:root {
    --inv-main-red: #b31010;
    --inv-red-glow: rgba(179, 0, 0, 0.35);
    --inv-dark-bg: #0c0c10;
    --inv-dark-gradient: linear-gradient(160deg, #15151a 0%, #0c0c10 100%);
    --inv-text-white: #ffffff;
    --inv-text-gray: #b8b8c0;
    --inv-text-faint: #888896;
    --inv-border-dark: #2a2a30;
    --inv-shadow: 0 8px 30px rgba(0,0,0,0.3);
    --inv-radius: 12px;
    --inv-container-max: 1400px;
    --inv-gap-base: 16px;
}

body {
    background-color: #f5f5f7;
}

/* 去除邀请页顶部半透明遮罩 —— header 保持纯白 */
.header .header-box,
.header.fixed .header-box {
    background-color: #fff !important;
    opacity: 1 !important;
    filter: none !important;
}

.invitation-page {
    color: #666670;
    line-height: 1.7;
}

.invitation-page .inv-container {
    max-width: var(--inv-container-max);
    margin: 0 auto;
    padding: 0 16px;
    width: 100%;
}

.invitation-page .inv-section-title {
    font-size: 26px;
    text-align: center;
    margin-bottom: 8px;
    font-weight: 500;
    color: #1a1a22;
    letter-spacing: 1px;
}

.invitation-page .inv-section-subtitle {
    font-size: 14px;
    text-align: center;
    margin-bottom: 28px;
    font-weight: 300;
    color: #888896;
    letter-spacing: 2px;
}

/* ========== HERO 区域 —— 深色背景 + 右侧全铺图片 ========== */
.invitation-page .hero {
    width: 100%;
    min-height: 100vh;
    padding: 0;
    background: var(--inv-dark-gradient);
    position: relative;
    overflow: hidden;
    color: #fff;
    margin: 0;
}

/* 邀请函图片 —— 铺满右侧 50vw */
.invitation-page .invitation-box {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 50vw;
    overflow: hidden;
    z-index: 1;
    border-radius: 0;
    box-shadow: none;
}

/* 左侧文字容器 —— 绝对定位占左半部分，与图片不重叠 */
.invitation-page .hero .inv-container {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 50vw;
    padding: 80px 60px 60px 40px;
    box-sizing: border-box;
    z-index: 2;
    max-width: none;
    display: flex;
    align-items: center;
}

.invitation-page .hero-row {
    width: 100%;
}

.invitation-page .hero::before {
    content: "";
    position: absolute;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(179, 0, 0, 0.18) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    opacity: 1;
    pointer-events: none;
}

.invitation-page .hero-text {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: relative;
    z-index: 3;
}

.invitation-page .hero-tag {
    width: fit-content;
    font-size: 15px;
    letter-spacing: 1.5px;
    color: #b8b8c0;
    border: 1px solid #3a3a42;
    padding: 8px 20px;
    border-radius: 40px;
    backdrop-filter: blur(6px);
}

.invitation-page .hero-title {
    font-size: 52px;
    line-height: 1.18;
    font-weight: 600;
    color: #ffffff;
}

.invitation-page .hero-title span {
    color: var(--inv-main-red);
}

.invitation-page .hero-desc {
    font-size: 17px;
    color: #a0a0aa;
    max-width: 480px;
}

.invitation-page .series-wrap {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.invitation-page .series-card {
    flex: 1;
    padding: 18px 12px;
    border: 1px solid #3a3a42;
    border-radius: var(--inv-radius);
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(4px);
    text-align: center;
    transition: 0.3s ease;
    cursor: pointer;
}

.invitation-page .series-card:hover {
    border-color: var(--inv-main-red);
    background: rgba(179, 0, 0, 0.1);
    transform: translateY(-4px);
}

.invitation-page .series-name {
    font-size: 15px;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.invitation-page .series-tip {
    font-size: 12px;
    color: #888896;
    margin-top: 4px;
}

.invitation-page .btn-main {
    width: fit-content;
    padding: 16px 46px;
    background: transparent;
    border: 1px solid var(--inv-main-red);
    color: #ff4444;
    border-radius: 999px;
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.3s ease;
}

.invitation-page .btn-main:hover {
    background: var(--inv-main-red);
    color: #fff;
    box-shadow: 0 0 20px var(--inv-red-glow);
}

.invitation-page .invitation-box img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.invitation-page .invitation-countdown {
    position: absolute;
    right: 18px;
    bottom: 18px;
    z-index: 3;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    color: #ddd;
    font-size: 13px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.invitation-page .invitation-countdown .count-label {
    color: #ccc;
}

.invitation-page .invitation-countdown .count-num {
    color: #ff5555;
    font-weight: 600;
    font-size: 15px;
    min-width: 38px;
    text-align: center;
}

/* ========== 轮播区 —— 深色背景（与 hero 区分的纯深色） ========== */
.invitation-page .fair-carousel {
    padding: 60px 0;
    background: #101016;
    color: #ddd;
}

.invitation-page .inv-section-title {
    color: #e0e0e8;
}

.invitation-page .inv-section-subtitle {
    color: #888896;
}

.invitation-page .carousel-box {
    position: relative;
    width: 100%;
    border-radius: var(--inv-radius);
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.5);
}

.invitation-page .carousel-track {
    display: flex;
    width: 300%;
    transition: transform 0.6s ease;
}

.invitation-page .carousel-item {
    width: calc(100% / 3);
    flex-shrink: 0;
}

.invitation-page .carousel-item img {
    width: 100%;
    height: 630px;
    object-fit: cover;
    display: block;
}

.invitation-page .carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    color: #333;
    z-index: 10;
    transition: 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.invitation-page .carousel-arrow:hover {
    background: var(--inv-main-red);
    color: #fff;
}

.invitation-page .arrow-prev { left: 16px; }
.invitation-page .arrow-next { right: 16px; }

.invitation-page .carousel-dots {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.invitation-page .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
}

.invitation-page .dot.active {
    background: var(--inv-main-red);
    width: 28px;
    border-radius: 6px;
}

.invitation-page .book-area {
    padding: 70px 0;
    background: #f8f8fa;
    color: #333;
}

.invitation-page .book-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--inv-gap-base);
}

.invitation-page .benefit-left {
    background: #fff;
    padding: 40px 36px;
    border-radius: var(--inv-radius);
    box-shadow: 0 2px 16px rgba(0,0,0,0.07);
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.invitation-page .booth-subtitle {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #111;
}

.invitation-page .booth-two-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.invitation-page .single-booth {
    border: 1px solid #eee;
    border-radius: 8px;
    padding: 22px 16px;
    text-align: center;
}

.invitation-page .booth-hall-name {
    color: var(--inv-main-red);
    font-weight: 600;
    font-size: 18px;
    margin-bottom: 8px;
}

.invitation-page .booth-code {
    font-size: 16px;
    margin-bottom: 8px;
    color: #222;
}

.invitation-page .booth-range {
    font-size: 15px;
    color: #666;
}

.invitation-page .benefit-tip {
    color: var(--inv-main-red);
    font-size: 15px;
    font-weight: 500;
}

.invitation-page .benefit-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 32px;
    color: #111;
}

.invitation-page .benefit-list {
    list-style: none;
    padding: 0;
}

.invitation-page .benefit-list li {
    font-size: 17px;
    margin: 26px 0;
    padding-left: 38px;
    position: relative;
    color: #333;
}

.invitation-page .benefit-list li::before {
    content: "✓";
    color: var(--inv-main-red);
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 22px;
}

.invitation-page .appoint-right {
    background: #fff;
    padding: 40px 36px;
    border-radius: var(--inv-radius);
    box-shadow: 0 2px 16px rgba(0,0,0,0.07);
}

.invitation-page .form-title {
    font-size: 26px;
    margin-bottom: 32px;
    font-weight: 600;
    text-align: center;
    color: #111;
}

.invitation-page .form-subtitle {
    font-size: 16px;
    margin-bottom: 12px;
    font-weight: 500;
    color: #222;
}

.invitation-page .hall-wrap {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
}

.invitation-page .hall-item {
    flex: 1;
    text-align: center;
    padding: 14px;
    border: 1px solid #eee;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    color: #333;
}

.invitation-page .hall-item.active {
    border-color: var(--inv-main-red);
    background: #fff5f5;
    color: var(--inv-main-red);
    font-weight: 500;
}

.invitation-page .date-scroll {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding: 8px 4px 12px;
    margin-bottom: 24px;
    scrollbar-width: thin;
}

.invitation-page .date-scroll::-webkit-scrollbar {
    height: 4px;
}

.invitation-page .date-scroll::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 2px;
}

.invitation-page .date-item {
    min-width: 92px;
    height: 56px;
    padding: 0 8px;
    border: 1px solid #eee;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    flex-shrink: 0;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: #333;
}

.invitation-page .date-item.active {
    border-color: var(--inv-main-red);
    background: #fff5f5;
    color: var(--inv-main-red);
    font-weight: 600;
}

.invitation-page .period-wrap {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
}

.invitation-page .period-item {
    flex: 1;
    text-align: center;
    padding: 14px;
    border: 1px solid #eee;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    color: #333;
}

.invitation-page .period-item.active {
    border-color: var(--inv-main-red);
    background: #fff5f5;
    color: var(--inv-main-red);
}

.invitation-page .form-line {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 18px;
}

.invitation-page .form-full {
    grid-column: 1 / -1;
}

.invitation-page .appoint-right input,
.invitation-page .appoint-right select,
.invitation-page .appoint-right textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #eee;
    border-radius: 8px;
    font-size: 16px;
    color: #222;
    background: #fff;
}

.invitation-page .appoint-right input:focus,
.invitation-page .appoint-right select:focus,
.invitation-page .appoint-right textarea:focus {
    outline: none;
    border-color: var(--inv-main-red);
}

.invitation-page .submit-btn {
    width: 100%;
    background: var(--inv-main-red);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 8px;
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.invitation-page .submit-btn:hover {
    background: #9e0000;
}

.invitation-page .form-message {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 18px;
    display: none;
    font-size: 15px;
}

.invitation-page .form-message.success {
    display: block;
    background: #e6f7e6;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.invitation-page .form-message.error {
    display: block;
    background: #fdecea;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
    /* ---- Hero 区域：绝对定位 → 正常流堆叠 ---- */
    .invitation-page .hero {
        min-height: auto;
        padding: 0;
        position: static;
        display: block;
    }

    /* 图片取消绝对定位，放到最上方全宽显示 */
    .invitation-page .invitation-box {
        position: relative;
        width: 100%;
        height: 280px;
        top: auto;
        right: auto;
        bottom: auto;
        border-radius: 0;
    }
    .invitation-page .invitation-box img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        max-height: none;
    }

    /* 文字容器取消绝对定位，正常流显示在图片下方 */
    .invitation-page .hero .inv-container {
        position: static;
        width: 100%;
        padding: 32px 20px 40px;
        display: block;
    }

    .invitation-page .hero-row {
        width: 100%;
    }

    .invitation-page .hero-text {
        gap: 18px;
        align-items: flex-start;
    }

    .invitation-page .hero-tag {
        font-size: 12px;
        padding: 6px 14px;
        letter-spacing: 1px;
    }

    .invitation-page .hero-title {
        font-size: 28px;
        line-height: 1.25;
    }

    .invitation-page .hero-desc {
        font-size: 14px;
        max-width: 100%;
    }

    .invitation-page .hero::before {
        width: 300px;
        height: 300px;
        top: -80px;
        right: -80px;
    }

    /* Series 卡片：横排变竖排 */
    .invitation-page .series-wrap {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }

    .invitation-page .series-card {
        padding: 14px 10px;
    }

    /* 按钮 */
    .invitation-page .btn-main {
        padding: 12px 32px;
        font-size: 15px;
    }

    /* 倒计时浮层 —— 跟随图片 */
    .invitation-page .invitation-countdown {
        right: 12px;
        bottom: 12px;
        padding: 6px 10px;
        font-size: 11px;
        gap: 6px;
    }
    .invitation-page .invitation-countdown .count-num {
        font-size: 13px;
        min-width: 28px;
    }

    /* ---- 轮播区 ---- */
    .invitation-page .fair-carousel {
        padding: 36px 0;
    }
    .invitation-page .inv-section-title {
        font-size: 20px;
        margin-bottom: 24px;
        padding: 0 16px;
    }
    .invitation-page .carousel-item img {
        height: 300px;
    }
    .invitation-page .carousel-arrow {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    .invitation-page .arrow-prev { left: 10px; }
    .invitation-page .arrow-next { right: 10px; }
    .invitation-page .dot {
        width: 8px;
        height: 8px;
    }
    .invitation-page .dot.active {
        width: 20px;
    }

    /* ---- 表单区 ---- */
    .invitation-page .book-area {
        padding: 36px 0;
    }
    .invitation-page .inv-container {
        max-width: 100%;
        padding: 0 16px;
        margin: 0 auto;
    }
    .invitation-page .book-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .invitation-page .benefit-left,
    .invitation-page .appoint-right {
        padding: 24px 18px;
    }
    .invitation-page .booth-subtitle,
    .invitation-page .form-title {
        font-size: 20px;
        text-align: center;
    }
    .invitation-page .booth-two-wrap {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .invitation-page .benefit-title {
        font-size: 20px;
        margin-bottom: 20px;
    }
    .invitation-page .benefit-list li {
        font-size: 15px;
        margin: 18px 0;
        padding-left: 28px;
    }
    .invitation-page .benefit-list li::before {
        font-size: 18px;
    }
    .invitation-page .form-subtitle {
        font-size: 14px;
        margin-bottom: 8px;
    }
    .invitation-page .hall-wrap,
    .invitation-page .period-wrap {
        gap: 10px;
        flex-wrap: wrap;
    }
    .invitation-page .hall-item,
    .invitation-page .period-item {
        flex: 1 1 45%;
        padding: 12px 6px;
        font-size: 14px;
    }
    .invitation-page .date-item {
        min-width: 72px;
        height: 48px;
        font-size: 14px;
    }
    .invitation-page .form-line {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 14px;
    }
    .invitation-page .appoint-right input,
    .invitation-page .appoint-right select,
    .invitation-page .appoint-right textarea {
        padding: 12px;
        font-size: 15px;
    }
    .invitation-page .submit-btn {
        padding: 14px;
        font-size: 15px;
    }
}

/* 小屏手机（<=480px）进一步缩小 */
@media (max-width: 480px) {
    .invitation-page .hero-title {
        font-size: 24px;
    }
    .invitation-page .hero-tag {
        font-size: 11px;
        padding: 5px 12px;
    }
    .invitation-page .invitation-box {
        height: 220px;
    }
    .invitation-page .carousel-item img {
        height: 255px;
    }
    .invitation-page .series-name {
        font-size: 14px;
    }
    .invitation-page .hero .inv-container {
        padding: 24px 16px 32px;
    }
}

/* 横屏手机/平板小屏 */
@media (min-width: 769px) and (max-width: 1024px) {
    .invitation-page .hero .inv-container {
        padding: 70px 30px 50px 30px;
    }
    .invitation-page .hero-title {
        font-size: 40px;
    }
    .invitation-page .invitation-box {
        width: 50vw;
    }
}