/* ===================================================
   main_style.css — 全站共用樣式（語意命名，非頁面專屬）
   AI智慧醫療導航與掛號平台 · Light Medical Tech Theme
   2026-04-16
   ---
   CSS 命名慣例：
     - 頁面專屬樣式跟 HTML 同名：ai_search.css / register.css / waittime.css /
       doctor_suggestion.css / hospital_card.css / selection.css
     - 共用元件保留語意命名：main_style.css（layout/header/footer/modal/toast/skeleton）
=================================================== */

/* =====================
   CSS Variables
===================== */
:root {
    --bg-primary:    #eef3fb;
    --bg-surface:    #ffffff;
    --bg-card:       #ffffff;
    --bg-card-hover: #f0f7ff;

    --color-primary:   #0a74da;
    --color-secondary: #00a896;
    --color-warning:   #f59e0b;

    --text-primary:   #1a2a4f;
    --text-secondary: #4a6a8a;
    --text-muted:     #8faabb;

    --border-color: rgba(10, 116, 218, 0.14);
    --border-glow:  rgba(10, 116, 218, 0.40);

    --shadow-card: 0 2px 16px rgba(10, 116, 218, 0.08);
    --shadow-glow: 0 0 24px rgba(10, 116, 218, 0.10);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --header-height: 62px;

    --transition: all 0.25s ease;
}

/* =====================
   Reset
===================== */
*, *::before, *::after { box-sizing: border-box; }

/* =====================
   Body
===================== */
body {
    margin: 0;
    font-family: "Noto Sans TC", "Segoe UI", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* =====================
   Container
===================== */
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    position: relative;
    z-index: 3;
    background-color: transparent;
}

/* =====================
   HEADER
===================== */
.header_box {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    padding: 10px 24px;
    height: var(--header-height);
    border-bottom: 2px solid var(--color-primary);
    box-shadow: 0 2px 12px rgba(10, 116, 218, 0.10);
    color: var(--text-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.image_box a img {
    height: 42px;
    margin-right: 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    vertical-align: middle;
}

.image_box a img:hover {
    transform: scale(1.07);
    box-shadow: 0 0 10px rgba(10, 116, 218, 0.25);
}

.header_text { transition: var(--transition); }

.header_text a {
    text-decoration: none;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--color-primary);
}

.header_text:hover { transform: scale(1.02); }

/* =====================
   NAV
===================== */
.content_list {
    width: 100%;
    display: flex;
    justify-content: center;
    background: #ffffff;
    border-bottom: 1px solid #dce7f7;
    box-shadow: 0 2px 6px rgba(10, 116, 218, 0.06);
    position: sticky;
    top: var(--header-height);
    z-index: 999;
    overflow: hidden;
}

.menu_list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
}

.menu_list li { margin: 0; border-bottom: none; }
.menu_list li:last-child { border-bottom: none; }

.menu_list a {
    display: block;
    padding: 13px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.88rem;
    letter-spacing: 0.3px;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
    background: transparent;
    border-radius: 0;
}

.menu_list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.28s ease;
    border-radius: 2px 2px 0 0;
}

.menu_list a:hover {
    color: var(--color-primary);
    background: rgba(10, 116, 218, 0.05);
    transform: none;
}

.menu_list a:hover::after,
.menu_list a.active::after { width: 70%; }

.menu_list a.active { color: var(--color-primary); }

/* =====================
   MAIN CONTENT BOX
===================== */
.content_box {
    flex-grow: 1;
    margin: 24px auto 40px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 960px;
    width: 95%;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid #dce7f7;
    box-shadow: var(--shadow-card);
    padding: 32px 40px;
    word-wrap: break-word;
}

/* =====================
   INTRO / GOAL BLOCKS
===================== */
.content_intro, .content_goal, .content_tutorial {
    max-width: 820px;
    width: 100%;
    margin-bottom: 28px;
    background: linear-gradient(135deg, rgba(10,116,218,0.05), rgba(0,168,150,0.03));
    border: 1px solid #dce7f7;
    border-radius: var(--radius-md);
    padding: 22px 28px 22px 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.content_intro::before, .content_goal::before, .content_tutorial::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 4px 0 0 4px;
}

.content_intro:hover, .content_goal:hover, .content_tutorial:hover {
    border-color: var(--border-glow);
    box-shadow: 0 4px 16px rgba(10, 116, 218, 0.10);
    background: linear-gradient(135deg, rgba(10,116,218,0.08), rgba(0,168,150,0.05));
}

.content_intro h2, .content_goal h2, .content_tutorial h2 {
    color: var(--color-primary);
    margin: 0 0 14px 0;
    font-size: 1.25rem;
    text-align: left;
    letter-spacing: 0.3px;
}

.content_intro p, .content_goal p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 0.95rem;
    text-align: left;
    margin: 0;
}

.content_intro .intro_lead {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

.intro_features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px 22px;
}

.intro_features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid transparent;
    transition: var(--transition);
}

.intro_features li:hover {
    border-color: var(--border-glow);
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-1px);
}

.intro_features .feat_icon {
    font-size: 1.4rem;
    line-height: 1.4;
    flex-shrink: 0;
}

.intro_features li > div {
    display: flex;
    flex-direction: column;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
}

.intro_features li strong {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
}

/* =====================
   TUTORIAL SECTION (main_page)
===================== */
.tutorial_steps {
    list-style: none;
    padding: 0;
    margin: 0 0 22px 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.tutorial_steps li {
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid #dce7f7;
    border-radius: var(--radius-sm);
    padding: 16px 12px 14px 12px;
    text-align: center;
    transition: var(--transition);
}

.tutorial_steps li:hover {
    border-color: var(--border-glow);
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
}

.tutorial_steps li:not(:last-child)::after {
    content: '→';
    position: absolute;
    top: 50%;
    right: -11px;
    transform: translateY(-50%);
    color: var(--color-primary);
    font-size: 1.1rem;
    font-weight: 700;
    z-index: 1;
}

.tutorial_steps .step_num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    margin-bottom: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(10, 116, 218, 0.25);
}

.tutorial_steps .step_body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tutorial_steps .step_body strong {
    color: var(--text-primary);
    font-size: 0.98rem;
    font-weight: 600;
}

.tutorial_steps .step_body span {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.55;
}

.tutorial_cta {
    display: block;
    width: fit-content;
    margin: 0 auto;
    padding: 11px 26px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    box-shadow: 0 2px 8px rgba(10, 116, 218, 0.20);
    transition: var(--transition);
}

.tutorial_cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(10, 116, 218, 0.30);
}

/* =====================
   FAVORITES — Menu Item & Dropdown Panel
===================== */
.fav_menu_item a { cursor: pointer; }

.fav_count_badge {
    display: inline-block;
    min-width: 18px;
    height: 18px;
    padding: 0 6px;
    margin-left: 6px;
    background: #e53935;
    color: #fff;
    border-radius: 9px;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 18px;
    text-align: center;
    vertical-align: middle;
    box-sizing: border-box;
}
.fav_count_badge[hidden] { display: none; }

.fav_panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 12px;
    width: 360px;
    max-width: calc(100vw - 24px);
    background: #fff;
    border: 1px solid #dce7f7;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 32px rgba(10, 116, 218, 0.18);
    z-index: 1002;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}
.fav_panel.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.fav_panel_header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: linear-gradient(135deg, rgba(10,116,218,0.06), rgba(0,168,150,0.04));
    border-bottom: 1px solid #dce7f7;
}
.fav_panel_header h3 {
    margin: 0;
    font-size: 0.98rem;
    color: var(--color-primary);
    font-weight: 600;
}
.fav_panel_close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    line-height: 1;
}
.fav_panel_close:hover { background: rgba(10,116,218,0.08); color: var(--color-primary); }

.fav_panel_list {
    max-height: 440px;
    overflow-y: auto;
    padding: 12px;
}
.fav_panel_list .fav_card { margin-bottom: 8px; }
.fav_panel_list .fav_card:last-child { margin-bottom: 0; }

.fav_empty {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
    padding: 20px;
    background: #f8fbff;
    border: 1px dashed #dce7f7;
    border-radius: var(--radius-md);
    margin: 0;
}

.fav_card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border: 1px solid #dce7f7;
    border-radius: var(--radius-md);
    background: #fff;
    margin-bottom: 10px;
    transition: var(--transition);
    gap: 12px;
}

.fav_card:hover {
    border-color: rgba(10, 116, 218, 0.35);
    box-shadow: 0 4px 14px rgba(10, 116, 218, 0.10);
}

.fav_card_info { flex: 1; min-width: 0; }

.fav_name {
    font-size: 0.97rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.fav_meta {
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-bottom: 2px;
}

.fav_addr {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.fav_card_actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.fav_btn_map {
    background: linear-gradient(135deg, #0a74da, #1a9bff);
    color: #fff;
    text-decoration: none;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    text-align: center;
    transition: var(--transition);
}

.fav_btn_map:hover { opacity: 0.85; }

.fav_btn_remove {
    background: none;
    border: 1px solid #f5c6cb;
    color: #d9534f;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    cursor: pointer;
    transition: var(--transition);
}

.fav_btn_remove:hover { background: #f8d7da; }

/* =====================
   TOAST 通知（非阻塞）
===================== */
.toast_container {
    position: fixed;
    top: calc(var(--header-height) + 16px);
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
    max-width: calc(100vw - 32px);
}

.toast {
    min-width: 220px;
    max-width: 360px;
    padding: 12px 16px;
    background: #fff;
    border: 1px solid #dce7f7;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 16px rgba(10, 116, 218, 0.18);
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.5;
    pointer-events: auto;
    animation: toast_in 0.3s ease;
    word-break: break-word;
}

.toast_success { border-left-color: #16a34a; }
.toast_error   { border-left-color: #dc2626; }
.toast_info    { border-left-color: var(--color-primary); }
.toast_warning { border-left-color: var(--color-warning); }

.toast.toast_out { animation: toast_out 0.3s ease forwards; }

@keyframes toast_in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast_out {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(20px); }
}

/* =====================
   CONFIRM MODAL（取代瀏覽器原生 confirm）
===================== */
.confirm_overlay {
    position: fixed;
    inset: 0;
    background: rgba(20, 30, 50, 0.45);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: confirm_fade 0.2s ease;
    padding: 16px;
}

.confirm_box {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 22px 26px;
    max-width: 420px;
    width: 100%;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    animation: confirm_pop 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.confirm_title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.confirm_msg {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 22px;
    white-space: pre-line;
}

.confirm_actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.confirm_btn {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid #dce7f7;
    background: #fff;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}
.confirm_btn:hover { background: #f0f7ff; color: var(--color-primary); }

.confirm_btn_primary {
    background: linear-gradient(135deg, var(--color-primary), #1a9bff);
    color: #fff;
    border-color: transparent;
}
.confirm_btn_primary:hover { background: var(--color-primary); color: #fff; opacity: 0.92; }

@keyframes confirm_fade {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes confirm_pop {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}

/* =====================
   SKELETON LOADING（全頁共用）
===================== */
.skeleton_block {
    background: linear-gradient(90deg, #e8f0fb 25%, #f4f8ff 50%, #e8f0fb 75%);
    background-size: 200% 100%;
    animation: skeleton_shimmer 1.4s infinite linear;
    border-radius: 6px;
    flex-shrink: 0;
}

@keyframes skeleton_shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* AI 推薦頁 / 自助查詢頁 醫院卡 skeleton */
.skeleton_card {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border: 1px solid #dce7f7;
    border-radius: var(--radius-md);
    background: #fff;
    gap: 16px;
    overflow: hidden;
    margin-bottom: 8px;
}

.skeleton_icon { width: 40px; height: 40px; border-radius: 50%; }
.skeleton_body { flex: 1; display: flex; flex-direction: column; gap: 9px; }
.skeleton_line { height: 11px; }
.skeleton_line.w70 { width: 70%; }
.skeleton_line.w50 { width: 50%; }
.skeleton_line.w35 { width: 35%; }
.skeleton_side { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; min-width: 68px; }
.skeleton_btn  { width: 56px; height: 28px; border-radius: var(--radius-sm); }

/* waittime / register 頁 醫院 pick card skeleton */
.skeleton_pick_card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: #fff;
    border: 1.5px solid #dce7f7;
    border-radius: var(--radius-md);
    margin-bottom: 8px;
    box-shadow: 0 1px 4px rgba(10, 116, 218, 0.04);
}
.skeleton_pick_body { flex: 1; min-width: 0; }
.skeleton_pick_tag {
    width: 90px;
    height: 22px;
    border-radius: 12px;
    margin-left: 16px;
}

/* 醫師推薦頁卡片 skeleton */
.skeleton_doctor_card {
    background: #fff;
    border: 1px solid #dce7f7;
    border-radius: var(--radius-md);
    padding: 20px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 2px 10px rgba(10, 116, 218, 0.06);
}
.skeleton_avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
}

/* =====================
   STEP FADE 過渡動畫
===================== */
@keyframes step_fade_in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

#wt_step_city, #wt_step_district, #wt_step_hospital, #wt_step_waittime,
#reg_city_step, #reg_district_step, #reg_hospital_step, #reg_dept_step,
#selection_buttons, #recommendation_results {
    animation: step_fade_in 0.28s ease;
}

/* =====================
   FOOTER
===================== */
.footer_box {
    margin-top: auto;
    width: 100%;
    background: #1a2a4f;
    border-top: none;
    text-align: center;
    padding: 16px;
    font-size: 0.82rem;
    color: #8faabb;
    letter-spacing: 0.5px;
}

/* =====================
   MODAL
===================== */
.modal_overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(26, 42, 79, 0.55);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal_content {
    background: #ffffff;
    border: 1px solid #dce7f7;
    padding: 28px 32px;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 580px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(10, 116, 218, 0.15);
    position: relative;
    animation: modalFadeIn 0.25s ease;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) #f0f5fb;
}

.modal_content::-webkit-scrollbar { width: 5px; }
.modal_content::-webkit-scrollbar-track { background: #f0f5fb; }
.modal_content::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 4px; }

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

.modal_close {
    position: absolute;
    top: 16px; right: 20px;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
    line-height: 1;
}

.modal_close:hover { color: var(--text-primary); }

#modal_body {
    margin-top: 14px;
    line-height: 1.9;
    color: var(--text-secondary);
    font-size: 0.93rem;
    white-space: pre-line;
}

/* =====================
   SCRAPED CONTENT
===================== */
.scraped_content {
    text-align: left !important;
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--text-secondary);
    padding: 8px 4px;
}

.scraped_content [class] { padding: 0 !important; margin: 0 !important; }

.scraped_content ol,
.scraped_content ul {
    padding-left: 22px !important;
    margin-top: 8px !important;
    margin-bottom: 12px !important;
}

.scraped_content li { margin-bottom: 8px !important; list-style-position: outside !important; }

.scraped_content b,
.scraped_content strong {
    color: var(--color-primary);
    display: inline-block;
    margin-top: 8px !important;
    font-size: 0.93rem;
}

.scraped_content div { margin-bottom: 4px !important; }

.scraped_content table, .scraped_content tbody,
.scraped_content tr, .scraped_content td, .scraped_content th {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
}

.scraped_content td, .scraped_content th {
    padding: 4px 0 !important;
    border: none !important;
    text-align: left !important;
}

.scraped_content td:empty { display: none !important; }
.scraped_content img { max-width: 100% !important; height: auto !important; }

.scraped_content * {
    text-indent: 0 !important;
    word-break: break-word !important;
}

.scraped_content p, .scraped_content div,
.scraped_content span, .scraped_content section {
    margin-left: 0 !important; padding-left: 0 !important;
    margin-right: 0 !important; padding-right: 0 !important;
    text-align: left !important;
}

.scraped_content ul, .scraped_content ol {
    padding-left: 22px !important;
    margin-left: 0 !important;
}

.scraped_content,
.scraped_content div,
.scraped_content table,
.scraped_content tbody {
    overflow-y: visible !important;
    height: auto !important;
    max-height: none !important;
}

/* =====================
   HAMBURGER BUTTON
===================== */
.nav_toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px 10px;
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}
.nav_toggle:hover { background: rgba(10,116,218,0.08); }
.nav_toggle:focus { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.nav_toggle .bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-primary);
    margin: 5px 0;
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav_toggle.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav_toggle.open .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav_toggle.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================
   MAP PAGE BACKGROUND (manul_select)
===================== */
#map_background_container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
}

#manual_google_map {
    width: 100%;
    height: 100%;
}

.content_overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(240, 245, 251, 0.82);
    z-index: 1;
    pointer-events: none;
}

/* =====================
   RWD — TABLET (≤ 768px)
   Nav 折疊為漢堡下拉選單
===================== */
@media (max-width: 768px) {
    .nav_toggle { display: block; }
    .fav_panel { right: 8px; width: calc(100vw - 16px); }

    .content_list {
        overflow: hidden;
        max-height: 0;
        justify-content: flex-start;
        padding: 0;
        box-shadow: none;
        transition: max-height 0.32s cubic-bezier(0.4, 0, 0.2, 1),
                    box-shadow 0.32s ease;
    }
    .content_list.open {
        max-height: 420px;
        box-shadow: 0 6px 20px rgba(10, 116, 218, 0.13);
    }

    .menu_list {
        flex-direction: column;
        width: 100%;
    }
    .menu_list li { border-bottom: 1px solid #f0f5fb; }
    .menu_list li:last-child { border-bottom: none; }

    .menu_list a {
        padding: 15px 24px;
        font-size: 0.93rem;
        white-space: normal;
    }
    .menu_list a::after { display: none; }
    .menu_list a.active {
        background: rgba(10, 116, 218, 0.08);
        color: var(--color-primary);
        border-left: 3px solid var(--color-primary);
        padding-left: 21px;
    }
    .menu_list a:hover {
        background: rgba(10, 116, 218, 0.05);
        padding-left: 28px;
    }

    .content_box { padding: 20px 20px; }

    .tutorial_steps { grid-template-columns: repeat(2, 1fr); }
    .tutorial_steps li:nth-child(2)::after { display: none; }
    .tutorial_steps li:nth-child(2n)::after { display: none; }
}

/* =====================
   RWD — MOBILE (≤ 480px)
===================== */
@media (max-width: 480px) {
    :root { --header-height: 54px; }

    .image_box a img { height: 32px; margin-right: 8px; }
    .header_text a   { font-size: 0.88rem; letter-spacing: 0; }
    .nav_toggle      { right: 12px; }

    .content_box { padding: 14px 12px; }
    .content_intro, .content_goal { padding: 14px 14px 14px 18px; }
    .content_intro h2, .content_goal h2 { font-size: 1.05rem; }
    .content_intro p,  .content_goal p  { font-size: 0.88rem; line-height: 1.8; }
    .intro_features { grid-template-columns: 1fr; gap: 8px; }
    .intro_features li { padding: 8px 10px; }
    .intro_features .feat_icon { font-size: 1.2rem; }
    .intro_features li > div { font-size: 0.85rem; }
    .intro_features li strong { font-size: 0.9rem; }

    .tutorial_steps { grid-template-columns: 1fr; gap: 22px; }
    .tutorial_steps li { padding: 14px 12px; }
    .tutorial_steps li::after,
    .tutorial_steps li:nth-child(2n)::after { display: block !important; }
    .tutorial_steps li:not(:last-child)::after {
        content: '↓';
        top: auto;
        bottom: -18px;
        right: 50%;
        transform: translateX(50%);
    }
    .tutorial_cta { padding: 10px 20px; font-size: 0.9rem; }
}