/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 日本传统配色 - 和风色彩 */
    --primary-color: #2C5F7C; /* 藏青色 */
    --secondary-color: #8B4E6F; /* 古紫色 */
    --accent-color: #D4A574; /* 金茶色 */
    --light-pink: #F5E6E8; /* 桜色 */
    --dark-text: #2C2C2C;
    --light-text: #6B6B6B;
    --white: #FFFFFF;
    --cream: #FAF8F5;
    --border-light: #E5E5E5;
    
    /* Typography */
    --font-main: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
    --font-accent: 'Noto Serif JP', serif;
}

body {
    font-family: var(--font-main);
    color: var(--dark-text);
    line-height: 1.8;
    background-color: var(--cream);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 26px;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-text);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(44, 95, 124, 0.3);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url(../images/bgc.jpg)no-repeat center center;
    background-size: cover;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    padding: 10px 25px;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 25px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    letter-spacing: 1px;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: 2px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    display: block;
    margin-top: 10px;
    letter-spacing: 8px;
}

.hero-description {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    font-weight: 600;
    opacity: 0.95;
    letter-spacing: 1px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary,
.btn-secondary {
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid white;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-3px);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    font-size: 12px;
    letter-spacing: 2px;
}

.scroll-indicator {
    width: 2px;
    height: 40px;
    background: white;
    margin: 10px auto;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* ===== Section Styles ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--light-text);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== About Section ===== */
.about {
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.about-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 15px;
    background: var(--cream);
    transition: all 0.3s ease;
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.card-icon i {
    display: block;
}

.about-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.about-card p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--light-text);
}

/* ===== Details Section ===== */
.details {
    background: var(--light-pink);
}

.details-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.detail-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.detail-icon {
    font-size: 32px;
    flex-shrink: 0;
    color: var(--accent-color);
    width: 50px;
    text-align: center;
}

.detail-icon i {
    display: block;
}

.detail-info h4 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.detail-info p {
    font-size: 16px;
    color: var(--light-text);
    line-height: 1.6;
}

.details-image {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.image-placeholder {
    text-align: center;
}

.image-placeholder i {
    font-size: 100px;
    display: block;
    margin-bottom: 20px;
}

.image-placeholder p {
    font-size: 28px;
    font-weight: 300;
    line-height: 1.6;
}

/* ===== Themes Section ===== */
.themes {
    background: white;
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.theme-card {
    background: var(--cream);
    padding: 40px;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.theme-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.theme-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 72px;
    font-weight: 700;
    color: rgba(44, 95, 124, 0.08);
}

.theme-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.theme-icon i {
    display: block;
}

.theme-card h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.theme-card > p {
    font-size: 16px;
    color: var(--light-text);
    margin-bottom: 20px;
    line-height: 1.8;
}

.theme-features {
    list-style: none;
    margin-top: 20px;
}

.theme-features li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    font-size: 15px;
    color: var(--light-text);
}

.theme-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* ===== Reviews Section ===== */
.reviews {
    background: var(--light-pink);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background: white;
    padding: 35px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.review-stars {
    color: var(--accent-color);
    font-size: 18px;
    margin-bottom: 20px;
}

.review-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--light-text);
    margin-bottom: 25px;
    min-height: 120px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
}

.author-info h4 {
    font-size: 16px;
    margin-bottom: 3px;
}

.author-info p {
    font-size: 13px;
    color: var(--light-text);
}

/* ===== Participate Section ===== */
.participate {
    background: white;
}

.participate-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
}

.participate-intro {
    font-size: 18px;
    color: var(--light-text);
    margin-bottom: 40px;
    line-height: 1.8;
}

.participate-option {
    background: var(--cream);
    padding: 35px;
    border-radius: 15px;
    margin-bottom: 25px;
    border-left: 4px solid var(--primary-color);
}

.participate-option h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.participate-option h3 i {
    font-size: 24px;
}

.participate-option p {
    font-size: 16px;
    color: var(--light-text);
    line-height: 1.8;
    margin-bottom: 20px;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.participate-commitment {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 40px;
    border-radius: 15px;
    color: white;
}

.participate-commitment h3 {
    font-size: 24px;
    margin-bottom: 25px;
}

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

.commitment-list li {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.commitment-icon {
    background: rgba(255, 255, 255, 0.2);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
    font-size: 14px;
}

.commitment-icon i {
    font-size: 12px;
}

.commitment-list p {
    font-size: 15px;
    line-height: 1.8;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
    padding: 80px 0;
}

.cta-content h2 {
    font-size: 42px;
    margin-bottom: 20px;
    font-weight: 700;
}

.cta-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.btn-primary-large {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 18px 50px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* ===== Footer ===== */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-section p {
    font-size: 14px;
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
}

.footer-bottom p {
    font-size: 14px;
    color: #888;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 50px;
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 30px;
    font-weight: 300;
    color: var(--light-text);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--dark-text);
}

.modal-content h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.modal-content > p {
    font-size: 16px;
    color: var(--light-text);
    margin-bottom: 30px;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 15px;
    border: 2px solid var(--border-light);
    border-radius: 10px;
    font-size: 15px;
    font-family: var(--font-main);
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form button {
    margin-top: 10px;
}

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
    .navbar{
        display: none;
    }
    .nav-menu {
        display: none;
    }
    
    .hero {
        height: auto;
        min-height: 100vh;
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 22px;
        letter-spacing: 4px;
    }
    
    .hero-description {
        font-size: 16px;
        padding: 0 20px;
    }
    
    .hero-stats {
        gap: 40px;
        flex-wrap: wrap;
    }
    
    .stat-number {
        font-size: 40px;
    }
    
    .about-grid,
    .themes-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    /* 优化themes卡片在手机端的显示 */
    .theme-card {
        text-align: left;
        padding: 35px 25px;
    }
    
    .theme-number {
        font-size: 60px;
        top: 15px;
        right: 15px;
    }
    
    .details-content,
    .participate-content {
        grid-template-columns: 1fr;
    }
    
    .details-image {
        height: 350px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 36px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0 40px;
        min-height: auto;
    }
    
    .hero-badge {
        font-size: 12px;
        padding: 6px 15px;
        margin-bottom: 20px;
    }
    
    .hero-title {
        font-size: 32px;
        margin-bottom: 15px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        letter-spacing: 2px;
    }
    
    .hero-description {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 30px;
        padding: 0 10px;
    }
    
    .hero-stats {
        flex-direction: row;
        gap: 25px;
        margin-bottom: 30px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .stat-label {
        font-size: 12px;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 15px;
        padding: 0 20px;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 14px 30px;
        font-size: 15px;
    }
    
    .hero-scroll {
        bottom: 20px;
        font-size: 11px;
    }
    
    section {
        padding: 50px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .section-tag {
        font-size: 12px;
        letter-spacing: 2px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 15px;
    }
    
    /* About卡片优化 */
    .about-card {
        padding: 30px 20px;
    }
    
    .card-icon {
        font-size: 40px;
        margin-bottom: 15px;
    }
    
    .about-card h3 {
        font-size: 20px;
    }
    
    .about-card p {
        font-size: 14px;
    }
    
    /* Details优化 */
    .details-text .section-tag {
        display: block;
        text-align: center;
    }
    
    .details-text h2 {
        text-align: center;
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .detail-item {
        margin-bottom: 25px;
    }
    
    .detail-icon {
        font-size: 28px;
        width: 45px;
    }
    
    .detail-info h4 {
        font-size: 18px;
    }
    
    .detail-info p {
        font-size: 14px;
    }
    
    .details-image {
        height: 300px;
    }
    
    /* Themes优化 - 确保内容对齐 */
    .theme-card {
        padding: 30px 20px;
    }
    
    .theme-icon {
        font-size: 40px;
        margin-bottom: 15px;
    }
    
    .theme-card h3 {
        font-size: 24px;
        margin-bottom: 12px;
    }
    
    .theme-card > p {
        font-size: 14px;
        margin-bottom: 15px;
    }
    
    .theme-features li {
        font-size: 14px;
        padding: 8px 0;
    }
    
    /* Reviews优化 */
    .review-card {
        padding: 25px 20px;
    }
    
    .review-text {
        font-size: 14px;
        min-height: auto;
        margin-bottom: 20px;
    }
    
    .author-avatar {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .author-info h4 {
        font-size: 15px;
    }
    
    .author-info p {
        font-size: 12px;
    }
    
    /* Participate优化 */
    .participate-text .section-tag {
        display: block;
        text-align: center;
    }
    
    .participate-text h2 {
        text-align: center;
        font-size: 28px;
        margin-bottom: 20px;
    }
    
    .participate-intro {
        font-size: 15px;
        text-align: center;
        margin-bottom: 30px;
    }
    
    .participate-option {
        padding: 25px 20px;
        margin-bottom: 20px;
    }
    
    .participate-option h3 {
        font-size: 19px;
    }
    
    .participate-option p {
        font-size: 14px;
    }
    
    .participate-commitment {
        padding: 30px 20px;
    }
    
    .participate-commitment h3 {
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    .commitment-list li {
        margin-bottom: 15px;
        gap: 12px;
    }
    
    .commitment-list p {
        font-size: 14px;
    }
    
    .participate-commitment img {
        max-width: 100%;
        margin-top: 20px;
    }
    
    /* CTA Section优化 */
    .cta-section {
        padding: 50px 0;
    }
    
    .cta-content h2 {
        font-size: 26px;
        margin-bottom: 15px;
        line-height: 1.4;
    }
    
    .cta-content p {
        font-size: 15px;
        margin-bottom: 30px;
    }
    
    .btn-primary-large {
        padding: 15px 35px;
        font-size: 16px;
        width: 100%;
        max-width: 300px;
    }
    
    /* Modal优化 */
    .modal-content {
        padding: 30px 20px;
        width: 95%;
    }
    
    .modal-content h2 {
        font-size: 24px;
    }
    
    .modal-content > p {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .contact-form input,
    .contact-form select,
    .contact-form textarea {
        padding: 12px;
        font-size: 14px;
    }
    
    /* Footer优化 */
    .footer {
        padding: 40px 0 15px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 30px;
    }
    
    .footer-section h4 {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .footer-section p,
    .footer-section ul li a {
        font-size: 13px;
    }
}








/* ===== CTA Buttons Revamp ===== */

/* 通用按钮（黄色底，黑字，立体感；长度更短、高度更厚） */
.btn-primary, .btn-secondary, .btn-outline, .btn-primary-large, .nav-cta {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 16px 28px;        /* ↑ 高度感 */
  min-width: 180px;          /* ↓ 缩短 */
  max-width: 280px;          /* 限制过长 */
  font-weight: 800;
  font-size: 17px;
  line-height: 1;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  background: linear-gradient(#FFE56A, #FFD700);
  color: #111 !important;    /* 黑字 */
  text-decoration: none !important;
  box-shadow:
    0 6px 14px rgba(0,0,0,.18),
    inset 0 1px 0 rgba(255,255,255,.6),
    inset 0 -2px 0 rgba(0,0,0,.08);
  transition: transform .1s ease, box-shadow .15s ease, filter .15s ease;
}
.btn-primary:hover, .btn-secondary:hover, .btn-outline:hover, .btn-primary-large:hover, .nav-cta:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0,0,0,.22);
}
.btn-primary:active, .btn-secondary:active, .btn-outline:active, .btn-primary-large:active, .nav-cta:active {
  transform: translateY(1px);
}

/* 二级按钮沿用同视觉，若需区分可稍降亮度 */
// .btn-secondary { filter: saturate(.98); }

/* 参与区块中的按钮保持一致 */
.participate .btn-outline { background: linear-gradient(#FFE56A, #FFD700); }

/* 移动端适配：按钮可满宽但更厚实 */
@media (max-width: 768px) {
  .btn-primary, .btn-secondary, .btn-outline, .btn-primary-large, .nav-cta {
    width: 100%;
    min-width: 0;
    padding: 18px 20px;
    font-size: 16px;
  }
}

/* ===== 底部固定按钮（与主按钮区分配色） ===== */
.fixed-cta {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  width: min(92%, 480px);
  z-index: 9999;
}
.fixed-cta-btn {
  width: 100%;
  padding: 18px 28px;
  font-size: 18px;
  font-weight: 800;
  border-radius: 999px;
  border: 0;
  background: linear-gradient(#0b72ff, #004c99); /* 深蓝区分色 */
  color: #fff !important;
  box-shadow: 0 6px 16px rgba(0,0,0,.25);
  transition: transform .1s ease, box-shadow .15s ease, filter .15s ease;
}
.fixed-cta-btn:hover { filter: brightness(1.08); transform: translateY(-2px); }
.fixed-cta-btn:active { transform: translateY(1px); }

/* 为避免外链样式影响，确保按钮无下划线 */
button, .nav-cta, .btn-primary, .btn-secondary, .btn-outline, .btn-primary-large, .fixed-cta-btn {
  text-decoration: none !important;
}