/* ========================================
   邀请函主样式 - 移动优先响应式
   色彩体系: 绿色+金黄 (油菜花+太行山)
   ======================================== */

/* --- CSS Variables --- */
:root {
    --color-primary: #4a7c59;
    --color-primary-light: #6a9e74;
    --color-primary-dark: #365c42;
    --color-gold: #f0c040;
    --color-gold-light: #f5d76e;
    --color-gold-dark: #d4a017;
    --color-bg: #fefdf5;
    --color-bg-section: #ffffff;
    --color-text: #2c3e2d;
    --color-text-light: #5a6b5c;
    --color-text-muted: #8a9b8c;
    --color-border: #e8e5d8;
    --color-accent: #c0392b;
    --color-success: #27ae60;
    --color-sky-top: #7ec8e3;
    --color-sky-bottom: #b8dde8;

    --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-xs: 12px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;

    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);

    --container-max: 640px;
    --transition: all 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* --- Sections Common --- */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--color-gold);
    margin: var(--spacing-xs) auto 0;
    border-radius: 2px;
}

.section-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* --- Toolbar (字号/暗黑模式) --- */
.toolbar {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 1000;
    display: flex;
    gap: 6px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.toolbar:hover {
    opacity: 1;
}

.toolbar-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.9);
    color: var(--color-text);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.toolbar-btn:active {
    transform: scale(0.92);
}

/* ========================================
   S1: Hero 封面
   ======================================== */
.section-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
    /* 真实花海背景图 + 渐变遮罩增强文字可读性 */
    background:
        linear-gradient(180deg,
            rgba(0,0,0,0.15) 0%,
            rgba(0,0,0,0.05) 30%,
            rgba(0,0,0,0) 50%,
            rgba(0,0,0,0.05) 70%,
            rgba(0,0,0,0.25) 100%
        ),
        url("../images/2.jpg") no-repeat center center;
    background-size: cover;
}

/* 底部金色渐变过渡层 */
.section-hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30%;
    background: linear-gradient(to top, rgba(254,253,245,0.6) 0%, transparent 100%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-theme-badge {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 30px;
    color: #fff;
    font-size: var(--font-size-sm);
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: #fff;
    text-shadow: 0 2px 16px rgba(0,0,0,0.35), 0 0 40px rgba(0,0,0,0.15);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 4px;
    line-height: 1.3;
}

.hero-event-name {
    font-size: var(--font-size-lg);
    color: rgba(255,255,255,0.95);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 1px 8px rgba(0,0,0,0.3);
}

.hero-date {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: rgba(255,255,255,0.25);
    border-radius: var(--radius-md);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.hero-date .icon-calendar {
    width: 20px;
    height: 20px;
}

/* 嘉宾徽章 */
.guest-badge {
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(255,255,255,0.85));
    border: 2px solid var(--color-gold);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    display: inline-block;
    box-shadow: 0 4px 20px rgba(240,192,64,0.3);
    position: relative;
    overflow: hidden;
}

.guest-badge::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold), var(--color-gold-dark), var(--color-gold));
}

.guest-badge-label {
    font-size: var(--font-size-xs);
    color: var(--color-gold-dark);
    letter-spacing: 3px;
    font-weight: 600;
    margin-bottom: 4px;
}

.guest-badge-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}

.guest-badge-org {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: 4px;
}

/* 向下滚动箭头 */
.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.7);
    font-size: var(--font-size-xs);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    animation: bounce 2s ease infinite;
}

.scroll-hint-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255,255,255,0.7);
    border-bottom: 2px solid rgba(255,255,255,0.7);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   S2: 活动介绍
   ======================================== */
.section-intro {
    background: var(--color-bg-section);
}

.intro-text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 2;
    text-align: justify;
    text-indent: 2em;
}

.intro-highlight {
    background: linear-gradient(transparent 60%, rgba(240,192,64,0.3) 60%);
    font-weight: 600;
    color: var(--color-text);
}

/* 活动介绍配图 */
.intro-image {
    margin-top: var(--spacing-lg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.intro-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.intro-image:hover img {
    transform: scale(1.02);
}

.intro-image-caption {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--spacing-xs);
    background: var(--color-bg);
}

/* ========================================
   S3: 活动流程 - 时间线
   ======================================== */
.section-schedule {
    background: var(--color-bg);
}

.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-gold), var(--color-primary));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--color-gold);
    border: 2px solid var(--color-bg);
    box-shadow: 0 0 0 3px var(--color-gold);
    z-index: 1;
}

.timeline-item.active::before {
    background: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary);
    animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 3px var(--color-primary); }
    50% { box-shadow: 0 0 0 6px rgba(74,124,89,0.3); }
}

.timeline-time {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 2px;
}

.timeline-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.timeline-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   S4: 景区亮点 - 卡片网格
   ======================================== */
.section-highlights {
    background: var(--color-bg-section);
}

.highlights-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.highlight-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.highlight-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 带图片的亮点卡片 */
.highlight-card-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.highlight-card-body {
    padding: var(--spacing-md);
}

.highlight-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
    color: #fff;
    font-size: 24px;
}

.highlight-card-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.highlight-card-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* 三免服务特殊卡片 */
.highlight-card.free-service {
    grid-column: 1 / -1;
    background:
        linear-gradient(135deg, rgba(74,124,89,0.88), rgba(106,158,116,0.88)),
        url("../images/3.jpg") no-repeat center center;
    background-size: cover;
    color: #fff;
    border: none;
}

.highlight-card.free-service .highlight-card-body {
    padding: var(--spacing-lg) var(--spacing-md);
}

.highlight-card.free-service .highlight-card-title {
    color: #fff;
}

.highlight-card.free-service .highlight-card-desc {
    color: rgba(255,255,255,0.85);
}

.free-tags {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    flex-wrap: wrap;
}

.free-tag {
    padding: 4px 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* ========================================
   S5: 出席确认
   ======================================== */
.section-rsvp {
    background: var(--color-bg);
}

.rsvp-box {
    background: var(--color-bg-section);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.rsvp-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.rsvp-btn {
    flex: 1;
    padding: 14px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
}

.rsvp-btn-confirm {
    background: var(--color-success);
    color: #fff;
}

.rsvp-btn-confirm:hover {
    background: #219a52;
    box-shadow: 0 4px 12px rgba(39,174,96,0.3);
}

.rsvp-btn-confirm.pulse {
    animation: btn-pulse 2s ease infinite;
}

@keyframes btn-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(39,174,96,0.4); }
    50% { box-shadow: 0 0 0 8px rgba(39,174,96,0); }
}

.rsvp-btn-decline {
    background: transparent;
    color: var(--color-text-muted);
    border-color: var(--color-border);
}

.rsvp-btn-decline:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text-light);
}

.rsvp-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    animation: none;
}

/* 确认状态显示 */
.rsvp-status {
    text-align: center;
    padding: var(--spacing-md);
}

.rsvp-status-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-xs);
}

.rsvp-status-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.rsvp-status-text.confirmed {
    color: var(--color-success);
}

.rsvp-status-text.declined {
    color: var(--color-text-muted);
}

.rsvp-modify-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    transition: var(--transition);
}

.rsvp-modify-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* 随行人表单 */
.companion-form {
    display: none;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.companion-form.show {
    display: block;
}

.companion-form h4 {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.companion-row {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.companion-row input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    outline: none;
    transition: border-color 0.2s;
}

.companion-row input:focus {
    border-color: var(--color-primary);
}

.companion-row input::placeholder {
    color: var(--color-text-muted);
}

.rsvp-submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-family);
    transition: var(--transition);
    margin-top: var(--spacing-sm);
}

.rsvp-submit-btn:hover {
    background: var(--color-primary-dark);
}

.rsvp-submit-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* 缺席原因 */
.decline-form {
    display: none;
    margin-top: var(--spacing-md);
}

.decline-form.show {
    display: block;
}

.decline-form textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    resize: vertical;
    min-height: 60px;
    outline: none;
}

.decline-form textarea:focus {
    border-color: var(--color-primary);
}

.rsvp-deadline {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

.rsvp-locked {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-muted);
}

.rsvp-locked-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   S6: 实用信息
   ======================================== */
.section-info {
    background: var(--color-bg-section);
}

.info-list {
    list-style: none;
}

.info-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.info-item:last-child {
    border-bottom: none;
}

.info-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: rgba(74,124,89,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 16px;
}

.info-content h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.info-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   S7: 路线导航
   ======================================== */
.section-nav {
    background: var(--color-bg);
}

.nav-location {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg-section);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
}

.nav-location-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.nav-location-address {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.nav-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--color-border);
    background: var(--color-bg-section);
    color: var(--color-text);
    cursor: pointer;
}

.nav-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(74,124,89,0.05);
}

.nav-btn .nav-icon {
    width: 24px;
    height: 24px;
}

/* ========================================
   S8: 联系咨询
   ======================================== */
.section-contact {
    background: var(--color-bg-section);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-card {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition);
    display: block;
}

.contact-card:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.contact-card-icon {
    font-size: 28px;
    margin-bottom: var(--spacing-xs);
}

.contact-card-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.contact-card-value {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* 咨询表单 */
.inquiry-form {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.inquiry-form h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.inquiry-form select,
.inquiry-form textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg-section);
    outline: none;
    margin-bottom: var(--spacing-xs);
}

.inquiry-form textarea {
    min-height: 80px;
    resize: vertical;
}

.inquiry-form select:focus,
.inquiry-form textarea:focus {
    border-color: var(--color-primary);
}

.inquiry-submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-family);
    transition: var(--transition);
}

.inquiry-submit-btn:hover {
    background: var(--color-primary-dark);
}

/* ========================================
   S9: 页脚
   ======================================== */
.section-footer {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.8);
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
}

.footer-organizer {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.footer-organizer strong {
    color: #fff;
    display: block;
    margin-bottom: 4px;
}

.footer-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
    font-family: var(--font-family);
}

.footer-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.5);
    margin-top: var(--spacing-sm);
}

/* ========================================
   Toast 提示
   ======================================== */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--color-text);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    z-index: 10000;
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
    max-width: 90%;
    text-align: center;
}

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

.toast.success {
    background: var(--color-success);
}

.toast.error {
    background: var(--color-accent);
}

/* ========================================
   Loading 状态
   ======================================== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

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

/* ========================================
   错误页面
   ======================================== */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
}

.error-page h1 {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.error-page p {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
}

/* ========================================
   风光画廊
   ======================================== */
.section-gallery {
    background: var(--color-bg);
    padding: var(--spacing-xl) 0;
}

.gallery-wrapper {
    position: relative;
}

.gallery-scroll {
    display: flex;
    flex-wrap: nowrap;
    gap: var(--spacing-sm);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--spacing-md) var(--spacing-sm);
    scrollbar-width: none;
    cursor: grab;
}

.gallery-scroll:active {
    cursor: grabbing;
}

.gallery-scroll::-webkit-scrollbar {
    display: none;
}

/* 左右箭头按钮 */
.gallery-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.92);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.gallery-arrow:hover {
    background: #fff;
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.08);
}

.gallery-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.gallery-arrow-left {
    left: 6px;
}

.gallery-arrow-right {
    right: 6px;
}

.gallery-item {
    flex: none;
    width: 75%;
    min-width: 75%;
    scroll-snap-align: center;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
    user-select: none;
    -webkit-user-select: none;
}

.gallery-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-item-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px var(--spacing-sm) var(--spacing-xs);
    background: linear-gradient(to top, rgba(0,0,0,0.55), transparent);
    color: #fff;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.gallery-dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: var(--spacing-sm);
}

.gallery-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-border);
    transition: var(--transition);
}

.gallery-dot.active {
    width: 20px;
    background: var(--color-primary);
}

/* ========================================
   滚动渐入动画
   ======================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   隐藏元素
   ======================================== */
.hidden {
    display: none !important;
}

/* ========================================
   响应式 - 平板 (768px+)
   ======================================== */
@media (min-width: 768px) {
    :root {
        --container-max: 680px;
        --font-size-3xl: 42px;
        --font-size-2xl: 32px;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .highlights-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    .nav-buttons {
        flex-direction: row;
    }

    .nav-btn {
        flex: 1;
    }

    .gallery-item {
        flex: 0 0 45%;
    }

    .gallery-item img {
        height: 260px;
    }

    .highlight-card-image {
        height: 150px;
    }
}

/* ========================================
   响应式 - 桌面 (1024px+)
   ======================================== */
@media (min-width: 1024px) {
    :root {
        --container-max: 720px;
    }

    .section-hero {
        min-height: 100vh;
    }
}

/* ========================================
   小屏幕适配 (320px)
   ======================================== */
@media (max-width: 374px) {
    :root {
        --font-size-3xl: 28px;
        --font-size-2xl: 22px;
    }

    .hero-title {
        letter-spacing: 2px;
    }

    .rsvp-buttons {
        flex-direction: column;
    }

    .highlights-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}