/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #0f0a04;
    font-family: 'Noto Serif SC', serif;
    color: #f5e6c8;
    font-size: 3.8vw;
    -webkit-font-smoothing: antialiased
}

body.day-mode {
    background: #f5e6c8;
    color: #2a1f10
}

/* ===== CSS变量 ===== */
:root {
    --bg: #1a1108;
    --bg-deep: #0f0a04;
    --fg: #f5e6c8;
    --muted: #a89070;
    --accent: #d4a853;
    --accent-glow: #d4a85355;
    --ochre: #c45c3a;
    --card: #2a1f10;
    --border: #3d2e1a;
    --day-bg: #f5e6c8;
    --day-fg: #2a1f10;
    --day-card: #fff8ef;
    --day-border: #d4a853;
    --day-muted: #8a5a1e
}

/* ===== 加载动画 ===== */
.loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 10, 4, 0.95);
    transition: opacity 0.8s, visibility 0.8s
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none
}

.loading-inner {
    text-align: center
}

.loading-spinner {
    width: 18vw;
    height: 18vw;
    border-radius: 50%;
    border: 1vw solid rgba(212, 168, 83, 0.15);
    border-top-color: #d4a853;
    animation: spin 1s linear infinite;
    margin: 0 auto 4vw
}

@keyframes spin {
    to {
        transform: rotate(360deg)
    }
}

.loading-ornament {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3vw;
    margin-bottom: 3vw
}

.loading-ornament span:first-child,
.loading-ornament span:last-child {
    width: 12vw;
    height: 1px;
    background: linear-gradient(90deg, transparent, #d4a853, transparent)
}

.loading-ornament .diamond {
    width: 2.5vw;
    height: 2.5vw;
    background: #d4a853;
    transform: rotate(45deg);
    animation: diamond-spin 4s linear infinite
}

@keyframes diamond-spin {
    to {
        transform: rotate(405deg)
    }
}

.loading-text {
    font-size: 5vw;
    color: #d4a853;
    letter-spacing: 0.3em;
    font-weight: 700
}

.loading-sub {
    font-size: 3vw;
    color: #6d4518;
    letter-spacing: 0.5em;
    margin-top: 2vw;
    font-family: 'Cinzel', serif
}

/* ===== 粒子画布 ===== */
#particle-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none
}

/* ===== 触摸光晕 ===== */
#cursor-glow {
    position: fixed;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.06) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s
}

body.day-mode #cursor-glow {
    background: radial-gradient(circle, rgba(196, 92, 58, 0.04) 0%, transparent 70%)
}

#cursor-glow.active {
    opacity: 1
}

/* ===== 进度条 ===== */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--ochre), var(--accent), var(--ochre));
    z-index: 9998;
    width: 0;
    transition: width 0.1s;
    box-shadow: 0 0 8px var(--accent-glow)
}

/* ===== 全局控件 ===== */
#ctrl-panel {
    position: fixed;
    left: 3vw;
    top: 3vw;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 2vw
}

.ctrl-btn {
    width: 10vw;
    height: 10vw;
    border-radius: 2.5vw;
    border: 1px solid var(--border);
    background: rgba(42, 31, 16, 0.85);
    color: var(--muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    -webkit-tap-highlight-color: transparent;
    transition: all 0.3s
}

body.day-mode .ctrl-btn {
    background: rgba(255, 248, 239, 0.9);
    border-color: var(--day-border);
    color: var(--day-muted)
}

.ctrl-btn:active,
.ctrl-btn.active {
    border-color: var(--accent);
    color: var(--accent)
}

.ctrl-icon {
    font-size: 4.5vw
}

.ctrl-tip {
    position: absolute;
    left: 12vw;
    white-space: nowrap;
    background: var(--card);
    border: 1px solid var(--border);
    padding: 1.5vw 3vw;
    border-radius: 2vw;
    font-size: 3vw;
    color: var(--fg);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s
}

.ctrl-btn:active .ctrl-tip {
    opacity: 1
}

/* ===== 页面指示器 ===== */
#page-indicator {
    position: fixed;
    left: 2.5vw;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 1.5vw
}

.pg-dot {
    width: 2vw;
    height: 2vw;
    border-radius: 50%;
    background: rgba(212, 168, 83, 0.25);
    transition: all 0.3s
}

.pg-dot.active {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    transform: scale(1.5)
}

/* ===== 翻页提示 ===== */
#swipe-hint {
    position: fixed;
    bottom: 4vw;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1vw;
    opacity: 0.6;
    transition: opacity 0.4s;
    pointer-events: none
}

#swipe-hint span {
    font-size: 3vw;
    color: var(--muted);
    letter-spacing: 0.15em
}

#swipe-hint .arrow {
    animation: arrow-bounce 1.5s ease-in-out infinite;
    font-size: 4vw;
    color: var(--accent)
}

@keyframes arrow-bounce {

    0%,
    100% {
        transform: translateY(0)
    }

    50% {
        transform: translateY(-1.5vw)
    }
}

/* ===== 搜索 ===== */
#search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 10, 4, 0.9);
    backdrop-filter: blur(10px);
    z-index: 200;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s
}

#search-overlay.active {
    opacity: 1;
    pointer-events: auto
}

body.day-mode #search-overlay {
    background: rgba(245, 230, 200, 0.9)
}

#search-box {
    width: 90%;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4vw;
    padding: 4vw;
    transform: translateY(-20px);
    transition: transform 0.3s
}

body.day-mode #search-box {
    background: var(--day-card);
    border-color: var(--day-border)
}

#search-overlay.active #search-box {
    transform: translateY(0)
}

.search-header {
    display: flex;
    align-items: center;
    gap: 3vw;
    border-bottom: 1px solid var(--border);
    padding-bottom: 3vw
}

.search-icon {
    font-size: 5vw
}

#search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--fg);
    font-size: 4vw;
    font-family: 'Noto Serif SC', serif
}

body.day-mode #search-input {
    color: var(--day-fg)
}

#search-input::placeholder {
    color: var(--muted)
}

.search-close {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 1.5vw 3vw;
    border-radius: 2vw;
    font-size: 3vw;
    cursor: pointer
}

#search-results {
    max-height: 50vh;
    overflow-y: auto;
    margin-top: 3vw
}

.search-item {
    padding: 3vw;
    border-radius: 2vw;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 3.8vw
}

.search-item:active {
    background: rgba(212, 168, 83, 0.15)
}

/* ===== 收藏面板 ===== */
#bookmark-panel {
    position: fixed;
    right: -80vw;
    top: 0;
    bottom: 0;
    width: 80vw;
    background: var(--card);
    border-left: 1px solid var(--border);
    z-index: 150;
    transition: right 0.4s;
    padding: 5vw;
    overflow-y: auto
}

body.day-mode #bookmark-panel {
    background: var(--day-card);
    border-color: var(--day-border)
}

#bookmark-panel.open {
    right: 0
}

.bm-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 5vw
}

.bm-header h3 {
    font-size: 4.5vw;
    color: var(--fg)
}

.bm-close {
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 5vw;
    cursor: pointer
}

.bm-empty {
    text-align: center;
    color: var(--muted);
    padding: 10vw 0;
    font-size: 3.8vw
}

.bm-item {
    padding: 3vw;
    border: 1px solid var(--border);
    border-radius: 3vw;
    margin-bottom: 2vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 3.8vw;
    color: var(--accent)
}

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto
}

.modal-content {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4vw;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    padding: 6vw;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1)
}

body.day-mode .modal-content {
    background: var(--day-card);
    border-color: var(--day-border)
}

.modal-overlay.active .modal-content {
    transform: scale(1)
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4vw
}

.modal-header h3 {
    font-size: 4.5vw;
    color: var(--fg)
}

.modal-close {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 1.5vw 3vw;
    border-radius: 2vw;
    font-size: 4vw;
    cursor: pointer
}

#modal-body {
    font-size: 3.5vw;
    line-height: 1.8;
    color: var(--muted)
}

#modal-body img {
    width: 100%;
    border-radius: 3vw;
    margin-bottom: 3vw;
    border: 1px solid var(--border)
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 15vw;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 3vw 6vw;
    background: var(--card);
    border: 1px solid var(--accent);
    border-radius: 3vw;
    font-size: 3.5vw;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s;
    pointer-events: none;
    white-space: nowrap
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0)
}

/* ===== 20页全屏容器 ===== */
#page-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden
}

.page {
    position: absolute;
    inset: 0;
    overflow: hidden;
    transform: translateY(100vh);
    transition: transform 0.35s ease-in-out;
    will-change: transform
}

.page.active {
    transform: translateY(0)
}

.page.above {
    transform: translateY(-100vh)
}

/* ===== 各页背景图 ===== */
/* 第1页背景图修改处 */
.page1 .page-bg {
    background: radial-gradient(ellipse at 50% 40%, rgba(212, 168, 83, 0.1) 0%, transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(196, 92, 58, 0.06) 0%, transparent 50%), linear-gradient(180deg, #0f0a04, #1a1108 40%, #1f1509);
    background-size: cover;
    background-position: center
}

/* 第2页背景图修改处 */
.page2 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第3页背景图修改处 */
.page3 .page-bg {
    background: #0f0a04;
    background-size: cover;
    background-position: center
}

/* 第4页背景图修改处 */
.page4 .page-bg {
    background: #1a1108;
    background-size: cover;
    background-position: center
}

/* 第5页背景图修改处 */
.page5 .page-bg {
    background: radial-gradient(ellipse at 50% 60%, rgba(196, 92, 58, 0.06) 0%, transparent 60%), #0f0a04;
    background-size: cover;
    background-position: center
}

/* 第6页背景图修改处 */
.page6 .page-bg {
    background: #1a1108;
    background-size: cover;
    background-position: center
}

/* 第7页背景图修改处 */
.page7 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第8页背景图修改处 */
.page8 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第9页背景图修改处 */
.page9 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第10页背景图修改处 */
.page10 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第11页背景图修改处 */
.page11 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第12页背景图修改处 */
.page12 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第13页背景图修改处 */
.page13 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第14页背景图修改处 */
.page14 .page-bg {
    background: linear-gradient(180deg, #1a1108, #0f0a04);
    background-size: cover;
    background-position: center
}

/* 第15页背景图修改处 */
.page15 .page-bg {
    background: #1a1108;
    background-size: cover;
    background-position: center
}

/* 第16页背景图修改处 */
.page16 .page-bg {
    background: #0f0a04;
    background-size: cover;
    background-position: center
}

/* 第17页背景图修改处 */
.page17 .page-bg {
    background: #1a1108;
    background-size: cover;
    background-position: center
}

/* 第18页背景图修改处 */
.page18 .page-bg {
    background: #0f0a04;
    background-size: cover;
    background-position: center
}

/* 第19页背景图修改处 */
.page19 .page-bg {
    background: #1a1108;
    background-size: cover;
    background-position: center
}

/* 第20页背景图修改处 */
.page20 .page-bg {
    background: #0f0a04;
    background-size: cover;
    background-position: center
}

.page-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden
}

.page-bg-img {
    position: absolute;
    width: 100%;
    max-height: 100vh;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    aspect-ratio: 16 / 9;
    object-fit: cover;
    opacity: 0.35;
    pointer-events: none
}

/* 竖屏设备：图片填满高度，宽度自适应 */
@media (max-aspect-ratio: 9/16) {
    .page-bg-img {
        width: auto;
        height: 100%;
        max-width: 100vw;
        max-height: unset;
        left: 50%;
        top: 0;
        transform: translateX(-50%)
    }
}

body.day-mode .page-bg {
    filter: brightness(1.5) saturate(0.8)
}

/* ===== 第2页日夜切换 ===== */
.page2 .night-img,
.page2 .morning-img {
    transition: opacity 0.6s ease
}

/* 默认夜间：夜晚图显示，白天图隐藏 */
.page2 .night-img {
    opacity: 0.35
}
.page2 .morning-img {
    opacity: 0
}

/* 切换为白天 */
.page2.daytime .night-img {
    opacity: 0
}
.page2.daytime .morning-img {
    opacity: 0.35
}

/* 日夜切换滑块 */
.daynight-toggle {
    display: flex;
    align-items: center;
    gap: 3vw;
    margin-bottom: 5vw;
    -webkit-tap-highlight-color: transparent
}

.dn-icon {
    font-size: 5vw;
    transition: transform 0.3s
}

.dn-track {
    width: 16vw;
    height: 8vw;
    border-radius: 4vw;
    background: linear-gradient(90deg, #1a2a4a, #4a9ead);
    border: 1px solid var(--border);
    position: relative;
    cursor: pointer;
    transition: all 0.4s
}

.dn-thumb {
    position: absolute;
    top: 1vw;
    left: 1vw;
    width: 6vw;
    height: 6vw;
    border-radius: 50%;
    background: linear-gradient(135deg, #d4a853, #f5e6c8);
    box-shadow: 0 0 6px var(--accent-glow);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1)
}

.daytime .dn-thumb {
    transform: translateX(8vw)
}

.daytime .dn-track {
    background: linear-gradient(90deg, #4a9ead, #f5e6c8);
    border-color: var(--day-border)
}

/* ===== 通用页面内容 ===== */
.page-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 12vw 5vw;
    text-align: center
}

.section-tag {
    font-family: 'Cinzel', serif;
    font-size: 3vw;
    color: var(--ochre);
    letter-spacing: 0.2em;
    margin-bottom: 2vw
}

body.day-mode .section-tag {
    color: var(--day-muted)
}

.section-title {
    font-size: 6vw;
    font-weight: 700;
    margin-bottom: 4vw;
    text-shadow: 0 0 8vw rgba(212, 168, 83, 0.2)
}

/* ===== 装饰线 ===== */
.ornament-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3vw;
    margin: 0 auto;
    width: fit-content
}

.ornament-divider span:first-child,
.ornament-divider span:last-child {
    width: 10vw;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent)
}

.ornament-divider .diamond {
    width: 2vw;
    height: 2vw;
    background: var(--accent);
    transform: rotate(45deg)
}

/* ===== 第1页Hero ===== */
.hero-stars {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden
}

.star {
    position: absolute;
    width: 1.5px;
    height: 1.5px;
    background: var(--accent);
    border-radius: 50%;
    animation: twinkle var(--dur) ease-in-out infinite
}

@keyframes twinkle {

    0%,
    100% {
        opacity: 0.15
    }

    50% {
        opacity: 1
    }
}

.hero-content {
    z-index: 3
}

.hero-tagline {
    text-align: center;
    margin-bottom: 4vw;
    opacity: 0;
    transition: opacity 1.5s ease
}

.hero-tagline.visible {
    opacity: 1
}

.hero-tagline-main {
    font-family: 'Noto Serif SC', serif;
    font-size: 10vw;
    font-weight: 900;
    color: #f5e6c8;
    text-shadow: 0 0 20px rgba(212, 168, 83, 0.4);
    margin-bottom: 1.5vw;
    letter-spacing: 0.1em
}

.hero-tagline-sub {
    font-size: 3.8vw;
    color: var(--muted);
    letter-spacing: 0.15em
}

.hero-title {
    font-family: 'Cinzel', serif;
    font-size: 13vw;
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(135deg, #f5e6c8, #d4a853 40%, #e8c98a 60%, #c45c3a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 3vw
}

.hero-subtitle {
    font-size: 4.5vw;
    color: var(--muted);
    letter-spacing: 0.25em;
    min-height: 6vw;
    margin-bottom: 4vw
}

.typewriter-cursor {
    display: inline-block;
    width: 1px;
    height: 4.5vw;
    background: var(--accent);
    margin-left: 1px;
    animation: cursor-blink 1s step-end infinite;
    vertical-align: text-bottom
}

@keyframes cursor-blink {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: 0
    }
}

.hero-desc {
    font-size: 3.5vw;
    color: rgba(168, 144, 112, 0.75);
    line-height: 1.8;
    max-width: 85vw
}

.hero-char {
    display: inline-block;
    opacity: 0;
    animation: hero-char-in 0.5s ease forwards
}

@keyframes hero-char-in {
    from {
        opacity: 0;
        transform: translateY(3vw)
    }

    to {
        opacity: 1;
        transform: translateY(0)
    }
}

/* ===== 第2页统计 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5vw;
    width: 85vw
}

.stat-item {
    text-align: center
}

.stat-ring {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28vw;
    height: 28vw
}

.stat-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg)
}

.stat-ring circle {
    fill: none;
    stroke-linecap: round
}

.ring-bg {
    stroke: rgba(212, 168, 83, 0.1);
    stroke-width: 4
}

.ring-fill {
    stroke: var(--accent);
    stroke-width: 4;
    stroke-dasharray: 251;
    stroke-dashoffset: 251;
    transition: stroke-dashoffset 2s ease-out
}

.stat-num {
    position: absolute;
    font-family: 'Cinzel', serif;
    font-size: 5vw;
    font-weight: 900;
    color: var(--accent)
}

.stat-label {
    font-size: 3.2vw;
    color: var(--muted);
    margin-top: 2vw
}

/* ===== 第3页路线图 ===== */
.route-content {
    justify-content: flex-start;
    padding-top: 8vw
}

.map-toggle {
    display: flex;
    gap: 1.5vw;
    margin-bottom: 3vw
}

.map-toggle-btn {
    padding: 2vw 4vw;
    border-radius: 2vw;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    font-size: 3.2vw;
    font-family: 'Noto Serif SC', serif;
    cursor: pointer;
    transition: all 0.3s
}

.map-toggle-btn.active {
    background: rgba(212, 168, 83, 0.15);
    color: var(--accent);
    border-color: var(--accent)
}

.route-map-wrap {
    position: relative;
    width: 90vw;
    aspect-ratio: 2/1
}

#route-canvas {
    width: 100%;
    height: 100%;
    border-radius: 3vw
}

.city-tooltip {
    position: absolute;
    padding: 2vw 3vw;
    background: rgba(42, 31, 16, 0.95);
    border: 1px solid var(--accent);
    border-radius: 2vw;
    font-size: 3vw;
    opacity: 0;
    transform: translateY(1vw);
    transition: all 0.2s;
    pointer-events: none;
    white-space: nowrap;
    z-index: 10
}

.city-tooltip.visible {
    opacity: 1;
    transform: translateY(0)
}

/* ===== 第4页：时间线分栏（合并） ===== */
.timeline-split-content {
    justify-content: flex-start;
    padding-top: 4vw;
    overflow-y: auto;
}

.timeline-split {
    display: flex;
    position: relative;
    width: 88vw;
    gap: 0;
    padding: 2vw 0 4vw;
}

.tl-center-line {
    position: absolute;
    left: 50%;
    top: 3vw;
    bottom: 3vw;
    width: 1px;
    background: var(--accent);
    transform: translateX(-50%);
    animation: lineRise 1.2s ease-out forwards;
}

@keyframes lineRise {
    from {
        clip-path: inset(100% 0 0 0);
        opacity: 0;
    }
    to {
        clip-path: inset(0 0 0 0);
        opacity: 1;
    }
}

.tl-left, .tl-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2.5vw;
}

.tl-left {
    padding-right: 4vw;
}

.tl-right {
    padding-left: 4vw;
}

.tl-drop-item {
    position: relative;
}

.tl-drop-item .tl-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 3vw;
    padding: 3vw 3.5vw;
    cursor: pointer;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

body.day-mode .tl-drop-item .tl-card {
    background: var(--day-card);
    border-color: var(--day-border)
}

.tl-drop-item .tl-card:active {
    border-color: var(--accent)
}

.tl-drop-item .tl-card.dropped {
    transform: translateY(120%) scale(0.85);
    opacity: 0;
    pointer-events: none;
}

.tl-year {
    font-family: 'Cinzel', serif;
    color: var(--accent);
    font-size: 3vw;
    font-weight: 700
}

.tl-drop-item .tl-card h3 {
    font-size: 3.5vw;
    margin: 1vw 0;
    color: var(--fg)
}

.tl-drop-item .tl-card p {
    font-size: 2.8vw;
    color: var(--muted);
    line-height: 1.5
}

.tl-hint {
    font-size: 2.5vw;
    color: var(--accent);
    margin-top: 1.5vw;
    opacity: 0.6
}

.tl-card.dropped + .tl-reveal {
    opacity: 1;
}

.tl-reveal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: transparent;
    border: 1px solid var(--accent);
    border-radius: 3vw;
    padding: 3vw 3.5vw;
    font-size: 2.8vw;
    color: var(--fg);
    line-height: 1.7;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.5s, max-height 0.5s;
    pointer-events: none;
}

/* ===== 名言 ===== */
.quote-section {
    margin-top: 6vw;
    text-align: center;
    width: 85vw
}

.quote-mark {
    font-family: 'Cinzel', serif;
    font-size: 15vw;
    color: rgba(212, 168, 83, 0.06);
    line-height: 1;
    position: absolute;
    top: -5vw;
    left: -3vw
}

.quote-text {
    font-size: 4.5vw;
    font-weight: 600;
    line-height: 1.6;
    min-height: 10vw;
    color: var(--fg)
}

.quote-attr {
    font-size: 3vw;
    color: var(--muted);
    margin-top: 3vw;
    letter-spacing: 0.15em
}

/* ===== 第6/15页翻转卡片 ===== */
.culture-content {
    justify-content: flex-start;
    padding-top: 8vw
}

.flip-grid {
    display: flex;
    flex-direction: column;
    gap: 3vw;
    width: 85vw
}

.flip-card {
    perspective: 1000px;
    height: 42vw;
    cursor: pointer
}

.flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d
}

.flip-card.flipped .flip-inner {
    transform: rotateY(180deg)
}

.flip-front,
.flip-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: 3vw;
    overflow: hidden;
    border: 1px solid var(--border)
}

body.day-mode .flip-front,
body.day-mode .flip-back {
    border-color: var(--day-border)
}

.flip-back {
    transform: rotateY(180deg);
    background: var(--card);
    padding: 4vw;
    display: flex;
    flex-direction: column;
    justify-content: center
}

body.day-mode .flip-back {
    background: var(--day-card)
}

.flip-front {
    background: var(--card)
}

body.day-mode .flip-front {
    background: var(--day-card)
}

.flip-img {
    width: 100%;
    height: 55%;
    object-fit: cover
}

.flip-body {
    padding: 3vw
}

.culture-tag {
    display: inline-block;
    padding: 1vw 2.5vw;
    background: rgba(212, 168, 83, 0.12);
    border: 1px solid rgba(212, 168, 83, 0.2);
    border-radius: 4vw;
    font-size: 2.8vw;
    color: var(--accent);
    margin-bottom: 1.5vw
}

.flip-body h3 {
    font-size: 4vw;
    color: var(--fg);
    margin-bottom: 1vw
}

.flip-body p {
    font-size: 3vw;
    color: var(--muted)
}

.flip-back h3 {
    font-size: 4vw;
    color: var(--accent);
    margin-bottom: 2vw
}

.flip-back p {
    font-size: 3vw;
    color: var(--muted);
    line-height: 1.7
}

/* ===== 答题页 ===== */
.quiz-page .page-content {
    pointer-events: auto
}

.quiz-page .section-tag {
    color: #4a9ead;
    font-size: 4vw
}

.quiz-q {
    font-size: 4.5vw;
    line-height: 1.5;
    margin-bottom: 6vw;
    font-weight: 600
}

.quiz-opts {
    list-style: none;
    width: 85vw
}

.quiz-opts li {
    background: rgba(42, 31, 16, 0.8);
    border: 1px solid rgba(212, 168, 83, 0.3);
    border-radius: 3vw;
    padding: 3.5vw 4vw;
    margin-bottom: 3vw;
    font-size: 4vw;
    color: var(--fg);
    cursor: pointer;
    transition: all 0.2s
}

body.day-mode .quiz-opts li {
    background: rgba(255, 248, 239, 0.9);
    border-color: var(--day-border);
    color: var(--day-fg)
}

.quiz-opts li:active {
    background: rgba(212, 168, 83, 0.15);
    border-color: var(--accent)
}

.quiz-opts li.correct {
    border-color: #4ade80;
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80
}

.quiz-opts li.wrong {
    border-color: #f87171;
    background: rgba(248, 113, 113, 0.15);
    color: #f87171;
    animation: shake 0.4s
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0)
    }

    25% {
        transform: translateX(-2vw)
    }

    75% {
        transform: translateX(2vw)
    }
}

.quiz-fb {
    font-size: 3.5vw;
    margin-top: 3vw;
    color: #4a9ead;
    min-height: 5vw
}

/* ===== 第16页城市卡片 ===== */
.city-content {
    justify-content: flex-start;
    padding-top: 8vw
}

.city-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3vw;
    width: 85vw
}

.city-card {
    position: relative;
    border-radius: 3vw;
    overflow: hidden;
    height: 55vw;
    cursor: pointer
}

.city-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s
}

.city-card:active .city-img {
    transform: scale(1.05)
}

.city-bm {
    position: absolute;
    top: 2vw;
    right: 2vw;
    z-index: 5;
    width: 8vw;
    height: 8vw;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.5);
    font-size: 4vw;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    -webkit-tap-highlight-color: transparent
}

.city-bm.bookmarked {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(212, 168, 83, 0.2)
}

/* ===== 第17页对比 ===== */
.compare-content {
    justify-content: flex-start;
    padding-top: 6vw
}

.compare-box {
    position: relative;
    width: 85vw;
    aspect-ratio: 16/9;
    border-radius: 3vw;
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 4vw
}

.compare-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover
}

.compare-overlay {
    display: none
}

.compare-top {
    clip-path: inset(0 0 0 0);
    z-index: 3
}

.compare-slider {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent);
    cursor: ew-resize;
    z-index: 5;
    box-shadow: 0 0 8px var(--accent-glow)
}

.compare-slider::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8vw;
    height: 8vw;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg)
}

.compare-label {
    position: absolute;
    bottom: 3vw;
    padding: 1vw 3vw;
    border-radius: 1.5vw;
    font-size: 2.8vw;
    z-index: 6;
    background: rgba(42, 31, 16, 0.7);
    color: var(--fg)
}

.compare-label.left {
    left: 3vw
}

.compare-label.right {
    right: 3vw
}

.tab-bar {
    display: flex;
    gap: 2vw;
    margin-bottom: 2vw
}

.tab-btn {
    padding: 2vw 4vw;
    border-radius: 2vw 2vw 0 0;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    font-size: 3.2vw;
    cursor: pointer;
    font-family: 'Noto Serif SC', serif;
    transition: all 0.3s
}

.tab-btn.active {
    background: var(--card);
    color: var(--accent);
    border-bottom-color: var(--card)
}

body.day-mode .tab-btn.active {
    background: var(--day-card)
}

.tab-panel {
    display: none;
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 3vw 3vw;
    padding: 4vw;
    background: var(--card);
    font-size: 3.2vw;
    line-height: 1.7;
    color: var(--muted)
}

body.day-mode .tab-panel {
    background: var(--day-card);
    border-color: var(--day-border)
}

.tab-panel.active {
    display: block
}

/* ===== 第18页FAQ ===== */
.faq-content {
    justify-content: flex-start;
    padding-top: 8vw
}

.faq-list {
    width: 85vw
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: 3vw;
    overflow: hidden;
    margin-bottom: 2vw;
    transition: border-color 0.3s;
    background: var(--card)
}

body.day-mode .faq-item {
    background: var(--day-card);
    border-color: var(--day-border)
}

.faq-item.open {
    border-color: var(--accent)
}

.faq-q {
    padding: 4vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 3.8vw;
    cursor: pointer;
    color: var(--fg)
}

.faq-arrow {
    font-size: 3vw;
    transition: transform 0.3s;
    color: var(--accent)
}

.faq-item.open .faq-arrow {
    transform: rotate(180deg)
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s;
    padding: 0 4vw
}

.faq-item.open .faq-a {
    max-height: 40vw;
    padding: 0 4vw 4vw
}

.faq-a p {
    font-size: 3.2vw;
    color: var(--muted);
    line-height: 1.7
}

/* ===== 第19页画布 ===== */
.draw-content {
    justify-content: flex-start;
    padding-top: 6vw
}

.draw-toolbar {
    width: 85vw;
    margin-bottom: 3vw
}

.color-bar {
    display: flex;
    gap: 2.5vw;
    margin-bottom: 2.5vw
}

.color-btn {
    width: 7vw;
    height: 7vw;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s
}

.color-btn.active {
    border-color: var(--fg);
    transform: scale(1.15)
}

.draw-actions {
    display: flex;
    align-items: center;
    gap: 3vw;
    flex-wrap: wrap
}

.size-label {
    font-size: 3vw;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 2vw
}

.size-label input {
    width: 20vw;
    accent-color: var(--accent)
}

.draw-btn {
    padding: 2vw 4vw;
    border-radius: 2vw;
    background: rgba(212, 168, 83, 0.15);
    border: 1px solid rgba(212, 168, 83, 0.3);
    color: var(--accent);
    font-size: 3vw;
    cursor: pointer;
    font-family: 'Noto Serif SC', serif
}

#draw-canvas {
    width: 85vw;
    height: 80vw;
    border-radius: 3vw;
    border: 1px solid var(--border);
    touch-action: none;
    background: var(--card)
}

body.day-mode #draw-canvas {
    background: var(--day-card);
    border-color: var(--day-border)
}

/* ===== 第20页刮刮乐 ===== */
#scratch-bottom {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
    background: linear-gradient(135deg, #0f0a04, #2a1f10);
    text-align: center
}

#scratch-bottom p {
    font-family: 'Cinzel', serif;
    font-size: 7vw;
    color: var(--accent);
    margin-bottom: 3vw;
    text-shadow: 0 0 10px var(--accent-glow)
}

#scratch-bottom span {
    font-size: 4vw;
    color: var(--muted);
    letter-spacing: 0.5em
}

.page20 {
    overflow: hidden
}

#scratch-canvas {
    position: fixed;
    inset: 0;
    z-index: 3;
    touch-action: none
}

.scratch-tip {
    position: absolute;
    bottom: 8vw;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 4;
    font-size: 3.5vw;
    color: var(--accent);
    pointer-events: none;
    transition: opacity 0.3s
}

.scratch-tip.hidden {
    opacity: 0
}