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

:root {
    --primary: #173926;
    --primary-dark: #0d2618;
    --primary-light: #1e5a3a;
    --gold: #ffd700;
    --gold-light: #ffed4e;
    --red: #ff4444;
    --white: #ffffff;
    --gray: #888888;
    --light-gray: #f5f5f5;
    --text: #333333;
    --text-light: #666666;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--text);
    line-height: 1.8;
    background: #fff;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(23, 57, 38, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 215, 0, 0.2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--gold);
    display: flex;
    align-items: center;
}

.logo .logo-img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(212, 163, 64, 0.4);
    box-shadow: 0 0 8px rgba(212, 163, 64, 0.2);
}

.logo span {
    margin-left: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--gold);
}

.nav-play {
    background: var(--gold);
    color: var(--primary) !important;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
}

.nav-play:hover {
    background: var(--gold-light);
}

.nav-login {
    background: transparent;
    color: var(--gold) !important;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    border: 1px solid var(--gold);
    margin-right: 8px;
    transition: all 0.3s;
}
.nav-login:hover {
    background: rgba(212, 163, 64, 0.1);
    transform: scale(1.05);
}

.rules-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 100px 20px 60px;
}

.rules-header {
    text-align: center;
    padding: 40px 20px 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 0 0 30px 30px;
    margin-bottom: 40px;
}

.rules-header h1 {
    font-size: 36px;
    color: var(--gold);
    margin-bottom: 10px;
}

.rules-header p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

.rule-section {
    margin-bottom: 50px;
}

.rule-section > h2 {
    font-size: 28px;
    color: var(--primary);
    padding-bottom: 15px;
    border-bottom: 3px solid var(--gold);
    margin-bottom: 30px;
}

.card-types {
    margin-bottom: 30px;
}

.card-types h3 {
    font-size: 22px;
    color: var(--primary-light);
    margin-bottom: 15px;
}

.cards-table {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.cards-table .table-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    background: var(--primary);
    color: #fff;
    padding: 15px 20px;
    font-weight: bold;
}

.cards-table .table-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.cards-table .table-row:last-child {
    border-bottom: none;
}

.cards-table .table-row:nth-child(even) {
    background: rgba(23, 57, 38, 0.03);
}

.combo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 25px;
}

.combo-card {
    background: var(--light-gray);
    border-radius: 12px;
    padding: 25px;
    border-left: 4px solid var(--gold);
}

.combo-card h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 15px;
}

.combo-card ul {
    list-style: none;
    padding: 0;
}

.combo-card li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.combo-card li:last-child {
    border-bottom: none;
}

.combo-card strong {
    color: var(--primary);
}

.rule-note {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.rule-note p {
    margin-bottom: 8px;
}

.rule-note strong {
    color: #856404;
}

.rule-block {
    background: var(--light-gray);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
}

.rule-block h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 15px;
}

.rule-block ul,
.rule-block ol {
    padding-left: 20px;
}

.rule-block li {
    margin-bottom: 8px;
}

.score-table {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    margin: 20px 0 15px;
}

.score-table .table-header {
    display: grid;
    grid-template-columns: 1.5fr repeat(6, 1fr);
    background: var(--primary);
    color: #fff;
    padding: 15px 10px;
    font-weight: bold;
    text-align: center;
    font-size: 14px;
}

.score-table .table-row {
    display: grid;
    grid-template-columns: 1.5fr repeat(6, 1fr);
    padding: 12px 10px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    text-align: center;
}

.score-table .table-row:last-child {
    border-bottom: none;
}

.score-table .table-row:nth-child(even) {
    background: rgba(23, 57, 38, 0.03);
}

.table-note {
    color: var(--text-light);
    font-size: 14px;
    margin-top: 10px;
}

.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 20px;
    padding: 50px;
    text-align: center;
    margin: 40px 0;
}

.cta-content h2 {
    font-size: 32px;
    color: var(--gold);
    margin-bottom: 10px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 25px;
}

.btn {
    display: inline-block;
    background: var(--gold);
    color: var(--primary);
    padding: 16px 40px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn:hover {
    background: var(--gold-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.4);
}

.footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 30px 20px;
    text-align: center;
}

.footer-bottom {
    font-size: 13px;
}

/* ========== Hamburger Menu ========== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    background: none;
    border: none;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gold);
    border-radius: 2px;
    transition: all 0.3s;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 768px) {
    .hamburger { display: flex; }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 20px;
        transition: right 0.3s ease;
        z-index: 1000;
        border-left: 1px solid rgba(255, 215, 0, 0.2);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    .nav-menu a {
        font-size: 18px;
    }
    
    .nav-play {
        display: inline-block !important;
        text-align: center;
        padding: 12px 20px !important;
    }
    
    .nav-login {
        display: inline-block !important;
        text-align: center;
        padding: 12px 20px !important;
        margin-right: 0;
    }
    
    .rules-container {
        padding: 80px 15px 40px;
    }
    
    .rules-header h1 {
        font-size: 28px;
    }
    
    .rule-section > h2 {
        font-size: 22px;
    }
    
    .cards-table .table-header,
    .cards-table .table-row {
        grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
        font-size: 13px;
        padding: 10px 12px;
    }
    
    .score-table .table-header,
    .score-table .table-row {
        grid-template-columns: 1fr repeat(6, 1fr);
        font-size: 12px;
        padding: 8px 5px;
    }
    
    .cta-section {
        padding: 30px 20px;
    }
    
    .cta-content h2 {
        font-size: 24px;
    }
    
    .combo-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .rules-container {
        padding: 70px 10px 30px;
    }
    
    .rules-header {
        padding: 25px 15px 30px;
    }
    
    .rules-header h1 {
        font-size: 22px;
    }
    
    .rules-header p {
        font-size: 14px;
    }
    
    .rule-section > h2 {
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    .card-types h3 {
        font-size: 18px;
    }
    
    .rule-block {
        padding: 15px;
    }
    
    .rule-block h3 {
        font-size: 17px;
    }
    
    .combo-card {
        padding: 15px;
    }
    
    .combo-card h3 {
        font-size: 17px;
    }
    
    .cards-table .table-header,
    .cards-table .table-row {
        grid-template-columns: 1fr 1fr 1fr 1fr;
        font-size: 11px;
        padding: 8px 8px;
    }
    
    .score-table .table-header,
    .score-table .table-row {
        font-size: 10px;
        padding: 6px 3px;
    }
    
    .rule-note {
        padding: 12px;
        font-size: 13px;
    }
    
    .cta-section {
        padding: 25px 15px;
        border-radius: 12px;
    }
    
    .cta-content h2 {
        font-size: 20px;
    }
    
    .cta-content p {
        font-size: 14px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }
}

@media (max-width: 380px) {
    .rules-header h1 {
        font-size: 18px;
    }
    
    .cards-table .table-header,
    .cards-table .table-row {
        font-size: 10px;
        padding: 6px 4px;
    }
    
    .score-table .table-header,
    .score-table .table-row {
        font-size: 9px;
        padding: 4px 2px;
    }
}