/* love咪 · 一起看书 · 独立样式（书架 / 阅读器 / 邀请层）
 * 须挂在 #app 内：position:absolute + inset:0 贴合小手机外框（勿用 fixed 铺满浏览器）
 */

#rt-overlay-root {
    position: absolute;
    inset: 0;
    z-index: 100150;
    display: none;
    align-items: stretch;
    justify-content: stretch;
    font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-tap-highlight-color: transparent;
    box-sizing: border-box;
    overflow: hidden;
    border-radius: inherit;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#rt-overlay-root * {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#rt-overlay-root::-webkit-scrollbar,
#rt-overlay-root *::-webkit-scrollbar {
    width: 0 !important;
    height: 0 !important;
    display: none;
}

#rt-overlay-root.is-visible {
    display: flex;
}

.rt-skin {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    min-width: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(180deg, rgba(255, 250, 240, 0.26), rgba(222, 204, 176, 0.16)),
        url("assets/read-together-shelf-bg.jpg?v=1") center / cover no-repeat;
    color: var(--rt-shelf-fg, #3d3128);
}

/* --- 书架（复古玻璃木架） --- */
.rt-shelf-head {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px 8px;
    background: rgba(252, 243, 226, 0.25);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-bottom: 1px solid rgba(132, 89, 48, 0.18);
    box-shadow: 0 8px 22px rgba(92, 60, 34, 0.08);
}

.rt-shelf-head__title {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0;
    color: #463426;
    text-shadow: 0 1px 0 rgba(255, 248, 232, 0.45);
}

.rt-shelf-head__close {
    border: 0;
    background: rgba(255, 248, 231, 0.34);
    color: #5b412e;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    box-shadow: inset 0 0 0 1px rgba(116, 77, 41, 0.16);
}

.rt-shelf-grid {
    flex: 1;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px 12px 22px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px 12px;
    align-content: start;
    background:
        repeating-linear-gradient(
            180deg,
            transparent 0,
            transparent 128px,
            rgba(125, 82, 42, 0.18) 129px,
            rgba(222, 167, 103, 0.18) 135px,
            rgba(255, 246, 219, 0.16) 138px,
            transparent 152px
        );
}

@media (min-width: 400px) {
    .rt-shelf-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.rt-slot {
    aspect-ratio: 3 / 4;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 8px 18px rgba(70, 45, 24, 0.18), 0 1px 0 rgba(255, 248, 232, 0.38) inset;
    border: 1px solid rgba(89, 57, 30, 0.24);
    background: #f8f1e5;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.rt-slot:active {
    transform: scale(0.98);
}

.rt-slot--empty {
    border-style: dashed;
    background: rgba(255, 246, 225, 0.25);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: rgba(66, 47, 34, 0.62);
    font-size: 12px;
}

.rt-slot--empty::before {
    content: "+";
    font-size: 28px;
    font-weight: 300;
    line-height: 1;
    opacity: 0.55;
}

.rt-slot-cover {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-size: cover;
    background-position: center;
    background-color: #f8f1e5;
    opacity: 1;
}

.rt-slot--preset-cover .rt-slot-cover {
    background-size: cover;
    background-position: center;
    filter: saturate(0.92) contrast(1.04);
}

.rt-slot--preset-cover::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(72, 45, 24, 0.24), transparent 13%, transparent 86%, rgba(255, 246, 224, 0.16)),
        linear-gradient(180deg, rgba(255, 250, 235, 0.34), rgba(238, 216, 184, 0.08) 45%, rgba(69, 42, 22, 0.24));
    mix-blend-mode: multiply;
}

.rt-slot--preset-cover::after {
    content: "";
    position: absolute;
    top: 8px;
    bottom: 8px;
    left: 9px;
    z-index: 1;
    width: 1px;
    background: rgba(87, 53, 27, 0.42);
    box-shadow: 2px 0 0 rgba(255, 246, 223, 0.28);
    pointer-events: none;
}

.rt-slot-label {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    padding: 8px 8px 7px;
    font-size: 11px;
    line-height: 1.35;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.55);
    background: linear-gradient(180deg, transparent, rgba(54, 31, 16, 0.66));
    word-break: break-word;
    max-height: 46%;
    overflow: hidden;
}

.rt-slot--preset-cover .rt-slot-label {
    left: 10%;
    right: 10%;
    bottom: 7%;
    padding: 6px 6px 5px;
    border-radius: 4px;
    background: rgba(255, 245, 223, 0.78);
    border: 1px solid rgba(84, 55, 31, 0.24);
    box-shadow: 0 4px 10px rgba(55, 34, 17, 0.18);
    color: #4d382b;
    text-align: center;
    text-shadow: none;
    max-height: 38%;
}

.rt-hint {
    text-align: center;
    font-size: 11px;
    color: rgba(60, 45, 35, 0.62);
    padding: 0 16px 10px;
    margin: 0;
    background: rgba(252, 243, 226, 0.25);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-top: 1px solid rgba(132, 89, 48, 0.12);
}

.rt-shelf {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    background: rgba(252, 243, 226, 0.25);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.rt-shelf::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(106, 70, 38, 0.12), rgba(255, 246, 219, 0.08) 34%, rgba(112, 72, 37, 0.10) 100%),
        repeating-linear-gradient(90deg, rgba(89, 57, 30, 0.06) 0 1px, transparent 1px 22px);
}

.rt-shelf > * {
    position: relative;
    z-index: 1;
}

/* 书架：长按书籍后的操作表 */
.rt-shelf-sheet-backdrop {
    position: absolute;
    inset: 0;
    z-index: 50;
    display: none;
    align-items: flex-end;
    justify-content: center;
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom, 0px));
    background: rgba(30, 40, 46, 0.38);
    box-sizing: border-box;
}

.rt-shelf-sheet-backdrop.is-visible {
    display: flex;
}

.rt-shelf-sheet {
    width: 100%;
    max-width: 340px;
    border-radius: 18px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 -8px 28px rgba(0, 0, 0, 0.16);
}

.rt-shelf-sheet__title {
    padding: 14px 16px 8px;
    font-size: 13px;
    font-weight: 700;
    color: rgba(44, 58, 66, 0.75);
    text-align: center;
}

.rt-shelf-sheet__btn {
    width: 100%;
    padding: 14px 18px;
    border: none;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    background: transparent;
    font-size: 15px;
    font-weight: 600;
    color: var(--rt-shelf-fg, #2c3a42);
    cursor: pointer;
    font-family: inherit;
}

.rt-shelf-sheet__btn:active {
    background: rgba(0, 0, 0, 0.05);
}

.rt-shelf-sheet__btn--danger {
    color: #b33a3a;
}

.rt-shelf-sheet__btn--muted {
    font-weight: 500;
    color: rgba(44, 58, 66, 0.5);
}

/* --- 阅读器 --- */
.rt-reader {
    flex: 1;
    display: none;
    flex-direction: column;
    min-height: 0;
    position: relative;
    background:
        linear-gradient(180deg, rgba(246, 246, 244, 0.92), rgba(226, 226, 222, 0.94)),
        radial-gradient(circle at 18% 0%, rgba(255, 255, 255, 0.72), transparent 32%);
    color: var(--rt-read-fg, #333333);
}

.rt-reader.is-visible {
    display: flex;
}

.rt-reader[data-rt-theme="hblue"] {
    --rt-read-bg: #f2f2ef;
    --rt-read-fg: #333333;
    --rt-read-title: #242424;
    --rt-read-muted: rgba(51, 51, 51, 0.56);
    --rt-read-accent: #7d8e98;
    --rt-read-highlight: rgba(167, 190, 203, 0.5);
}

.rt-reader[data-rt-theme="dpink"] {
    --rt-read-bg: #f4f1ef;
    --rt-read-fg: #342f2d;
    --rt-read-title: #2b2928;
    --rt-read-muted: rgba(52, 47, 45, 0.56);
    --rt-read-accent: #a08c88;
    --rt-read-highlight: rgba(202, 183, 177, 0.5);
}

.rt-reader[data-rt-theme="mint"] {
    --rt-read-bg: #EDF8F3;
    --rt-read-fg: #2d4a3e;
    --rt-read-title: #1f3329;
    --rt-read-muted: rgba(45, 74, 62, 0.56);
    --rt-read-accent: #A5C4B9;
    --rt-read-highlight: rgba(165, 196, 185, 0.5);
}

.rt-reader[data-rt-theme="lavender"] {
    --rt-read-bg: #DEEDFD;
    --rt-read-fg: #3a4a5e;
    --rt-read-title: #2a3545;
    --rt-read-muted: rgba(58, 74, 94, 0.56);
    --rt-read-accent: #9AB7C9;
    --rt-read-highlight: rgba(154, 183, 201, 0.5);
}

.rt-reader[data-rt-theme="rose"] {
    --rt-read-bg: #FDEDED;
    --rt-read-fg: #4a3a3e;
    --rt-read-title: #3a2a2e;
    --rt-read-muted: rgba(74, 58, 62, 0.56);
    --rt-read-accent: #C99B9A;
    --rt-read-highlight: rgba(201, 155, 154, 0.5);
}

.rt-reader[data-rt-theme="sage"] {
    --rt-read-bg: #D8E6E0;
    --rt-read-fg: #2f4540;
    --rt-read-title: #1f3530;
    --rt-read-muted: rgba(47, 69, 64, 0.56);
    --rt-read-accent: #7a9a8e;
    --rt-read-highlight: rgba(122, 154, 142, 0.5);
}

.rt-topbar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    background: rgba(246, 246, 243, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(42, 42, 42, 0.08);
    /* 高于 Char 悬浮球/台词气泡（z-index 10～11），避免长气泡盖住顶栏按钮 */
    position: relative;
    z-index: 12;
}

.rt-topbar__left,
.rt-topbar__right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.rt-icon-btn {
    border: 0;
    background: rgba(255, 255, 255, 0.68);
    color: inherit;
    border-radius: 8px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 17px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 0 1px rgba(40, 40, 40, 0.08);
}

.rt-topbar__title {
    flex: 1;
    min-width: 0;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--rt-read-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.rt-flip-wrap {
    flex: 1;
    min-height: 0;
    padding: 12px 14px 8px;
    overflow: hidden;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.035), transparent 12%, transparent 88%, rgba(0, 0, 0, 0.025)),
        var(--rt-read-bg, #f2f2ef);
}

.rt-flip-sheet {
    height: 100%;
    width: 100%;
    position: relative;
    border-radius: 6px;
    background:
        linear-gradient(90deg, rgba(54, 54, 54, 0.07), transparent 10%, transparent 90%, rgba(255, 255, 255, 0.44)),
        linear-gradient(180deg, #fbfbf8, #f0f0eb);
    box-shadow: 0 14px 32px rgba(36, 36, 32, 0.14), inset 0 0 0 1px rgba(60, 60, 56, 0.08);
    border: 1px solid rgba(70, 70, 64, 0.12);
    overflow: hidden;
}

.rt-flip-sheet.is-fading-out {
    opacity: 0.18;
    transform: translateY(2px);
    transition: opacity 0.13s ease, transform 0.13s ease;
}

.rt-flip-sheet.is-fading-in {
    animation: rt-page-fade-in 0.28s ease both;
}

@keyframes rt-page-fade-in {
    from { opacity: 0.18; transform: translateY(3px); }
    to { opacity: 1; transform: translateY(0); }
}

.rt-read-scroll {
    height: 100%;
    overflow: hidden;
    padding: 20px 22px 16px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.rt-chapter-tag {
    flex-shrink: 0;
    font-size: 10px;
    letter-spacing: 0;
    color: var(--rt-read-accent);
    opacity: 0.78;
    margin-bottom: 8px;
    text-align: center;
    font-family: "Times New Roman", "Songti SC", serif;
}

.rt-page-title {
    flex-shrink: 0;
    font-family: "LoveMiHuiwenMingchao", "Songti SC", "STSong", "Source Han Serif SC", serif;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.45;
    color: var(--rt-read-title);
    margin: 16px 0 22px;
    text-align: center;
    letter-spacing: 0;
}

.rt-page-title.is-hidden {
    display: none;
}

.rt-page-body {
    flex: 1;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    touch-action: pan-y;
    font-family: "LoveMiHuiwenMingchao", "Songti SC", "STSong", "Source Han Serif SC", serif;
    font-size: 16px;
    line-height: 1.9;
    letter-spacing: 0;
    color: var(--rt-read-fg);
    user-select: text;
    -webkit-user-select: text;
    text-align: justify;
}

.rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-reader[data-rt-theme="dpink"] .rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-reader[data-rt-theme="mint"] .rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-reader[data-rt-theme="lavender"] .rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-reader[data-rt-theme="rose"] .rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-reader[data-rt-theme="sage"] .rt-page-body::selection {
    background: var(--rt-read-highlight);
}

.rt-anno-list { display: none; }

/* 划线虚线标记 */
.rt-anno-mark {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 2px 0 8px;
    padding: 3px 8px;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.62);
    color: var(--rt-read-accent, #7d8e98);
    font: inherit;
    font-size: 11px;
    line-height: 1.2;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}
.rt-anno-mark::before,
.rt-anno-mark::after {
    content: none;
}
.rt-anno-mark__dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--rt-read-accent, #7d8e98);
    opacity: 0.7;
    flex-shrink: 0;
}

.rt-anno-mark__label {
    font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.rt-anno-highlight {
    padding: 0 0.05em;
    border-radius: 3px;
    background: var(--rt-read-highlight, rgba(167, 190, 203, 0.5));
    color: inherit;
    cursor: pointer;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

/* 划线评论磨砂气泡（不设内部滚动；超长内容由 .rt-page-body 统一纵向滚动） */
.rt-anno-popup {
    position: relative;
    margin: 4px 0 10px;
    padding: 10px 13px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    font-size: 12px;
    line-height: 1.65;
    color: var(--rt-read-fg);
    word-break: break-word;
    animation: rt-popup-in 0.18s ease;
    overflow-x: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    touch-action: pan-y;
}
.rt-reader[data-rt-theme="dpink"] .rt-anno-popup {
    background: rgba(242, 234, 236, 0.88);
}

.rt-reader[data-rt-theme="mint"] .rt-anno-popup {
    background: rgba(237, 248, 243, 0.88);
}

.rt-reader[data-rt-theme="lavender"] .rt-anno-popup {
    background: rgba(222, 237, 253, 0.88);
}

.rt-reader[data-rt-theme="rose"] .rt-anno-popup {
    background: rgba(253, 237, 237, 0.88);
}

.rt-reader[data-rt-theme="sage"] .rt-anno-popup {
    background: rgba(216, 230, 224, 0.88);
}
@keyframes rt-popup-in {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}
.rt-anno-popup__quote {
    font-size: 11px;
    color: var(--rt-read-muted);
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px dashed rgba(0,0,0,0.08);
    font-style: italic;
}
.rt-anno-popup__user {
    margin-bottom: 4px;
}
.rt-anno-popup__char {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed rgba(0,0,0,0.08);
    padding-left: 8px;
    border-left: 2px solid var(--rt-read-accent, #3d6d84);
}
.rt-anno-popup__who {
    font-size: 11px;
    font-weight: 600;
    opacity: 0.65;
    margin-bottom: 2px;
}

.rt-chapter-board {
    flex-shrink: 0;
    margin-top: 10px;
    padding: 9px;
    border-radius: 8px;
    background: rgba(246, 246, 243, 0.72);
    border: 1px solid rgba(60, 60, 56, 0.08);
}

.rt-chapter-board__head {
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 7px;
    color: var(--rt-read-title);
}

.rt-thread {
    max-height: 74px;
    overflow: auto;
    margin-bottom: 8px;
}

.rt-thread-msg {
    font-size: 11px;
    line-height: 1.5;
    margin-bottom: 6px;
    padding: 5px 7px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.03);
}

.rt-thread-msg--char {
    background: rgba(61, 109, 132, 0.09);
}

.rt-reader[data-rt-theme="dpink"] .rt-thread-msg--char {
    background: rgba(154, 102, 116, 0.12);
}

.rt-reader[data-rt-theme="mint"] .rt-thread-msg--char {
    background: rgba(165, 196, 185, 0.12);
}

.rt-reader[data-rt-theme="lavender"] .rt-thread-msg--char {
    background: rgba(154, 183, 201, 0.12);
}

.rt-reader[data-rt-theme="rose"] .rt-thread-msg--char {
    background: rgba(201, 155, 154, 0.12);
}

.rt-reader[data-rt-theme="sage"] .rt-thread-msg--char {
    background: rgba(122, 154, 142, 0.12);
}

.rt-thread-meta {
    font-size: 10px;
    opacity: 0.65;
    margin-bottom: 2px;
}

.rt-thread-input-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.rt-thread-input-row input {
    flex: 1;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 7px 9px;
    font-size: 12px;
    background: rgba(255, 255, 255, 0.85);
    color: inherit;
}

.rt-thread-input-row button {
    border: 0;
    border-radius: 8px;
    padding: 7px 11px;
    font-size: 12px;
    font-weight: 600;
    background: var(--rt-read-accent);
    color: #fff;
    cursor: pointer;
    opacity: 0.92;
}

.rt-bottom-nav {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0));
    background: rgba(246, 246, 243, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid rgba(42, 42, 42, 0.08);
    position: relative;
    z-index: 12;
}

.rt-bottom-nav button {
    flex: 1;
    border: 0;
    border-radius: 8px;
    padding: 11px 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.68);
    color: inherit;
    box-shadow: inset 0 0 0 1px rgba(40, 40, 40, 0.08);
}

.rt-bottom-nav button:disabled {
    opacity: 0.4;
}

.rt-bottom-nav__hint {
    font-size: 11px;
    text-align: center;
    color: var(--rt-read-muted);
    flex: 1.2;
}

/* --- 邀请好友 --- */
.rt-invite-panel {
    position: absolute;
    inset: 0;
    background: rgba(233, 238, 242, 0.96);
    z-index: 25;
    display: none;
    flex-direction: column;
    min-height: 0;
}

.rt-invite-panel.is-visible {
    display: flex;
}

.rt-invite-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    background: rgba(255, 255, 255, 0.5);
}

.rt-invite-list {
    flex: 1;
    overflow: auto;
    padding: 12px;
}

.rt-invite-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.55);
    margin-bottom: 8px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.rt-invite-ava {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.06) center/cover;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.rt-invite-meta {
    flex: 1;
    min-width: 0;
}

.rt-invite-name {
    font-size: 14px;
    font-weight: 600;
}

.rt-invite-bar {
    flex-shrink: 0;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    background: rgba(255, 255, 255, 0.55);
}

.rt-invite-bar button {
    border: 0;
    border-radius: 12px;
    padding: 11px 18px;
    font-weight: 700;
    cursor: pointer;
}

.rt-invite-bar button[data-act="cancel"] {
    background: rgba(0, 0, 0, 0.07);
    color: inherit;
}

.rt-invite-bar button[data-act="send"] {
    background: #3d6d84;
    color: #fff;
}

/* --- 备注弹层 --- */
.rt-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 25;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.rt-modal-backdrop.is-visible {
    display: flex;
}

.rt-modal {
    width: 100%;
    max-width: 320px;
    background: #fff;
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}

.rt-modal h3 {
    margin: 0 0 8px;
    font-size: 15px;
}

.rt-modal textarea {
    width: 100%;
    min-height: 72px;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    padding: 10px;
    font-size: 14px;
    resize: vertical;
    box-sizing: border-box;
    font-family: inherit;
}

.rt-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 12px;
}

.rt-modal-actions button {
    border: 0;
    border-radius: 10px;
    padding: 9px 14px;
    font-weight: 600;
    cursor: pointer;
}

.rt-modal-actions button[data-act="ok"] {
    background: #3d6d84;
    color: #fff;
}

/* --- 微信 · 一起看书邀请卡片 --- */
#chat-page .chat-message .chat-message-bubble.chat-message-bubble--rt-invite {
    overflow: visible !important;
}

.chat-rt-invite-card {
    width: 100%;
    max-width: 236px;
    border-radius: 18px;
    padding: 12px 14px 12px;
    background: linear-gradient(180deg, #e3edf2 0%, #f5f9fb 100%);
    border: 1px solid rgba(61, 109, 132, 0.22);
    box-shadow: 0 8px 22px rgba(61, 109, 132, 0.1);
    color: #243338;
}

.chat-rt-invite-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
}

.chat-rt-invite-tag {
    display: inline-flex;
    align-items: center;
    height: 20px;
    padding: 0 9px;
    border-radius: 999px;
    background: rgba(61, 109, 132, 0.2);
    color: #2c5870;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.chat-rt-invite-chip {
    display: inline-flex;
    align-items: center;
    height: 20px;
    padding: 0 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.chat-rt-invite-chip--pending {
    background: rgba(255, 255, 255, 0.72);
    color: #5a6d78;
}

.chat-rt-invite-chip--accept {
    background: rgba(78, 168, 122, 0.18);
    color: #2f7c54;
}

.chat-rt-invite-chip--reject {
    background: rgba(155, 116, 130, 0.16);
    color: #7a5564;
}

.chat-rt-invite-title {
    font-size: clamp(13px, 3.9vw, 15px);
    line-height: 1.4;
    font-weight: 700;
    color: #243338;
    margin-bottom: 6px;
}

.chat-rt-invite-body {
    font-size: 12px;
    line-height: 1.55;
    color: #3d4f59;
    word-break: break-word;
}

.chat-rt-invite-sub {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed rgba(61, 109, 132, 0.2);
    font-size: 11px;
    line-height: 1.5;
    color: #5a6d78;
}

/* --- Char 悬浮球 --- */
.rt-char-ball {
    position: absolute;
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: #fff center/cover no-repeat;
    box-shadow: 0 3px 12px rgba(0,0,0,0.18);
    border: 2px solid rgba(255,255,255,0.9);
    cursor: pointer;
    z-index: 10;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    transition: opacity 0.35s ease, box-shadow 0.15s;
    opacity: 1;
}
.rt-char-ball.rt-char-ball--idle {
    opacity: 0.75;
}
.rt-char-ball:active {
    box-shadow: 0 5px 18px rgba(0,0,0,0.28);
}

/* --- Char 情绪气泡（台词可较长：加宽 + 必要时内部纵向滚动，避免被 200px 宽挤成无限高裁切） --- */
.rt-char-bubble {
    position: absolute;
    max-width: min(272px, calc(100% - 44px));
    max-height: min(46vh, 360px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 9px 12px;
    border-radius: 16px 16px 4px 16px;
    background: #fff;
    box-shadow: 0 4px 16px rgba(0,0,0,0.13);
    border: 1px solid rgba(0,0,0,0.07);
    font-size: 13px;
    line-height: 1.6;
    color: #2a3338;
    z-index: 11;
    cursor: default;
    word-break: break-word;
    animation: rt-bubble-in 0.22s ease;
    opacity: 1;
    transition: opacity 0.28s ease, box-shadow 0.2s ease;
}
.rt-char-bubble.rt-char-bubble--dimmed {
    opacity: 0.6;
}
.rt-reader[data-rt-theme="dpink"] .rt-char-bubble {
    border-color: rgba(154,102,116,0.18);
}

.rt-reader[data-rt-theme="mint"] .rt-char-bubble {
    border-color: rgba(165,196,185,0.18);
}

.rt-reader[data-rt-theme="lavender"] .rt-char-bubble {
    border-color: rgba(154,183,201,0.18);
}

.rt-reader[data-rt-theme="rose"] .rt-char-bubble {
    border-color: rgba(201,155,154,0.18);
}

.rt-reader[data-rt-theme="sage"] .rt-char-bubble {
    border-color: rgba(122,154,142,0.18);
}

/* --- 配色选择器 --- */
.rt-theme-picker {
    position: absolute;
    top: 52px;
    right: 10px;
    z-index: 30;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.08);
    min-width: 140px;
}

.rt-theme-picker.is-visible {
    display: flex;
}

.rt-theme-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: #333;
    transition: background 0.15s ease;
}

.rt-theme-option:hover {
    background: rgba(0, 0, 0, 0.04);
}

.rt-theme-option.is-active {
    background: rgba(61, 109, 132, 0.1);
    font-weight: 600;
}

.rt-theme-circle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.rt-theme-circle::before,
.rt-theme-circle::after {
    content: '';
    position: absolute;
    width: 50%;
    height: 100%;
    top: 0;
}

.rt-theme-circle::before {
    left: 0;
}

.rt-theme-circle::after {
    right: 0;
}

/* 各配色方案的圆形显示 */
.rt-theme-circle[data-theme="hblue"]::before {
    background: #f2f2ef;
}
.rt-theme-circle[data-theme="hblue"]::after {
    background: #7d8e98;
}

.rt-theme-circle[data-theme="dpink"]::before {
    background: #f4f1ef;
}
.rt-theme-circle[data-theme="dpink"]::after {
    background: #a08c88;
}

.rt-theme-circle[data-theme="mint"]::before {
    background: #EDF8F3;
}
.rt-theme-circle[data-theme="mint"]::after {
    background: #A5C4B9;
}

.rt-theme-circle[data-theme="lavender"]::before {
    background: #DEEDFD;
}
.rt-theme-circle[data-theme="lavender"]::after {
    background: #9AB7C9;
}

.rt-theme-circle[data-theme="rose"]::before {
    background: #FDEDED;
}
.rt-theme-circle[data-theme="rose"]::after {
    background: #C99B9A;
}

.rt-theme-circle[data-theme="sage"]::before {
    background: #D8E6E0;
}
.rt-theme-circle[data-theme="sage"]::after {
    background: #7a9a8e;
}

/* 划线评论：Char 回复前缀为好友备注/昵称，不再展示模型 attitude 标签 */
.rt-anno-char-who {
    font-weight: 600;
    color: var(--rt-read-title);
    margin-right: 2px;
}
@keyframes rt-bubble-in {
    from { opacity: 0; transform: scale(0.85) translateY(6px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* --- 阅读正文排版优化 --- */
.rt-page-body p {
    margin: 0 0 0.82em;
    text-indent: 2em;
    break-inside: avoid;
}
.rt-page-body p:last-child {
    margin-bottom: 0;
}

/* Char 头像快捷菜单 · 换书弹层 */
.rt-char-quick-menu {
    position: absolute;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 140px;
    padding: 8px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.14);
    border: 1px solid rgba(0, 0, 0, 0.06);
}
.rt-char-quick-item {
    border: none;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    background: rgba(61, 109, 132, 0.08);
    color: #2a3f4a;
}
.rt-char-quick-item:active {
    opacity: 0.88;
}
.rt-book-pick-overlay {
    position: absolute;
    inset: 0;
    z-index: 50;
    background: rgba(20, 28, 36, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.rt-book-pick-panel {
    width: 100%;
    max-width: 320px;
    max-height: 85%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}
.rt-book-pick-title {
    margin: 0;
    padding: 14px 16px 6px;
    font-size: 16px;
    font-weight: 700;
    color: #1e2a30;
}
.rt-book-pick-hint {
    margin: 0;
    padding: 0 16px 10px;
    font-size: 12px;
    line-height: 1.45;
    color: #5a6d78;
}
.rt-book-pick-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 12px 10px;
    -webkit-overflow-scrolling: touch;
}
.rt-book-pick-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 8px;
    border-radius: 10px;
    margin-bottom: 6px;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.06);
}
.rt-book-pick-row:hover {
    background: rgba(61, 109, 132, 0.06);
}
.rt-book-pick-row-txt {
    font-size: 13px;
    line-height: 1.45;
    color: #2a3338;
    flex: 1;
}
.rt-book-pick-actions {
    display: flex;
    gap: 10px;
    padding: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}
.rt-book-pick-actions button {
    flex: 1;
    padding: 10px;
    border-radius: 12px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.rt-book-pick-cancel {
    background: rgba(0, 0, 0, 0.06);
    color: #333;
}
.rt-book-pick-ok {
    background: linear-gradient(135deg, #5a8ca8, #3d6d84);
    color: #fff;
}