:root {
            /* light theme (默认) */
            --bg: #f3f6fa;
            --card-bg: #ffffff;
            --primary: #3fa0dd;
            --muted: #9aa8b8;
            --input-bg: #f6fbff;
            --text: #213447;
            --toast-bg: rgba(33, 52, 71, 0.92);
            --toast-text: #ffffff;
            --shadow: 0 10px 18px rgba(63, 160, 221, 0.25);
            --cp-index-shadow: 0 0.15rem 0.6rem rgba(0, 0, 0, 0.12);
            --btn-text: #ffffff;
            --cp-code-bg: var(--input-bg);
            --cp-code-border: #e6f0f8;
            --cp-code-text: var(--muted);

        }

        /* 设计基准：假定正方形区域宽度为 375px 时，根字号约 14.5px */
        /* 公式：14.5 / 375 * 100 = 3.8667，即约 3.87vmin */
        html {
            font-size: 3.87vmin;
        }

        /* 暗色主题配色不变 */
        /* [data-theme="dark"] {
            --bg: #17181b;
            --card-bg: #202428;
            --primary: #f6e96b;
            --muted: #c1c4c9;
            --input-bg: #2b2f33;
            --text: #e9eef6;
            --toast-bg: rgba(0, 0, 0, 0.72);
            --toast-text: #fff7d6;
            --shadow: 0 10px 24px rgba(0, 0, 0, 0.55);
            --border: rgba(255, 255, 255, 0.06);
            --input-placeholder: rgba(233, 238, 246, 0.32);
            --btn-text: #0f1113;
            --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            --tab-underline: rgba(246, 233, 107, 0.25);
        } */
         [data-theme="dark"] {
            --bg: #17181b;
            --card-bg: #202428;
            --primary: #ffff66;
            --muted: #c1c4c9;
            --input-bg: #2b2f33;
            --text: #FFFAFA;
            --toast-bg: rgba(0, 0, 0, 0.72);
            --toast-text: #ffffcc;
            --shadow: 0 10px 24px rgba(0, 0, 0, 0.55);
            --border: rgba(255, 255, 255, 0.06);
            --input-placeholder: rgba(233, 238, 246, 0.32);
            --btn-text: #333333;
            --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            --tab-underline: rgba(246, 233, 107, 0.25);
            --cp-index-shadow: 0 0.15rem 0.6rem rgba(255, 255, 255, 0.12);
            --cp-code-bg: rgba(255, 255, 102, 0.1);
            --cp-code-border: rgba(255, 255, 102, 0.45);
            --cp-code-text: #ffff99;
        }
   
        * {
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        button {
            cursor: pointer;
            touch-action: manipulation;
        }

        button:active {
            opacity: 0.7;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: center;
            /* ----- 改动：高宽都基于 vmin 铺满正方形 ----- */
            width: 100vw;
            height: 100vh;
            overflow: hidden;
            /* 固定定位防抖 */
            position: fixed;
            top: 0;
            left: 0;
            /* 注意：如果 WebView 不是全屏，可能需要在 Unity 中调整偏移，但一般正方形区域就是 0,0 */
            /* 抗锯齿优化 */
            transform: translateZ(0);
            -webkit-transform: translateZ(0);
            backface-visibility: hidden;
            -webkit-backface-visibility: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .card {
            width: 100%;
            height: 100%;
            background: var(--card-bg);
            box-shadow: var(--card-shadow, 0 14px 36px rgba(0, 0, 0, 0.08));
            display: flex;
            flex-direction: column;
        }

        .content {
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 1rem 1.5rem;
        }

        .logo {
            display: flex;
            justify-content: center;
            margin-top: -0.6rem;
        }

        .logo img {
            height: 2rem;
        }

        .goback {
            font-size: 2rem;
        }

        .tabs {
            display: flex;
            gap: 1rem;
            justify-content: flex-start;
            margin-bottom: 0.8rem;
        }

        .tab,
        .activeTab {
            font-size: 1.2rem;
            font-weight: 900;
            color: var(--muted);
            padding: 0.3rem 0;
            cursor: pointer;
        }

        .tab.active,
        .activeTab.active {
            color: var(--primary);
            position: relative;
        }

        .tab.active::after,
        .activeTab.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            height: 0.25rem;
            right: 0;
            background: var(--tab-underline, rgba(63, 160, 221, 0.25));
            border-radius: 4px;
        }

        .mobile-row,
        .code-row {
            display: flex;
            gap: 0.6rem;
            margin-bottom: 0.8rem;
            position: relative;
        }

        .prefix {
            background: transparent;
            border: 0;
            width: 3.5rem;
            padding: 0.8rem 0;
            text-align: center;
            color: var(--text);
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 0.9rem;
            line-height: 0.9rem;
            border-right: 0.08rem solid var(--border, #e6f0f8);
        }

        .input {
            flex: 1;
            height: 2.8rem;
            line-height: 2.8rem;
            padding: 0 0.8rem;
            border-radius: 0.5rem;
            border: 0.08rem solid var(--border, #e6f0f8);
            background: var(--input-bg);
            color: var(--text);
            font-size: 1rem;
        }

        .input::placeholder {
            color: var(--input-placeholder, #9aa8b8);
        }

        .date-wrapper {
            position: relative;
            width: 100%;
        }

        /* 日期输入：保留占位显示 */
        .date-placeholder {
            position: absolute;
            left: 0.8rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--input-placeholder, #9aa8b8);
            pointer-events: none;
            font-size: 1rem;
        }

        /* 尝试放大原生日期控件的日历/下拉指示器（Chromium / WebKit） */
        input[type="date"].date-input::-webkit-calendar-picker-indicator {
            position: absolute;
            right: 0.8rem;
            width: 1.6rem;
            height: 1.6rem;
            opacity: 1;
            cursor: pointer;
            transform: scale(1.5);
            -webkit-transform: scale(1.5);
            background-size: 1.6rem 1.6rem;
        }

        /* 回退：隐藏原生指示器并使用自定义矢量图标，保证在不支持放大的环境可见 */
        input[type="date"].date-input.no-native {
            -webkit-appearance: none;
            appearance: none;
            padding-right: 2.6rem;
            /* 为自定义图标留出空间 */
        }

        #complete_region_group::after ,.date-wrapper.custom-icon::after {
            content: "";
            position: absolute;
            right: 0.9rem;
            top: 50%;
            transform: translateY(-50%);
            width: 1.4rem;
            height: 1.4rem;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="%239aa8b8" d="M7 10l5 5 5-5z"/></svg>');
            background-repeat: no-repeat;
            background-size: contain;
            pointer-events: none;
        }

        .date-wrapper.has-value .date-placeholder,
        .date-wrapper .date-input:focus+.date-placeholder {
            opacity: 0;
            visibility: hidden;
        }

        .get-code {
            background: transparent;
            color: var(--primary);
            cursor: pointer;
            border: 0;
            padding: 0.8rem 0.5rem;
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 0.9rem;
            line-height: 0.9rem;
            border-left: 0.08rem solid var(--border, #e6f0f8);
            height: 99%;
        }

        .tips {
            font-size: 0.9rem;
            color: #f59a23;
            margin: -0.6rem 0 0.8rem 0.8rem;
        }

        .link-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--muted);
            font-size: 0.9rem;
            margin: 0.8rem 0 0.8rem;
        }

        .btn-primary {
            width: 100%;
            padding: 0.6rem 1.2rem;
            border-radius: 0.5rem;
            background: var(--primary);
            color: var(--btn-text, #fff);
            border: none;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: var(--shadow, 0 10px 18px rgba(63, 160, 221, 0.25));
            cursor: pointer;
        }

        .footer-note {
            font-size: 0.95rem;
            color: var(--muted);
            text-align: center;
            margin-top: 1rem;
            line-height: 1.2rem;
            height: 1.2rem;
        }

        /* 协议行仍固定在底部 */
        .agree-row {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--muted);
            font-size: 0.8rem;
            flex-wrap: wrap;
            position: absolute;
            bottom: 0.4rem;
            left: 0;
            right: 0;
            padding: 0 1.5rem;
            line-height: 1rem;
        }

        .agree-row input[type="checkbox"] {
            -webkit-appearance: none;
            appearance: none;
            width: 0.7rem;
            height: 0.7rem;
            border-radius: 3px;
            display: block;
            margin-right: 0.1rem;
            border: 0.08rem solid var(--muted, rgba(0, 0, 0, 0.12));
            background: transparent;
            position: relative;
            transform: scale(1.1);
        }

        .agree-row input[type="checkbox"]:checked {
            background: var(--primary);
            border-color: var(--primary);
        }

        .agree-row input[type="checkbox"]:checked::after {
            content: '';
            position: absolute;
            left: 50%;
            top: 50%;
            width: 0.2rem;
            height: 0.5rem;
            border: solid var(--btn-text, #fff);
            border-width: 0 0.1rem 0.1rem 0;
            transform: translate(-50%, -50%) rotate(45deg);
        }

        .agree-row a {
            color: var(--primary);
            text-decoration: none;
        }

        .pw-toggle {
            position: absolute;
            right: 0.7rem;
            top: 50%;
            transform: translateY(-50%);
            width: 2.8rem;
            height: 2.8rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 0;
            cursor: pointer;
            color: var(--muted);
            padding: 0.5rem;
        }

        .pw-toggle img {
            width: 1.2rem;
            height: 1.2rem;
            object-fit: contain;
            display: block;
            opacity: 0.85;
        }

        .icon {
            width: 1em;
            height: 1em;
            vertical-align: -0.15em;
            fill: currentColor;
        }

        .gologin {
            font-size: 1rem;
            color: var(--muted);
        }

        #loginForm {
            display: none;
        }

        .radio-box {
            position: absolute;
            right: 1.2rem;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }

        .radio-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            position: relative;
            cursor: pointer;
            user-select: none;
            padding: 0.6rem 0.4rem;
            border-radius: 0.5rem;
        }

        .radio-label input[type="radio"] {
            position: absolute;
            left: 0.5rem;
            top: 50%;
            transform: translateY(-50%);
            width: 1rem;
            height: 1rem;
            opacity: 0;
            margin: 0;
            pointer-events: auto;
        }

        .radio-dot {
            width: 1rem;
            height: 1rem;
            border-radius: 50%;
            border: 0.08rem solid var(--muted, rgba(0, 0, 0, 0.12));
            background: transparent;
            display: inline-block;
            box-sizing: border-box;
            position: relative;
            flex: 0 0 auto;
        }

        .radio-dot::after {
            content: '';
            position: absolute;
            left: 50%;
            top: 50%;
            width: 0.5rem;
            height: 0.5rem;
            transform: translate(-50%, -50%) scale(0);
            border-radius: 50%;
            background: var(--btn-text, #fff);
            transition: transform 120ms ease;
        }

        .radio-label input[type="radio"]:checked+.radio-dot {
            background: var(--primary);
            border-color: var(--primary);
        }

        .radio-label input[type="radio"]:checked+.radio-dot::after {
            transform: translate(-50%, -50%) scale(1);
        }

        .radio-text {
            color: var(--muted);
            font-size: 0.9rem;
        }

        .radio-label input[type="radio"]:checked~.radio-text {
            color: var(--primary);
        }

        .toast {
            position: fixed;
            left: 50%;
            bottom: 40%;
            transform: translateX(-50%);
            background: var(--toast-bg);
            color: var(--toast-text);
            padding: 0.6rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.9rem;
            box-shadow: var(--shadow);
            opacity: 0;
            pointer-events: none;
            transition: opacity 220ms ease, transform 220ms ease;
            z-index: 9999;
            max-width: 90%;
            text-align: center;
        }

        .toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(-6px);
            pointer-events: auto;
        }

        .country-picker {
            position: fixed;
            inset: 0;
            display: block;
            z-index: 10000;
            pointer-events: none;
        }

        .country-picker .cp-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            opacity: 0;
            transition: opacity 180ms ease;
        }

        .country-picker .cp-panel {
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translate(-50%, 100%);
            width: 100%;
            border-radius: 12px 12px 0 0;
            height: 75vh;
            /* 弹窗高度可保留 vh，在正方形内 vh 等于 vmin */
            overflow: hidden;
            background: var(--card-bg);
            box-shadow: var(--card-shadow, 0 20px 40px rgba(0, 0, 0, 0.2));
            display: flex;
            flex-direction: column;
            transition: transform 260ms cubic-bezier(.2, .9, .2, 1);
        }

        .country-picker .cp-header {
            padding: 0.8rem;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 0.08rem solid var(--border, #e6f0f8);
        }
        .country-picker .cp-header-title {
            color: var(--primary);
        }
        .country-picker .cp-body {
            flex: 1;
            position: relative;
            overflow: hidden;
            min-height: 0;
        }

        .country-picker .cp-index {
            display: none;
            position: absolute;
            right: 0.35rem;
            top: 50%;
            transform: translateY(-50%);
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 0.2rem 0.2rem;
            z-index: 3;
            border-radius: 0.65rem;
            background: color-mix(in srgb, var(--card-bg) 90%, transparent);
            box-shadow: var(--cp-index-shadow);
            pointer-events: none;
        }

        .country-picker.region-mode .cp-index {
            display: flex;
        }
        .country-picker .cp-index-letter {
            width: 1.2rem;
            height: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 0;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            white-space: nowrap;
            pointer-events: auto;
            margin-bottom: 0.7rem;
            position: relative;
        }
        
        .country-picker .cp-index-letter:nth-last-child(1){
            margin-bottom: 0;
        }

        .country-picker .cp-index-letter.disabled {
            color: var(--muted);
            opacity: 0.35;
            cursor: default;
            pointer-events: none;
        }

        .country-picker .cp-index-letter.active {
            color: var(--btn-text);
            background: var(--primary);
            border-radius: 1rem;
            font-weight: 600;
        }

        .country-picker .cp-list {
            flex: 1;
            width: 100%;
            height: 100%;
            padding: 0.4rem;
            padding-top: 0rem;
            -ms-overflow-style: -ms-autohiding-scrollbar;
            overflow-y: auto;
            touch-action: pan-y;
            -webkit-overflow-scrolling: touch;
            /* 允许垂直滚动，禁止其他手势 */
            overscroll-behavior: contain;
            touch-action: pan-y; 
            user-select: none !important;
            -webkit-user-select: none !important;
            -webkit-touch-callout: none !important;
        }

        .country-picker.region-mode .cp-list {
            padding-right: 2rem;
        }

        .country-picker .cp-section {
            position: relative;
        }
        .cp-item:first-of-type {
            padding-top: 0.85rem;
        }
        .country-picker .text-lg {
            display: flex;
            align-items: center;
        }
        .country-picker .cp-code {
            font-weight: 600;
            margin-right: 0.35rem;
            width: 2.5rem;
            text-align: center;
            display: block;
            font-size: 0.8rem;
            border: 0.02rem solid var(--border, #e6f0f8);
            border-radius: 0.4rem;
            padding: 0.1rem 0.1rem;
            margin-right: 0.6rem;
            color: var(--muted);
            background: var(--cp-code-bg);
        }

        .country-picker .cp-name {
            display: inline-block;
            width: 18rem;
        }

        .country-picker .cp-item {
            padding: 0.6rem 0.8rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text);
            border-top: 0.08rem solid var(--border, #e6f0f8);
            /* 避免布局抖动 */
            transform: translateZ(0);
            will-change: transform;
        }

        .country-picker .cp-item:first-child {
            border-top: none;
        }

        .country-picker.open {
            pointer-events: auto;
        }

        .country-picker.open .cp-backdrop {
            opacity: 1;
        }

        .country-picker.open .cp-panel {
            transform: translate(-50%, 0);
        }

        /* 关闭按钮（右上角） */
        .close-btn {
            position: absolute;
            top: 0.8rem;
            right: 0.8rem;
            width: 2.2rem;
            height: 2.2rem;
            border: 0;
            background: transparent;
            color: var(--text);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            z-index: 10001;
            cursor: pointer;
        }
        .close-btn:hover { opacity: 0.9; }
        .close-btn:active { transform: scale(0.98); }