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

:root {
    --pink: #FFB6D9;
    --blue: #B6E5FF;
    --green: #B6FFE5;
    --light-blue: #7FC8F8;
    --dark-blue: #5BA8D9;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--white);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: hidden;
    overflow-y: auto;
    position: relative;
    padding: 20px;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('beijing.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    filter: blur(3px);
    z-index: -2;
    transform: scale(1.05);
}

/* 背景纹理 - 波点 */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, var(--pink) 2px, transparent 2px),
                      radial-gradient(circle, var(--blue) 1px, transparent 1px),
                      radial-gradient(circle, var(--green) 1.5px, transparent 1.5px);
    background-size: 60px 60px, 40px 40px, 50px 50px;
    background-position: 0 0, 30px 30px, 15px 15px;
    opacity: 0.08;
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

/* Header 区域（白色背景） */
.header-section {
    background: var(--white);
    border-radius: 40px;
    padding: 40px 50px;
    margin-bottom: 30px;
    box-shadow: 0 15px 40px var(--shadow),
                0 0 0 3px var(--pink),
                0 0 0 6px var(--blue);
    display: flex;
    align-items: center;
    gap: 30px;
    animation: fadeInUp 0.6s ease-out;
    position: relative;
}

.header-section::before,
.header-section::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    border-radius: 50%;
}

.header-section::before {
    top: -8px;
    left: -8px;
    background: var(--pink);
    box-shadow: 0 4px 8px var(--shadow);
}

.header-section::after {
    top: -8px;
    right: -8px;
    background: var(--blue);
    box-shadow: 0 4px 8px var(--shadow);
}

/* Logo 容器 */
.logo-container {
    flex-shrink: 0;
}

.logo-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue), var(--pink));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px var(--shadow),
                0 0 0 4px var(--white);
    position: relative;
    overflow: hidden;
    padding: 8px;
}

.logo-circle::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    top: 10%;
    left: 10%;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

/* Header 内容 */
.header-content {
    flex: 1;
}

.main-title {
    font-size: 2.8em;
    font-weight: 900;
    color: var(--dark-blue);
    margin-bottom: 15px;
    text-shadow: 2px 2px 0 var(--pink),
                 4px 4px 0 var(--blue);
    letter-spacing: 1px;
}

.subtitle {
    font-size: 1.1em;
    font-weight: 700;
    color: #333;
    line-height: 1.6;
}

.url-link {
    color: var(--dark-blue);
    text-decoration: underline;
    transition: all 0.3s ease;
}

.url-link:hover {
    color: var(--pink);
    text-decoration: none;
    animation: bounce 0.3s ease;
}

/* 主要内容区域（蓝色背景） */
.main-section {
    background: linear-gradient(135deg, var(--light-blue), var(--blue));
    border-radius: 40px;
    padding: 50px 45px;
    box-shadow: 0 20px 50px var(--shadow),
                0 0 0 3px var(--green),
                0 0 0 6px var(--pink);
    animation: fadeInUp 0.8s ease-out;
    position: relative;
}

.main-section::before,
.main-section::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    border-radius: 50%;
}

.main-section::before {
    bottom: -8px;
    left: -8px;
    background: var(--green);
    box-shadow: 0 4px 8px var(--shadow);
}

.main-section::after {
    bottom: -8px;
    right: -8px;
    background: var(--pink);
    box-shadow: 0 4px 8px var(--shadow);
}

/* 内容块 */
.content-block {
    margin-bottom: 40px;
}

.content-block:last-child {
    margin-bottom: 0;
}

/* 块标题 */
.block-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.icon-diamond,
.icon-heart {
    font-size: 1.5em;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

.icon-heart {
    color: #FFB6D9;
}

.block-title {
    font-size: 1.8em;
    font-weight: 900;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 1px;
}

/* 块内容 */
.block-content {
    padding-left: 40px;
}

/* 链接项 */
.link-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 25px;
    margin-bottom: 15px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    text-decoration: none;
    color: #333;
    font-size: 1.1em;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1),
                0 0 0 3px var(--white);
    position: relative;
    overflow: hidden;
}

.link-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 182, 217, 0.3), transparent);
    transition: left 0.5s;
}

.link-item:hover::before {
    left: 100%;
}

.link-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15),
                0 0 0 3px var(--white);
    animation: bounce 0.4s ease;
}

.link-item:active {
    transform: translateY(-2px) scale(1.01);
}

.link-text {
    position: relative;
    z-index: 1;
    flex: 1;
}

.icon-check {
    font-size: 1.5em;
    position: relative;
    z-index: 1;
    margin-left: 15px;
    display: inline-block;
    animation: point-pulse 1.5s ease-in-out infinite;
    cursor: pointer;
}

@keyframes point-pulse {
    0%, 100% {
        transform: translateX(0) scale(1);
    }
    50% {
        transform: translateX(5px) scale(1.1);
    }
}

.link-item:hover .icon-check {
    animation: point-bounce 0.5s ease-in-out infinite;
}

@keyframes point-bounce {
    0%, 100% {
        transform: translateX(0) scale(1.2);
    }
    50% {
        transform: translateX(8px) scale(1.3);
    }
}

/* 提示文本 */
.tip-text {
    font-size: 1.1em;
    font-weight: 700;
    color: var(--white);
    line-height: 1.8;
    margin-bottom: 20px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

/* 下载链接 */
.download-link {
    display: inline-block;
    padding: 15px 35px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    text-decoration: none;
    color: var(--dark-blue);
    font-size: 1.1em;
    font-weight: 900;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1),
                0 0 0 3px var(--white);
    position: relative;
    overflow: hidden;
    letter-spacing: 1px;
}

.download-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(182, 229, 255, 0.4), transparent);
    transition: left 0.5s;
}

.download-link:hover::before {
    left: 100%;
}

.download-link:hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15),
                0 0 0 3px var(--white);
    animation: bounce 0.4s ease;
}

.download-link:active {
    transform: translateY(-3px) scale(1.02);
}

/* 友情链接栏 */
.friendship-links-section {
    margin-top: 30px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 40px;
    padding: 35px 40px;
    box-shadow: 0 15px 40px var(--shadow),
                0 0 0 3px var(--green),
                0 0 0 6px var(--pink);
    animation: fadeInUp 1s ease-out;
    position: relative;
}

.friendship-links-section::before,
.friendship-links-section::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.friendship-links-section::before {
    top: -6px;
    left: -6px;
    background: var(--green);
    box-shadow: 0 3px 6px var(--shadow);
}

.friendship-links-section::after {
    bottom: -6px;
    right: -6px;
    background: var(--pink);
    box-shadow: 0 3px 6px var(--shadow);
}

.friendship-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 25px;
}

.icon-link {
    font-size: 1.8em;
    animation: link-rotate 3s ease-in-out infinite;
}

@keyframes link-rotate {
    0%, 100% {
        transform: rotate(0deg) scale(1);
    }
    25% {
        transform: rotate(-15deg) scale(1.1);
    }
    75% {
        transform: rotate(15deg) scale(1.1);
    }
}

.friendship-title {
    font-size: 1.6em;
    font-weight: 900;
    color: #333;
    text-shadow: 2px 2px 0 var(--pink);
    letter-spacing: 1px;
}

.friendship-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.friendship-link {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--pink), var(--blue));
    border-radius: 25px;
    text-decoration: none;
    color: var(--white);
    font-size: 1em;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1),
                0 0 0 3px var(--white);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.friendship-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.friendship-link:hover::before {
    left: 100%;
}

.friendship-link:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15),
                0 0 0 3px var(--white);
    animation: friendship-bounce 0.5s ease;
}

.friendship-link:active {
    transform: translateY(-2px) scale(1.02);
}

@keyframes friendship-bounce {
    0%, 100% {
        transform: translateY(-5px) scale(1.05);
    }
    50% {
        transform: translateY(-8px) scale(1.08);
    }
}

.friendship-link-text {
    position: relative;
    z-index: 1;
    display: block;
}

/* 浮动装饰元素 */
.floating-decor {
    position: fixed;
    border-radius: 50%;
    opacity: 0.5;
    animation: float 4s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.decor-1 {
    width: 100px;
    height: 100px;
    background: var(--pink);
    top: 15%;
    right: 5%;
    animation-delay: 0s;
    box-shadow: 0 8px 16px var(--shadow);
}

.decor-2 {
    width: 70px;
    height: 70px;
    background: var(--blue);
    bottom: 20%;
    left: 5%;
    animation-delay: 1.5s;
    box-shadow: 0 8px 16px var(--shadow);
}

.decor-3 {
    width: 90px;
    height: 90px;
    background: var(--green);
    top: 60%;
    right: 8%;
    animation-delay: 3s;
    box-shadow: 0 8px 16px var(--shadow);
}

/* 动画 */
@keyframes bounce {
    0%, 100% {
        transform: translateY(-5px) scale(1.02);
    }
    50% {
        transform: translateY(-8px) scale(1.05);
    }
}

@keyframes bounce-slow {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-25px) rotate(180deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-section {
        flex-direction: column;
        text-align: center;
        padding: 35px 30px;
        border-radius: 30px;
    }

    .logo-circle {
        width: 100px;
        height: 100px;
    }

    .main-title {
        font-size: 2.2em;
    }

    .subtitle {
        font-size: 1em;
    }

    .main-section {
        padding: 35px 30px;
        border-radius: 30px;
    }

    .block-title {
        font-size: 1.5em;
    }

    .block-content {
        padding-left: 0;
    }

    .link-item {
        padding: 15px 20px;
        font-size: 1em;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .icon-check {
        align-self: flex-end;
        margin-left: 0;
    }

    .friendship-links-section {
        padding: 25px 20px;
        border-radius: 30px;
    }

    .friendship-title {
        font-size: 1.4em;
    }

    .friendship-link {
        padding: 10px 20px;
        font-size: 0.9em;
    }

    .floating-decor {
        display: none;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .header-section {
        padding: 25px 20px;
    }

    .logo-circle {
        width: 80px;
        height: 80px;
    }

    .main-title {
        font-size: 1.8em;
    }

    .main-section {
        padding: 25px 20px;
    }

    .block-title {
        font-size: 1.3em;
    }

    .link-item,
    .download-link {
        font-size: 0.95em;
        padding: 12px 18px;
    }

    .friendship-links-section {
        padding: 20px 15px;
        border-radius: 25px;
    }

    .friendship-title {
        font-size: 1.2em;
    }

    .friendship-links {
        gap: 10px;
    }

    .friendship-link {
        padding: 10px 18px;
        font-size: 0.85em;
    }
}