/* ==================== 本地字体声明 ==================== */
@font-face {
    font-family: 'HYPixel9pxU';
    src: url('字体/HYPixel9pxU-2.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'MaoZeDong';
    src: url('字体/maozedong-1.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'ZiYuQuWeiXiangSu';
    src: url('字体/ZiYuQuWeiXiangSu-2.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: #f7f7f7;
    --text-primary: #1d1d1f;
    --text-secondary: #606060;
    --accent: #c9a96e;
    --border: #e7e7e7;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Serif SC', serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
}

.content-protected body,
.content-protected img,
.content-protected video,
.content-protected canvas,
.content-protected .page-container {
    -webkit-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
}

.content-protected a,
.content-protected button {
    -webkit-user-select: none;
    user-select: none;
}

.content-protection-notice {
    position: fixed;
    left: 50%;
    bottom: 2rem;
    z-index: 20000;
    max-width: min(28rem, calc(100vw - 2rem));
    padding: 0.78rem 1rem;
    border: 1px solid rgba(29, 29, 31, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    color: rgba(29, 29, 31, 0.72);
    box-shadow: 0 16px 44px rgba(29, 29, 31, 0.12);
    font-family: 'Noto Serif SC', serif;
    font-size: 0.86rem;
    letter-spacing: 0.06em;
    line-height: 1.5;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 0.6rem);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.content-protection-notice.active {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* 视频背景 */
.bg-video {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: -2;
    pointer-events: none;
}

/* 视频遮罩层，确保内容可读性，鼠标处透明探照灯 */
.bg-video-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    z-index: -1;
    pointer-events: none;
    mask-image: radial-gradient(circle 250px at var(--spotlight-x, 50%) var(--spotlight-y, 50%), transparent 0%, transparent 30%, black 60%);
    -webkit-mask-image: radial-gradient(circle 250px at var(--spotlight-x, 50%) var(--spotlight-y, 50%), transparent 0%, transparent 30%, black 60%);
}

/* 页面内容容器 - 居中限宽 */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: transparent;
    z-index: 1000;
    transition: none;
}

.navbar.scrolled {
    background: transparent;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.2em;
    cursor: pointer;
    line-height: 1;
    white-space: nowrap;
}

.nav-logo {
    width: 2rem;
    height: 2rem;
    display: block;
    flex: 0 0 auto;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.35rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    transition: color 0.35s ease, transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    display: inline-block;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-links a:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-links a:hover::after {
    width: 100%;
    left: 0;
}

.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    width: 100%;
    left: 0;
}

/* 主视觉区 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    position: relative;
    padding: 8.2rem 3rem 4.2rem;
    background: #ffffff;
}

.hero-content {
    display: grid;
    grid-template-columns: minmax(260px, 0.95fr) minmax(220px, 330px) minmax(260px, 0.95fr);
    align-items: start;
    justify-content: center;
    gap: clamp(2.5rem, 6vw, 5.5rem);
    max-width: 1120px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title-panel {
    padding-top: 2.2rem;
    color: #191919;
}

.hero-kicker {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 1.25rem;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.02em;
    color: #171717;
}

.hero-kicker span:last-child {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: rgba(25, 25, 25, 0.72);
}

.hero-grid-title {
    display: grid;
    grid-template-columns: repeat(4, 3.25rem);
    width: max-content;
    margin: 0;
    border-top: 1px solid rgba(154, 83, 36, 0.72);
    border-left: 1px solid rgba(154, 83, 36, 0.72);
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0;
}

.hero-grid-title span,
.hero-sub-grid span {
    display: grid;
    place-items: center;
    border-right: 1px solid rgba(154, 83, 36, 0.72);
    border-bottom: 1px solid rgba(154, 83, 36, 0.72);
    background: rgba(255, 255, 255, 0.18);
}

.hero-grid-title span {
    width: 3.25rem;
    height: 2.9rem;
}

.hero-sub-grid {
    display: grid;
    grid-template-columns: repeat(7, 1.65rem);
    width: max-content;
    margin-top: 0.9rem;
    border-top: 1px solid rgba(154, 83, 36, 0.72);
    border-left: 1px solid rgba(154, 83, 36, 0.72);
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1;
    color: #222;
}

.hero-sub-grid span {
    width: 1.65rem;
    height: 1.45rem;
}

.hero-logo {
    position: relative;
    width: clamp(250px, 28vw, 360px);
    max-width: 100%;
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    justify-self: center;
    z-index: 2;
    pointer-events: none;
}

.hero-logo img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    filter: none;
}

.hero-side-panel {
    display: flex;
    flex-direction: row-reverse;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1.25rem;
    padding-top: 1.5rem;
    color: #191919;
}

.hero-side-years,
.hero-side-title,
.hero-side-copy {
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.hero-side-years {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    line-height: 1;
    color: rgba(25, 25, 25, 0.78);
}

.hero-side-title {
    margin: 0;
    font-size: clamp(2rem, 3.1vw, 3.1rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: 0.06em;
}

.hero-side-copy {
    max-height: 315px;
    margin: 0;
    color: rgba(25, 25, 25, 0.72);
    font-size: 0.9rem;
    line-height: 1.72;
    letter-spacing: 0.04em;
}

.hero-bottom-copy {
    width: min(100%, 620px);
    margin: clamp(2.5rem, 8vh, 5.5rem) auto 0;
    position: relative;
    z-index: 2;
    text-align: center;
    color: rgba(25, 25, 25, 0.74);
    font-size: 0.82rem;
    line-height: 2;
    letter-spacing: 0.06em;
}

.hero-bottom-copy p {
    margin: 0.18rem 0;
}

.hero-bottom-copy a {
    display: inline-block;
    margin-top: 1.35rem;
    color: rgba(154, 83, 36, 0.86);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
}

.hero-bottom-copy a::before {
    content: '◎';
    margin-right: 0.4rem;
    font-size: 0.8rem;
}

/* 竖排文字组 */
.vertical-text-group {
    display: flex;
    flex-direction: row-reverse;
    gap: 2rem;
}

.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    line-height: 1.3;
    display: inline-block;
    padding: 0.2rem 0.15rem;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: default;
}

.vertical-text:hover {
    letter-spacing: 0.55em;
    color: var(--text-primary);
    text-shadow: 0 0 25px rgba(245, 245, 245, 0.35), 0 0 50px rgba(245, 245, 245, 0.1);
    transform: scale(1.06);
}

.vertical-text.main-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.4em;
    padding: 0.5rem 0.5rem;
}

.vertical-text.main-title:hover {
    letter-spacing: 0.65em;
    text-shadow: 0 0 40px rgba(201, 169, 110, 0.5), 0 0 80px rgba(201, 169, 110, 0.2);
    transform: scale(1.06);
}

.vertical-text.sub-title {
    font-size: 2rem;
    color: var(--accent);
    letter-spacing: 0.3em;
    padding: 0.5rem 0.4rem;
}

.vertical-text.sub-title:hover {
    letter-spacing: 0.55em;
    color: #d4b87a;
    text-shadow: 0 0 25px rgba(201, 169, 110, 0.5);
    transform: scale(1.06);
}

/* 主视觉图片 */
.hero-image-container {
    position: relative;
    width: 450px;
    max-width: 100%;
    flex-shrink: 0;
    background: #f5f5f5;
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.5s ease, border-radius 0.5s ease;
}

.hero-image-container:hover {
    box-shadow:
        0 0 30px rgba(201, 169, 110, 0.25),
        0 0 60px rgba(201, 169, 110, 0.1),
        0 20px 50px rgba(0, 0, 0, 0.4);
    border-radius: 6px;
}

.hero-image-container img {
    width: 100%;
    display: block;
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.7s ease;
}

.hero-image-container:hover img {
    transform: scale(1.04);
    filter: brightness(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(26, 26, 26, 0.05),
        rgba(26, 26, 26, 0) 50%,
        rgba(26, 26, 26, 0.15)
    );
    pointer-events: none;
}

/* GIF 卡通云朵气泡 */
.gif-monitor {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 500;
    transform: scale(0.8);
    isolation: isolate;
    /* 云朵形状 */
    background: #fff;
    border: 5px solid #1a1a1a;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    box-shadow: 8px 8px 0 rgba(26, 26, 26, 0.15);
    padding: 0;
    overflow: visible;
}

.gif-monitor.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.gif-monitor.closing {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
    transition: none;
}

.about-gif-monitor {
    transform-origin: 28% 82%;
}



/* 思考尾巴 - 从气泡指向人物头部 */
.gif-tail {
    position: absolute;
    left: 8%;
    bottom: -98px;
    width: 140px;
    height: 118px;
    z-index: 1;
    transform: none;
}

.gif-tail .bubble {
    position: absolute;
    display: block;
    background: #fff;
    border: 4px solid #1a1a1a;
    border-radius: 50%;
}

.gif-tail .bubble:nth-child(1) {
    width: 10px;
    height: 10px;
    left: 4px;
    bottom: 0;
}

.gif-tail .bubble:nth-child(2) {
    width: 16px;
    height: 16px;
    left: 42px;
    bottom: 36px;
}

.gif-tail .bubble:nth-child(3) {
    width: 24px;
    height: 24px;
    left: 90px;
    bottom: 78px;
}

/* GIF 充满气泡 */
.gif-monitor .gif-inner {
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: inherit;
    position: relative;
    z-index: 2;
}

.gif-monitor img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 扫描线叠加 */
.gif-monitor .gif-scanline {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 3;
    border-radius: inherit;
    background: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 3px,
        rgba(0, 0, 0, 0.04) 3px,
        rgba(0, 0, 0, 0.04) 6px
    );
    animation: scanMove 3s linear infinite;
}

@keyframes scanMove {
    0% { background-position: 0 0; }
    100% { background-position: 0 60px; }
}

/* TextPressure 动态文字容器 */
.hero-text-pressure {
    position: absolute;
    bottom: 12rem;
    left: 5%;
    right: 5%;
    height: 140px;
    overflow: hidden;
    pointer-events: auto;
    z-index: 1;
    display: none;
}

/* ==================== 文章区域 ==================== */
.articles {
    padding: 8rem 2rem 7rem;
    margin: 0;
    position: relative;
    width: 100%;
    scroll-margin-top: 6rem;
    overflow: visible;
    background: #ffffff;
}

.articles .section-title {
    position: relative;
    z-index: 2;
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 5.5rem;
    pointer-events: auto;
    font-size: 1.05rem;
    font-weight: 400;
    color: rgba(29, 29, 31, 0.58);
    letter-spacing: 0.45em;
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 4rem;
    letter-spacing: 0.3em;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    transition: letter-spacing 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: default;
}

.section-title:hover {
    letter-spacing: 0.5em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--accent);
    transition: width 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), background 0.5s ease;
}

.section-title:hover::after {
    width: 80px;
    background: #d4b87a;
}

/* ==================== 文章卡片网格 ==================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(170px, 230px));
    justify-content: space-between;
    align-items: start;
    gap: 6.5rem 5.75rem;
    max-width: 980px;
    margin: 0 auto;
    padding: 0;
}

.articles-empty {
    grid-column: 1 / -1;
    margin: 0 auto;
    padding: 2rem;
    max-width: 32rem;
    border: 1px dashed rgba(29, 29, 31, 0.16);
    border-radius: 8px;
    color: var(--text-secondary);
    text-align: center;
    letter-spacing: 0.08em;
}

/* 文章卡片 */
.article-card {
    position: relative;
    width: 100%;
    max-width: 230px;
    justify-self: center;
    overflow: visible;
    cursor: pointer;
    background: transparent;
    border-radius: 0;
    color: inherit;
    text-decoration: none;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                opacity 0.6s ease;
    opacity: 0;
    transform: translateY(40px);
}

.article-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.article-card:hover {
    transform: translateY(-10px);
}

.article-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 0.7rem;
}

.book-cover {
    position: relative;
    width: 100%;
    aspect-ratio: 0.705;
    overflow: hidden;
    border-radius: 1px 5px 5px 1px;
    color: #1d1d1f;
    background: #f4f3ef;
    box-shadow:
        20px 28px 30px rgba(29, 29, 31, 0.18),
        3px 0 0 rgba(255, 255, 255, 0.72) inset,
        -8px 0 14px rgba(29, 29, 31, 0.14) inset,
        0 0 0 1px rgba(29, 29, 31, 0.06);
    transform-origin: center bottom;
    transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.55s ease;
}

.article-card:hover .book-cover {
    transform: rotateX(1.5deg) rotateZ(-0.4deg);
    box-shadow:
        24px 34px 34px rgba(29, 29, 31, 0.24),
        3px 0 0 rgba(255, 255, 255, 0.78) inset,
        -8px 0 14px rgba(29, 29, 31, 0.14) inset,
        0 0 0 1px rgba(29, 29, 31, 0.08);
}

.book-cover::before,
.book-cover::after {
    content: '';
    position: absolute;
    pointer-events: none;
}

.book-cover::before {
    inset: 0;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.18), transparent 8%, transparent 92%, rgba(255, 255, 255, 0.22)),
        repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 4px);
    mix-blend-mode: multiply;
    opacity: 0.45;
    z-index: 3;
}

.book-cover::after {
    left: 7px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.45);
    z-index: 4;
}

.cover-art {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.cover-art img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.14;
    filter: grayscale(1) contrast(1.35);
    transform: scale(1.08);
}

.cover-category,
.cover-date,
.cover-title,
.cover-excerpt,
.cover-spine {
    position: absolute;
    z-index: 5;
}

.cover-category {
    top: 1.3rem;
    left: 1.25rem;
    font-size: 0.66rem;
    line-height: 1;
    letter-spacing: 0.28em;
    color: currentColor;
    opacity: 0.68;
}

.cover-title {
    margin: 0;
    font-weight: 600;
    letter-spacing: 0.08em;
    line-height: 1.08;
    max-width: calc(100% - 2.4rem);
    overflow-wrap: anywhere;
    word-break: break-word;
    line-break: anywhere;
}

.cover-excerpt {
    margin: 0;
    font-size: 0.52rem;
    line-height: 1.55;
    color: currentColor;
    opacity: 0.54;
    max-width: 58%;
}

.cover-date {
    right: 1.2rem;
    bottom: 1.2rem;
    font-size: 0.58rem;
    letter-spacing: 0.16em;
    opacity: 0.5;
}

.cover-spine {
    left: 0.45rem;
    top: 1.2rem;
    writing-mode: vertical-rl;
    font-size: 0.48rem;
    letter-spacing: 0.2em;
    opacity: 0.28;
}

.cover-style-1 .book-cover {
    color: #e8eee6;
    background:
        radial-gradient(circle at 28% 20%, rgba(218, 72, 70, 0.8) 0 8%, transparent 14%),
        radial-gradient(circle at 63% 20%, rgba(44, 174, 148, 0.9) 0 8%, transparent 14%),
        radial-gradient(circle at 29% 50%, rgba(44, 174, 148, 0.82) 0 9%, transparent 15%),
        radial-gradient(circle at 64% 50%, rgba(218, 72, 70, 0.8) 0 8%, transparent 14%),
        #17201f;
}

.cover-style-1 .cover-art img {
    opacity: 0.1;
    filter: grayscale(1) blur(2px) contrast(1.4);
}

.cover-style-1 .cover-title {
    top: 2.3rem;
    right: 1.55rem;
    writing-mode: vertical-rl;
    font-size: 1.28rem;
    line-height: 1.55;
    letter-spacing: 0.24em;
    max-height: 70%;
}

.cover-style-1 .cover-excerpt {
    left: 1.2rem;
    bottom: 2.3rem;
}

.cover-style-2 .book-cover {
    color: #111;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.08), transparent 13%),
        #e8e7df;
}

.cover-style-2 .cover-art img {
    top: 1rem;
    left: 2rem;
    right: auto;
    bottom: auto;
    width: 62%;
    height: 36%;
    opacity: 0.14;
    transform: none;
}

.cover-style-2 .cover-title {
    right: 1rem;
    top: 1rem;
    writing-mode: vertical-rl;
    font-size: 1.45rem;
    line-height: 1.25;
    letter-spacing: 0.14em;
}

.cover-style-2 .cover-excerpt {
    left: 1.55rem;
    top: 55%;
    max-width: 50%;
}

.cover-style-3 .book-cover {
    color: #252530;
    background: #df4249;
}

.cover-style-3 .cover-art img {
    opacity: 0.08;
    mix-blend-mode: multiply;
}

.cover-style-3 .cover-title {
    left: 1rem;
    top: 35%;
    right: 1rem;
    max-width: none;
    font-size: clamp(1.42rem, 9.2vw, 1.72rem);
    line-height: 1.05;
    letter-spacing: 0.02em;
    text-wrap: balance;
}

.cover-style-3 .cover-category {
    color: rgba(255, 255, 255, 0.78);
}

.cover-style-3 .cover-excerpt {
    right: 1rem;
    bottom: 3.4rem;
    max-width: 42%;
    color: rgba(255, 255, 255, 0.76);
}

.cover-style-4 .book-cover {
    color: #202020;
    background: #f8f8f6;
}

.cover-style-4 .cover-art img {
    opacity: 0.04;
}

.cover-style-4 .cover-title {
    left: 1.3rem;
    bottom: 2.2rem;
    max-width: 72%;
    font-size: 1rem;
    letter-spacing: 0.22em;
}

.cover-style-4 .cover-excerpt {
    display: none;
}

.cover-style-5 .book-cover {
    color: #f0eee6;
    background: #1f293a;
}

.cover-style-5 .cover-art img {
    opacity: 0.12;
    mix-blend-mode: screen;
}

.cover-style-5 .cover-title {
    left: 1rem;
    top: 18%;
    right: 1rem;
    max-width: none;
    font-size: clamp(1.35rem, 8.3vw, 1.6rem);
    line-height: 1.08;
    letter-spacing: 0.02em;
    text-wrap: balance;
}

.cover-style-5 .cover-excerpt {
    left: 1.25rem;
    bottom: 3.2rem;
    color: rgba(240, 238, 230, 0.72);
}

.cover-style-6 .book-cover {
    color: #ececec;
    background:
        linear-gradient(0deg, rgba(0, 0, 0, 0.28), transparent 40%),
        #2e3032;
}

.cover-style-6 .cover-art img {
    top: 28%;
    bottom: auto;
    height: 26%;
    opacity: 0.32;
    filter: grayscale(1) contrast(1.2);
}

.cover-style-6 .cover-title {
    right: 0.7rem;
    top: 1.4rem;
    writing-mode: vertical-rl;
    font-size: 1.1rem;
    line-height: 1.35;
    letter-spacing: 0.2em;
}

.cover-style-6 .cover-excerpt {
    left: 1.2rem;
    bottom: 3rem;
    color: rgba(236, 236, 236, 0.62);
}

.article-card .card-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
    position: relative;
    background: var(--bg-card);
}

.article-card .card-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.7s ease;
}

.article-card:hover .card-image img {
    transform: scale(1.06);
    filter: brightness(1.12);
}

.article-card .card-image::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 72px;
    background: linear-gradient(to top, var(--bg-card) 0%, rgba(247, 247, 247, 0.92) 18%, transparent 100%);
    pointer-events: none;
}

.card-body {
    display: none;
    position: relative;
    margin-top: -1px;
    padding: 1.5rem 1.5rem 1.8rem;
    background: var(--bg-card);
}

.card-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
    transition: letter-spacing 0.35s ease;
}

.article-card:hover .card-category {
    letter-spacing: 0.25em;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    line-height: 1.5;
    transition: color 0.4s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card:hover .card-title {
    color: var(--accent);
}

.card-excerpt {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.card-date {
    font-size: 0.78rem;
    color: rgba(160, 160, 160, 0.55);
    letter-spacing: 0.08em;
}

/* ==================== 书籍阅读器 ==================== */
.book-reader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(10, 10, 12, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

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

.book-close-btn {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.5);
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.35s ease;
    z-index: 10001;
}

.book-close-btn:hover {
    color: var(--text-primary);
    border-color: rgba(201, 169, 110, 0.6);
    background: rgba(201, 169, 110, 0.1);
    transform: rotate(90deg);
}

/* 书籍容器 */
.book-container {
    perspective: 2000px;
    width: 90vw;
    max-width: 1000px;
}

.book-spread {
    display: flex;
    position: relative;
    width: 100%;
    min-height: 520px;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 书脊 */
.book-spine {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    transform: translateX(-50%);
    background: linear-gradient(to right,
        rgba(201, 169, 110, 0.05),
        rgba(201, 169, 110, 0.3),
        rgba(201, 169, 110, 0.05)
    );
    z-index: 10;
    pointer-events: none;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.4), -2px 0 12px rgba(0, 0, 0, 0.4);
}

/* 书页 */
.book-page {
    flex: 1;
    background: #1e1e1e;
    position: relative;
    overflow: hidden;
    min-height: 520px;
}

.book-page-left {
    border-radius: 12px 0 0 12px;
    border-right: none;
}

.book-page-right {
    border-radius: 0 12px 12px 0;
    border-left: none;
}

.book-page-image {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.book-page-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.96;
    filter: brightness(0.98) saturate(1.08) contrast(1.04);
}

.book-page-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 30, 30, 0.12), rgba(30, 30, 30, 0.03));
}

/* 书页页码 */
.book-page-number {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    font-size: 0.75rem;
    color: rgba(201, 169, 110, 0.4);
    letter-spacing: 0.2em;
    font-family: 'Noto Serif SC', serif;
}

.book-page-number.right-num {
    left: auto;
    right: 2rem;
}

/* 右页内容 */
.book-page-right {
    padding: 3.5rem 3rem 3rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.book-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.book-category {
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.book-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

.book-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
    line-height: 1.4;
}

.book-content {
    flex: 1;
    display: flex;
    flex-direction: row-reverse;
    justify-content: center;
    gap: var(--reader-column-gap, 2rem);
    min-width: 0;
}

.book-content .reader-flow-segment {
    flex: 0 0 auto;
    max-width: 100%;
}

.book-content .reader-text-segment {
    display: flex;
    flex-direction: row-reverse;
    justify-content: space-between;
    width: 100%;
    gap: var(--reader-column-gap, 2rem);
    max-height: var(--reader-content-max-height, 390px);
}

.book-content .vertical-col {
    flex: 0 1 auto;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-feature-settings: "vert" 1, "vrt2" 1;
    line-break: strict;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 2.2;
    letter-spacing: 0.15em;
    max-height: var(--reader-content-max-height, 380px);
    transition: color 0.3s ease;
}

.book-content .vertical-col p {
    margin: 0;
}

.book-content .reader-media-segment {
    flex: 0 0 clamp(150px, 22vw, 240px);
    max-height: var(--reader-content-max-height, 390px);
    overflow: auto;
    writing-mode: horizontal-tb;
}

.book-content.has-media-page .reader-text-segment {
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
}

.book-content.has-media-page .reader-media-segment {
    flex: 0 0 clamp(150px, 28%, 260px);
}

.book-content .reader-media-segment.media-span-full {
    flex-basis: clamp(220px, 42%, 360px);
}

.book-content .reader-media-segment.media-span-half {
    flex-basis: clamp(150px, 28%, 260px);
}

.book-content .reader-media-segment.media-span-third {
    flex-basis: clamp(120px, 20%, 190px);
}

.book-content .reader-media-stack {
    display: flex;
    flex: 0 0 clamp(150px, 22vw, 240px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    max-height: var(--reader-content-max-height, 390px);
    overflow: auto;
    writing-mode: horizontal-tb;
}

.book-content.has-media-page .reader-media-stack {
    flex: 0 0 clamp(150px, 28%, 260px);
}

.book-content .reader-media-stack.media-span-full {
    flex-basis: clamp(220px, 42%, 360px);
}

.book-content .reader-media-stack.media-span-half {
    flex-basis: clamp(150px, 28%, 260px);
}

.book-content .reader-media-stack.media-span-third {
    flex-basis: clamp(120px, 20%, 190px);
}

.book-content .reader-media-stack .reader-media-segment {
    flex: 0 0 auto;
    width: 100%;
    max-height: none;
    overflow: visible;
}

.book-content .reader-media-stack.media-span-full .reader-media-segment.media-span-half {
    width: 50%;
}

.book-content .reader-media-stack.media-span-full .reader-media-segment.media-span-third {
    width: 33.333%;
}

.book-content .reader-media-stack.media-span-half .reader-media-segment.media-span-third {
    width: 66.666%;
}

.book-content .reader-media-stack.stack-count-2 .reader-media-segment img,
.book-content .reader-media-stack.stack-count-2 .reader-media-segment video {
    max-height: min(150px, calc((var(--reader-content-max-height, 390px) - 2rem) / 2));
}

.book-content .reader-media-stack.stack-count-many .reader-media-segment img,
.book-content .reader-media-stack.stack-count-many .reader-media-segment video {
    max-height: min(110px, calc((var(--reader-content-max-height, 390px) - 3rem) / 3));
}

.book-content .reader-media-segment figure {
    margin: 0;
}

.book-content .reader-media-segment img,
.book-content .reader-media-segment video {
    display: block;
    width: 100%;
    max-height: min(320px, var(--reader-content-max-height, 390px));
    border-radius: 6px;
    background: #e8e8e5;
    object-fit: contain;
}

.book-content .reader-media-segment figcaption {
    margin-top: 0.45rem;
    color: rgba(17, 17, 17, 0.48);
    font-size: 0.78rem;
    line-height: 1.7;
    letter-spacing: 0.06em;
}

/* 翻页导航 */
.book-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.book-nav-btn {
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-secondary);
    font-family: 'Noto Serif SC', serif;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.35s ease;
}

.book-nav-btn:hover:not(:disabled) {
    color: var(--accent);
    border-color: rgba(201, 169, 110, 0.5);
    background: rgba(201, 169, 110, 0.08);
}

.book-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.book-progress {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

/* ==================== 旧文章卡片样式保留兼容 ==================== */
/* (已被新的网格卡片替代，移动端响应式保留旧样式作为后备) */

/* 书籍阅读器响应式 */
@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .article-card .card-image {
        height: 200px;
    }

    .book-container {
        width: 95vw;
    }

    .book-spread {
        flex-direction: column;
        min-height: auto;
    }

    .book-page-left {
        border-radius: 12px 12px 0 0;
        min-height: 250px;
    }

    .book-page-right {
        border-radius: 0 0 12px 12px;
        min-height: auto;
        padding: 2rem 1.5rem;
    }

    .book-spine {
        display: none;
    }

    .book-title {
        font-size: 1.4rem;
    }

    .book-content {
        flex-direction: row-reverse;
        justify-content: flex-start;
        min-height: 18rem;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .book-content .vertical-col {
        writing-mode: vertical-rl;
        text-orientation: mixed;
        max-height: min(58vh, 420px);
        font-size: 0.9rem;
    }

    .book-page-number {
        bottom: 1rem;
        left: 1rem;
    }

    .book-page-number.right-num {
        right: 1rem;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 关于区域 */
.about {
    padding: 8rem 5%;
    background: transparent;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.about-text {
    padding-right: 2rem;
}

.about-text .section-title {
    text-align: left;
    left: 0;
    transform: none;
    margin-bottom: 2rem;
}

.about-text .section-title::after {
    left: 0;
    transform: none;
}

.about-text .section-title:hover::after {
    left: 0;
    transform: none;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 2;
    transition: color 0.4s ease;
}

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

.about-image {
    position: relative;
    width: min(100%, 420px);
    aspect-ratio: 1122 / 1402;
    height: auto;
    justify-self: end;
    background: #f5f5f5;
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.5s ease, transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.about-image:hover {
    box-shadow:
        0 0 30px rgba(201, 169, 110, 0.2),
        0 0 60px rgba(201, 169, 110, 0.08),
        0 20px 50px rgba(0, 0, 0, 0.4);
    transform: translateY(-4px);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.7s ease;
}

.about-image:hover img {
    transform: none;
    filter: brightness(1.04);
}

.vertical-quote {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: row;
    gap: 0.8rem;
}

.vertical-quote span {
    writing-mode: vertical-rl;
    font-size: 1.4rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: default;
}

.vertical-quote span:nth-child(1) { transition-delay: 0s; }
.vertical-quote span:nth-child(2) { transition-delay: 0.05s; }
.vertical-quote span:nth-child(3) { transition-delay: 0.1s; }
.vertical-quote span:nth-child(4) { transition-delay: 0.15s; }
.vertical-quote span:nth-child(5) { transition-delay: 0.2s; }

.vertical-quote:hover span {
    color: #d4b87a;
    text-shadow: 0 0 20px rgba(201, 169, 110, 0.4);
    transform: translateY(-4px);
}

/* 页脚 */
.footer {
    padding: 4rem 5%;
    background: transparent;
    border-top: 1px solid var(--border);
    position: relative;
}

.footer-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.footer-brand {
    font-size: 1.5rem;
    color: var(--accent);
    letter-spacing: 0.3em;
    margin-bottom: 1rem;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: default;
    display: inline-block;
}

.footer-brand:hover {
    text-shadow: 0 0 25px rgba(201, 169, 110, 0.6), 0 0 50px rgba(201, 169, 110, 0.25);
    transform: scale(1.08);
    letter-spacing: 0.45em;
}

.footer-copy {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ==================== 文字乱序 Shuffle ==================== */
.shuffle-char-wrapper {
    display: inline-block;
    overflow: hidden;
    vertical-align: bottom;
    position: relative;
}

.shuffle-char-wrapper > span {
    display: inline-flex;
    will-change: transform;
}

/* ==================== 效果控制菜单 ==================== */
.fx-menu {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.menu__item {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 0.82rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    background: transparent;
    text-decoration: none;
    cursor: pointer;
    padding: 0.45rem 0.8rem;
    border: 0;
    border-left: 1px solid transparent;
    text-align: left;
    transition: color 0.35s ease, border-color 0.35s ease, padding-left 0.35s ease;
    user-select: none;
    outline: none;
}

.menu__item:hover {
    color: var(--text-primary);
    border-left-color: rgba(201, 169, 110, 0.4);
    padding-left: 1rem;
}

.menu__item:focus-visible {
    color: var(--accent);
    border-left-color: var(--accent);
}

.menu__item.off {
    color: rgba(160, 160, 160, 0.35);
    border-left-color: transparent;
}

.menu__item.off:hover {
    color: var(--text-secondary);
    border-left-color: rgba(201, 169, 110, 0.2);
}

@media (max-width: 768px) {
    .fx-menu {
        bottom: 1rem;
        right: 1rem;
    }

    .menu__item {
        font-size: 0.75rem;
        padding: 0.35rem 0.6rem;
    }
}

@media (max-width: 1024px) {
    .hero-content {
        flex-direction: column;
        gap: 1.5rem;
    }

    .hero-image-container {
        width: 300px;
        max-width: 100%;
        order: 1;
    }

    .hero-logo {
        order: 1;
        width: clamp(120px, 36vw, 220px);
        max-width: 70vw;
    }

    /* 上方：过简不介 / 记得吃饭 */
    .vertical-text-group.left {
        order: 0;
        flex-direction: column;
        align-items: center;
        gap: 0.3rem;
    }

    /* 下方：长句子 */
    .vertical-text-group.right {
        order: 2;
        flex-direction: column;
        gap: 0.3rem;
    }

    /* 移动端改为横向书写 */
    .vertical-text {
        writing-mode: horizontal-tb;
        font-size: 0.95rem;
        line-height: 1.8;
        display: block;
        text-align: center;
        padding: 0.2rem 0;
        letter-spacing: 0.05em;
    }

    .vertical-text.main-title {
        font-size: 2rem;
        text-align: center;
        writing-mode: horizontal-tb;
    }

    .vertical-text.sub-title {
        font-size: 1.2rem;
        writing-mode: horizontal-tb;
    }

    .vertical-text-group {
        gap: 0.3rem;
    }

    .article-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-card.reverse {
        direction: ltr;
    }

    .vertical-number {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .vertical-quote {
        right: 1rem;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.15rem;
        gap: 1rem;
    }

    .nav-brand {
        flex: 0 1 auto;
        max-width: 10.8rem;
        font-size: 1.18rem;
        line-height: 1.25;
        letter-spacing: 0.08em;
        gap: 0.45rem;
        white-space: nowrap;
    }

    .nav-logo {
        width: 1.45rem;
        height: 1.45rem;
    }

    .nav-links {
        flex: 0 0 auto;
        gap: 0.95rem;
    }

    .nav-links a {
        font-size: 0.82rem;
        letter-spacing: 0.04em;
        white-space: nowrap;
    }

    .hero {
        padding: 5rem 5%;
    }

    .hero-logo {
        width: clamp(110px, 44vw, 190px);
        max-width: 76vw;
    }

    .vertical-text {
        font-size: 0.75rem;
    }

    .vertical-text.main-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .article-title {
        font-size: 1.4rem;
    }

    .about-image {
        width: min(100%, 320px);
        height: auto;
        justify-self: center;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .articles-grid {
        grid-template-columns: repeat(2, minmax(180px, 230px));
        justify-content: center;
        gap: 5.5rem 4rem;
    }
}

@media (max-width: 768px) {
    .articles {
        padding: 6.5rem 1.25rem 5rem;
    }

    .articles .section-title {
        margin-bottom: 4rem;
        font-size: 0.95rem;
    }

    .articles-grid {
        grid-template-columns: minmax(180px, 230px);
        justify-content: center;
        gap: 4.5rem;
    }

    .article-card {
        width: 100%;
        max-width: 230px;
        gap: 0;
    }
}

/* ==================== 文章阅读器：白底黑字 ==================== */
.book-reader-overlay {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #111;
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
}

.book-close-btn {
    border-color: rgba(17, 17, 17, 0.18);
    background: rgba(255, 255, 255, 0.88);
    color: #111;
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
    box-shadow: 0 10px 30px rgba(17, 17, 17, 0.08);
}

.book-close-btn:hover {
    color: #000;
    border-color: rgba(17, 17, 17, 0.42);
    background: #fff;
}

.book-container {
    max-width: 1120px;
}

.book-spread {
    box-shadow: 0 26px 70px rgba(17, 17, 17, 0.14);
}

.book-spine {
    width: 1px;
    background: linear-gradient(to right,
        rgba(17, 17, 17, 0),
        rgba(17, 17, 17, 0.12),
        rgba(17, 17, 17, 0)
    );
    box-shadow: none;
}

.book-page {
    background: #fff;
}

.book-page-left {
    background: #fff;
}

.book-page-right {
    background: #fff;
    color: #111;
    padding: 4rem 3.4rem 3.2rem;
}

.book-page-image img {
    opacity: 1;
    filter: none;
}

.book-page-image::after {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0));
}

.book-reader-overlay.reader-no-images .book-container {
    max-width: 760px;
}

.book-reader-overlay.reader-no-images .book-page-left,
.book-reader-overlay.reader-no-images .book-spine {
    display: none;
}

.book-reader-overlay.reader-no-images .book-page-right {
    flex: 0 0 100%;
    border-radius: 6px;
}

.book-reader-overlay.reader-no-images .book-spread {
    justify-content: center;
}

.book-page-header,
.book-title,
.book-content,
.book-nav,
.book-page-number {
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
}

.book-category {
    color: #111;
    font-size: 0.95rem;
    letter-spacing: 0.22em;
    opacity: 0.7;
}

.book-date {
    color: rgba(17, 17, 17, 0.62);
    font-size: 0.95rem;
}

.book-title {
    color: #050505;
    font-size: 2.45rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    line-height: 1.36;
}

.book-content .vertical-col {
    color: #111;
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
    font-size: 1.08rem;
    line-height: 2.35;
    letter-spacing: 0.18em;
    max-height: 390px;
}

.book-page-number {
    color: rgba(17, 17, 17, 0.38);
    font-size: 0.86rem;
}

.book-nav-btn {
    border-color: rgba(17, 17, 17, 0.16);
    color: rgba(17, 17, 17, 0.62);
    background: rgba(255, 255, 255, 0.7);
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
}

.book-nav-btn:hover:not(:disabled) {
    color: #000;
    border-color: rgba(17, 17, 17, 0.45);
    background: #fff;
}

.book-progress {
    color: rgba(17, 17, 17, 0.62);
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
}

@media (max-width: 768px) {
    .book-page-right {
        padding: 2.2rem 1.5rem;
    }

    .book-title {
        font-size: 1.65rem;
    }

    .book-content .vertical-col {
        font-size: 1rem;
        line-height: 2;
    }
}

/* ==================== 文章阅读器：字体切换 ==================== */
.book-reader-overlay {
    --reader-font-family: 'MaoZeDong', 'Noto Serif SC', serif;
    --reader-title-size: 2.45rem;
    --reader-body-size: 1.08rem;
    --reader-body-line-height: 2.35;
    --reader-body-spacing: 0.18em;
    --reader-column-gap: 2rem;
    --reader-content-max-height: 390px;
    font-family: var(--reader-font-family);
}

.book-reader-overlay.reader-font-mao {
    --reader-font-family: 'MaoZeDong', 'Noto Serif SC', serif;
    --reader-title-size: 2.18rem;
    --reader-body-size: 0.98rem;
    --reader-body-line-height: 1.95;
    --reader-body-spacing: 0.06em;
    --reader-column-gap: 1.15rem;
    --reader-content-max-height: min(430px, calc(100vh - 320px));
}

.book-reader-overlay.reader-font-serif {
    --reader-font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
    --reader-title-size: 2.15rem;
    --reader-body-size: 0.96rem;
    --reader-body-line-height: 2.2;
    --reader-body-spacing: 0.16em;
}

.book-reader-overlay.reader-font-pixel {
    --reader-font-family: 'HYPixel9pxU', 'Noto Serif SC', serif;
    --reader-title-size: 1.8rem;
    --reader-body-size: 0.78rem;
    --reader-body-line-height: 2.25;
    --reader-body-spacing: 0.08em;
}

.book-reader-overlay.reader-font-fun {
    --reader-font-family: 'ZiYuQuWeiXiangSu', 'Noto Serif SC', serif;
    --reader-title-size: 2rem;
    --reader-body-size: 0.94rem;
    --reader-body-line-height: 2.18;
    --reader-body-spacing: 0.12em;
}

.book-font-toolbar {
    position: fixed;
    top: 6.2rem;
    right: 2rem;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.42rem;
    padding: 0.55rem 0.42rem;
    border: 1px solid rgba(17, 17, 17, 0.14);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 10px 30px rgba(17, 17, 17, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.book-font-label {
    padding: 0.25rem 0 0.35rem;
    color: rgba(17, 17, 17, 0.55);
    font-family: 'Noto Serif SC', serif;
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    line-height: 1;
    writing-mode: vertical-rl;
}

.book-toolbar-divider {
    width: 1.35rem;
    height: 1px;
    margin: 0.2rem 0;
    background: rgba(17, 17, 17, 0.12);
}

.book-font-btn {
    width: 2.25rem;
    height: 2.25rem;
    border: 1px solid transparent;
    border-radius: 50%;
    background: transparent;
    color: rgba(17, 17, 17, 0.55);
    cursor: pointer;
    transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.book-font-btn:hover {
    color: #000;
    background: rgba(17, 17, 17, 0.05);
}

.book-font-btn.active {
    color: #000;
    border-color: rgba(17, 17, 17, 0.18);
    background: rgba(17, 17, 17, 0.08);
}

.book-font-btn[data-reader-font="mao"] {
    font-family: 'MaoZeDong', 'Noto Serif SC', serif;
    font-size: 1.1rem;
}

.book-font-btn[data-reader-font="serif"] {
    font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
    font-size: 0.95rem;
}

.book-font-btn[data-reader-font="pixel"] {
    font-family: 'HYPixel9pxU', 'Noto Serif SC', serif;
    font-size: 0.75rem;
}

.book-font-btn[data-reader-font="fun"] {
    font-family: 'ZiYuQuWeiXiangSu', 'Noto Serif SC', serif;
    font-size: 0.9rem;
}

.book-reader-overlay .book-page-header,
.book-reader-overlay .book-title,
.book-reader-overlay .book-content,
.book-reader-overlay .book-nav,
.book-reader-overlay .book-page-number,
.book-reader-overlay .book-nav-btn,
.book-reader-overlay .book-progress {
    font-family: var(--reader-font-family);
}

.book-reader-overlay .book-title {
    font-size: var(--reader-title-size);
}

.book-reader-overlay .book-content {
    gap: var(--reader-column-gap);
}

.book-reader-overlay .book-content .vertical-col {
    font-family: var(--reader-font-family);
    font-size: var(--reader-body-size);
    line-height: var(--reader-body-line-height);
    letter-spacing: var(--reader-body-spacing);
    max-height: var(--reader-content-max-height);
}

.book-reader-overlay.reader-writing-horizontal .book-content {
    display: block;
    min-height: 0;
    max-height: min(48vh, 380px);
    overflow-x: hidden;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.book-reader-overlay.reader-writing-horizontal .book-content .horizontal-col {
    color: #111;
    font-family: var(--reader-font-family);
    font-size: var(--reader-body-size);
    line-height: 2.05;
    letter-spacing: 0.06em;
    writing-mode: horizontal-tb;
}

.book-reader-overlay.reader-writing-horizontal .book-content .horizontal-col p {
    margin: 0 0 1rem;
}

.reader-rich-block {
    margin: 0 0 1.1rem;
}

.reader-rich-block h3 {
    margin: 0 0 0.55rem;
    color: #111;
    font-size: 1.12em;
    line-height: 1.35;
}

.reader-rich-block figure {
    margin: 0;
}

.reader-rich-block img,
.reader-rich-block video {
    display: block;
    width: 100%;
    max-height: 38vh;
    border-radius: 6px;
    background: #e8e8e5;
    object-fit: contain;
}

.reader-rich-block figcaption {
    margin-top: 0.45rem;
    color: rgba(17, 17, 17, 0.48);
    font-size: 0.78rem;
    line-height: 1.7;
}

@media (max-width: 1100px) and (min-width: 769px) {
    .book-container {
        width: min(92vw, 760px);
        max-width: 760px;
    }

    .book-spread {
        min-height: min(86vh, 720px);
    }

    .book-page-left,
    .book-spine {
        display: none;
    }

    .book-page-right {
        flex: 0 0 100%;
        min-height: min(86vh, 720px);
        border-radius: 6px;
        padding: 3.2rem 3rem 3rem;
    }

    .book-reader-overlay.reader-font-mao {
        --reader-content-max-height: min(460px, calc(100vh - 285px));
    }
}

@media (max-width: 768px) {
    .book-reader-overlay {
        height: 100dvh;
        justify-content: flex-start;
        padding: calc(4.75rem + env(safe-area-inset-top)) 0.75rem calc(5.5rem + env(safe-area-inset-bottom));
        overflow: hidden;
    }

    .book-close-btn {
        top: calc(0.75rem + env(safe-area-inset-top));
        right: 0.75rem;
        width: 2.75rem;
        height: 2.75rem;
        background: rgba(255, 255, 255, 0.96);
    }

    .book-font-toolbar {
        top: calc(0.75rem + env(safe-area-inset-top));
        left: 0.75rem;
        right: 4.25rem;
        transform: none;
        flex-direction: row;
        justify-content: center;
        gap: 0.2rem;
        width: auto;
        height: 2.75rem;
        padding: 0.25rem 0.35rem;
        overflow-x: auto;
        overflow-y: hidden;
        border-radius: 999px;
    }

    .book-font-label {
        display: none;
    }

    .book-font-btn {
        flex: 0 0 2rem;
        width: 2rem;
        height: 2rem;
    }

    .book-toolbar-divider {
        flex: 0 0 1px;
        width: 1px;
        height: 1.35rem;
        margin: 0 0.1rem;
    }

    .book-container {
        width: 100%;
        height: 100%;
        min-height: 0;
    }

    .book-spread,
    .book-page-right {
        height: 100%;
        min-height: 0;
    }

    .book-page-right {
        border-radius: 6px;
        padding: 2rem 1.5rem 2.75rem;
    }

    .book-page-header {
        padding-right: 0;
    }

    .book-nav {
        position: fixed;
        left: 0.75rem;
        right: 0.75rem;
        bottom: calc(0.75rem + env(safe-area-inset-bottom));
        z-index: 10001;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
        gap: 0.65rem;
        width: auto;
        margin: 0;
    }

    .book-nav-btn {
        min-width: 0;
        padding: 0.65rem 0.75rem;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        background: rgba(255, 255, 255, 0.96);
    }

    .book-progress {
        white-space: nowrap;
    }

    body.book-reader-open .fx-menu {
        display: none;
    }

    .book-reader-overlay {
        --reader-title-size: 1.65rem;
        --reader-body-size: 1rem;
        --reader-body-line-height: 2;
        --reader-body-spacing: 0.12em;
        --reader-column-gap: 0.85rem;
        --reader-content-max-height: min(58vh, 420px);
    }

    .book-reader-overlay.reader-font-mao {
        --reader-title-size: 1.55rem;
        --reader-body-size: 0.9rem;
        --reader-body-line-height: 1.8;
        --reader-body-spacing: 0.04em;
        --reader-column-gap: 0.75rem;
        --reader-content-max-height: min(58vh, 420px);
    }

    .book-reader-overlay .book-content {
        flex-direction: row-reverse;
        justify-content: flex-start;
        min-height: 18rem;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .book-reader-overlay .book-content .vertical-col {
        writing-mode: vertical-rl;
        text-orientation: mixed;
    }

    .book-reader-overlay.reader-font-pixel {
        --reader-title-size: 1.25rem;
        --reader-body-size: 0.72rem;
    }

    .book-reader-overlay.reader-writing-horizontal .book-content {
        min-height: 0;
        max-height: min(50vh, 390px);
        overflow-y: auto;
    }

    .book-reader-overlay.reader-writing-horizontal .book-page-right {
        padding-right: 1.5rem;
    }

    .book-reader-overlay.reader-writing-horizontal .book-content .horizontal-col {
        line-height: 2;
        letter-spacing: 0.04em;
    }
}

/* ==================== 首页海报式布局响应式覆盖 ==================== */
@media (max-width: 1024px) {
    .hero {
        min-height: auto;
        padding: 7rem 1.75rem 4rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        justify-items: center;
        gap: 2.4rem;
        max-width: 680px;
    }

    .hero-title-panel {
        order: 0;
        padding-top: 0;
        justify-self: center;
    }

    .hero-logo {
        order: 1;
        width: clamp(210px, 42vw, 300px);
        max-width: 80vw;
    }

    .hero-side-panel {
        order: 2;
        padding-top: 0;
        justify-content: center;
    }

    .hero-bottom-copy {
        margin-top: 3.2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 6.2rem 1.15rem 3.4rem;
    }

    .hero-kicker {
        justify-content: center;
        font-size: 0.78rem;
    }

    .hero-grid-title {
        grid-template-columns: repeat(4, 2.75rem);
        margin: 0 auto;
        font-size: 1.45rem;
    }

    .hero-grid-title span {
        width: 2.75rem;
        height: 2.5rem;
    }

    .hero-sub-grid {
        grid-template-columns: repeat(7, 1.45rem);
        margin-left: auto;
        margin-right: auto;
        font-size: 0.76rem;
    }

    .hero-sub-grid span {
        width: 1.45rem;
        height: 1.3rem;
    }

    .hero-logo {
        width: clamp(180px, 58vw, 240px);
    }

    .hero-side-panel {
        gap: 0.85rem;
    }

    .hero-side-title {
        font-size: 1.75rem;
    }

    .hero-side-copy {
        max-height: 255px;
        font-size: 0.78rem;
        line-height: 1.65;
    }

    .hero-bottom-copy {
        font-size: 0.76rem;
        line-height: 1.9;
    }
}

@media (max-width: 420px) {
    .hero-grid-title {
        grid-template-columns: repeat(4, 2.38rem);
        font-size: 1.25rem;
    }

    .hero-grid-title span {
        width: 2.38rem;
        height: 2.22rem;
    }

    .hero-sub-grid {
        grid-template-columns: repeat(7, 1.26rem);
        font-size: 0.68rem;
    }

    .hero-sub-grid span {
        width: 1.26rem;
        height: 1.18rem;
    }

    .hero-side-panel {
        gap: 0.65rem;
    }

    .hero-side-copy {
        max-height: 230px;
    }
}