:root {
    --bg-start: #0f172a;
    --bg-end: #1e293b;
    --accent: #f59e0b;
    --accent-soft: rgba(245, 158, 11, 0.15);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --card: rgba(255, 255, 255, 0.04);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-active: rgba(245, 158, 11, 0.18);
    --card-active-border: #f59e0b;
}

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

/* 确保 hidden 属性始终生效(防止 display:flex 等覆盖) */
[hidden] { display: none !important; }

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: linear-gradient(160deg, var(--bg-start) 0%, var(--bg-end) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    line-height: 1.5;
}

.container {
    width: 100%;
    max-width: 460px;
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.hero {
    text-align: center;
}

.title {
    font-size: clamp(48px, 14vw, 72px);
    font-weight: 800;
    letter-spacing: 0.12em;
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 15px;
    letter-spacing: 0.04em;
}

.time-picker {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-label {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* 时间选择：30/60 预设 + 自选 */
.time-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.time-option {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 8px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    color: var(--text);
    font-size: 19px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    font-family: inherit;
}
.time-option:hover { border-color: rgba(255, 255, 255, 0.25); }
.time-option.active {
    background: var(--card-active);
    border-color: var(--card-active-border);
    color: var(--accent);
}
.time-chosen {
    font-size: 13px;
    color: var(--accent);
    text-align: center;
}

/* 时间轮盘（小时/分钟滚动选择） */
.wheel-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(2, 6, 23, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
}
.wheel-modal[hidden] { display: none; }
.wheel-modal-box {
    width: 320px;
    background: #1e293b;
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 24px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.wheel-title {
    font-size: 16px;
    font-weight: 700;
    text-align: center;
    color: var(--text);
}
.wheel-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 0;
}
.wheel-col {
    width: 76px;
    height: 144px;
    overflow-y: auto;
    scroll-snap-type: y mandatory;
    scrollbar-width: none;
    padding: 48px 0; /* (144-48)/2 使首尾项可居中 */
    -webkit-overflow-scrolling: touch;
}
.wheel-col::-webkit-scrollbar { display: none; }
.wheel-item {
    height: 48px;
    line-height: 48px;
    text-align: center;
    font-size: 22px;
    font-weight: 600;
    color: var(--text-muted);
    scroll-snap-align: center;
    user-select: none;
}
.wheel-highlight {
    position: absolute;
    left: 6%; right: 6%;
    top: 50%;
    transform: translateY(-50%);
    height: 48px;
    border-radius: 10px;
    background: rgba(245, 158, 11, 0.12);
    border-top: 1px solid rgba(245, 158, 11, 0.55);
    border-bottom: 1px solid rgba(245, 158, 11, 0.55);
    pointer-events: none;
}
.wheel-value {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}
.wheel-btns { display: flex; gap: 12px; }
.wheel-btn {
    flex: 1;
    padding: 12px;
    border-radius: 12px;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: filter 0.15s ease;
}
.wheel-cancel { background: var(--card); color: var(--text); border: 1px solid var(--card-border); }
.wheel-ok { background: linear-gradient(90deg, #fbbf24, #f59e0b); color: #1f2937; }
.wheel-btn:hover { filter: brightness(1.08); }

.action {
    display: flex;
    justify-content: center;
}

.start-btn {
    width: 100%;
    padding: 16px;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: #1f2937;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.2s ease, filter 0.2s ease;
    font-family: inherit;
}

.start-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    filter: brightness(1.05);
}

.start-btn:active:not(:disabled) {
    transform: translateY(0);
}

.start-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.hint {
    text-align: center;
}

.hint p {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* 探索屏：偏好区与地图之间留足间距，避免重叠 */
.view-explore {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.map-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
}

.map {
    width: 100%;
    height: 360px;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    overflow: hidden;
    background: #0b1220;
    z-index: 0;
}

.map-tip {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.04em;
}

/* Leaflet 控件配色适配暗色主题 */
.leaflet-container {
    background: #0b1220;
    font-family: inherit;
}

.leaflet-control-attribution {
    background: rgba(15, 23, 42, 0.7) !important;
    color: var(--text-muted) !important;
    font-size: 10px;
}

.leaflet-control-attribution a {
    color: var(--accent) !important;
}

/* 探索偏好输入 */
.pref-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.pref-input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
}
.pref-input::placeholder { color: var(--text-muted); }
.pref-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18);
}

/* 偏航推荐视图(全屏，非弹窗) */
.view-routes {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.routes-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--card-border);
}
.routes-title { font-size: 20px; font-weight: 700; color: var(--accent); }
.routes-close {
    background: var(--card);
    border: 1px solid var(--card-border);
    color: var(--text);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 10px;
    font-family: inherit;
}
.routes-close:hover { background: var(--card-active); border-color: var(--accent); }
.routes-body { display: flex; flex-direction: column; gap: 18px; }
.routes-loading {
    text-align: center;
    color: var(--text-muted);
    font-size: 15px;
    padding: 40px 0;
}
.ai-block { display: flex; flex-direction: column; gap: 8px; }
.ai-block-title { font-size: 13px; color: var(--text-muted); font-weight: 600; letter-spacing: 0.04em; }
.ai-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ai-tag {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
}
.ai-text { margin: 0; font-size: 14px; line-height: 1.6; color: var(--text); }
.ai-place {
    padding: 12px;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.ai-place-name { font-size: 15px; font-weight: 600; color: var(--text); }
.ai-place-type { font-size: 12px; color: var(--text-muted); font-weight: 400; }
.ai-foot { font-size: 12px; color: var(--text-muted); text-align: center; padding-top: 4px; }

/* 两屏视图切换 */
.view[hidden] { display: none; }

/* 探索屏：偏好输入 + 重新偏航按钮并排 */
.pref-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
}
.pref-row .pref-input { flex: 1; min-width: 0; }

.regen-btn {
    flex: none;
    padding: 12px 18px;
    background: var(--accent);
    color: #0f172a;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
}
.regen-btn:hover { filter: brightness(1.08); }
.regen-btn:active { transform: translateY(1px); }

/* 开始屏：时间与按钮间距，避免视觉重合 */
.view-start .time-picker { margin-bottom: 32px; }

/* 候选路线卡片 */
.route-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.route-head { display: flex; justify-content: space-between; align-items: center; }
.route-num { font-size: 14px; font-weight: 700; color: var(--accent); }
.route-meta { font-size: 12px; color: var(--text-muted); }
.route-reason { margin: 0; font-size: 14px; line-height: 1.55; color: var(--text); }
.route-path { font-size: 13px; color: var(--text); line-height: 1.6; }
.route-arrow { color: var(--accent); margin: 0 4px; font-weight: 700; }
.route-select {
    align-self: flex-start;
    padding: 8px 16px;
    background: var(--accent);
    color: #0f172a;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
}
.route-select:hover { filter: brightness(1.08); }

/* 导航界面浮层 */
.nav-bar {
    position: absolute;
    top: 12px; left: 12px; right: 12px;
    z-index: 500;
    background: rgba(2, 6, 23, 0.85);
    backdrop-filter: blur(6px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}
.nav-bar[hidden] { display: none; }
.nav-info { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.nav-title { font-size: 13px; font-weight: 700; color: var(--accent); }
.nav-route { font-size: 12px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-meta { font-size: 12px; color: var(--text-muted); }
.nav-end {
    padding: 8px 14px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
}
.nav-end:hover { background: rgba(255, 255, 255, 0.06); }

/* 导航模式：选中路线后全屏沉浸式导航界面 */
body.nav-mode {
    padding: 0;
    align-items: stretch;
    justify-content: stretch;
}
body.nav-mode .container {
    max-width: none;
    height: 100vh;
    gap: 0;
    padding: 0;
}
body.nav-mode .hero,
body.nav-mode .hint,
body.nav-mode .map-tip {
    display: none;
}
body.nav-mode .view-explore {
    height: 100vh;
    gap: 0;
}
body.nav-mode .pref-section { display: none; }
body.nav-mode .map-section {
    height: 100vh;
    margin-top: 0;
}
body.nav-mode .map {
    height: 100%;
    border-radius: 0;
    border: none;
}

/* 偏好设置视图(全屏，非弹窗) */
.view-pref {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.pref-block { display: flex; flex-direction: column; gap: 10px; }
.pref-block-title { font-size: 14px; color: var(--text-muted); font-weight: 600; letter-spacing: 0.04em; }
.pref-modes { display: flex; flex-wrap: wrap; gap: 8px; }
.pref-mode {
    padding: 10px 16px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
}
.pref-mode:hover { border-color: rgba(255,255,255,0.25); }
.pref-mode.active {
    background: var(--card-active);
    border-color: var(--card-active-border);
    color: var(--accent);
    font-weight: 600;
}
.pref-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.pref-tag {
    padding: 8px 14px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
}
.pref-tag:hover { border-color: rgba(255,255,255,0.25); }
.pref-tag.active {
    background: var(--card-active);
    border-color: var(--card-active-border);
    color: var(--accent);
    font-weight: 600;
}
.pref-tag-other.active {
    background: var(--card-active);
    border-color: var(--card-active-border);
    color: var(--accent);
}
.pref-other-input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}
.pref-other-input::placeholder { color: var(--text-muted); }
.pref-other-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18);
}
.pref-confirm-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: #1f2937;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.2s ease, filter 0.2s ease;
    font-family: inherit;
}
.pref-confirm-btn:hover:not(:disabled) { filter: brightness(1.05); transform: translateY(-1px); }
.pref-confirm-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* 偏好触发按钮 */
.pref-open-btn {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: #1f2937;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.15s ease, filter 0.2s ease;
}
.pref-open-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }

/* 导航：起点脉冲标记 */
.start-marker { background: transparent; border: none; }
.start-dot {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 20px; height: 20px;
    background: #1d6ef9;
    border: 4px solid #fff;
    border-radius: 50%;
    box-shadow: 0 2px 10px rgba(0,0,0,0.55);
    z-index: 2;
}
.start-pulse {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 20px; height: 20px;
    background: #1d6ef9;
    border-radius: 50%;
    opacity: 0.5;
    animation: startPulse 1.8s ease-out infinite;
    z-index: 1;
}
@keyframes startPulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(3.2); opacity: 0; }
}
/* 途经点数字圆点 */
.wp-marker { background: transparent; border: none; }
.wp-circle {
    width: 26px; height: 26px;
    border-radius: 50%;
    border: 3px solid #fff;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.45);
}
/* 终点标记 */
.end-dot {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 22px; height: 22px;
    background: #ef4444;
    border: 4px solid #fff;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.55);
}

/* 导航：路线方向箭头（带状chevron，更大更亮） */
.route-arrow { background: transparent; border: none; }
.route-arrow-icon {
    width: 18px; height: 18px;
    border-top: 6px solid #ffffff;
    border-right: 6px solid #ffffff;
    filter: drop-shadow(0 0 4px rgba(29, 110, 249, 0.95)) drop-shadow(0 1px 2px rgba(0,0,0,0.6));
    box-sizing: border-box;
}

/* 目的地问询屏 */
.view-dest {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}
.dest-question {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    letter-spacing: 0.04em;
}
.dest-options {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
}
.dest-btn {
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: #1f2937;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.15s ease, filter 0.2s ease;
}
.dest-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.dest-btn:nth-child(2) {
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--card-border);
}

/* 起点终点输入栏 */
.route-input-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
}
.route-input {
    flex: 1;
    box-sizing: border-box;
    padding: 12px 14px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}
.route-input::placeholder { color: var(--text-muted); }
.route-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18);
}
.loc-btn {
    flex-shrink: 0;
    width: 46px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--accent);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}
.loc-btn:hover { background: var(--card-active); border-color: var(--accent); }
.loc-btn.active { background: var(--card-active); border-color: var(--accent); }
.loc-btn.picking { background: var(--accent); color: #0f172a; border-color: var(--accent); animation: pickPulse 1.2s ease-in-out infinite; }
@keyframes pickPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* 起点/终点：地图选点长按钮 */
.route-pick-btn {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
    text-align: center;
}
.route-pick-btn:hover { border-color: rgba(255,255,255,0.3); background: var(--card-active); }
.route-pick-btn.picking {
    background: var(--accent);
    color: #0f172a;
    border-color: var(--accent);
    animation: pickPulse 1.2s ease-in-out infinite;
}
.pick-coord {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}
.pick-coord.done { color: var(--accent); }

/* 地图选点提示条（覆盖在地图上方） */
.pick-tip {
    position: absolute;
    top: 12px; left: 12px; right: 12px;
    z-index: 450;
    background: rgba(245, 158, 11, 0.95);
    color: #0f172a;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    padding: 10px 14px;
    border-radius: 12px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}
.pick-tip[hidden] { display: none; }