-bottom: 25px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(20px);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

.rainbow-spinner {
    width: 60px;
    height: 60px;
    border: 6px solid transparent;
    border-radius: 50%;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57, #ff9ff3) border-box;
    background-clip: padding-box;
    position: relative;
    animation: rainbowSpin 2s linear infinite;
}

.rainbow-spinner::before {
    content: '';
    position: absolute;
    top: -6px;
    left: -6px;
    right: -6px;
    bottom: -6px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57, #ff9ff3);
    border-radius: 50%;
    z-index: -1;
    animation: rainbowSpin 2s linear infinite reverse;
}

@keyframes rainbowSpin {
    0% { transform: rotate(0deg); filter: hue-rotate(0deg); }
    100% { transform: rotate(360deg); filter: hue-rotate(360deg); }
}

.loading-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.loading-emoji {
    font-size: 3em;
    animation: rocketPulse 1.5s ease-in-out infinite alternate;
}

@keyframes rocketPulse {
    0% { transform: scale(1) rotate(-10deg); }
    100% { transform: scale(1.2) rotate(10deg); }
}

.loading-text p {
    font-size: 1.2em;
    color: #34495e;
    font-weight: 600;
    margin: 0;
}

.loading-dots {
    display: flex;
    gap: 8px;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: dotRainbow 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { 
    background: #ff6b6b;
    animation-delay: -0.32s; 
}
.loading-dots span:nth-child(2) { 
    background: #4ecdc4;
    animation-delay: -0.16s; 
}
.loading-dots span:nth-child(3) { 
    background: #45b7d1;
    animation-delay: 0s; 
}

@keyframes dotRainbow {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40% { transform: scale(1.3); opacity: 1; }
}

/* 新闻列表 */
.news-list {
    display: grid;
    gap: 25px;
    animation: listFadeIn 0.8s ease-out;
}

@keyframes listFadeIn {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.news-item {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid transparent;
    backdrop-filter: blur(15px);
    position: relative;
    overflow: hidden;
    animation: itemSlideIn 0.6s ease-out;
    animation-fill-mode: both;
}

.news-item:nth-child(odd) {
    animation-delay: 0.1s;
}

.news-item:nth-child(even) {
    animation-delay: 0.2s;
}

@keyframes itemSlideIn {
    from {
        opacity: 0;
        transform: translateX(-60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.news-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(to bottom, #ff6b6b, #4ecdc4, #45b7d1);
    transform: scaleY(0);
    transition: transform 0.4s ease;
}

.news-item:hover::before {
    transform: scaleY(1);
}

.news-item:hover {
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.12);
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(255, 107, 107, 0.3);
}

.news-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
}

.news-rank {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    min-width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1em;
    flex-shrink: 0;
    position: relative;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
    animation: rankGlow 3s ease-in-out infinite;
}

@keyframes rankGlow {
    0%, 100% { 
        box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    }
    33% { 
        box-shadow: 0 4px 20px rgba(78, 205, 196, 0.4);
        background: linear-gradient(135deg, #4ecdc4, #45b7d1);
    }
    66% { 
        box-shadow: 0 4px 20px rgba(69, 183, 209, 0.4);
        background: linear-gradient(135deg, #45b7d1, #96ceb4);
    }
}

.news-rank.top-5 {
    background: linear-gradient(135deg, #feca57, #ff9ff3, #54a0ff);
    animation: topRankGlow 2s ease-in-out infinite alternate;
}

@keyframes topRankGlow {
    0% { 
        box-shadow: 0 4px 20px rgba(254, 202, 87, 0.5);
        transform: scale(1);
    }
    100% { 
        box-shadow: 0 6px 30px rgba(255, 159, 243, 0.6), 0 0 40px rgba(84, 160, 255, 0.3);
        transform: scale(1.05);
    }
}

.news-rank.top-5::before {
    content: '⭐';
    position: absolute;
    top: -10px;
    right: -8px;
    font-size: 0.8em;
    animation: starTwinkle 1s ease-in-out infinite alternate;
}

@keyframes starTwinkle {
    0% { transform: translateY(0) rotate(-10deg) scale(1); }
    100% { transform: translateY(-3px) rotate(10deg) scale(1.1); }
}

.news-score {
    background: linear-gradient(135deg, #ff6b6b, #feca57);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 1em;
    box-shadow: 0 3px 10px rgba(255, 107, 107, 0.3);
    animation: scoreFloat 2s ease-in-out infinite alternate;
}

@keyframes scoreFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-2px); }
}

.news-title {
    font-size: 1.3em;
    font-weight: 700;
    color: #2c3e50;
    line-height: 1.4;
    margin-bottom: 15px;
    position: relative;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.news-author {
    color: #7f8c8d;
    font-size: 1em;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-author::before {
    content: '👤';
    font-size: 1.1em;
}

.news-time {
    color: #95a5a6;
    font-size: 0.95em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-time::before {
    content: '🕒';
    font-size: 1em;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: white;
    text-decoration: none;
    font-size: 1em;
    font-weight: 600;
    padding: 12px 24px;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    background-size: 200% 200%;
    border-radius: 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    animation: linkRainbow 4s ease-in-out infinite;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

@keyframes linkRainbow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.news-link::before {
    content: '🚀';
    font-size: 1.1em;
}

.news-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.news-link:hover::after {
    left: 100%;
}

.news-link:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.5);
}

/* 错误信息 */
.error-message {
    text-align: center;
    padding: 70px 40px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 25px;
    box-shadow: 0 10px 40px rgba(231, 76, 60, 0.1);
    backdrop-filter: blur(20px);
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

.error-icon {
    font-size: 5em;
    animation: errorShake 1.5s ease-in-out infinite alternate;
}

@keyframes errorShake {
    0% { transform: translateX(0) rotate(0deg); }
    25% { transform: translateX(-8px) rotate(-8deg); }
    50% { transform: translateX(8px) rotate(8deg); }
    75% { transform: translateX(-5px) rotate(-5deg); }
    100% { transform: translateX(0) rotate(0deg); }
}

.error-content h3 {
    font-size: 1.8em;
    color: #e74c3c;
    margin: 0;
    font-weight: 700;
}

.error-content p {
    color: #7f8c8d;
    font-size: 1.1em;
    margin: 0;
    line-height: 1.6;
}

.retry-btn {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 700;
    transition: all 0.4s ease;
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.retry-btn:hover {
    background: linear-gradient(135deg, #e74c3c, #3498db);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.5);
    transform: translateY(-3px);
}

.retry-btn span {
    font-size: 1.2em;
    transition: transform 0.4s ease;
}

.retry-btn:hover span {
    transform: rotate(360deg);
}

/* 平板端适配 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .container {
        padding: 25px;
    }
    
    .header {
        padding: 35px 25px;
    }
    
    .header-icon {
        font-size: 3.5em;
    }
    
    .title {
        font-size: 2.8em;
        letter-spacing: 1.5px;
    }
    
    .subtitle {
        font-size: 1.2em;
    }
    
    .news-list {
        grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
        gap: 30px;
    }
    
    .news-item {
        padding: 25px;
    }
    
    .news-rank {
        min-width: 42px;
        height: 42px;
        font-size: 1.05em;
    }
    
    .news-title {
        font-size: 1.25em;
    }
    
    .tab-container {
        gap: 12px;
    }
    
    .tab-btn {
        padding: 10px 20px;
        font-size: 0.95em;
    }
}

/* 电脑端适配 (1025px+) */
@media (min-width: 1025px) {
    .container {
        padding: 40px;
    }
    
    .header {
        padding: 50px 40px;
        margin-bottom: 50px;
    }
    
    .header-icon {
        font-size: 4.5em;
    }
    
    .title {
        font-size: 3.8em;
        letter-spacing: 3px;
    }
    
    .subtitle {
        font-size: 1.4em;
    }
    
    .news-list {
        grid-template-columns: repeat(auto-fit, minmax(550px, 1fr));
        gap: 35px;
    }
    
    .news-item {
        padding: 35px;
    }
    
    .news-rank {
        min-width: 50px;
        height: 50px;
        font-size: 1.2em;
    }
    
    .news-title {
        font-size: 1.4em;
    }
    
    .news-meta {
        gap: 25px;
    }
    
    .news-author {
        font-size: 1.05em;
    }
    
    .news-time {
        font-size: 1em;
    }
    
    .news-link {
        font-size: 1.05em;
        padding: 14px 28px;
    }
    
    /* 电脑端特殊效果 */
    .news-item:hover {
        transform: translateY(-10px) scale(1.03);
    }
    
    .tab-btn {
        padding: 14px 28px;
        font-size: 1.05em;
    }
}

/* 手机端适配 (767px以下) */
@media (max-width: 767px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 25px 20px;
        margin-bottom: 25px;
    }
    
    .header-icon {
        font-size: 2.8em;
    }
    
    .title {
        font-size: 2.2em;
        letter-spacing: 1px;
    }
    
    .subtitle {
        font-size: 1em;
    }
    
    .tab-container {
        gap: 8px;
        justify-content: center;
    }
    
    .tab-btn {
        padding: 8px 16px;
        font-size: 0.85em;
        flex-direction: column;
        gap: 4px;
    }
    
    .update-time {
        font-size: 0.9em;
        padding: 8px 16px;
    }
    
    .refresh-btn {
        padding: 12px 24px;
        font-size: 0.95em;
    }
    
    .news-item {
        padding: 20px;
        border-radius: 15px;
    }
    
    .news-rank {
        min-width: 38px;
        height: 38px;
        font-size: 0.95em;
    }
    
    .news-title {
        font-size: 1.15em;
        line-height: 1.3;
    }
    
    .news-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .news-author {
        font-size: 0.9em;
    }
    
    .news-time {
        font-size: 0.85em;
    }
    
    .news-link {
        font-size: 0.9em;
        padding: 10px 20px;
        align-self: flex-start;
    }
    
    /* 手机端动画优化 */
    .news-item {
        animation-duration: 0.4s;
    }
    
    .news-item:hover {
        transform: translateY(-3px) scale(1.01);
    }
}

/* 超小屏幕适配 (480px以下) */
@media (max-width: 480px) {
    .container {
        padding: 12px;
    }
    
    .header {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    .header-icon {
        font-size: 2.5em;
    }
    
    .title {
        font-size: 1.9em;
        letter-spacing: 0.5px;
    }
    
    .subtitle {
        font-size: 0.95em;
    }
    
    .tab-container {
        gap: 6px;
    }
    
    .tab-btn {
        padding: 6px 12px;
        font-size: 0.8em;
        min-width: auto;
    }
    
    .tab-icon {
        font-size: 1em;
    }
    
    .update-time {
        font-size: 0.85em;
        padding: 6px 12px;
        flex-direction: column;
        gap: 4px;
    }
    
    .refresh-btn {
        padding: 10px 20px;
        font-size: 0.9em;
    }
    
    .news-list {
        gap: 15px;
    }
    
    .news-item {
        padding: 18px 15px;
        border-radius: 12px;
    }
    
    .news-header {
        gap: 12px;
        margin-bottom: 15px;
    }
    
    .news-rank {
        min-width: 35px;
        height: 35px;
        font-size: 0.9em;
    }
    
    .news-title {
        font-size: 1.05em;
        line-height: 1.25;
    }
    
    .news-meta {
        gap: 8px;
    }
    
    .news-author {
        font-size: 0.85em;
    }
    
    .news-time {
        font-size: 0.8em;
    }
    
    .news-link {
        font-size: 0.85em;
        padding: 8px 16px;
    }
    
    /* 超小屏幕性能优化 */
    .news-item {
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    
    .news-item::before,
    .news-item::after,
    .news-link::after {
        display: none;
    }
    
    .loading-content {
        gap: 15px;
    }
    
    .loading-emoji {
        font-size: 2.5em;
    }
    
    .error-icon {
        font-size: 3.5em;
    }
    
    .error-content h3 {
        font-size: 1.4em;
    }
    
    .error-content p {
        font-size: 0.95em;
    }
}