/* ===== 全局样式 ===== */
:root {
    --primary: #6c5ce7;
    --primary-light: #a29bfe;
    --secondary: #00cec9;
    --accent: #fd79a8;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
    --dark: #2d3436;
    --gray: #636e72;
    --light-gray: #b2bec3;
    --bg: #0a0a1a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #25254a;
    --text: #f0f0f0;
    --text-muted: #a0a0b0;
    --border: #2a2a4a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --nav-height: 56px;
    --bottom-nav-height: 60px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

/* ===== 顶部导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.logo {
    font-size: 1.3rem;
}

.brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 桌面端顶部导航链接 */
.nav-links {
    display: none;
    gap: 1rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
    background: var(--bg-card);
}

.nav-link.active {
    color: var(--primary-light);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.8rem;
}

.coins {
    color: var(--warning);
}

.level {
    color: var(--secondary);
    font-weight: 600;
}

/* ===== 移动端底部导航 ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.65rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    min-width: 50px;
}

.bottom-nav-item .nav-icon {
    font-size: 1.2rem;
}

.bottom-nav-item.active {
    color: var(--primary-light);
}

.bottom-nav-item.active .nav-icon {
    transform: scale(1.1);
}

/* ===== 主内容 ===== */
.main-content {
    margin-top: var(--nav-height);
    min-height: calc(100vh - var(--nav-height) - var(--bottom-nav-height));
    padding: 1rem;
    padding-bottom: calc(var(--bottom-nav-height) + 1rem);
}

.section {
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.4s ease;
}

.section.hidden {
    display: none;
}

.section-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.4rem;
    margin-bottom: 0.3rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== 欢迎页面 ===== */
.welcome-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--nav-height) - var(--bottom-nav-height) - 2rem);
    text-align: center;
    padding: 1rem 0;
}

.welcome-hero h1 {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.welcome-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
    margin-top: 2rem;
    width: 100%;
    max-width: 400px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}

.stat-card:active {
    transform: scale(0.97);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== 按钮 ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.btn-primary:active {
    transform: scale(0.96);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-light);
    border: 1px solid var(--primary);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:active {
    background: var(--primary);
    color: white;
}

.btn-small {
    background: transparent;
    color: var(--secondary);
    border: 1px solid var(--secondary);
    padding: 0.35rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-small:active {
    background: var(--secondary);
    color: var(--dark);
}

.btn-start {
    font-size: 1.1rem;
    padding: 0.9rem 2.5rem;
}

/* ===== 弹窗 ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: flex-end;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    width: 100%;
    max-width: 500px;
    max-height: 85vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-card);
    z-index: 1;
}

.modal-header h3 {
    font-size: 1.1rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.3rem;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger);
}

.modal-body {
    padding: 1.2rem 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.8rem;
    padding: 1rem;
    border-top: 1px solid var(--border);
    position: sticky;
    bottom: 0;
    background: var(--bg-card);
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.7rem 0.8rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 16px; /* 防止iOS缩放 */
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    min-height: 70px;
    resize: vertical;
}

.form-group input[type="range"] {
    width: 70%;
    margin-right: 0.5rem;
}

/* ===== Toast通知 ===== */
.toast-container {
    position: fixed;
    top: calc(var(--nav-height) + 10px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 90%;
    max-width: 350px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    animation: slideDown 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.warning { border-left: 4px solid var(--warning); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

/* ===== 动画 ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(100px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes checkinBounce {
    0% { transform: scale(1); }
    30% { transform: scale(1.3); }
    50% { transform: scale(0.9); }
    70% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* ===== iPad 适配 (768px - 1024px) ===== */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --nav-height: 56px;
        --bottom-nav-height: 0px;
    }

    .navbar {
        padding: 0 1.5rem;
    }

    .nav-links {
        display: flex;
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.6rem;
    }

    .bottom-nav {
        display: none;
    }

    .main-content {
        padding: 1.5rem;
        padding-bottom: 1.5rem;
    }

    .welcome-hero h1 {
        font-size: 2.4rem;
    }

    .welcome-stats {
        grid-template-columns: repeat(4, 1fr);
        max-width: 700px;
        gap: 1rem;
    }

    .stat-card {
        padding: 1.2rem;
    }

    .stat-icon { font-size: 1.8rem; }
    .stat-value { font-size: 1.5rem; }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .section {
        max-width: 900px;
    }

    .modal {
        align-items: center;
    }

    .modal-content {
        border-radius: var(--radius);
        width: 80%;
        max-width: 500px;
    }

    .toast-container {
        left: auto;
        right: 20px;
        transform: none;
    }
}

/* ===== 桌面端响应式 (>1024px) ===== */
@media (min-width: 1025px) {
    :root {
        --nav-height: 60px;
        --bottom-nav-height: 0px;
    }

    .navbar {
        padding: 0 2rem;
    }

    .nav-links {
        display: flex;
    }

    .bottom-nav {
        display: none;
    }

    .main-content {
        padding: 2rem;
        padding-bottom: 2rem;
    }

    .welcome-hero h1 {
        font-size: 3rem;
    }

    .welcome-stats {
        grid-template-columns: repeat(4, 1fr);
        max-width: 800px;
        gap: 1.5rem;
    }

    .stat-card {
        padding: 1.5rem;
    }

    .stat-icon { font-size: 2rem; }
    .stat-value { font-size: 1.8rem; }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .modal {
        align-items: center;
    }

    .modal-content {
        border-radius: var(--radius);
        width: 90%;
    }

    .toast-container {
        left: auto;
        right: 20px;
        transform: none;
    }
}

/* 桌面端+iPad共用hover效果 */
@media (min-width: 769px) {
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
    }

    .btn-secondary:hover {
        background: var(--primary);
        color: white;
    }

    .stat-card:hover {
        transform: translateY(-4px);
        border-color: var(--primary);
    }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* ===== 通用工具类 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }


/* ===== 更多页面 ===== */
.more-section {
    max-width: 600px;
}

.more-list {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.more-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.2rem;
    text-decoration: none;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.more-item:last-child {
    border-bottom: none;
}

.more-item:active {
    background: var(--bg-card-hover);
}

.more-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.more-info {
    flex: 1;
    min-width: 0;
}

.more-name {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
}

.more-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.more-arrow {
    color: var(--text-muted);
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* iPad 和桌面端：更多页面在底部导航位置不存在，所以不需要显示 */
@media (min-width: 769px) {
    .bottom-nav-item[data-section="more"] {
        display: none;
    }
}


/* ===== 设置页面分组标题 ===== */
.settings-group-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 1.2rem 0 0.5rem 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.settings-group-title:first-of-type {
    margin-top: 0;
}

/* 桌面端导航的图标按钮（设置） */
.nav-link-icon {
    font-size: 1.1rem;
    padding: 0.4rem 0.6rem !important;
}