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

:root {
    --primary-cyan: #00d4ff;
    --primary-blue: #0ea5e9;
    --dark-bg: #0a0e14;
    --card-bg: rgba(15, 23, 42, 0.75);
    --card-border: rgba(14, 165, 233, 0.2);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --input-bg: rgba(30, 41, 59, 0.6);
    --input-border: rgba(148, 163, 184, 0.3);
    --gradient-cyan: linear-gradient(135deg, #00d4ff 0%, #0ea5e9 100%);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 背景层 */
.background-layer {
    position: fixed;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
    transition: background-image 0.5s ease;
}

.background-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 14, 20, 0.95) 0%,
        rgba(10, 14, 20, 0.85) 40%,
        rgba(10, 14, 20, 0.92) 100%
    );
    z-index: 1;
    transition: opacity 0.3s ease;
}

/* 顶部状态栏 */
.status-bar {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    padding-top: env(safe-area-inset-top, 16px);
}

.close-btn,
.settings-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.2);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.close-btn:hover,
.settings-btn:hover {
    background: rgba(14, 165, 233, 0.2);
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

.close-btn svg,
.settings-btn svg {
    width: 20px;
    height: 20px;
}

.page-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

/* 主内容区 */
.main-content {
    position: relative;
    z-index: 5;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    gap: 30px;
}

/* 品牌区域 */
.brand-section {
    text-align: center;
    margin-top: 20px;
}

.brand-tag {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 20px;
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid rgba(14, 165, 233, 0.3);
    color: var(--primary-cyan);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.brand-title {
    font-size: clamp(60px, 15vw, 100px);
    font-weight: 900;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.6) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    letter-spacing: -4px;
    margin-bottom: 12px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.brand-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 标签组 */
.tag-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.tag {
    padding: 6px 16px;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.25);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.tag:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

/* 登录卡片 */
.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 28px 24px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    animation: cardEnter 0.5s ease forwards;
}

.login-card.hidden {
    display: none;
}

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

.card-header {
    text-align: left;
    margin-bottom: 24px;
}

.brand-logo {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--gradient-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--dark-bg);
    margin-bottom: 16px;
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.3);
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-muted);
}

/* 表单样式 */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-cyan);
    background: rgba(30, 41, 59, 0.8);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.toggle-password {
    position: absolute;
    right: 12px;
    bottom: 14px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

.toggle-password:hover {
    color: var(--primary-cyan);
}

.toggle-password svg {
    width: 20px;
    height: 20px;
}

/* 登录按钮 */
.login-btn {
    width: 100%;
    padding: 16px;
    background: var(--gradient-cyan);
    border: none;
    border-radius: 12px;
    color: var(--dark-bg);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

/* 表单底部链接 */
.form-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
}

.link {
    color: var(--primary-cyan);
    text-decoration: none;
    font-size: 14px;
    transition: opacity 0.3s ease;
}

.link:hover {
    opacity: 0.8;
}

/* 设置面板 */
.settings-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 360px;
    background: rgba(15, 23, 42, 0.95);
    border-left: 1px solid rgba(148, 163, 184, 0.1);
    z-index: 100;
    display: flex;
    flex-direction: column;
    animation: slideIn 0.3s ease;
}

.settings-panel.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(0);
    }
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.settings-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-panel {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
}

.close-panel:hover {
    color: var(--primary-cyan);
}

.close-panel svg {
    width: 24px;
    height: 24px;
}

.settings-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.upload-section h4,
.preset-section h4,
.color-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.upload-area {
    border: 2px dashed rgba(148, 163, 184, 0.3);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-cyan);
    background: rgba(14, 165, 233, 0.1);
}

.upload-area svg {
    width: 40px;
    height: 40px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.upload-area:hover svg,
.upload-area.dragover svg {
    color: var(--primary-cyan);
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 4px;
}

.upload-area span {
    color: var(--text-muted);
    font-size: 12px;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.preset-item {
    aspect-ratio: 16/9;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    background-size: cover;
    background-position: center;
}

.preset-item:hover {
    transform: scale(1.02);
}

.preset-item.active {
    border-color: var(--primary-cyan);
    box-shadow: 0 0 0 2px var(--primary-cyan);
}

.opacity-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.opacity-control label {
    font-size: 13px;
    color: var(--text-secondary);
}

.opacity-control input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(148, 163, 184, 0.2);
    border-radius: 3px;
    appearance: none;
    outline: none;
}

.opacity-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-cyan);
    cursor: pointer;
}

.opacity-control span {
    font-size: 13px;
    color: var(--primary-cyan);
    text-align: right;
}

.reset-btn {
    padding: 12px 20px;
    background: transparent;
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

/* 验证码按钮 */
.verify-btn {
    padding: 14px 18px;
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid rgba(14, 165, 233, 0.4);
    border-radius: 12px;
    color: var(--primary-cyan);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s ease;
    min-width: 110px;
}

.verify-btn:hover:not(:disabled) {
    background: rgba(14, 165, 233, 0.25);
    border-color: var(--primary-cyan);
}

.verify-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Toast提示 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 12px;
    padding: 16px 28px;
    color: var(--text-primary);
    font-size: 14px;
    z-index: 200;
    backdrop-filter: blur(20px);
    animation: toastEnter 0.3s ease;
    text-align: center;
    min-width: 200px;
}

.toast.hidden {
    display: none;
}

.toast.success {
    border-color: rgba(34, 197, 94, 0.5);
    color: #22c55e;
}

.toast.error {
    border-color: rgba(239, 68, 68, 0.5);
    color: #ef4444;
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

/* 响应式 */
@media (max-width: 480px) {
    .main-content {
        padding: 16px;
    }

    .login-card {
        padding: 24px 20px;
    }

    .brand-title {
        font-size: 72px;
    }

    .settings-panel {
        max-width: 100%;
    }

    .page-title {
        font-size: 14px;
    }
}

/* 滚动条美化 */
.settings-body::-webkit-scrollbar {
    width: 4px;
}

.settings-body::-webkit-scrollbar-track {
    background: transparent;
}

.settings-body::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.2);
    border-radius: 2px;
}

.settings-body::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.4);
}