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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f1f5f9;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden; /* // [NEW] 禁止 body 滚动条 */
}

.container {
    max-width: 620px;
    width: 100%;
    background: #ffffff;
    border-radius: 28px;
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.02);
    padding: 28px 28px 36px;
    transition: all 0.2s ease;
    position: relative;
}

/* 头部区域 ———— 标题 + 设置图标行 */
.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 12px;
}

.title-box {
    flex: 1;
}

h1 {
    font-size: 26px;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, #1e293b 0%, #2d3a5e 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    display: inline-block;
}

.badge {
    font-size: 11px;
    font-weight: 500;
    background: #eef2ff;
    color: #3b82f6;
    border-radius: 30px;
    padding: 2px 10px;
    margin-left: 8px;
    vertical-align: middle;
}

/* 头部右侧：退出按钮 + 设置图标 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 设置按钮通用样式 */
.settings-icon-btn {
    background: #f8fafc;
    border: 1px solid #e2edf2;
    border-radius: 44px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.settings-icon-btn:hover {
    background: #ffffff;
    border-color: #cbdff2;
    transform: rotate(8deg) scale(1.02);
    box-shadow: 0 8px 18px -8px rgba(59, 130, 246, 0.25);
}

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

.settings-icon-btn svg {
    width: 22px;
    height: 22px;
    stroke: #334155;
    stroke-width: 1.7;
    fill: none;
    transition: stroke 0.2s;
}

.settings-icon-btn:hover svg {
    stroke: #3b82f6;
}

/* // [NEW] 退出按钮单独样式：图标稍小 */
.logout-icon-btn {
    background: #f8fafc;
    border: 1px solid #e2edf2;
    border-radius: 44px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.logout-icon-btn:hover {
    background: #ffffff;
    border-color: #cbdff2;
    transform: rotate(8deg) scale(1.02);
    box-shadow: 0 8px 18px -8px rgba(59, 130, 246, 0.25);
}

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

.logout-icon-btn svg {
    width: 18px;
    height: 18px;
    stroke: #334155;
    stroke-width: 1.7;
    fill: none;
    transition: stroke 0.2s;
}

.logout-icon-btn:hover svg {
    stroke: #dc2626;
}
/* // [NEW] END */

.sub {
    font-size: 14px;
    color: #475569;
    margin-top: 4px;
    margin-bottom: 24px;
    border-left: 3px solid #3b82f6;
    padding-left: 14px;
    font-weight: 450;
    background: #fafcff;
    border-radius: 0 12px 12px 0;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 6px;
    letter-spacing: -0.2px;
}

input {
    width: 100%;
    padding: 12px 15px;
    font-size: 14px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    border: 1.5px solid #e2e8f0;
    border-radius: 18px;
    background: #ffffff;
    transition: 0.2s;
    outline: none;
    color: #0f172a;
}

input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.btn-dns {
    width: 100%;
    background: #4f46e5;
    color: white;
    border: none;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 40px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    letter-spacing: 0.2px;
    margin-top: 18px;
}

.btn-dns:hover {
    background: #4338ca;
    transform: translateY(-1px);
    box-shadow: 0 8px 18px -8px #4f46e5b0;
}

.btn-dns:active {
    transform: translateY(1px);
}

/* ========= // [NEW] 模态框样式 ========= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    overflow: hidden; /* 禁止遮罩层滚动条 */
}

.modal-card {
    background: white;
    border-radius: 32px;
    max-width: 420px; /* 第一版登录框宽度 */
    width: 90%;
    margin: 20px auto;
    padding: 32px 28px;
    box-shadow: 0 30px 45px -20px rgba(0, 0, 0, 0.3);
    text-align: center;
    animation: fadeInUp 0.2s ease;
}

/* 第一版登录样式 */
.login-card {
    background: #ffffff;
    border-radius: 32px;
    text-align: center;
}
.login-icon {
    color: #4f6ef7;
    margin-bottom: 16px;
}
.login-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #0f172a;
}
.login-subtitle {
    color: #475569;
    margin-bottom: 24px;
    font-size: 14px;
}
.input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e1e8ef;
    border-radius: 28px;
    font-size: 15px;
    outline: none;
    font-family: monospace;
}
.input-group input:focus {
    border-color: #4f6ef7;
    box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.15);
}
.btn-block {
    width: 100%;
    justify-content: center;
}
.error-msg {
    color: #e74c3c;
    font-size: 13px;
    margin-top: 16px;
    min-height: 20px;
}
.modal-card .btn-primary {
    background: #4f46e5;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: 0.2s;
}
.modal-card .btn-primary:hover {
    background: #4338ca;
    transform: translateY(-1px);
}

/* 声明弹窗专用（宽一些但无滚动条） */
.terms-card {
    max-width: 620px;
    text-align: left;
    padding: 28px 32px;
    background: linear-gradient(145deg, #ffffff 0%, #fefefe 100%);
    border: 1px solid rgba(79, 110, 247, 0.1);
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(79, 110, 247, 0.05);
}
.terms-card h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 22px;
    background: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.2px;
}
.terms-content {
    margin: 16px 0 28px;
    font-size: 13px;
    line-height: 1.5;
    color: #1e293b;
}
.terms-content p {
    margin-bottom: 14px;
}
.terms-card .btn-primary {
    width: 100%;
    background: linear-gradient(95deg, #4f46e5 0%, #7c3aed 100%);
    border: none;
    padding: 12px;
    border-radius: 44px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.25s;
}
.terms-card .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -8px #4f46e5;
    background: linear-gradient(95deg, #4338ca 0%, #6d28d9 100%);
}
/* // [NEW] END */

/* 提示Toast */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ef4444;
    color: white;
    padding: 10px 20px;
    border-radius: 40px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

.toast.show {
    opacity: 1;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 18px 28px;
    }
    .settings-icon-btn,
    .logout-icon-btn {
        width: 40px;
        height: 40px;
    }
    .settings-icon-btn svg {
        width: 20px;
        height: 20px;
    }
    .logout-icon-btn svg {
        width: 16px;
        height: 16px;
    }
    .btn-dns {
        padding: 10px;
    }
    .modal-card {
        padding: 24px 20px;
        width: 92%;
    }
    .terms-card {
        padding: 20px 18px;
        max-width: 92%;
    }
    .terms-content {
        font-size: 12px;
        line-height: 1.45;
    }
    .toast {
        white-space: normal;
        text-align: center;
        max-width: 90%;
        font-size: 12px;
        padding: 8px 16px;
    }
}