* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


/* 头部横幅 */
.hero {
    background: #ffffff;
    padding: 2.5rem 2rem 1.8rem 2rem;
    text-align: center;
    border-bottom: 1px solid #eef2f9;
}
.hero h1 {
    font-size: 2.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #1e3c72, #2b4c7c);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.3px;
    margin-bottom: 0.5rem;
}
.hero .sub {
    font-size: 1.1rem;
    color: #4a627a;
    max-width: 600px;
    margin: 0.75rem auto 0;
}

/* 内容区域 */
.content {
    padding: 2rem 2rem 2.5rem 2rem;
}

/* 原则网格 */
.principles {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 2.8rem;
}
.principle-item {
    flex: 1;
    min-width: 180px;
    background: #f9fbfe;
    border-radius: 1.5rem;
    padding: 1.4rem 1rem;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid #e9edf4;
}
.principle-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 20px -12px rgba(0, 0, 0, 0.1);
    background: #ffffff;
}
.principle-icon {
    font-size: 2.2rem;
    margin-bottom: 0.75rem;
    display: inline-block;
}
.principle-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1e3c72;
}
.principle-item p {
    color: #4a5b6e;
    font-size: 0.95rem;
}

/* 通用章节样式 */
.section {
    margin-bottom: 2.5rem;
}
.section-title {
    font-size: 1.7rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    color: #1e2f3f;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-left: 5px solid #2b6e9e;
    padding-left: 1rem;
}
/* 为“赞助方式”标题单独增加上下间距 */
.sponsor-methods-title {
    margin-top: 1.8rem;
    margin-bottom: 2rem;
}
.section-title i {
    font-style: normal;
    font-weight: 400;
    font-size: 1.3rem;
}
.card-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.8rem;
    margin-top: 0.5rem;
}
.info-card {
    flex: 1;
    min-width: 240px;
    background: #fafcff;
    border-radius: 1.5rem;
    padding: 1.4rem 1.6rem;
    border: 1px solid #eef2f9;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}
.info-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e3c72;
}
.info-card ul, .info-card p {
    color: #2c3f4f;
    font-size: 0.95rem;
}
.info-card li {
    margin-bottom: 0.5rem;
    margin-left: 1.2rem;
}
.badge {
    background: #eef2fa;
    border-radius: 40px;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    color: #2b6e9e;
    display: inline-block;
    margin-bottom: 0.75rem;
}

/* 赞助方式区域 (双栏) */
.payment-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 1.5rem 0 1rem;
}
.method {
    flex: 1;
    min-width: 200px;
    background: #ffffff;
    border-radius: 1.5rem;
    border: 1px solid #e9edf4;
    padding: 1.2rem;
    text-align: center;   /* 使内部所有内联/内联块元素居中 */
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}
.method h4 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: #1e3c72;
}
.qr-placeholder {
    background: #f4f7fc;
    border-radius: 1rem;
    padding: 0.5rem;
    margin: 1rem auto;
    width: 140px;
    height: 140px;
    border: 1px dashed #bdd3e8;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    font-size: 0.8rem;
    color: #2b6e9e;
    background: #f9fafc;
    overflow: hidden;
}
.qr-placeholder svg {
    width: 70px;
    height: 70px;
    margin-bottom: 8px;
    opacity: 0.6;
}
.method-note {
    font-size: 0.8rem;
    color: #6c7e94;
    margin-top: 0.5rem;
}
.btn-outline {
    background: transparent;
    border: 1px solid #cbdde9;
    padding: 0.4rem 1rem;
    border-radius: 60px;
    font-size: 0.8rem;
    cursor: default;
    display: inline-block;
}
hr {
    margin: 1.5rem 0;
    border: none;
    height: 1px;
    background: #e9edf4;
}

 /* 鸣谢列表 - 增加金额列 */
 .thanks-list {
    background: #f9fbfe;
    border-radius: 1.5rem;
    padding: 1.2rem 1.5rem;
    border: 1px solid #eef2f9;
    margin-top: 1rem;
}
.thanks-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0;
    border-bottom: 1px dashed #e2e8f0;
    font-size: 0.95rem;
}
.thanks-item:last-child {
    border-bottom: none;
}
.thanks-name {
    font-weight: 500;
    color: #1e3c72;
}
.amount-badge {
    background: #eef2fa;
    border-radius: 30px;
    padding: 0.2rem 0.7rem;
    font-size: 0.75rem;
    color: #2c5a7a;
    margin-left: 0.6rem;
    font-weight: normal;
}
.thanks-date {
    font-size: 0.8rem;
    color: #7c8ea0;
}
.footer-note {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: #6c7e94;
    border-top: 1px solid #eef2f9;
    padding-top: 1.8rem;
}
@media (max-width: 680px) {
    .hero h1 { font-size: 1.8rem; }
    .content { padding: 1.5rem; }
    .section-title { font-size: 1.4rem; }
    .principle-item h3 { font-size: 1.1rem; }
}