/* ==================== 基础设置 ==================== */
:root {
    /* 中国传统色彩 */
    --ink-black: #1a1a1a;
    --ink-dark: #2d2d2d;
    --ink-medium: #4a4a4a;
    --ink-light: #6b6b6b;
    --paper-white: #f5f0e6;
    --paper-cream: #ebe5d8;
    --paper-dark: #d9d0c0;
    --vermilion: #c94043;
    --vermilion-dark: #a33135;
    --indigo: #2e4a62;
    --indigo-light: #4a6a8a;
    --gold: #c9a857;
    --gold-light: #ddc07a;
    --jade: #5a8a6e;
    --jade-light: #7ab08a;
    
    /* 渐变 */
    --gradient-vermilion: linear-gradient(135deg, var(--vermilion) 0%, var(--vermilion-dark) 100%);
    --gradient-ink: linear-gradient(180deg, var(--ink-black) 0%, var(--ink-dark) 100%);
    --gradient-paper: linear-gradient(180deg, var(--paper-white) 0%, var(--paper-cream) 100%);
    
    /* 字体 */
    --font-title: 'Ma Shan Zheng', 'STKaiti', 'KaiTi', serif;
    --font-body: 'Noto Serif SC', 'STSong', 'SimSun', serif;
    
    /* 阴影 */
    --shadow-soft: 0 4px 20px rgba(26, 26, 26, 0.1);
    --shadow-medium: 0 8px 40px rgba(26, 26, 26, 0.15);
    --shadow-strong: 0 12px 60px rgba(26, 26, 26, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--paper-cream);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--ink-black);
    position: relative;
}

/* ==================== 背景装饰 ==================== */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.ink-wash {
    position: absolute;
    top: -50%;
    right: -30%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse at center, rgba(45, 45, 45, 0.03) 0%, transparent 70%);
    transform: rotate(-15deg);
}

.mountain {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(180deg, transparent 0%, rgba(46, 74, 98, 0.05) 100%);
    clip-path: polygon(0 100%, 0 60%, 10% 50%, 25% 55%, 40% 45%, 55% 50%, 70% 40%, 85% 48%, 100% 35%, 100% 100%);
}

.bamboo {
    position: absolute;
    width: 3px;
    background: linear-gradient(180deg, transparent, rgba(90, 138, 110, 0.15), rgba(90, 138, 110, 0.1), transparent);
}

.bamboo-1 {
    left: 5%;
    top: 20%;
    height: 60%;
}

.bamboo-2 {
    left: 8%;
    top: 30%;
    height: 50%;
}

.cloud {
    position: absolute;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    animation: floatCloud 20s ease-in-out infinite;
}

.cloud-1 {
    width: 200px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.cloud-2 {
    width: 150px;
    height: 60px;
    top: 25%;
    right: 15%;
    animation-delay: -7s;
}

.cloud-3 {
    width: 180px;
    height: 70px;
    top: 60%;
    left: 20%;
    animation-delay: -14s;
}

@keyframes floatCloud {
    0%, 100% { transform: translateX(0) translateY(0); }
    50% { transform: translateX(20px) translateY(-10px); }
}

/* ==================== 容器 ==================== */
.container {
    position: relative;
    z-index: 1;
    max-width: 580px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* ==================== 头部标题 ==================== */
header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 20px;
}

.title-wrapper {
    position: relative;
    display: inline-block;
}

.seal {
    position: absolute;
    top: -10px;
    right: -30px;
    width: 45px;
    height: 45px;
    background: var(--vermilion);
    border: 2px solid var(--vermilion-dark);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-size: 1.4rem;
    color: var(--paper-white);
    transform: rotate(8deg);
    box-shadow: 2px 2px 8px rgba(201, 64, 67, 0.3);
}

header h1 {
    font-family: var(--font-title);
    font-size: 3.2rem;
    color: var(--ink-black);
    letter-spacing: 0.2em;
    text-shadow: 2px 2px 0 var(--paper-dark);
    position: relative;
}

.subtitle-wrapper {
    position: relative;
    margin-top: 10px;
}

.brush-stroke {
    display: block;
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--ink-light), var(--ink-medium), var(--ink-light), transparent);
    margin: 0 auto 8px;
}

.subtitle {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--ink-light);
    letter-spacing: 0.3em;
}

/* ==================== 屏幕控制 ==================== */
.screen {
    animation: fadeInUp 0.5s ease;
}

.hidden {
    display: none !important;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 卡片通用样式 ==================== */
.card {
    background: var(--paper-white);
    border-radius: 4px;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-vermilion);
}

/* ==================== 卷轴卡片（主菜单） ==================== */
.scroll-card {
    background: transparent;
    box-shadow: none;
    border-radius: 0;
}

.scroll-card::before {
    display: none;
}

.scroll-top, .scroll-bottom {
    height: 25px;
    background: var(--gradient-ink);
    border-radius: 12px;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.scroll-top::after, .scroll-bottom::after {
    content: '';
    position: absolute;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--gold);
    top: 50%;
    transform: translateY(-50%);
}

.scroll-content {
    background: var(--paper-white);
    padding: 30px 25px;
    border-left: 3px solid var(--ink-dark);
    border-right: 3px solid var(--ink-dark);
    position: relative;
}

.scroll-content::before,
.scroll-content::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 20px;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 8px,
        var(--paper-dark) 8px,
        var(--paper-dark) 10px
    );
    opacity: 0.3;
}

.scroll-content::before { top: 0; }
.scroll-content::after { bottom: 0; }

/* 规则头部 */
.rules-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
}

.rules-header h2 {
    font-family: var(--font-title);
    font-size: 1.8rem;
    color: var(--ink-black);
    letter-spacing: 0.15em;
}

.decoration-left, .decoration-right {
    color: var(--vermilion);
    font-size: 0.8rem;
}

/* 规则内容 */
.rules-content {
    margin-bottom: 30px;
}

.rule-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: var(--paper-cream);
    border-radius: 4px;
    margin-bottom: 10px;
    border-left: 3px solid var(--jade);
}

.rule-icon {
    font-size: 1.2rem;
}

.rule-text {
    color: var(--ink-dark);
    font-size: 1rem;
}

.rule-text strong {
    color: var(--vermilion);
    font-weight: 600;
}

/* ==================== 按钮样式 ==================== */
.btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 16px 24px;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
}

.btn-text {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-vermilion);
    color: var(--paper-white);
    box-shadow: 0 4px 15px rgba(201, 64, 67, 0.3);
}

.btn-primary::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-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(201, 64, 67, 0.4);
}

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

.btn-secondary {
    background: transparent;
    color: var(--ink-dark);
    border: 2px solid var(--ink-medium);
}

.btn-secondary:hover {
    background: var(--ink-black);
    color: var(--paper-white);
    border-color: var(--ink-black);
}

.btn-submit {
    background: var(--gradient-vermilion);
    color: var(--paper-white);
    padding: 14px 30px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(201, 64, 67, 0.3);
}

.btn-submit:hover {
    transform: scale(1.02);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-text {
    background: transparent;
    color: var(--ink-light);
    padding: 12px;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
}

.btn-text:hover {
    color: var(--ink-black);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ==================== 游戏界面 ==================== */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

/* 得分显示 */
.score-display {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--paper-white);
    padding: 10px 20px;
    border-radius: 4px;
    box-shadow: var(--shadow-soft);
    border-left: 3px solid var(--vermilion);
}

.score-icon {
    width: 36px;
    height: 36px;
    background: var(--vermilion);
    color: var(--paper-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-size: 1.1rem;
}

.score-info {
    display: flex;
    flex-direction: column;
}

.score-label {
    font-size: 0.75rem;
    color: var(--ink-light);
}

.score-value {
    font-family: var(--font-title);
    font-size: 1.6rem;
    color: var(--ink-black);
    line-height: 1;
}

/* 计时器 */
.timer-display {
    position: relative;
}

.timer-dial {
    width: 70px;
    height: 70px;
    position: relative;
}

.timer-dial svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.timer-bg {
    fill: none;
    stroke: var(--paper-dark);
    stroke-width: 6;
}

.timer-progress {
    fill: none;
    stroke: var(--vermilion);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
}

.timer-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink-black);
}

.timer-display.warning .timer-progress {
    stroke: var(--vermilion);
    animation: timerPulse 1s ease-in-out infinite;
}

.timer-display.warning .timer-text {
    color: var(--vermilion);
    animation: timerPulse 1s ease-in-out infinite;
}

@keyframes timerPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==================== 题目卡片 ==================== */
.question-card {
    background: var(--paper-white);
    padding: 0;
    overflow: visible;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--ink-black);
    color: var(--paper-white);
}

.question-label {
    font-family: var(--font-title);
    font-size: 1.1rem;
    letter-spacing: 0.1em;
}

.answered-count {
    font-size: 0.85rem;
    opacity: 0.8;
}

.question-body {
    padding: 30px 25px;
    background: var(--paper-cream);
    position: relative;
}

.question-body::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 15px;
    font-family: var(--font-title);
    font-size: 3rem;
    color: var(--paper-dark);
    opacity: 0.5;
    line-height: 1;
}

.question-scroll {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#question-text {
    font-family: var(--font-body);
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--ink-black);
    text-align: center;
}

/* 答题区域 */
.answer-section {
    display: flex;
    gap: 12px;
    padding: 20px;
    background: var(--paper-white);
    border-top: 1px solid var(--paper-dark);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper input {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font-body);
    font-size: 1.1rem;
    background: var(--paper-cream);
    border: 2px solid var(--paper-dark);
    border-radius: 4px;
    color: var(--ink-black);
    outline: none;
    transition: all 0.3s ease;
}

.input-wrapper input:focus {
    border-color: var(--vermilion);
    background: var(--paper-white);
}

.input-wrapper input:disabled {
    background: var(--paper-dark);
    opacity: 0.7;
}

.input-wrapper input::placeholder {
    color: var(--ink-light);
}

/* ==================== 反馈信息 ==================== */
.feedback {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    animation: feedbackIn 0.3s ease;
}

@keyframes feedbackIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feedback.correct {
    background: linear-gradient(90deg, transparent, rgba(90, 138, 110, 0.15), transparent);
    color: var(--jade);
}

.feedback.correct .feedback-icon::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--jade);
    color: white;
    border-radius: 50%;
    font-size: 1rem;
}

.feedback.wrong {
    background: linear-gradient(90deg, transparent, rgba(201, 64, 67, 0.1), transparent);
    color: var(--vermilion);
}

.feedback.wrong .feedback-icon::before {
    content: '✗';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--vermilion);
    color: white;
    border-radius: 50%;
    font-size: 1rem;
}

.feedback-text {
    font-weight: 600;
}

/* ==================== 结果页面 ==================== */
.result-card {
    padding: 0;
}

.result-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 25px;
    background: var(--ink-black);
    color: var(--paper-white);
}

.result-seal {
    width: 50px;
    height: 50px;
    background: var(--vermilion);
    border: 2px solid var(--vermilion-dark);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-size: 1.5rem;
    margin-bottom: 10px;
    transform: rotate(-5deg);
}

.result-header h2 {
    font-family: var(--font-title);
    font-size: 1.6rem;
    letter-spacing: 0.2em;
}

.result-body {
    padding: 30px 25px;
}

/* 最终得分圆环 */
.final-score-display {
    display: flex;
    justify-content: center;
    margin-bottom: 15px;
}

.score-circle {
    width: 160px;
    height: 160px;
    position: relative;
}

.score-circle svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.score-circle-bg {
    fill: none;
    stroke: var(--paper-dark);
    stroke-width: 8;
}

.score-circle-progress {
    fill: none;
    stroke: var(--vermilion);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565;
    stroke-dashoffset: 565;
    transition: stroke-dashoffset 1.5s ease;
}

.score-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.final-score-number {
    font-family: var(--font-title);
    font-size: 3.5rem;
    color: var(--vermilion);
    line-height: 1;
    display: block;
}

.final-score-label {
    font-size: 1rem;
    color: var(--ink-light);
}

.result-info {
    text-align: center;
    color: var(--ink-light);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

/* 提交表单 */
.submit-section {
    border-top: 1px dashed var(--paper-dark);
    padding-top: 25px;
}

.submit-section h3 {
    text-align: center;
    font-family: var(--font-title);
    font-size: 1.3rem;
    color: var(--ink-black);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--ink-light);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    font-family: var(--font-body);
    font-size: 1rem;
    background: var(--paper-cream);
    border: 2px solid var(--paper-dark);
    border-radius: 4px;
    color: var(--ink-black);
    outline: none;
    transition: all 0.3s ease;
}

.form-group input:focus {
    border-color: var(--vermilion);
    background: var(--paper-white);
}

.message {
    text-align: center;
    margin-top: 12px;
    padding: 10px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.message.success {
    background: rgba(90, 138, 110, 0.15);
    color: var(--jade);
}

.message.error {
    background: rgba(201, 64, 67, 0.1);
    color: var(--vermilion);
}

.result-footer {
    display: flex;
    gap: 12px;
    padding: 20px 25px;
    background: var(--paper-cream);
    border-top: 1px solid var(--paper-dark);
}

.result-footer .btn {
    flex: 1;
}

/* ==================== 排行榜 ==================== */
.leaderboard-card {
    padding: 0;
}

.leaderboard-header {
    padding: 25px;
    background: var(--ink-black);
    color: var(--paper-white);
    text-align: center;
}

.leaderboard-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.trophy-icon {
    font-size: 1.8rem;
}

.leaderboard-header h2 {
    font-family: var(--font-title);
    font-size: 1.8rem;
    letter-spacing: 0.2em;
}

.leaderboard-subtitle {
    margin-top: 8px;
    font-size: 0.85rem;
    opacity: 0.7;
    letter-spacing: 0.1em;
}

.leaderboard-content {
    max-height: 50vh;
    overflow-y: auto;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 50px;
    color: var(--ink-light);
    gap: 15px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--paper-dark);
    border-top-color: var(--vermilion);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.no-data {
    text-align: center;
    padding: 50px;
    color: var(--ink-light);
}

/* 排行榜表格 */
.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

.leaderboard-table th {
    padding: 12px 15px;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ink-light);
    background: var(--paper-cream);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.leaderboard-table td {
    padding: 14px 15px;
    border-bottom: 1px solid var(--paper-dark);
    vertical-align: middle;
}

.leaderboard-table tr:last-child td {
    border-bottom: none;
}

.leaderboard-table tr:hover td {
    background: var(--paper-cream);
}

.rank-cell {
    text-align: center;
    width: 50px;
}

.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.rank-1 .rank-badge {
    background: linear-gradient(135deg, #ffd700, #ffed4a);
    color: #8b6914;
}

.rank-2 .rank-badge {
    background: linear-gradient(135deg, #c0c0c0, #e8e8e8);
    color: #666;
}

.rank-3 .rank-badge {
    background: linear-gradient(135deg, #cd7f32, #daa06d);
    color: #5c3d1e;
}

.rank-other .rank-badge {
    background: var(--paper-dark);
    color: var(--ink-light);
}

.nickname-cell {
    font-weight: 600;
    color: var(--ink-black);
}

.score-cell {
    text-align: center;
}

.score-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.95rem;
}

.score-tag.top3 {
    background: var(--ink-black);
    color: var(--gold);
}

.score-tag.normal {
    background: var(--paper-cream);
    color: var(--ink-dark);
}

.time-cell {
    text-align: right;
    font-size: 0.8rem;
    color: var(--ink-light);
}

.leaderboard-actions {
    display: flex;
    gap: 12px;
    margin-top: 15px;
}

.leaderboard-actions .btn {
    flex: 1;
}

/* ==================== 页脚 ==================== */
footer {
    text-align: center;
    margin-top: 50px;
    padding-bottom: 30px;
}

.footer-content {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 12px 25px;
    background: var(--paper-white);
    border-radius: 30px;
    box-shadow: var(--shadow-soft);
}

.footer-decoration {
    color: var(--vermilion);
    font-size: 0.6rem;
}

.footer-content span:not(.footer-decoration) {
    font-size: 0.85rem;
    color: var(--ink-light);
    letter-spacing: 0.1em;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 2.4rem;
        letter-spacing: 0.15em;
    }

    .seal {
        width: 38px;
        height: 38px;
        font-size: 1.2rem;
        right: -25px;
        top: -8px;
    }

    .scroll-content {
        padding: 25px 20px;
    }

    .rules-header h2 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 14px 20px;
        font-size: 1rem;
    }

    .question-header {
        padding: 12px 15px;
    }

    .question-body {
        padding: 25px 20px;
    }

    #question-text {
        font-size: 1.15rem;
    }

    .answer-section {
        flex-direction: column;
        padding: 15px;
    }

    .answer-section .btn {
        width: 100%;
    }

    .score-circle {
        width: 140px;
        height: 140px;
    }

    .final-score-number {
        font-size: 3rem;
    }

    .result-footer {
        flex-direction: column;
    }

    .leaderboard-actions {
        flex-direction: column;
    }

    .game-header {
        gap: 10px;
    }

    .score-display {
        padding: 8px 15px;
    }

    .timer-dial {
        width: 60px;
        height: 60px;
    }
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--paper-cream);
}

::-webkit-scrollbar-thumb {
    background: var(--ink-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--ink-medium);
}