:root {
    --field-ink: #173222;
    --field-muted: #68766d;
    --field-green: #245c3c;
    --field-green-strong: #174a2d;
    --field-green-soft: #e5eee3;
    --field-sage: #d5e2cf;
    --field-canvas: #f3f6ef;
    --field-surface: #ffffff;
    --field-line: #dfe7dc;
    --field-warm: #f0eadb;
    --field-danger: #bd4d45;
    --field-shadow: 0 8px 28px rgba(31, 68, 43, .08);
    --field-shadow-soft: 0 3px 14px rgba(31, 68, 43, .055);
}

html { color-scheme: light; }
body {
    color: var(--field-ink);
    background: var(--field-canvas);
    font-family: Inter, "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
button, [onclick], select { -webkit-tap-highlight-color: transparent; }
button { transition: transform .16s ease, background-color .16s ease, box-shadow .16s ease; }
button:active { transform: scale(.98); }

/* 首页 */
body[data-page="home"] .container { max-width: 520px; padding-top: 26px; }
body[data-page="home"] .weather-card {
    background: var(--field-green);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 14px 32px rgba(36, 92, 60, .18);
}
body[data-page="home"] .weather-left .temp { font-size: 42px; letter-spacing: -2px; }
body[data-page="home"] .city-name { text-decoration: none; font-weight: 600; }
body[data-page="home"] .expand-7day,
body[data-page="home"] .seven-day-panel { background: rgba(255,255,255,.12); }
body[data-page="home"] .lang-row,
body[data-page="home"] .user-card,
body[data-page="home"] .menu-item,
body[data-page="home"] .msg-item {
    border: 1px solid var(--field-line);
    box-shadow: var(--field-shadow-soft);
}
body[data-page="home"] .lang-row { border-radius: 18px; }
body[data-page="home"] .lang-current,
body[data-page="home"] .user-score { background: var(--field-green-soft); color: var(--field-green); }
body[data-page="home"] .func-grid { grid-template-columns: 1fr; gap: 12px; }
body[data-page="home"] .func-card {
    display: grid;
    grid-template-columns: 58px 1fr 24px;
    align-items: center;
    gap: 16px;
    min-height: 92px;
    padding: 16px 18px;
    text-align: left;
    border: 1px solid var(--field-line);
    border-radius: 20px;
    background: var(--field-surface) !important;
    box-shadow: var(--field-shadow-soft);
}
body[data-page="home"] .func-card::after { content: "›"; grid-column: 3; grid-row: 1 / 3; align-self: center; color: var(--field-green); font-size: 30px; font-weight: 300; }
body[data-page="home"] .func-icon {
    grid-column: 1; grid-row: 1 / 3;
    width: 58px; height: 58px; margin: 0; border-radius: 17px;
    background: var(--field-green-soft) !important; color: var(--field-green) !important;
}
body[data-page="home"] .func-title { grid-column: 2; grid-row: 1; align-self: end; margin-bottom: 2px; color: var(--field-ink); }
body[data-page="home"] .func-desc { grid-column: 2; grid-row: 2; align-self: start; color: var(--field-muted); }
body[data-page="home"] .home-farm-alert {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 14px;
    margin: -8px 0 24px;
    padding: 18px;
    border: 1px solid var(--field-line);
    border-radius: 20px;
    box-shadow: var(--field-shadow-soft);
}
body[data-page="home"] .home-alert-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 15px;
    background: rgba(255,255,255,.62);
    font-size: 27px;
}
body[data-page="home"] .home-alert-content { min-width: 0; }
body[data-page="home"] .home-alert-label {
    margin-bottom: 4px;
    color: var(--field-green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
}
body[data-page="home"] .home-alert-title { font-size: 17px; font-weight: 700; }
body[data-page="home"] .home-alert-tip { margin-top: 4px; color: #3e4a42; line-height: 1.5; }
body[data-page="home"] .home-alert-weather { margin-top: 8px; color: var(--field-muted); font-size: 13px; }
body[data-page="home"] .page-title { color: var(--field-ink); letter-spacing: -1px; }
body[data-page="home"] .page-subtitle { color: var(--field-muted); }
body[data-page="home"] .user-avatar { background: var(--field-green); }
body[data-page="home"] .logout-btn { border-color: #d9aaa5; color: var(--field-danger); }
body[data-page="home"] .tab-bar-bottom {
    max-width: 520px;
    border-top: 1px solid var(--field-line);
    box-shadow: 0 -8px 26px rgba(31, 68, 43, .07);
}
body[data-page="home"] .tab-bottom-item { color: #7c887f; }
body[data-page="home"] .tab-bottom-item.active { color: var(--field-green); font-weight: 600; }

/* 登录 */
body[data-page="login"] { background: var(--field-canvas); }
body[data-page="login"]::before {
    content: ""; position: fixed; inset: 0; pointer-events: none;
    background: radial-gradient(circle at 50% 0, rgba(117, 154, 110, .18), transparent 42%);
}
body[data-page="login"] .logo-wrap,
body[data-page="login"] .login-card,
body[data-page="login"] .lang-panel { position: relative; }
body[data-page="login"] .logo-circle { width: 82px; height: 82px; background: transparent; border-radius: 0; box-shadow: none; }
body[data-page="login"] .logo-circle img { width: 100%; height: 100%; object-fit: contain; }
body[data-page="login"] .logo-title { color: var(--field-ink); }
body[data-page="login"] .logo-sub { color: var(--field-muted); }
body[data-page="login"] .login-card,
body[data-page="login"] .modal-card { border: 1px solid var(--field-line); box-shadow: var(--field-shadow); }
body[data-page="login"] .tab-item.active,
body[data-page="login"] .link-text,
body[data-page="login"] .switch-login a { color: var(--field-green); }
body[data-page="login"] .tab-item.active::after { background: var(--field-green); }
body[data-page="login"] .input-box,
body[data-page="login"] .reg-form-item input {
    background: #fafcf9; border-color: var(--field-line); color: var(--field-ink);
}
body[data-page="login"] .input-box:focus,
body[data-page="login"] .reg-form-item input:focus { outline: 3px solid rgba(36,92,60,.11); border-color: var(--field-green); }
body[data-page="login"] .login-btn,
body[data-page="login"] .btn-register { background: var(--field-green); box-shadow: 0 8px 18px rgba(36,92,60,.16); }
body[data-page="login"] .lang-btn { background: transparent; border-color: var(--field-sage); color: var(--field-green); }
body[data-page="login"] .lang-btn.active { background: var(--field-green); color: #fff; }

/* 聊天 */
body[data-page="chat"] { background: var(--field-canvas); }
body[data-page="chat"] .header-bar { background: var(--field-green); min-height: 64px; }
body[data-page="chat"] .header-title { letter-spacing: -.2px; }
body[data-page="chat"] .lang-btn,
body[data-page="chat"] .clear-btn,
body[data-page="chat"] .logout-btn,
body[data-page="chat"] .home-btn { border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.1); }
body[data-page="chat"] .lang-btn.active { background: #fff; color: var(--field-green); }
body[data-page="chat"] .tts-engine-select { color: var(--field-green); }
body[data-page="chat"] .chat-wrap { max-width: 900px; width: 100%; margin: 0 auto; }
body[data-page="chat"] .msg-bubble { border-radius: 18px; }
body[data-page="chat"] .msg-ai .msg-bubble { border: 1px solid var(--field-line); color: var(--field-ink); box-shadow: var(--field-shadow-soft); }
body[data-page="chat"] .msg-user .msg-bubble { background: var(--field-green); }
body[data-page="chat"] .tts-play-btn { color: var(--field-green); background: var(--field-green-soft); }
body[data-page="chat"] .input-area { border-color: var(--field-line); box-shadow: 0 -6px 22px rgba(31,68,43,.05); }
body[data-page="chat"] #chatInput { background: #fafcf9; border-color: var(--field-line); }
body[data-page="chat"] #chatInput:focus { border-color: var(--field-green); outline: 3px solid rgba(36,92,60,.1); }
body[data-page="chat"] #micBtn,
body[data-page="chat"] #sendBtn { background: var(--field-green); }

/* 病虫害识别 */
body[data-page="detect"] { background: var(--field-canvas); }
body[data-page="detect"] .container { max-width: 540px; padding-top: 28px; }
body[data-page="detect"] .back-btn { color: var(--field-green); }
body[data-page="detect"] .upload-card,
body[data-page="detect"] .result-card { border: 1px solid var(--field-line); box-shadow: var(--field-shadow); }
body[data-page="detect"] .upload-icon { width: 82px; height: 82px; margin: 0 auto 18px; display: grid; place-items: center; border-radius: 24px; background: var(--field-green-soft); }
body[data-page="detect"] .upload-icon svg { width: 38px; height: 38px; fill: none; stroke: var(--field-green); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
body[data-page="detect"] .tip-text { color: var(--field-muted); }
body[data-page="detect"] .btn { min-height: 48px; font-weight: 600; }
body[data-page="detect"] .btn.green { background: var(--field-green); }
body[data-page="detect"] .btn.blue { background: transparent; border: 1px solid var(--field-green); color: var(--field-green); }
body[data-page="detect"] .result-item { border-color: var(--field-line); }
body[data-page="detect"] .loading-text { color: var(--field-green); font-weight: 600; }
body[data-page="detect"] .loading-text::before {
    content: ""; width: 18px; height: 18px; margin-right: 9px;
    display: inline-block; vertical-align: -4px; border: 2px solid var(--field-sage);
    border-top-color: var(--field-green); border-radius: 50%; animation: field-spin .8s linear infinite;
}
body[data-page="detect"] .result-name { font-weight: 650; color: var(--field-ink); }
body[data-page="detect"] .result-confidence { margin-top: 5px; color: var(--field-muted); font-size: 14px; }
body[data-page="detect"] .result-error { color: var(--field-danger); }
body[data-page="detect"] .result-reset { width: 100%; margin-top: 16px; border: 1px solid var(--field-green); background: transparent; color: var(--field-green); }
@keyframes field-spin { to { transform: rotate(360deg); } }

/* 病虫害识别工作台 */
body[data-page="detect"] { min-height: 100vh; }
body[data-page="detect"] .container { max-width: 980px; padding: 34px 22px 56px; }
body[data-page="detect"] .header-bar { margin-bottom: 30px; }
body[data-page="detect"] .page-title { font-size: 25px; letter-spacing: -.5px; }
body[data-page="detect"] .detect-hero { max-width: 680px; margin-bottom: 26px; }
body[data-page="detect"] .detect-eyebrow {
    display: inline-flex; margin-bottom: 9px; color: var(--field-green);
    font-size: 12px; font-weight: 800; letter-spacing: .14em;
}
body[data-page="detect"] .detect-hero h1 { margin: 0 0 9px; font-size: clamp(28px, 4vw, 40px); line-height: 1.15; letter-spacing: -1.2px; }
body[data-page="detect"] .detect-hero p { color: var(--field-muted); font-size: 16px; line-height: 1.7; }
body[data-page="detect"] .detect-workspace { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .8fr); gap: 20px; align-items: stretch; }
body[data-page="detect"] .upload-card { margin: 0; padding: 28px; text-align: left; border-radius: 24px; }
body[data-page="detect"] .upload-kicker,
body[data-page="detect"] .guide-kicker { display: flex; align-items: center; gap: 9px; color: var(--field-green); font-size: 13px; font-weight: 750; }
body[data-page="detect"] .upload-kicker span:first-child,
body[data-page="detect"] .guide-kicker span:first-child { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 9px; background: var(--field-green-soft); font-size: 11px; }
body[data-page="detect"] .upload-icon { width: 74px; height: 74px; margin: 28px auto 14px; border-radius: 21px; }
body[data-page="detect"] .tip-text { margin-bottom: 24px; text-align: center; }
body[data-page="detect"] .field-label { margin-bottom: 8px; color: var(--field-ink); font-size: 13px; font-weight: 700; }
body[data-page="detect"] .crop-fields { margin-bottom: 16px; }
body[data-page="detect"] .crop-fields select,
body[data-page="detect"] .crop-fields input { min-height: 50px; border-radius: 13px; }
body[data-page="detect"] .btn { border-radius: 13px; }
body[data-page="detect"] .upload-helper { margin-top: 12px; color: var(--field-muted); font-size: 12px; line-height: 1.5; text-align: center; }
body[data-page="detect"] .capture-guide {
    padding: 28px; display: flex; flex-direction: column;
    border: 1px solid var(--field-line); border-radius: 24px;
    background: linear-gradient(160deg, #edf5e9, #f8faf5 65%);
    box-shadow: var(--field-shadow-soft);
}
body[data-page="detect"] .guide-visual { width: 150px; height: 150px; margin: 24px auto 16px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.72); }
body[data-page="detect"] .guide-visual svg { width: 108px; fill: none; stroke: var(--field-green); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
body[data-page="detect"] .capture-guide ul { display: grid; gap: 13px; margin: 8px 0 22px; padding: 0; list-style: none; }
body[data-page="detect"] .capture-guide li { position: relative; padding-left: 24px; color: #3f5145; line-height: 1.55; }
body[data-page="detect"] .capture-guide li::before { content: "✓"; position: absolute; left: 0; color: var(--field-green); font-weight: 800; }
body[data-page="detect"] .guide-note { margin-top: auto; padding: 13px; border-radius: 12px; background: rgba(255,255,255,.72); color: var(--field-muted); font-size: 12px; line-height: 1.55; }
body[data-page="detect"] .loading-text,
body[data-page="detect"] .result-card { grid-column: 1 / -1; }
body[data-page="detect"] .result-card { max-width: none; margin-top: 20px; }

@media (max-width: 760px) {
    body[data-page="detect"] .container { padding: max(16px, env(safe-area-inset-top)) 14px 32px; }
    body[data-page="detect"] .header-bar { margin-bottom: 22px; }
    body[data-page="detect"] .detect-hero { margin-bottom: 20px; }
    body[data-page="detect"] .detect-hero h1 { font-size: 29px; }
    body[data-page="detect"] .detect-hero p { font-size: 14px; }
    body[data-page="detect"] .detect-workspace { grid-template-columns: 1fr; }
    body[data-page="detect"] .upload-card,
    body[data-page="detect"] .capture-guide { padding: 20px; border-radius: 19px; }
    body[data-page="detect"] .capture-guide { min-height: 0; }
    body[data-page="detect"] .guide-visual { display: none; }
    body[data-page="detect"] .capture-guide ul { margin-top: 20px; }
}

@media (max-width: 430px) {
    body[data-page="detect"] .crop-fields { grid-template-columns: 1fr; }
    body[data-page="detect"] .btn-group { flex-direction: column; }
}

/* 协议与隐私 */
body[data-page="legal"] { background: var(--field-canvas); color: var(--field-ink); }
body[data-page="legal"] .header-bar { padding-left: max(20px, calc((100% - 720px) / 2)); padding-right: max(20px, calc((100% - 720px) / 2)); border-color: var(--field-line); }
body[data-page="legal"] .logo-icon { overflow: hidden; background: transparent; border-radius: 10px; }
body[data-page="legal"] .logo-icon img { width: 100%; height: 100%; display: block; object-fit: contain; }
body[data-page="legal"] .back-btn { color: var(--field-green); }
body[data-page="legal"] .container { border: 1px solid var(--field-line); box-shadow: var(--field-shadow); }
body[data-page="legal"] h1 { color: var(--field-ink); }
body[data-page="legal"] h2 { color: var(--field-green); border-color: var(--field-green); }
body[data-page="legal"] .tip-box { background: var(--field-green-soft); border-color: var(--field-sage); color: var(--field-green-strong); }
body[data-page="legal"] p { color: #3e4a42; }
body[data-page="legal"] .lang-btn { border-color: var(--field-sage); background: #f7faf5; color: var(--field-green); }
body[data-page="legal"] .lang-btn.active { background: var(--field-green); color: #fff; }

@media (max-width: 720px) {
    body[data-page="home"] .container,
    body[data-page="detect"] .container { padding-top: max(16px, env(safe-area-inset-top)); }
    body[data-page="chat"] .header-bar { padding-top: max(10px, env(safe-area-inset-top)); }
    body[data-page="legal"] .container { border-left: 0; border-right: 0; }
}

/* 首页天气与桌面响应式布局 */
body[data-page="home"] { padding-bottom: 108px; }
body[data-page="home"] .container { padding-bottom: 32px; }
body[data-page="home"] .weather-right { display: grid; justify-items: end; }
body[data-page="home"] .weather-symbol {
    width: 42px; height: 42px; margin-bottom: 8px; display: grid; place-items: center;
    color: rgba(255,255,255,.9);
}
body[data-page="home"] .weather-symbol svg,
body[data-page="home"] .day-weather-icon svg,
body[data-page="home"] .weather-meta svg,
body[data-page="home"] .lang-left svg {
    fill: none; stroke: currentColor; stroke-width: 1.7;
    stroke-linecap: round; stroke-linejoin: round;
}
body[data-page="home"] .weather-symbol svg { width: 38px; height: 38px; }
body[data-page="home"] .weather-meta span { display: inline-flex; align-items: center; gap: 5px; }
body[data-page="home"] .weather-meta svg { width: 17px; height: 17px; }
body[data-page="home"] .air-badge { padding: 4px 9px; border-radius: 999px; background: rgba(255,255,255,.11); }
body[data-page="home"] .lang-left svg { width: 21px; height: 21px; color: var(--field-green); }
body[data-page="home"] .day-weather { display: flex; align-items: center; gap: 7px; }
body[data-page="home"] .day-weather-icon { width: 22px; height: 22px; display: inline-grid; place-items: center; }
body[data-page="home"] .day-weather-icon svg { width: 21px; height: 21px; }

@media (min-width: 1024px) {
    body[data-page="home"] .container { max-width: 640px; padding: 32px 20px 48px; }
    body[data-page="home"] #pageHome.active { display: block; }
    body[data-page="home"] #pageHome .weather-card { margin-bottom: 16px; min-height: 0; }
    body[data-page="home"] #pageHome .lang-row { margin-bottom: 20px; }
    body[data-page="home"] #pageHome .func-grid { margin-bottom: 24px; }
    body[data-page="home"] #pageMsg,
    body[data-page="home"] #pageMine { max-width: 640px; margin: 0 auto; }
    body[data-page="home"] .seven-day-panel:not([hidden]) {
        display: block !important;
        padding: 12px;
        background: rgba(255,255,255,.12);
    }
    body[data-page="home"] .day-item {
        padding: 9px 2px; display: grid;
        grid-template-columns: minmax(90px, 1fr) minmax(150px, 1.2fr) auto;
        align-items: center; gap: 12px; text-align: left;
        border-bottom: 1px solid rgba(255,255,255,.15); border-radius: 0;
        background: transparent; font-size: 14px;
    }
    body[data-page="home"] .day-item:last-child { border-bottom: 0; }
    body[data-page="home"] .day-weather { min-height: 0; flex-direction: row; justify-content: flex-start; gap: 7px; }
    body[data-page="home"] .day-date { min-height: 0; display: block; font-weight: 600; }
    body[data-page="home"] .expand-7day { width: 100%; margin-left: 0; padding: 7px 12px; display: block; }
    body[data-page="home"] .tab-bar-bottom { max-width: 640px; border-radius: 18px 18px 0 0; }
}

/* AI 回答 Markdown 排版 */
body[data-page="chat"] .markdown-content { overflow-x: auto; }
body[data-page="chat"] .markdown-content > :first-child { margin-top: 0; }
body[data-page="chat"] .markdown-content > :last-child { margin-bottom: 0; }
body[data-page="chat"] .markdown-content h1,
body[data-page="chat"] .markdown-content h2,
body[data-page="chat"] .markdown-content h3,
body[data-page="chat"] .markdown-content h4,
body[data-page="chat"] .markdown-content h5,
body[data-page="chat"] .markdown-content h6 {
    color: var(--field-ink); line-height: 1.35; font-weight: 650;
}
body[data-page="chat"] .markdown-content h1 { margin: 18px 0 10px; font-size: 22px; }
body[data-page="chat"] .markdown-content h2 { margin: 17px 0 9px; padding-bottom: 7px; border-bottom: 1px solid var(--field-line); font-size: 19px; }
body[data-page="chat"] .markdown-content h3 { margin: 15px 0 7px; font-size: 17px; }
body[data-page="chat"] .markdown-content h4,
body[data-page="chat"] .markdown-content h5,
body[data-page="chat"] .markdown-content h6 { margin: 13px 0 6px; font-size: 15px; }
body[data-page="chat"] .markdown-content p { margin: .65em 0; }
body[data-page="chat"] .markdown-content ul,
body[data-page="chat"] .markdown-content ol { margin: .7em 0; padding-left: 1.45em; }
body[data-page="chat"] .markdown-content li { margin: .38em 0; padding-left: .15em; }
body[data-page="chat"] .markdown-content li::marker { color: var(--field-green); font-weight: 700; }
body[data-page="chat"] .markdown-content a { color: var(--field-green); text-decoration-thickness: 1px; text-underline-offset: 3px; }
body[data-page="chat"] .markdown-content del { color: var(--field-muted); }
body[data-page="chat"] .markdown-content hr { height: 1px; margin: 16px 0; border: 0; background: var(--field-line); }
body[data-page="chat"] .markdown-content blockquote {
    margin: 12px 0; padding: 10px 13px; border-left: 3px solid var(--field-green);
    border-radius: 0 10px 10px 0; background: var(--field-green-soft); color: #3d5143;
}
body[data-page="chat"] .markdown-content code {
    padding: 2px 6px; border-radius: 6px; background: #eaf0e7;
    color: #244331; font-family: "Cascadia Code", Consolas, monospace; font-size: .9em;
}
body[data-page="chat"] .markdown-content pre {
    margin: 12px 0; padding: 14px 16px; overflow-x: auto;
    border-radius: 12px; background: #17251c; color: #eaf4ec;
}
body[data-page="chat"] .markdown-content pre code { padding: 0; background: transparent; color: inherit; }
body[data-page="chat"] .markdown-content table {
    width: 100%; min-width: 420px; margin: 12px 0; border-collapse: separate;
    border-spacing: 0; border: 1px solid var(--field-line); border-radius: 12px; overflow: hidden;
}
body[data-page="chat"] .markdown-content th,
body[data-page="chat"] .markdown-content td { padding: 9px 11px; border-bottom: 1px solid var(--field-line); text-align: left; vertical-align: top; }
body[data-page="chat"] .markdown-content th { background: var(--field-green-soft); color: var(--field-green-strong); font-weight: 650; }
body[data-page="chat"] .markdown-content tr:last-child td { border-bottom: 0; }
body[data-page="chat"] .markdown-content tbody tr:nth-child(even) { background: #f8faf6; }
body[data-page="chat"] .markdown-content input[type="checkbox"] { width: 16px; height: 16px; margin: 0 7px 0 0; accent-color: var(--field-green); vertical-align: -2px; }
body[data-page="chat"] .markdown-content .task-list-item { list-style: none; margin-left: -1.2em; }

body[data-page="chat"] .thinking-indicator { display: inline-flex; align-items: center; gap: 8px; color: var(--field-muted); }
body[data-page="chat"] .thinking-indicator::after {
    content: ""; width: 18px; height: 5px;
    background: radial-gradient(circle, var(--field-green) 2px, transparent 2.5px) 0 50% / 6px 6px repeat-x;
    animation: field-thinking 1s steps(3) infinite;
}
body[data-page="chat"] #sendBtn.is-stopping { background: #fff; color: var(--field-danger); border: 1px solid #d9aaa5; }
@keyframes field-thinking { 0% { opacity: .3; } 50% { opacity: 1; } 100% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* 桌面聊天布局：全宽滚动，中间内容轨道，悬浮输入器 */
body[data-page="chat"] .chat-wrap {
    max-width: none;
    width: 100%;
    margin: 0;
    padding: 24px max(20px, calc((100% - 900px) / 2));
    scrollbar-width: thin;
    scrollbar-color: rgba(36, 92, 60, .42) transparent;
}
body[data-page="chat"] .chat-wrap::-webkit-scrollbar { width: 10px; }
body[data-page="chat"] .chat-wrap::-webkit-scrollbar-track { background: transparent; }
body[data-page="chat"] .chat-wrap::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: 999px;
    background: rgba(36, 92, 60, .42);
    background-clip: padding-box;
}
body[data-page="chat"] .input-area {
    padding: 24px 20px max(18px, env(safe-area-inset-bottom));
    border-top: 0;
    background: linear-gradient(to bottom, rgba(243,246,239,0), rgba(243,246,239,.94) 34%, var(--field-canvas) 100%);
    box-shadow: none;
}
body[data-page="chat"] .composer-shell {
    width: min(100%, 820px);
    min-height: 56px;
    border-radius: 17px;
    box-shadow: 0 8px 24px rgba(31,68,43,.075);
}

@media (max-width: 720px) {
    body[data-page="chat"] .chat-wrap { padding: 14px 12px; }
    body[data-page="chat"] .input-area {
        padding: 10px 10px max(10px, env(safe-area-inset-bottom));
        background: var(--field-surface);
        border-top: 1px solid var(--field-line);
    }
    body[data-page="chat"] .composer-shell { width: 100%; box-shadow: none; }
}

@media (max-width: 370px) {
    body[data-page="home"] .func-card { grid-template-columns: 52px 1fr 18px; gap: 12px; padding-inline: 14px; }
    body[data-page="home"] .func-icon { width: 52px; height: 52px; }
}

/* 第二轮界面精修：统一图标、聊天工具栏与消息编辑器 */
body[data-page="home"] .func-icon svg,
body[data-page="home"] .tab-icon svg {
    fill: none; stroke: currentColor; stroke-width: 1.8;
    stroke-linecap: round; stroke-linejoin: round;
}
body[data-page="home"] .func-icon svg { width: 27px; height: 27px; }
body[data-page="home"] .tab-icon svg { width: 22px; height: 22px; }

body[data-page="chat"] .header-title { display: flex; align-items: center; gap: 10px; }
body[data-page="chat"] .header-title::before {
    content: none;
}
body[data-page="chat"] .brand-mark {
    width: 38px; height: 38px; flex: 0 0 38px; display: grid; place-items: center;
    border-radius: 11px; background: #fff; color: var(--field-green);
}
body[data-page="chat"] .brand-mark svg {
    width: 24px; height: 24px; fill: none; stroke: currentColor;
    stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
body[data-page="chat"] .brand-mark img { width: 30px; height: 30px; display: block; object-fit: contain; }
body[data-page="chat"] .header-title-text { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
body[data-page="chat"] .header-menu { position: relative; flex: 0 0 auto; }
body[data-page="chat"] .header-menu summary {
    min-height: 36px; padding: 7px 12px; display: flex; align-items: center;
    list-style: none; cursor: pointer; border: 1px solid rgba(255,255,255,.3);
    border-radius: 9px; background: rgba(255,255,255,.1); color: #fff; font-size: 13px;
}
body[data-page="chat"] .header-menu summary::-webkit-details-marker { display: none; }
body[data-page="chat"] .header-menu summary::after { content: "···"; margin-left: 7px; letter-spacing: 1px; }
body[data-page="chat"] .header-menu-panel {
    position: absolute; z-index: 20; top: calc(100% + 8px); right: 0;
    width: 210px; padding: 7px; display: grid; gap: 4px;
    border: 1px solid var(--field-line); border-radius: 14px;
    background: var(--field-surface); box-shadow: var(--field-shadow);
}
body[data-page="chat"] .header-menu-panel button {
    width: 100%; min-height: 40px; padding: 8px 10px; border: 0;
    border-radius: 9px; background: transparent; color: var(--field-ink); text-align: left;
}
body[data-page="chat"] .header-menu-panel button:hover { background: var(--field-green-soft); }
body[data-page="chat"] .header-menu-panel .logout-btn { color: var(--field-danger); }
body[data-page="chat"] .msg-item { position: relative; }
body[data-page="chat"] .msg-ai { padding-left: 0; }
body[data-page="chat"] .msg-ai::before { content: none; display: none; }
body[data-page="chat"] .starter-prompts { margin: 6px 0 10px; display: flex; flex-wrap: wrap; gap: 8px; }
body[data-page="chat"] .starter-prompts button {
    min-height: 38px; padding: 8px 12px; border: 1px solid var(--field-sage);
    border-radius: 12px; background: transparent; color: var(--field-green); cursor: pointer;
}
body[data-page="chat"] .starter-prompts button:hover { background: var(--field-green-soft); }
body[data-page="chat"] .input-area {
    padding: 14px 20px max(14px, env(safe-area-inset-bottom));
    border-color: var(--field-line); box-shadow: 0 -6px 22px rgba(31,68,43,.05);
}
body[data-page="chat"] .composer-shell {
    width: min(100%, 900px); min-height: 58px; margin: 0 auto;
    padding: 6px 7px 6px 18px; display: flex; align-items: center; gap: 10px;
    border: 1px solid var(--field-line); border-radius: 18px;
    background: var(--field-surface); box-shadow: var(--field-shadow-soft);
}
body[data-page="chat"] .composer-actions { display: flex; align-items: center; gap: 7px; }
body[data-page="chat"] #chatInput {
    min-width: 0; height: 44px; padding: 0; border: 0; border-radius: 0;
    background: transparent; color: var(--field-ink);
}
body[data-page="chat"] #chatInput:focus { border: 0; outline: 0; }
body[data-page="chat"] #micBtn {
    width: 42px; height: 42px; min-width: 42px; background: var(--field-green-soft); color: var(--field-green);
}
body[data-page="chat"] #sendBtn {
    width: auto; min-width: 72px; height: 44px; padding: 0 18px;
    border-radius: 13px; background: var(--field-green);
}

@media (max-width: 720px) {
    body[data-page="chat"] .brand-mark { width: 32px; height: 32px; flex-basis: 32px; border-radius: 9px; }
    body[data-page="chat"] .brand-mark svg { width: 21px; height: 21px; }
    body[data-page="chat"] .header-menu-panel { position: fixed; top: 106px; right: 12px; width: 210px; }
    body[data-page="chat"] .header-menu-panel .menu-language-options .lang-btn {
        width: auto; min-height: 34px; padding: 5px 6px;
        border: 1px solid #d5e2d8; text-align: center;
    }
    body[data-page="chat"] .input-area { padding-inline: 10px; }
    body[data-page="chat"] .composer-shell { min-height: 56px; padding-left: 14px; }
    body[data-page="chat"] #sendBtn { min-width: 60px; padding-inline: 12px; }
    body[data-page="chat"] .msg-ai { padding-left: 0; }
    body[data-page="chat"] .starter-prompts { margin-left: 0; }
}

/* 第三轮界面精修：减少无效留白并统一交互层级 */
body[data-page="home"],
body[data-page="detect"],
body[data-page="login"] {
    background:
        radial-gradient(circle at 50% -12%, rgba(142, 177, 128, .14), transparent 34rem),
        var(--field-canvas);
}

body[data-page="home"] .weather-card,
body[data-page="home"] .lang-row,
body[data-page="home"] .func-card,
body[data-page="home"] .user-card,
body[data-page="home"] .menu-item,
body[data-page="detect"] .upload-card,
body[data-page="detect"] .result-card,
body[data-page="login"] .login-card {
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

body[data-page="home"] .lang-row:hover,
body[data-page="home"] .func-card:hover,
body[data-page="home"] .menu-item:hover {
    transform: translateY(-2px);
    border-color: var(--field-sage);
    box-shadow: 0 10px 26px rgba(31, 68, 43, .10);
}

body[data-page="home"] .lang-row:active,
body[data-page="home"] .func-card:active,
body[data-page="home"] .menu-item:active { transform: translateY(0) scale(.995); }

body[data-page="home"] .page.active { animation: field-page-in .2s ease-out; }
body[data-page="home"] .page-title { font-size: clamp(27px, 4vw, 32px); }
body[data-page="home"] .page-subtitle { margin-bottom: 20px; }
body[data-page="home"] .tab-bar-bottom {
    z-index: 30;
    overflow: hidden;
    width: min(calc(100% - 28px), 610px);
    left: 50%;
    right: auto;
    bottom: max(14px, env(safe-area-inset-bottom));
    transform: translateX(-50%);
    margin: 0;
    border: 1px solid rgba(223, 231, 220, .86);
    border-radius: 22px;
    background: rgba(255, 255, 255, .90);
    backdrop-filter: blur(18px) saturate(1.2);
    -webkit-backdrop-filter: blur(18px) saturate(1.2);
    box-shadow: 0 14px 38px rgba(31, 68, 43, .16);
}
body[data-page="home"] .tab-bottom-item {
    position: relative;
    isolation: isolate;
    min-height: 72px;
    padding: 11px 0 9px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}
body[data-page="home"] .tab-bottom-item::after {
    content: "";
    position: absolute;
    inset: 8px 12px;
    z-index: 0;
    border-radius: 15px;
    background: transparent;
    transition: background-color .16s ease;
}
body[data-page="home"] .tab-bottom-item > * { position: relative; z-index: 1; }
body[data-page="home"] .tab-bottom-item.active::after { background: rgba(229, 238, 227, .72); }
body[data-page="home"] .tab-bottom-item.active .tab-icon { transform: translateY(-1px); }
body[data-page="home"] .tab-icon { margin-bottom: 1px; transition: transform .16s ease; }
body[data-page="home"] .region-modal-card {
    width: 100%;
    max-width: 500px;
    max-height: 86vh;
    overflow-y: auto;
    padding: 26px 22px;
    border: 1px solid var(--field-line);
    border-radius: 22px;
    background: var(--field-surface);
    box-shadow: var(--field-shadow);
}
body[data-page="home"] .region-modal-card h2 { margin: 0 0 22px; text-align: center; font-size: 23px; }
body[data-page="home"] .region-locate-btn {
    width: 100%;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    border-radius: 12px;
    background: var(--field-green);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
}
body[data-page="home"] .region-locate-btn span:first-child { font-size: 22px; line-height: 1; }
body[data-page="home"] .region-locate-btn:disabled { opacity: .62; cursor: wait; }
body[data-page="home"] .region-step-label { margin: 14px 0 7px; color: var(--field-muted); font-size: 13px; font-weight: 700; }
body[data-page="home"] .region-select,
body[data-page="home"] .region-search {
    width: 100%;
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid var(--field-line);
    border-radius: 12px;
    background: #fafcf9;
    color: var(--field-ink);
}
body[data-page="home"] .region-results { margin-top: 12px; }
body[data-page="home"] .region-results > div { transition: border-color .16s ease, background-color .16s ease; }
body[data-page="home"] .region-status { padding: 18px 10px; color: var(--field-muted); text-align: center; line-height: 1.5; }

body[data-page="detect"] .header-bar { min-height: 48px; }
body[data-page="detect"] .back-btn {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid var(--field-line);
    border-radius: 13px;
    background: rgba(255,255,255,.82);
}
body[data-page="detect"] .upload-card { padding: 36px 28px; }
body[data-page="detect"] .upload-card:hover { border-color: var(--field-sage); }
body[data-page="detect"] #previewImg {
    width: 100%;
    max-height: 440px;
    object-fit: contain;
    border: 1px solid var(--field-line);
    background: #eef2eb;
}

body[data-page="login"] .login-card { border-radius: 24px; }
body[data-page="login"] .form-label { color: var(--field-ink); }
body[data-page="login"] .agree-wrap input,
body[data-page="login"] .agree-row input { accent-color: var(--field-green); }
body[data-page="login"] .agree-wrap {
    align-items: flex-start;
    flex-wrap: wrap;
    column-gap: 5px;
    row-gap: 2px;
    line-height: 1.45;
}
body[data-page="login"] .agree-wrap input { flex: 0 0 auto; margin-top: 2px; }
body[data-page="login"] .agree-wrap .link-text { white-space: nowrap; }

button:focus-visible,
[onclick]:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid rgba(36, 92, 60, .2);
    outline-offset: 2px;
}

@keyframes field-page-in {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 宽屏导航跟随内容，避免功能区与底栏之间出现大块空白。 */
@media (min-width: 721px) {
    body[data-page="home"] {
        min-height: 100vh;
        padding-bottom: 112px;
    }
    body[data-page="home"] .container { padding-bottom: 28px; }
    body[data-page="home"] .tab-bar-bottom {
        position: fixed;
    }
}

@media (max-width: 720px) {
    body[data-page="home"] { padding-bottom: calc(98px + env(safe-area-inset-bottom)); }
    body[data-page="home"] .container { padding-bottom: 24px; }
    body[data-page="home"] .weather-card { margin-bottom: 12px; }
    body[data-page="home"] .lang-row { margin-bottom: 14px; }
    body[data-page="home"] .func-grid { margin-bottom: 8px; }
    body[data-page="home"] .func-card { min-height: 86px; }
    body[data-page="home"] .home-farm-alert { margin-top: 4px; padding: 16px; border-radius: 17px; }
    body[data-page="home"] .tab-bar-bottom {
        width: calc(100% - 20px);
        bottom: max(8px, env(safe-area-inset-bottom));
        padding-bottom: 0;
        border-radius: 19px;
    }
    body[data-page="home"] .tab-bottom-item { min-height: 66px; padding-block: 8px; }
    body[data-page="detect"] .upload-card { padding: 26px 16px; }
}