/* ========== Manual Page - 完美复刻设计 ========== */

:root {
    --manual-bg: #EDE8DF;
    --manual-surface: #F5F1E9;
    --manual-card-bg: rgba(255, 252, 246, 0.82);
    --manual-card-border: rgba(170, 155, 130, 0.28);
    --manual-card-shadow: 0 2px 12px rgba(120, 100, 70, 0.06);
    --manual-text-primary: #5A4D3A;
    --manual-text-secondary: #7A6B58;
    --manual-text-muted: #A09380;
    --manual-accent-brown: #C4A882;
    --manual-accent-warm: #D4B896;
    --manual-accent-green: #A8BC98;
    --manual-nav-bg: #1a1a1a;
    --manual-nav-text: #D4CCC0;
    --manual-radius-sm: 6px;
    --manual-radius-md: 10px;
    --manual-radius-lg: 16px;
    --manual-font-display: "Georgia", "Noto Serif SC", "STSong", serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ===== 页面进入动画 ===== */
@keyframes pageEnter {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes staggerFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 全局 & 背景 ===== */
.manual-page {
    background-color: var(--manual-bg);
    color: var(--manual-text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: visible;
    position: relative;
    animation: pageEnter 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ===== 顶部导航栏 ===== */
.manual-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--manual-nav-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255,255,255,.06);
    padding: 0 clamp(20px, 4vw, 48px);
    height: 44px;
    display: flex;
    align-items: center;
    animation: slideDown 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.nav-inner {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 18px;
}

.nav-back-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--manual-nav-text);
    text-decoration: none;
    font-size: 12px;
    font-weight: 500;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.nav-back-btn:hover {
    opacity: 1;
}

.nav-back-btn svg {
    width: 16px;
    height: 16px;
}

.nav-brand-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.nav-main-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--manual-nav-text);
    margin: 0;
    letter-spacing: 0.02em;
}

.nav-sub-name {
    font-size: 10px;
    color: var(--manual-nav-text);
    margin: 0;
    opacity: 0.6;
    letter-spacing: 0.05em;
}

.nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-brand {
    color: var(--manual-nav-text);
    font-family: var(--manual-font-display);
    font-size: 13px;
    letter-spacing: .15em;
    opacity: .85;
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-tool {
    color: var(--manual-nav-text);
    font-size: 14px;
    cursor: pointer;
    opacity: .6;
    transition: opacity .2s;
}
.nav-tool:hover { opacity: 1; }

/* ===== 主内容布局 ===== */
.manual-main {
    position: relative;
    z-index: 1;
    padding: 28px clamp(24px, 4vw, 56px) 60px;
    animation: fadeInScale 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.magazine-layout {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr 280px;
    gap: 22px;
    align-items: start;
}

/* ===== 卡片通用样式 ===== */
.card-bordered {
    background: var(--manual-card-bg);
    border: 1px solid var(--manual-card-border);
    border-radius: var(--manual-radius-md);
    box-shadow: var(--manual-card-shadow);
    padding: 18px 20px;
    position: relative;
    transition: box-shadow .3s, transform .25s;
}
.card-bordered:hover {
    box-shadow: 0 6px 20px rgba(120, 100, 70, .1);
    transform: translateY(-1px);
}

/* ===== 左侧：插画列 ===== */
.left-illustration-col {
    display: flex;
    flex-direction: column;
    gap: 18px;
    animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.3s both;
}

.illustration-frame {
    position: relative;
    border-radius: var(--manual-radius-lg);
    zoom: 1.6;
    width: fit-content;
}
.illustration-frame img {
    display: block;
    width: 260px;
    height: auto;
    border-radius: var(--manual-radius-lg);
}

/* 左下文字卡片 */
.left-bottom-card {
    padding: 16px 18px;
    width: 416px;
    box-sizing: border-box;
}

.card-header-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.card-icon-small {
    font-size: 12px;
    color: var(--manual-accent-brown);
}

.card-title-sm {
    font-family: var(--manual-font-display);
    font-size: 13px;
    font-weight: 600;
    color: var(--manual-text-primary);
    margin: 0;
}

.card-body-text p {
    font-size: 12px;
    line-height: 1.65;
    color: var(--manual-text-secondary);
    margin: 0;
}

.card-footer-line {
    margin-top: 12px;
    height: 1px;
    background: linear-gradient(90deg, var(--manual-accent-brown), transparent);
    opacity: .25;
}

/* ===== 中间：内容列（不规则纸张感） ===== */
.center-content-col {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    background: var(--manual-card-bg);
    border-radius: 4px 20px 16px 6px / 18px 8px 22px 12px;
    padding: 28px 24px 24px;
    box-shadow:
        0 1px 2px rgba(120, 100, 70, 0.04),
        0 4px 16px rgba(120, 100, 70, 0.07),
        0 12px 40px rgba(120, 100, 70, 0.06),
        inset 0 0 60px rgba(196, 168, 130, 0.04);
    clip-path: polygon(
        0% 3px,     0.4% 0%,     2% 0.2%,    4.5% 0%,
        7% 2px,     10% 0.5%,   14% 0%,      18% 1.5px,
        23% 0.3%,   28% 1px,    33% 0%,       38% 2px,
        43% 0.5%,   48% 0%,     53% 1.5px,    58% 0.3%,
        63% 1px,    68% 0%,     73% 2px,      78% 0.5%,
        83% 0%,     88% 1.5px,  93% 0.3%,     97% 1px,
        99.5% 0%,   100% 4px,   100% 96%,
        99% 99.5%,  96% 100%,   93% 98.5%,   89% 100%,
        85% 98.5%,  81% 100%,   77% 99%,      73% 100%,
        69% 98.5%,  65% 100%,   61% 98.5%,   57% 100%,
        53% 99%,    49% 100%,   45% 98.5%,   41% 100%,
        37% 99%,    33% 100%,   29% 98.5%,   25% 100%,
        21% 99%,    17% 100%,   13% 98.5%,   9% 100%,
        5% 99%,     2% 100%,    0% 97%
    );
    animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

.center-content-col::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background-image:
        radial-gradient(ellipse 80% 50% at 20% 10%, rgba(212, 184, 150, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 80% 90%, rgba(196, 168, 130, 0.06) 0%, transparent 65%);
    pointer-events: none;
    z-index: 0;
}

.center-content-col > *:not(.paper-flower):not(::before) {
    position: relative;
    z-index: 2;
}

/* ===== 纸张边缘花朵装饰 ===== */
.paper-flower {
    position: absolute;
    pointer-events: none;
    z-index: 1;
    opacity: 0.72;
    filter: drop-shadow(0 2px 6px rgba(120, 100, 70, 0.15));
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.4s ease;
}

.paper-flower:hover {
    opacity: 0.95;
    transform: scale(1.08) rotate(3deg);
}

.paper-flower-tl {
    top: -18px;
    left: -16px;
    width: 75px;
    height: auto;
    transform: rotate(-22deg);
    animation: paper-flower-sway-tl 7s ease-in-out infinite;
}

.paper-flower-tr {
    top: -12px;
    right: -14px;
    width: 60px;
    height: auto;
    transform: rotate(15deg);
    opacity: 0.55;
    animation: paper-flower-sway-tr 9s ease-in-out infinite;
}

.paper-flower-br {
    bottom: -20px;
    right: -12px;
    width: 90px;
    height: auto;
    transform: rotate(35deg);
    animation: paper-flower-sway-br 8s ease-in-out infinite;
}

.paper-flower-bl {
    bottom: 8px;
    left: -10px;
    width: 56px;
    height: auto;
    transform: rotate(-30deg);
    opacity: 0.5;
    animation: paper-flower-sway-bl 10s ease-in-out infinite;
}

@keyframes paper-flower-sway-tl {
    0%, 100% { transform: rotate(-22deg) translateY(0); }
    50% { transform: rotate(-18deg) translateY(-3px); }
}

@keyframes paper-flower-sway-tr {
    0%, 100% { transform: rotate(15deg) translateY(0); }
    50% { transform: rotate(19deg) translateY(-2px); }
}

@keyframes paper-flower-sway-br {
    0%, 100% { transform: rotate(35deg) translateY(0); }
    50% { transform: rotate(31deg) translateY(2px); }
}

@keyframes paper-flower-sway-bl {
    0%, 100% { transform: rotate(-30deg) translateY(0); }
    50% { transform: rotate(-26deg) translateY(2px); }
}

/* 大标题卡 */
.hero-title-card {
    background: var(--manual-card-bg);
    border: 1px solid var(--manual-card-border);
    border-radius: var(--manual-radius-lg);
    padding: 26px 28px 22px;
    box-shadow: var(--manual-card-shadow);
    position: relative;
}

.hero-title-top {
    margin-bottom: 10px;
}

.hero-label {
    font-size: 10px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--manual-text-muted);
    font-weight: 500;
}

.hero-main-title {
    font-family: var(--manual-font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--manual-text-primary);
    margin: 0 0 12px;
    letter-spacing: -.01em;
    line-height: 1.2;
}

.hero-subtitle-text {
    font-size: 13px;
    line-height: 1.7;
    color: var(--manual-text-secondary);
    margin: 0 0 16px;
}

.hero-divider-line {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--manual-accent-brown), transparent);
    opacity: .2;
}

/* 信息标签行 */
.info-tags-row {
    display: flex;
    gap: 12px;
}

.info-tag-item {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--manual-card-bg);
    border: 1px solid var(--manual-card-border);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 11px;
}

.tag-icon {
    font-size: 12px;
    color: var(--manual-accent-brown);
}
.tag-edit {
    cursor: pointer;
    opacity: .5;
    font-size: 11px;
}
.tag-label {
    color: var(--manual-text-secondary);
    font-weight: 500;
    letter-spacing: .05em;
}

/* 文字段落卡 */
.text-block-card {
    padding: 16px 20px;
}

.tb-paragraph {
    font-size: 13px;
    line-height: 1.65;
    color: var(--manual-text-secondary);
    margin: 0;
}

/* 引用卡 */
.quote-card {
    padding: 20px 22px;
    background: linear-gradient(135deg, rgba(245,241,233,.95) 0%, rgba(255,252,246,.9) 100%);
}

.quote-text {
    font-family: var(--manual-font-display);
    font-style: italic;
    font-size: 14px;
    line-height: 1.75;
    color: var(--manual-text-secondary);
    margin: 0;
}

/* 按钮组 */
.button-group-row {
    display: flex;
    gap: 10px;
    padding: 4px 0;
}

.pill-btn {
    background: var(--manual-surface);
    border: 1px solid var(--manual-card-border);
    border-radius: 20px;
    padding: 8px 22px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .08em;
    color: var(--manual-text-muted);
    cursor: pointer;
    transition: all .25s;
    font-family: inherit;
}
.pill-btn:hover {
    background: var(--manual-card-bg);
    color: var(--manual-text-secondary);
    box-shadow: 0 2px 8px rgba(120,100,70,.08);
}
.pill-active {
    background: var(--manual-accent-warm);
    color: #fff;
    border-color: var(--manual-accent-brown);
    opacity: .75;
}
.pill-active:hover {
    opacity: .9;
}

/* ===== 右侧：信息列 ===== */
.right-info-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
    animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.5s both;
}

/* 状态卡 */
.status-card {
    padding: 18px 20px;
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.status-badge {
    font-family: var(--manual-font-display);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .1em;
    color: #5a7248;
    background: rgba(168, 188, 152, 0.25);
    padding: 2px 10px;
    border-radius: 2px;
    border-bottom: 2px solid rgba(168, 188, 152, 0.45);
    text-transform: uppercase;
}

.status-actions {
    font-size: 13px;
    color: var(--manual-text-muted);
    cursor: pointer;
    letter-spacing: 2px;
}

.status-title {
    font-family: var(--manual-font-display);
    font-size: 17px;
    font-weight: 700;
    color: var(--manual-text-primary);
    margin: 0 0 8px;
    line-height: 1.35;
}

.status-desc {
    font-size: 12px;
    line-height: 1.65;
    color: var(--manual-text-secondary);
    margin: 0 0 12px;
}

.status-meta-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--manual-text-muted);
}

.meta-item {
    font-weight: 500;
}
.meta-sep { opacity: .4; }

/* 特色卡片 */
.feature-card {
    padding: 20px 20px;
    text-align: center;
}

.feature-icon-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(212,184,150,.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.feature-emoji-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    filter: brightness(0.6) sepia(0.8) hue-rotate(70deg) saturate(2.5) brightness(0.85);
}

.feature-card-title {
    font-family: var(--manual-font-display);
    font-size: 15px;
    font-weight: 700;
    color: var(--manual-text-primary);
    margin: 0 0 8px;
}

.feature-card-text {
    font-size: 12px;
    line-height: 1.7;
    color: var(--manual-text-secondary);
    margin: 0 0 14px;
}

.feature-tag-row {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.ftag {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .04em;
    padding: 4px 12px;
    border-radius: 12px;
    background: rgba(196,168,130,.15);
    color: var(--manual-accent-brown);
}
.ftag-light {
    background: rgba(160,148,128,.1);
    color: var(--manual-text-muted);
}

/* 小卡片网格 */
.mini-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.mini-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 14px 8px;
    border-radius: var(--manual-radius-sm);
    border: 1px solid var(--manual-card-border);
    background: var(--manual-card-bg);
    cursor: pointer;
    transition: all .2s;
}
.mini-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(120,100,70,.1);
}

.mc-label {
    font-size: 9px;
    font-weight: 600;
    letter-spacing: .06em;
    color: var(--manual-text-muted);
}

.mc-label img,
img.mc-label {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.mc-brown { background: rgba(196,168,130,.12); }
.mc-beige { background: rgba(212,184,150,.1); }
.mc-warm { background: rgba(200,170,130,.14); }

/* 底部信息条 */
.bottom-info-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
}

.bis-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bis-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    overflow: hidden;
    border: 1.5px solid var(--manual-card-border);
    background: var(--manual-surface);
}
.bis-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bis-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.bis-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--manual-text-primary);
}
.bis-date {
    font-size: 10px;
    color: var(--manual-text-muted);
}

.bis-action {
    font-size: 18px;
    color: var(--manual-text-muted);
    cursor: pointer;
    opacity: .5;
    transition: opacity .2s;
}
.bis-action:hover { opacity: .9; }

/* ===== 底部新栏目区域 ===== */
.bottom-sections-layout {
    max-width: 1240px;
    margin: 32px auto 0;
    display: grid;
    grid-template-columns: 320px 1fr auto;
    gap: 22px;
    align-items: stretch;
    animation: slideUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.6s both;
}

/* 左侧目录图片 */
.toc-image-frame {
    position: relative;
    border-radius: var(--manual-radius-lg);
    overflow: hidden;
    box-shadow: none;
    transition: transform .25s;
    flex-grow: 1;
}

.toc-image-frame:hover {
    transform: translateY(-1px);
}

.toc-image-frame img {
    display: block;
    width: 90%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--manual-radius-lg);
}

.toc-image-frame img.toc-stamp-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-6deg);
    width: 70%;
    height: auto;
    opacity: 0.15;
    filter: sepia(1) hue-rotate(10deg) saturate(0.7) brightness(0.65) contrast(1.1);
    mix-blend-mode: multiply;
    pointer-events: none;
    z-index: 2;
}

.toc-artistic-text {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-2deg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    z-index: 5;
    pointer-events: none;
    line-height: 1;
}

.art-text-line {
    font-family: "Georgia", "Playfair Display", "Noto Serif SC", serif;
    font-size: 22px;
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.12em;
    color: #8B7355;
    text-shadow:
        0 1px 2px rgba(255, 252, 240, 0.6),
        0 0 20px rgba(139, 115, 85, 0.15);
    white-space: nowrap;
    animation: art-text-gentle 4s ease-in-out infinite;
    line-height: 1;
}

.art-text-sub {
    font-size: 18px;
    letter-spacing: 0.25em;
    padding-left: 0.15em;
}

@keyframes art-text-gentle {
    0%, 100% { opacity: 0.9; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(-1px); }
}

/* 中间列 */
.bottom-center-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* 右侧列 */
.bottom-right-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.detail-footer {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 24px 20px 32px;
    border-top: 1px solid rgba(170, 155, 130, 0.15);
    background: var(--manual-bg);
}

.detail-footer p {
    font-family: var(--font-body);
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--manual-text-muted);
    margin: 0;
}

/* ===== 信封卡片 ===== */
.envelope-card {
    padding: 0;
    overflow: hidden;
    width: 100%;
    max-width: 420px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.envelope-card-img {
    width: calc(100% - 10px);
    height: auto;
    display: block;
    margin: 5px auto;
}

.envelope-card-body {
    padding: 0 20px 16px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.envelope-text {
    font-size: 12px;
    line-height: 1.75;
    color: var(--manual-text-secondary);
    margin: 0 0 14px;
}

.envelope-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 10px;
    margin-top: auto;
    border-top: 1px solid rgba(170, 155, 130, 0.15);
}

.envelope-date {
    font-family: var(--manual-font-display);
    font-size: 11px;
    font-weight: 600;
    color: var(--manual-text-muted);
    letter-spacing: .08em;
}

.envelope-seal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(196, 168, 130, 0.2);
    color: var(--manual-accent-brown);
    font-size: 13px;
    cursor: pointer;
    transition: background .25s;
}
.envelope-seal:hover {
    background: rgba(196, 168, 130, 0.35);
}

/* ===== 响应式适配 ===== */
@media (max-width: 1024px) {
    .magazine-layout {
        grid-template-columns: 260px 1fr 240px;
        gap: 16px;
    }
    .hero-main-title { font-size: 26px; }
}

@media (max-width: 860px) {
    .magazine-layout {
        grid-template-columns: 1fr 1fr;
    }
    .left-illustration-col {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 16px;
    }
    .right-info-col {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .status-card,
    .feature-card {
        grid-column: span 1;
    }
}

@media (max-width: 600px) {
    .nav-center { display: none; }
    .magazine-layout {
        grid-template-columns: 1fr;
    }
    .left-illustration-col {
        grid-template-columns: 1fr;
    }
    .right-info-col {
        grid-template-columns: 1fr;
    }
    .mini-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 底部区域响应式 */
@media (max-width: 1024px) {
    .bottom-sections-layout {
        grid-template-columns: 220px 1fr 260px;
        gap: 16px;
    }
}

@media (max-width: 860px) {
    .bottom-sections-layout {
        grid-template-columns: 1fr 1fr;
    }
    .bottom-left-col {
        grid-column: 1 / -1;
    }
    .toc-image-frame {
        max-width: 320px;
        margin: 0 auto;
    }
    .bottom-center-col {
        grid-column: 1 / 2;
    }
    .bottom-right-col {
        grid-column: 2 / 3;
    }
}

@media (max-width: 600px) {
    .bottom-sections-layout {
        grid-template-columns: 1fr;
    }
    .bottom-left-col,
    .bottom-center-col,
    .bottom-right-col {
        grid-column: 1 / -1;
    }
}

/* ===== FAQ 卡片通用样式 ===== */
.faq-card {
    transition: box-shadow .3s, transform .25s;
    position: relative;
    overflow: hidden;
    flex-grow: 1;
    animation: staggerFadeIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.faq-card:nth-child(1) {
    animation-delay: 0.7s;
}

.faq-card:nth-child(2) {
    animation-delay: 0.8s;
}

.faq-card:nth-child(3) {
    animation-delay: 0.9s;
}

.faq-card:nth-child(4) {
    animation-delay: 1s;
}

.faq-card:nth-child(5) {
    animation-delay: 1.1s;
}

.faq-card:nth-child(6) {
    animation-delay: 1.2s;
}

.card-deco {
    position: absolute;
    bottom: -4px;
    right: -4px;
    width: 56px;
    height: auto;
    opacity: 0.7;
    pointer-events: none;
    z-index: 0;
}

.faq-card:hover {
    box-shadow: 0 8px 28px rgba(120, 100, 70, .12);
    transform: translateY(-2px);
}

.faq-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.faq-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.faq-title {
    font-family: var(--manual-font-display);
    font-size: 15px;
    font-weight: 700;
    color: var(--manual-text-primary);
    margin: 0;
}

.faq-quote-title {
    font-style: normal;
    color: var(--manual-text-primary);
}

/* Tips 提示文字 */
.faq-tips {
    margin-top: 14px !important;
    padding: 12px 0;
    font-size: 12px !important;
    line-height: 1.75 !important;
    color: var(--manual-text-secondary) !important;
    position: relative;
}

.faq-tips::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 0;
    width: 28px;
    height: 2px;
    background: var(--manual-accent-brown);
    transform: rotate(-12deg);
    transform-origin: left center;
    opacity: 0.35;
}

.faq-tips-small {
    margin-top: 12px;
    padding: 10px 0;
    font-size: 11px;
    line-height: 1.7;
    color: var(--manual-text-secondary);
    position: relative;
}

.faq-tips-small::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--manual-accent-green);
    transform: rotate(-12deg);
    transform-origin: left center;
    opacity: 0.4;
}

/* FAQ 高亮卡片 */
.faq-highlight {
    background: linear-gradient(135deg, rgba(255,252,246,.95) 0%, rgba(245,241,233,.9) 100%);
    border-color: rgba(196, 168, 130, 0.35);
}

/* ===== 无障碍支持 - 减少动画 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .manual-page {
        animation: none !important;
    }
    
    .manual-nav,
    .manual-main,
    .left-illustration-col,
    .center-content-col,
    .right-info-col,
    .bottom-sections-layout,
    .faq-card {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
    
    .paper-flower {
        animation: none !important;
    }
}