/* ===================================================
   登录页（2026-08-18 换肤，Figma Page 4）
   纯白底 + 鼠尾草绿按钮 + 胶囊输入框 + 奶油协议卡，
   与 chat.css 的主界面新皮同一套色
   =================================================== */
:root {
    --lg-paper: #ffffff;
    --lg-card: #ffffff;
    --lg-line: #e5e0d5;
    --lg-ink: #4a433d;
    --lg-ink-2: #8e8680;
    --lg-ink-3: #b2aca4;
    --lg-green: #7a9e74;
    --lg-green-deep: #6b8f66;
    --lg-green-text: #708476;
    --lg-cream: #faf6f1;
}

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

body.lg-body {
    min-height: 100vh;
    min-height: 100dvh;
    font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--lg-paper);
    color: var(--lg-ink);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    /* 全站禁缩放三层之一（详注在 chat.css 的 html/body；lg-body 覆盖登录页和条款页） */
    touch-action: pan-x pan-y;
}

/* 登录页局部色阶：保留鼠尾草绿，提高清晰度；不改变共用此文件的条款页。 */
body.lg-body:not(.lg-body-doc) {
    --lg-ink-2: #6f675f;
    --lg-ink-3: #756d64;
    --lg-green: #5b7954;
    --lg-green-deep: #496743;
    --lg-green-text: #536b56;
    padding-top: max(64px, env(safe-area-inset-top, 0px));
    padding-bottom: max(24px, env(safe-area-inset-bottom, 0px));
}

.lg-form button {
    font-family: inherit;
}

.lg-form :is(button, a, input[type="checkbox"]):focus-visible,
.lg-a2hs:focus-visible,
.lg-modal :is(button, input):focus-visible {
    outline: 2px solid var(--lg-green-deep);
    outline-offset: 3px;
}

/* Figma Page 4：整页纯白，卡片概念取消（无边框无阴影），只是一列限宽内容 */
.lg-card {
    width: 100%;
    max-width: 380px;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 34px 26px 26px;
    box-shadow: none;
}

/* Logo */
.lg-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    margin-bottom: 34px;
}

/* logo 已是透明底（2026-08-03），box-shadow 会围着透明画布画矩形，不能加。
   悬浮特效（2026-08-26）：轻轻上下漂 + 脚下椭圆影子跟着缩放，像浮在空中；
   点一下歪头晃两下。影子是 .lg-logo::before 画的渐变椭圆，不碰图片本身 */
.lg-logo {
    position: relative;
}

.lg-logo::before {
    content: '';
    position: absolute;
    top: 100px;
    width: 64px;
    height: 12px;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, rgba(70, 61, 46, 0.18), transparent 70%);
    animation: lg-logo-shadow 3.6s ease-in-out infinite;
}

.lg-logo img {
    width: 96px;
    height: 96px;
    object-fit: contain;
    animation: lg-logo-float 3.6s ease-in-out infinite;
}

.lg-logo img:active {
    animation: lg-logo-wiggle 0.5s ease-in-out;
}

@keyframes lg-logo-float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}

@keyframes lg-logo-shadow {
    0%, 100% { transform: scaleX(1); opacity: 1; }
    50%      { transform: scaleX(0.78); opacity: 0.55; }
}

@keyframes lg-logo-wiggle {
    0%, 100% { transform: rotate(0); }
    25%      { transform: rotate(-7deg); }
    65%      { transform: rotate(6deg); }
}

/* 系统开了"减少动态效果"就全部静止（晕动症用户） */
@media (prefers-reduced-motion: reduce) {
    .lg-logo img,
    .lg-logo::before {
        animation: none;
    }
}

.lg-logo p {
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--lg-ink);
}

/* 输入类型切换标签行（账号/电话/邮箱 与 验证码/密码 同一套格式） */
.lg-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding-left: 8px;
    font-size: 0.82rem;
}

.lg-tabs .label-tab {
    border: none;
    background: transparent;
    color: var(--lg-ink-3);
    font-size: 0.82rem;
    cursor: pointer;
    padding: 2px 2px;
}

.lg-tabs .label-tab.active {
    color: var(--lg-green-deep);
    font-weight: 700;
}

.lg-tabs .label-tab-divider {
    color: var(--lg-line);
}

/* 输入框（Figma Page 4：白底细描边全圆角胶囊，左侧灰绿图标） */
.lg-input {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 20px;
    height: 52px;
    margin-bottom: 16px;
    background: var(--lg-card);
    border: 1px solid var(--lg-line);
    border-radius: 999px;
    transition: border-color 0.18s ease;
}

.lg-input:focus-within {
    border-color: var(--lg-green);
}

.lg-input > i {
    color: var(--lg-green-text);
    font-size: 0.95rem;
    width: 1.1rem;
    text-align: center;
    flex-shrink: 0;
}

/* 小白猫趴在第一个输入框顶边（Figma Page 4），只随凭证模式显隐 */
.lg-cat {
    position: absolute;
    right: 24px;
    bottom: calc(100% + 1px);
    width: 70px;
    object-fit: contain;
    pointer-events: none;
}

.lg-input input {
    flex: 1;
    min-width: 0;
    height: 100%;
    border: none;
    outline: none;
    background: transparent;
    font-size: 16px;
    color: var(--lg-ink);
    caret-color: var(--lg-green-deep);
}

.lg-input input::placeholder {
    color: var(--lg-ink-3);
}

.lg-code-btn {
    white-space: nowrap;
    padding: 7px 14px;
    border: 1px solid var(--lg-green);
    background: transparent;
    color: var(--lg-green-deep);
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.78rem;
    flex-shrink: 0;
}

.lg-code-btn:disabled {
    opacity: 0.55;
    cursor: default;
}

/* auth.css 里的同名规则是 position:absolute + right/top/transform，而 .lg-input 是
   flex 且没有 position:relative —— 按钮会以页面为参照飞出输入框，肉眼直接看不见。
   CSS 是属性级层叠，光覆盖颜色边框没用，定位属性必须在这一层显式收回来 */
.password-toggle {
    position: static;
    transform: none;
    padding: 4px;
    border: none;
    background: transparent;
    color: var(--lg-ink-3);
    cursor: pointer;
    font-size: 0.85rem;
    flex-shrink: 0;
    min-width: 44px;
    min-height: 44px;
}

.password-toggle:hover {
    color: var(--lg-green-deep);
    background: transparent;
}

/* 登录按钮（Figma Page 4：鼠尾草绿纯色胶囊） */
.lg-login-btn {
    width: 100%;
    height: 48px;
    margin-top: 6px;
    border: none;
    border-radius: 999px;
    background: var(--lg-green);
    color: #fff;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 6px;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease;
}

.lg-login-btn:hover {
    background: var(--lg-green-deep);
}

.lg-login-btn:active {
    transform: scale(0.98);
}

/* 申请邀请码（注册态专属，Figma Page 4：按钮下方居中的绿色入口，点开邀请制说明弹窗） */
.lg-apply-invite {
    display: block;
    width: 100%;
    min-height: 44px;
    margin: 12px 0 4px;
    border: none;
    background: transparent;
    text-align: center;
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--lg-green-text);
    cursor: pointer;
}

.lg-apply-invite:hover {
    color: var(--lg-green-deep);
}

/* 邀请制说明弹窗 */
.lg-modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 24px;
}

.lg-modal[hidden] {
    display: none;
}

.lg-modal-mask {
    position: absolute;
    inset: 0;
    background: rgba(38, 29, 19, 0.35);
}

.lg-modal-card {
    position: relative;
    width: 100%;
    max-width: 360px;
    background: #fff;
    border-radius: 20px;
    padding: 26px 24px 22px;
    box-shadow: 0 18px 48px rgba(70, 62, 50, 0.18);
    max-height: calc(100dvh - 48px);
    overflow-y: auto;
}

.lg-modal-card h3 {
    margin-bottom: 14px;
    font-size: 1.05rem;
    color: var(--lg-ink);
    text-align: center;
}

.lg-modal-card p {
    margin-bottom: 10px;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--lg-ink-2);
}

.lg-modal-mail {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 14px 0 18px;
    padding: 10px 14px;
    background: var(--lg-cream);
    border-radius: 12px;
}

/* 弹窗里的邮箱输入（2026-08-26 取代原来的只读邮箱+复制键） */
.lg-modal-mail input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    font-size: 16px;   /* <16px iOS 聚焦会放大整页 */
    color: var(--lg-ink);
    outline: none;
}

.lg-modal-mail input::placeholder {
    color: var(--lg-ink-3);
}

.lg-modal-status {
    min-height: 1.2em;
    margin: -8px 0 10px;
    font-size: 0.78rem;
}

.lg-modal-mail button {
    flex-shrink: 0;
    padding: 6px 14px;
    border: 1px solid var(--lg-green);
    border-radius: 999px;
    background: transparent;
    color: var(--lg-green-deep);
    font-size: 0.78rem;
    cursor: pointer;
    min-height: 44px;
}

.lg-modal-mail button:hover {
    background: var(--lg-green);
    color: #fff;
}

.lg-modal-close {
    display: block;
    width: 100%;
    height: 44px;
    border: none;
    border-radius: 999px;
    background: var(--lg-green);
    color: #fff;
    font-size: 0.92rem;
    cursor: pointer;
}

.lg-modal-close:hover {
    background: var(--lg-green-deep);
}

/* 添加到桌面（右上角悬浮；standalone/装完由 login.js 藏，弹窗 z-index 100 天然压住它） */
.lg-a2hs {
    position: fixed;
    top: calc(12px + env(safe-area-inset-top, 0px));
    right: 14px;
    z-index: 60;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--lg-line);
    border-radius: 999px;
    background: #fff;
    color: var(--lg-green-text);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(70, 62, 50, 0.08);
    min-height: 44px;
}

.lg-a2hs:hover {
    border-color: var(--lg-green);
    color: var(--lg-green-deep);
}

.lg-a2hs[hidden] {
    display: none; /* 老坑：类自带 display 会压住 UA 的 [hidden] */
}

/* 记住我 / 忘记密码 / 注册账号 */
.lg-links {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 0.78rem;
    color: var(--lg-ink-2);
}

.lg-links-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.lg-register-link {
    border: none;
    background: transparent;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--lg-ink);
    cursor: pointer;
}

.lg-register-link:hover {
    color: var(--lg-green-deep);
}

.lg-remember {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.lg-remember input {
    accent-color: var(--lg-green-deep);
}

.lg-links a {
    color: var(--lg-ink-2);
    text-decoration: none;
}

.lg-links a:hover {
    color: var(--lg-green-deep);
}

/* 三条勾选的奶油卡（Figma Page 4：#FAF6F1 圆角 16） */
/* 三种登录状态都按实际内容排版；多一项输入时优先使用页首的弹性留白。 */
.lg-form-slot {
    min-height: 0;
}

.lg-agree-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    /* 条款比主输入列窄一圈；高度由文字自然换行决定。 */
    width: calc(100% - 24px);
    margin: 20px auto 0;
    padding: 12px 14px;
    background: var(--lg-cream);
    border-radius: 16px;
}

.lg-agree {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--lg-ink-2);
    line-height: 1.6;
}

.lg-agree input {
    margin-top: 2px;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    accent-color: var(--lg-green-deep);
}

.lg-agree a {
    color: var(--lg-green-deep);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* 条款链接在 label 外面，这层把它们收成一行行内流，免得吃到 .lg-agree 的 gap */
.lg-agree-text {
    flex: 1;
    min-width: 0;
}

/* 协议名称独立成行，用固定间距分隔，避免连接词换行后产生缩进。 */
.lg-law-links {
    display: inline;
}

.lg-law-links a,
.lg-agree-tail {
    white-space: nowrap;
}

.lg-agree-tail {
    display: inline-block;
}

.lg-agree-detail {
    display: inline-block;
    margin-inline-start: 4px;
    white-space: nowrap;
}

.lg-agree-text label {
    cursor: pointer;
}

/* 协议正文页 */

/* 条款有几百行，而 .lg-body 是 align-items:center —— 内容高过视口时
   flex 居中会把顶部溢出到滚动区之外，用户永远滚不到开头。长文页必须顶对齐 */
body.lg-body-doc {
    align-items: flex-start;
}

/* 这张卡和登录卡共用 .lg-card，但登录卡的 380px 是给一列输入框定的，
   套在几百行条款上就是一条细带子。上限仍留着：中文满屏会到 100+ 字一行，
   眼睛找不回行首。手机端由末尾 @media 的 .lg-card 覆盖成通栏 */
.lg-legal {
    max-width: 820px;
    padding: 40px 44px 32px;
    text-align: left;
    line-height: 1.8;
    color: var(--lg-ink-2);
    font-size: 0.95rem;
}

.lg-legal-title {
    margin: 0 0 4px;
    font-size: 1.15rem;
    color: var(--lg-ink);
}

.lg-legal-meta {
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--lg-line);
    font-size: 0.76rem;
    color: var(--lg-ink-3);
}

.lg-legal h2 {
    margin: 26px 0 10px;
    font-size: 0.98rem;
    color: var(--lg-ink);
}

.lg-legal h3 {
    margin: 18px 0 8px;
    font-size: 0.88rem;
    color: var(--lg-ink);
}

.lg-legal p {
    margin-bottom: 10px;
}

.lg-legal-placeholder {
    padding: 10px 14px;
    border-radius: 10px;
    background: #faf7f0;
    border: 1px dashed var(--lg-line);
    color: var(--lg-ink-3);
}

.lg-legal ul {
    margin-bottom: 10px;
    padding-left: 1.2em;
}

.lg-legal li {
    margin-bottom: 6px;
}

/* 协议页固定顶栏（2026-08-26，取代页尾的 .lg-legal-back）：
   返回居左、协议名居中、滚动不动 */
.lg-doc-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--lg-paper);
    border-bottom: 1px solid var(--lg-line);
}

.lg-doc-back {
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    color: var(--lg-ink);
    text-decoration: none;
    font-size: 1.2rem;
}

.lg-doc-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--lg-ink);
    max-width: 60vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 顶栏是 fixed 的：正文让出它的高度；锚点跳转（#clause-5/6）也要躲开它 */
body.lg-body-doc {
    padding-top: 64px;
}

.lg-legal [id] {
    scroll-margin-top: 64px;
}

/* 分割线 */
.lg-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 12px;
    color: var(--lg-ink-3);
    font-size: 0.8125rem;
    white-space: nowrap;
}

.lg-divider::before,
.lg-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--lg-line);
}

/* 底部快捷入口（Figma 圆形图标 + 文字） */
.lg-quick-row {
    display: flex;
    justify-content: space-around;
}

.lg-quick {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 7px;
    border: none;
    background: transparent;
    color: var(--lg-ink-2);
    font-size: 0.8125rem;
    cursor: pointer;
}

/* Figma Page 4：白底细描边圆钮，灰色图标 */
.lg-quick-icon {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border: 1px solid var(--lg-line);
    border-radius: 50%;
    background: var(--lg-card);
    color: var(--lg-green-text);
    font-size: 1.1rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.lg-quick:hover .lg-quick-icon {
    transform: translateY(-2px);
    box-shadow: 0 5px 12px rgba(96, 82, 54, 0.14);
}

.lg-hint {
    margin-top: 16px;
    text-align: center;
    font-size: 0.72rem;
    color: var(--lg-ink-3);
}

/* 手机端（Figma）：同样纯白平铺，只调留白 */
@media (max-width: 600px) {
    body.lg-body {
        align-items: stretch;
        padding: 40px 24px 24px;
    }

    .lg-card {
        max-width: none;
        padding: 24px 4px;
        /* 垂直居中（2026-08-26）：原来内容顶着屏幕上沿、底下留一大片空。
           用 auto margin 而不是 align-items:center——内容高过视口时 auto
           归零回到顶对齐，短屏上不会把 logo 顶出滚动区（lg-body-doc 那条坑） */
        margin-top: auto;
        margin-bottom: auto;
    }

    .lg-logo {
        gap: 12px;
        margin-bottom: 52px;
    }

    .lg-logo p {
        margin: 0;
    }

    .lg-logo img {
        width: 104px;
        height: 104px;
    }

    .lg-logo::before {
        top: 108px;
    }

    body.lg-body:not(.lg-body-doc) {
        /* 留白由内容决定：账号模式自动上移，快速模式自然居中。 */
        padding-top: calc(64px + env(safe-area-inset-top, 0px));
        padding-bottom: max(16px, env(safe-area-inset-bottom, 0px));
        padding-right: max(20px, env(safe-area-inset-right, 0px));
        padding-left: max(20px, env(safe-area-inset-left, 0px));
    }

    .lg-card:not(.lg-legal) {
        max-width: 420px;
        padding: 8px 0;
        margin-block: auto;
    }

    .lg-input {
        margin-bottom: 12px;
    }

    .lg-divider {
        margin: 16px 0 12px;
    }

    .lg-quick {
        flex-direction: row;
        gap: 8px;
        min-height: 44px;
    }

    .lg-quick-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}

/* Login refinement: language, guest access and a one-line legal introduction. */
.lg-language {
    position: fixed;
    top: calc(12px + env(safe-area-inset-top, 0px));
    left: max(14px, env(safe-area-inset-left, 0px));
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 3px;
    border: 1px solid #d7dbd3;
    border-radius: 999px;
    background: #f5f6f2;
    color: var(--lg-ink-3);
    font-size: 13px;
}
.lg-language button {
    min-height: 44px;
    min-width: 48px;
    padding: 0 8px;
    border: 1px solid transparent;
    border-radius: 999px;
    background: transparent;
    color: var(--lg-ink-2);
    font: inherit;
    cursor: pointer;
}
.lg-language button[aria-pressed="true"] { background: #fff; border-color: #d7dbd3; color: var(--lg-ink); font-weight: 600; }
.lg-language button:focus-visible { outline: 2px solid var(--lg-green-deep); outline-offset: 1px; border-radius: 6px; }
.lg-guest-action { position: relative; }
.lg-guest-action[hidden] { display: none; }
.lg-guest-action .lg-cat { bottom: auto; top: 2px; transform: translateY(calc(-100% + 3px)); }
.lg-guest-note { margin-bottom: 0; font-size: 13px; line-height: 1.65; color: var(--lg-ink-2); text-align: center; }
.lg-guest-note { margin-top: 14px; }
.lg-login-btn { letter-spacing: 1px; }
.lg-agree-card { width: 100%; padding: 12px 10px; }
.lg-agree { gap: 6px; }
.lg-agree input { width: 16px; height: 16px; }
.lg-agree-first .lg-agree-text { white-space: nowrap; }
.lg-agree-first { font-size: 13px; }
.lg-agree-first a { display: inline; margin-inline: 3px; }
.lg-agree-card label { display: inline; }
.lg-install-card { max-width: 480px; padding: 12px; display: flex; flex-direction: column; overflow: hidden; }
.lg-install-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-shrink: 0; }
.lg-install-heading h3 { margin: 0; padding-left: 8px; text-align: left; }
.lg-install-close { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 12px; background: transparent; color: var(--lg-ink); cursor: pointer; flex-shrink: 0; }
.lg-install-close:hover { background: #f5f6f2; }
.lg-install-guide { min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
.lg-install-guide a { display: block; cursor: zoom-in; }
.lg-install-guide img { display: block; width: 100%; height: auto; }
::selection { background: #dce5d8; color: #354330; }
@media (max-width: 360px) {
    body.lg-body:not(.lg-body-doc) { padding-inline: 16px; }
    .lg-agree-first { font-size: 12.5px; }
    html[lang="en"] .lg-agree-first { font-size: 12px; }
    html[lang="en"] .lg-a2hs { font-size: 12px; padding-inline: 10px; }
}
@media (min-width: 601px) {
    body.lg-body:not(.lg-body-doc) { padding-block: 64px 24px; }
    .lg-card:not(.lg-legal) { max-width: 450px; padding: 24px; }
    .lg-logo { margin-bottom: 52px; }
    .lg-logo img { width: 104px; height: 104px; }
    .lg-logo p { margin: 0; }
    .lg-logo::before { top: 108px; }
    .lg-quick { flex-direction: row; gap: 10px; min-height: 44px; }
    .lg-quick-icon { width: 36px; height: 36px; }
    .lg-a2hs { right: 28px; }
    .lg-language { left: 28px; }
}

/* ===================================================
   触屏适配：输入框抬到 16px 根除 iOS 聚焦自动放大整页
  （chat.css 的 pointer:coarse 块管不到登录/找回密码页）；
   小号链接放大到可读
   =================================================== */
@media (pointer: coarse) {
    .lg-input input {
        font-size: 16px;
    }

    .lg-input > i {
        font-size: 1rem;
    }

    .lg-code-btn,
    .lg-links,
    .lg-register-link {
        font-size: 0.85rem;
    }
}