/* ========== 全局样式 ========== */
/* Version: 2.0 - 可爱水蓝风格 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 可爱水蓝色配色 */
    --primary-blue: #87CEEB;
    --light-blue: #B0E0E6;
    --sky-blue: #87CEFA;
    --soft-pink: #FFB6C1;
    --cream-white: #FFF8F0;
    --cute-purple: #DDA0DD;

    /* 渐变色 */
    --gradient-blue: linear-gradient(135deg, #87CEEB 0%, #4FC3F7 100%);
    --gradient-pink: linear-gradient(135deg, #FFB6C1 0%, #FF69B4 100%);

    /* 阴影 */
    --shadow-strong: 0 10px 40px rgba(135, 206, 235, 0.4);
    --shadow-soft: 0 5px 20px rgba(135, 206, 235, 0.3);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    background: linear-gradient(to bottom, #E6F7FF, #FFF0F5);
    color: #333;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ========== 动态背景 ========== */
#vanta-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #E0F7FA, #F3E5F5, #E1F5FE);
}

/* ========== 角落装饰 ========== */
.corner-decorations {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.corner-img {
    position: fixed;
    width: 120px !important;
    height: 120px !important;
    min-width: 120px;
    min-height: 120px;
    max-width: 120px;
    max-height: 120px;
    object-fit: cover;
    object-position: center;
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    border: 3px solid var(--primary-blue);
    box-shadow: 0 0 15px rgba(135, 206, 235, 0.5),
                0 0 30px rgba(255, 182, 193, 0.3);
    animation: bounce 2s ease-in-out infinite;
    pointer-events: auto;
    transition: transform 0.3s ease;
    display: block;
    overflow: hidden;
    flex-shrink: 0;
}

.corner-img:hover {
    transform: scale(1.1) rotate(5deg);
}

.left-corner {
    top: 10px !important;
    left: 10px !important;
    right: auto !important;
    animation-delay: 0s;
}

.right-corner {
    top: 10px !important;
    right: 10px !important;
    left: auto !important;
    animation-delay: 0.5s;
}

/* ========== 容器 ========== */
.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

/* ========== 标题区域 ========== */
.header {
    text-align: center;
    margin-bottom: 20px;
    margin-top: 10px;
    animation: fadeInDown 1s ease-out;
}

/* 头像容器 */
.avatar-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    animation: fadeIn 1.5s ease-out;
}

.avatar {
    width: clamp(80px, 15vw, 120px);
    height: clamp(80px, 15vw, 120px);
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-blue);
    box-shadow: 0 0 20px rgba(135, 206, 235, 0.5),
                0 0 40px rgba(135, 206, 235, 0.3),
                inset 0 0 10px rgba(255, 182, 193, 0.2);
    transition: all 0.4s ease;
    animation: avatarGlow 3s ease-in-out infinite;
}

.avatar:hover {
    transform: scale(1.08) rotate(5deg);
    box-shadow: 0 0 30px rgba(135, 206, 235, 0.8),
                0 0 60px rgba(255, 182, 193, 0.5),
                inset 0 0 15px rgba(135, 206, 235, 0.3);
}

.main-title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.1em;
    text-shadow: 0 0 30px rgba(135, 206, 235, 0.6);
    position: relative;
    filter: drop-shadow(2px 2px 4px rgba(255, 182, 193, 0.3));
}

.title-char {
    display: inline-block;
    animation: floatChar 3s ease-in-out infinite;
}

.title-char:nth-child(1) { animation-delay: 0s; }
.title-char:nth-child(2) { animation-delay: 0.1s; }
.title-char:nth-child(3) { animation-delay: 0.2s; }
.title-char:nth-child(4) { animation-delay: 0.3s; }
.title-char:nth-child(5) { animation-delay: 0.4s; }
.title-char:nth-child(6) { animation-delay: 0.5s; }
.title-char:nth-child(7) { animation-delay: 0.6s; }
.title-char:nth-child(8) { animation-delay: 0.7s; }
.title-char:nth-child(9) { animation-delay: 0.8s; }
.title-char:nth-child(10) { animation-delay: 0.9s; }
.title-char:nth-child(11) { animation-delay: 1s; }

.subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--soft-pink);
    letter-spacing: 0.3em;
    opacity: 0.95;
    font-weight: 500;
}

.ornament {
    margin: 0 15px;
    display: inline-block;
    animation: rotate 4s linear infinite;
}

.subtitle-text {
    position: relative;
    padding: 0 20px;
}

/* ========== 视频区域 ========== */
.video-section {
    margin: 10px 0;
    animation: fadeInUp 1.2s ease-out;
}

.section-title {
    font-size: clamp(1.3rem, 3.5vw, 1.8rem);
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary-blue);
    letter-spacing: 0.15em;
    position: relative;
    font-weight: 600;
}

.title-ornament {
    font-size: 1.2em;
    margin: 0 10px;
    color: var(--soft-pink);
    font-weight: bold;
}

.video-container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 25px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 3px solid var(--primary-blue);
    box-shadow: var(--shadow-strong);
    transition: all 0.4s ease;
}

.video-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(135, 206, 235, 0.6);
    border-color: var(--soft-pink);
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 宽高比 */
    border-radius: 15px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 0 20px rgba(135, 206, 235, 0.4);
    border: 2px solid var(--light-blue);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-description {
    margin-top: 25px;
    text-align: center;
}

.video-description p {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: #555;
    margin-bottom: 15px;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.bilibili-link {
    display: inline-block;
    padding: 12px 30px;
    background: var(--gradient-blue);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(135, 206, 235, 0.4);
}

.bilibili-link:hover {
    transform: scale(1.05);
    background: var(--gradient-pink);
    box-shadow: 0 8px 25px rgba(255, 182, 193, 0.6);
    letter-spacing: 0.15em;
}

/* ========== 页脚 ========== */
.footer {
    margin-top: auto;
    padding-top: 40px;
    padding-bottom: 20px;
    text-align: center;
    animation: fadeIn 1.5s ease-out;
}

.footer-ornament {
    width: 100px;
    height: 3px;
    background: var(--gradient-blue);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.footer-text {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--primary-blue);
    letter-spacing: 0.2em;
    margin-bottom: 10px;
    opacity: 0.9;
    font-weight: 500;
}

.footer-year {
    font-size: 0.9rem;
    color: rgba(135, 206, 235, 0.7);
    letter-spacing: 0.1em;
}

/* ========== 动画效果 ========== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes avatarGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(135, 206, 235, 0.5),
                    0 0 40px rgba(135, 206, 235, 0.3),
                    inset 0 0 10px rgba(255, 182, 193, 0.2);
    }
    50% {
        box-shadow: 0 0 30px rgba(135, 206, 235, 0.8),
                    0 0 60px rgba(255, 182, 193, 0.5),
                    inset 0 0 15px rgba(135, 206, 235, 0.3);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .corner-img {
        width: 90px !important;
        height: 90px !important;
        min-width: 90px;
        min-height: 90px;
        max-width: 90px;
        max-height: 90px;
    }

    .left-corner,
    .right-corner {
        top: 5px;
    }

    .left-corner {
        left: 5px;
    }

    .right-corner {
        right: 5px;
    }

    .container {
        padding: 10px 15px 30px;
    }

    .header {
        margin-bottom: 15px;
        margin-top: 5px;
    }

    .avatar-container {
        margin-bottom: 15px;
    }

    .avatar {
        width: clamp(70px, 12vw, 100px);
        height: clamp(70px, 12vw, 100px);
        border-width: 2.5px;
    }

    .main-title {
        letter-spacing: 0.05em;
        margin-bottom: 8px;
    }

    .subtitle {
        letter-spacing: 0.2em;
        font-size: clamp(0.9rem, 2.5vw, 1.2rem);
    }

    .ornament {
        margin: 0 8px;
    }

    .video-section {
        margin: 8px 0;
    }

    .section-title {
        margin-bottom: 15px;
    }

    .video-container {
        padding: 15px;
        border-radius: 12px;
    }

    .bilibili-link {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .footer {
        padding-top: 30px;
    }
}

@media (max-width: 480px) {
    .corner-img {
        width: 70px !important;
        height: 70px !important;
        min-width: 70px;
        min-height: 70px;
        max-width: 70px;
        max-height: 70px;
        border-width: 2px;
    }

    .container {
        padding: 8px 10px 25px;
    }

    .header {
        margin-bottom: 12px;
        margin-top: 5px;
    }

    .avatar-container {
        margin-bottom: 12px;
    }

    .avatar {
        width: clamp(60px, 18vw, 90px);
        height: clamp(60px, 18vw, 90px);
        border-width: 2px;
    }

    .video-container {
        padding: 12px;
    }

    .video-section {
        margin: 5px 0;
    }

    .section-title {
        margin-bottom: 12px;
    }

    .title-ornament {
        margin: 0 5px;
    }

    .footer {
        padding-top: 25px;
    }
}

/* ========== 平滑滚动 ========== */
html {
    scroll-behavior: smooth;
}

/* ========== 选中文本样式 ========== */
::selection {
    background: rgba(135, 206, 235, 0.4);
    color: #333;
}

::-moz-selection {
    background: rgba(135, 206, 235, 0.4);
    color: #333;
}

/* ========== 滚动条样式 ========== */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(224, 247, 250, 0.5);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-blue);
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-pink);
}